Relevant bibliographies by topics / Emerging contaminants

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Emerging contaminants'

Author: Grafiati
Published: 4 June 2021
Last updated: 5 October 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Emerging contaminants.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Emerging contaminants"

1

Overton, Olivia Celeste, Leif Hans Olson, Sreemala Das Majumder, Hani Shwiyyat, Mary Elizabeth Foltz, and Robert William Nairn. "Wetland Removal Mechanisms for Emerging Contaminants." Land 12, no. 2 (February 14, 2023): 472. http://dx.doi.org/10.3390/land12020472.

Full text
Abstract:
In recent decades, previously unobserved trace compounds have become more widely detected in wastewater treatment effluents and freshwater ecosystems. Emanating from various sources and presenting potential human health and ecological risks at much lesser concentrations than traditional contaminants, detection of “emerging contaminants” has increased with improvements in analytical techniques. The behavior of emerging contaminants in wetlands is a topic of increasing interest, as natural wetlands are known to transform and sequester pollutants and constructed or treatment wetlands are widely utilized to address elevated concentrations of constituents of concern. Both natural and constructed wetlands are complex biogeochemical systems with interrelated abiotic and biotic mechanisms leading to the removal of emerging contaminants. A literature review was performed to assess the current state of knowledge of various wetland mechanisms involved in removing these contaminants from surface waters and effluents. The primary mechanisms discussed in the literature are sorption, photodegradation, microbial biodegradation and phytoremediation. The most influential mechanisms are dependent on the properties of the contaminants and wetland systems studied. Common trends exist for different constructed wetland designs to leverage various mechanisms based on hydrology, substrate and vegetation plantings. Much remains to be understood about the various processes occurring in wetlands as they relate to emerging contaminant removal. Improving the understanding of the potential role of wetland mechanisms can help manage this environmental challenge more effectively.
APA, Harvard, Vancouver, ISO, and other styles
2

Bandy, Ashley M. "Emerging Contaminants Handbook." Groundwater 57, no. 6 (September 5, 2019): 912. http://dx.doi.org/10.1111/gwat.12932.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Schnoor, Jerald L. "Emerging chemical contaminants." Environmental Science & Technology 37, no. 21 (November 2003): 375A. http://dx.doi.org/10.1021/es032604j.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Poynton, Helen C., and Chris D. Vulpe. "Ecotoxicogenomics: Emerging Technologies for Emerging Contaminants." JAWRA Journal of the American Water Resources Association 45, no. 1 (February 2009): 83–96. http://dx.doi.org/10.1111/j.1752-1688.2008.00291.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Geethamani, R., B. Soundara, and S. Kanmani. "Emerging contaminants in the environment and bioremediation control strategies – A review." IOP Conference Series: Earth and Environmental Science 1258, no. 1 (October 1, 2023): 012002. http://dx.doi.org/10.1088/1755-1315/1258/1/012002.

Full text
Abstract:
Abstract Rapid increase in population and emergence of many industries led to the emergence of contaminants from various sources such as domestic, industrial and agricultural activities etc. These contaminants reach the groundwater, surface water, municipal wastewater and food sources from agricultural fields. These pollutants contaminate the soil and in long term contaminate the groundwater sources due to transportation phenomena. Once the soil and groundwater are contaminated, the environment becomes a threat to the living beings. The objective of this article is to give an overview of the various types of contaminants, their emerging sources, their effect on the environment and suitable remediation techniques with emphasis on bioremediation techniques such as phytoremediation, phycoremediation, mycoremediation, bioventing, bioleaching, landfarming, bioreactor, composting, bioaugmentation, rhizofiltration, and biostimulation for treatment of these contaminants.This chapter mainly focusses on the fate of the contaminants emerging from various activities, their effects on the environment, remediation techniques and in specific the environmental friendly techniques to remediate the contaminated soil and water.
APA, Harvard, Vancouver, ISO, and other styles
6

Niu, Huixia, Manjin Xu, Pengcheng Tu, Yunfeng Xu, Xueqing Li, Mingluan Xing, Zhijian Chen, et al. "Emerging Contaminants: An Emerging Risk Factor for Diabetes Mellitus." Toxics 12, no. 1 (January 8, 2024): 47. http://dx.doi.org/10.3390/toxics12010047.

Full text
Abstract:
Emerging contaminants have been increasingly recognized as critical determinants in global public health outcomes. However, the intricate relationship between these contaminants and glucose metabolism remains to be fully elucidated. The paucity of comprehensive clinical data, coupled with the need for in-depth mechanistic investigations, underscores the urgency to decipher the precise molecular and cellular pathways through which these contaminants potentially mediate the initiation and progression of diabetes mellitus. A profound understanding of the epidemiological impact of these emerging contaminants, as well as the elucidation of the underlying mechanistic pathways, is indispensable for the formulation of evidence-based policy and preventive interventions. This review systematically aggregates contemporary findings from epidemiological investigations and delves into the mechanistic correlates that tether exposure to emerging contaminants, including endocrine disruptors, perfluorinated compounds, microplastics, and antibiotics, to glycemic dysregulation. A nuanced exploration is undertaken focusing on potential dietary sources and the consequential role of the gut microbiome in their toxic effects. This review endeavors to provide a foundational reference for future investigations into the complex interplay between emerging contaminants and diabetes mellitus.
APA, Harvard, Vancouver, ISO, and other styles
7

Кофман, В. Я. "On the meaning of the term «emerging contaminants»." Vodosnabzhenie i sanitarnaia tehnika, no. 5 (May 15, 2023): 56–60. http://dx.doi.org/10.35776/vst.2023.05.07.

Full text
Abstract:
Термин «emerging contaminants» получил широкое распространение в современной научно-технической литературе, посвященной проблематике загрязнения окружающей среды. Между тем примеры употребления вариантов перевода данного термина в русскоязычной профильной литературе свидетельствуют об отсутствии адекватного понимания значения данного термина. В англоязычной научно-технической литературе к «emerging contaminants» в настоящее время относят вещества и материалы природного, промышленного или искусственного происхождения, которые были обнаружены или предположительно присутствуют в различных средах, и токсичность или стабильность которых могут существенно изменить метаболизм живых существ. Такие вещества классифицируют как «emerging contaminants» до тех пор, пока в научной литературе существует недостаток информации или плохо документированы вопросы о связанных с ними потенциальных проблемах. В целом «emerging contaminants» демонстрируют определенный потенциал для создания рисков для здоровья человека или окружающей среды, но не подпадают пока под регулирующие критерии или нормы для защиты здоровья человека или окружающей среды. Общим для них является отсутствие соответствующих данных о месте в окружающей среде и потенциальной токсичности, что не позволяет правильно оценить связанные с ними риски. Уже регулируемые, предположительно хорошо известные загрязняющие вещества могут вновь обрести статус «emerging contaminants» по мере поступления новой научной информации, что послужит основанием для регулирующих органов пересмотреть свои нормы и рекомендации. The term «emerging contaminants» has been widely used in modern scientific and technical literature on the problem of environmental pollution. Meanwhile, the examples of using translation versions of this term in the Russian-language relevant literature indicate the lack of an adequate understanding of the meaning of this term. In the English-language scientific and technical literature «emerging contaminants» currently refer to the substances and materials of natural, industrial or artificial origin found or presumably present in various environments; and their toxicity or stability can significantly change the metabolism of living beings. These substances have been classified as «emerging contaminants» while there is a lack of information in the scientific literature, or questions about their potential problems have been poorly documented. In general, «emerging contaminants» show certain potential to create risks to the human health or environment; however, they have not been subject to regulatory criteria or standards to protect human health or the environment, so far. What they have in common is the lack of relevant data on the environmental role and potential toxicity, which makes assessing correctly the risks associated with them impossible. Already regulated, presumably well-known pollutants may revert to the status of «emerging contaminants» as and when new scientific information becomes available, prompting regulators to revise regulations and recommendations.
APA, Harvard, Vancouver, ISO, and other styles
8

Marasco Júnior, César Augusto, Natália Da Costa Luchiari, and Paulo Clairmont Feitosa Lima Gomes. "Occurrence of caffeine in wastewater and sewage and applied techniques for analysis: a review." Eclética Química Journal 44, no. 4 (October 1, 2019): 11. http://dx.doi.org/10.26850/1678-4618eqj.v44.4.2019.p11-26.

Full text
Abstract:
Emerging contaminants are substances found in the environment whose concentrations vary from µg to ng L-1 and whose presence in wastewater has gained popularity in the scientific community due to the potential impacts these compounds can cause to the environment. This designation concerns the lack of legislation to regulate their discharge or even to monitor these compounds. Moreover, emerging contaminants are capable of causing harmful effects to nontarget organisms and therefore affect the ecosystem balance. There are several compounds classified as emerging contaminants such as pharmaceuticals, illicit drugs, hormones, pesticides, among others. And among them, caffeine is considered an emerging contaminant and can be highlighted due its presence in medicines, beverages, foodstuff and several other products. In addition, it is a compound used worldwide recognized as a marker of anthropogenic activity. In this review, we present a discussion about emerging contaminants, focusing on caffeine, regulatory aspects that involve the theme, as well as effects on organisms, removal technologies and techniques for analyzing these compounds in environmental matrices.
APA, Harvard, Vancouver, ISO, and other styles
9

Kuskopf, Laura, Madoc Sheehan, and Anna Whelan. "Contaminants of Emerging Concern." Water e-Journal 5, no. 3 (2020): 1–28. http://dx.doi.org/10.21139/wej.2020.019.

Full text
Abstract:
There are potentially many thousands of municipally derived contaminants of emerging concern (CECs) present in discharged wastewaters that may cause adverse effects in receiving aquatic environments. Wastewater authorities, therefore, may face the momentous task of investigating these compounds with little or no prior CEC data for their sewage treatment plants (STPs). Such is the case for the Cleveland Bay Sewage Treatment Plant (CBSTP). To evaluate the potential environmental risk posed by municipal CECs, it is first necessary to understand which CECs are present in discharging wastewater, how they will be sampled and quantified, and which CECs are the most concerning regarding ecological risk. A Sampling Analysis and Quality Plan (SAQP) is a valuable tool that can be used to critically review and detail the strategy that will be adopted to achieve these outcomes. As such, this paper describes the development of a SAQP for screening wastewaters released from the CBSTP into Cleveland Bay as part of a preliminary CEC assessment. This paper describes the qualitative decision-making process employed to shortlist CECs into those perceived to pose the greatest ecological risk. In addition, the rationale and methods adopted to determine sampling locations and frequency are described.
APA, Harvard, Vancouver, ISO, and other styles
10

Barceló, Damià, and Mira Petrovic. "Emerging contaminants in wastewaters." TrAC Trends in Analytical Chemistry 26, no. 11 (December 2007): 1019. http://dx.doi.org/10.1016/j.trac.2007.10.006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Emerging contaminants"

1

Núñez, Marcé Mireia. "Emerging organic contaminants in aquatic organisms." Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/456825.

Full text
Abstract:
Aquesta Tesi Doctoral se centra en el desenvolupament de nous mètodes analítics per determinar diferents contaminants orgànics emergents, com ara productes farmacèutics de consum generalitzat, els medis iodat de contrast per a raigs-X (un altre grup de productes farmacèutics emprats en la medicina de diagnòstic), i un grup d'edulcorants d'alta intensitat en organismes aquàtics. Dues tècniques d'extracció (extracció mitjançant líquids pressuritzats i QuEChERS) van ser avaluades per extreure els compostos seleccionats i diferents neteges també van ser provades. La determinació es va realitzar mitjançant cromatografia de líquids acoblada a espectrometria de masses.D'altra banda, també es va dur a terme un estudi ecotoxicològic en l'espècie Gammarus pulex, on s' avaluà la toxicitat del triclosan en aquesta espècie i, a més a més, es van estudiar poblacions procedents de diferents ambients amb diferents graus de contaminació per determinar si la seva resistència era similar o no.
Esta tesis doctoral se centra en el desarrollo de nuevos métodos analíticos para determinar diferentes contaminantes orgánicos emergentes, como productos farmacéuticos de consumo generalizado, medios yodados de contraste para rayos-X (otro grupo de productos farmacéuticos empleados en medicina de diagnóstico) y un grupo de edulcorantes de alta intensidad en organismos acuáticos. Para ello se evaluaron dos técnicas de extracción (extracción con líquidos presurizados y QuEChERS) para extraer los compuestos seleccionados y también se ensayaron diferentes limpiezas. La determinación se realizó mediante cromatografía de líquidos acoplada a espectrometría de masas. Además, se realizó un estudio ecotoxicológico en la especie Gammarus pulex, donde se evaluó la toxicidad del triclosán para esta especie y, además, se estudiaron poblaciones procedentes de diferentes ambientes con diferentes grados de contaminación para determinar si su resistencia era similar o no.
This Doctoral Thesis focuses on the development of new analytical methods to determine different emerging organic contaminants such as pharmaceuticals of widespread consumption, iodinated X-ray contrast media (another group of pharmaceuticals employed in diagnostic medicine), and a group of high-intensity sweeteners, in aquatic organisms. To do so two extraction techniques (pressurised liquid extraction and QuEChERS) were evaluated to extract the selected compounds and different clean-ups were also tested. The determination was perfomed with liquid chromatography coupled with mass spectrometry. Moreover, another objective is to conduct an ecotoxicological study in the amphipod species Gammarus pulex, where the toxicity of triclosan to this species was evaluated. Moreover, populations that come from different environments with different degrees of pollution were evaluated in order to establish whether their resistance was similar or not.
APA, Harvard, Vancouver, ISO, and other styles
2

Nieto, Cebrián Antonio. "Emerging organic contaminants in sewage sludge." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/9048.

Full text
Abstract:
El objetivo de esta tesis es el desarrollo de métodos analíticos para la determinación de un grupo de contaminantes emergentes entre los cuales se incluyen los fármacos y los compuestos de cuidado personal en lodos de depuradora.
Los métodos desarrollados se basan en la extracción presurizada con solventes (PLE) y, debido a la polaridad de estos contaminantes, la cromatografia de líquidos. Como técnicas de detección se han utilizado la espectrometría de masas (con quadrupolo y tiempo de vuelo como analizadores) y la espectrometría de masas en tandem (con triple quadrupolo como analizador) utilizando la interfase de electrospray.
A parte del desarrollo de los métodos para la determinación de fármacos, hormonas y compuestos de cuidado personal, se han analizado muestras de dos plantas de tratamiento de aguas residuales de la zona de Tarragona. Se han obtenido resultados de la presencia de estos compuestos en lodos de depuradora que hasta la fecha no existían sobre las muestras de esta zona.
The scope of this thesis is to develop analytical methods to determine a group of pharmaceuticals and personal care products included in the list of so called "emerging organic contaminants".
The methods are based on pressurized liquid extraction as extraction technique and due to the polarities of these contaminants, liquid chromatography was the selected separation technique. Because the low concentration of these contaminants in sewage sludge, sensitive and selective detection technique have to be used such as mass spectrometry (with quadruople or time of flight analyzers) and tandem mass spectrometry (with triple quadrupole analyzer) using in all cases the electrospray interface.
The methods developed have been used to monitor several groups of pharmaceuticals and personal care products from sewage sludge from two different sewage treatment plants. The samples have been collected in Tarragona, where no studies related to the control of these compounds have been done.
APA, Harvard, Vancouver, ISO, and other styles
3

Andaluri, Gangadhar. "Ultrasound induced destruction of emerging contaminants." Diss., Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/111771.

Full text
Abstract:
Civil Engineering
Ph.D.
There are many reports indicating the presence of emerging contaminants such as: estrogen hormones, 1,4-dioxane and perfluoro-octanoic acids in the natural environment. Estrogen hormones are considered important emerging class of contaminants due to their endocrine disrupting effects. These compounds are invariably found in the environment originating mostly from natural sources. Trace concentrations of estrogen hormones (low µg/L concentrations) have been detected in municipal wastewater treatment plants and observed in receiving water bodies. 1,4-Dioxane (C4H8O2) is used as an organic solvent and solvent stabilizer numerous in chemical processes. The United States Environmental Protection Agency (US-EPA) has recognized 1,4-dioxane as a toxic chemical and a possible human carcinogen. 1,4-dioxane has been detected as a contaminant in the natural environment, drinking water supplies, superfund sites, public groundwater sources in the United States, Canada and Japan at concentrations greater than the permissible standards. Perfluorinated chemicals such as perfluoro-octanoic acid (PFOA) and perfluorooctane-sulfonate (PFOS) have been manufactured for use in a variety of industrial and consumer applications. Due to their environmental persistence, PFOAs have been detected in surface waters at a number of locations at concentrations ranging from pg/L to ng/L. Elevated concentrations of PFOAs have been measured in surface and ground waters near specific point sources. Through this project, successful attempts have been made for the destruction of emerging contaminants using ultrasound. This study deals with the optimization of various process parameters for the destruction of estrogen hormones. The influence of process parameters such as power density, reactor geometry, power intensity, ultrasound amplitude, and external mixing was investigated. Artificial neural network (ANN) approach was used to describe the interactions between optimized parameters. The important findings obtained in the present work for the optimized estrogen degradation can help tackle the challenges of scale up such as operational optimization and energy consumption. The effect of process conditions such as pH and presence of oxidizing agents on the ultrasonic destruction of 1,4-dioxane and PFOA was studied. Acidic conditions favored the destruction of both the compounds. The presence of activated sulfate radicals enhanced the reaction rate kinetics. An innovative technology using electric potential and ultrasound for the removal organic contaminants was developed. The existence of organic contaminants in ionic form under certain process conditions has led to the development of this technology. Applying a low electric potential across the probe enhances the mass transfer of the contaminants into effective reaction zone, thereby enhancing the total destruction. A two-fold increase in the reaction rates was observed. This study shows ultrasound as an efficient and effective treatment technology for the destruction of emerging contaminants.
Temple University--Theses
APA, Harvard, Vancouver, ISO, and other styles
4

Jiang, Yanan. "Emerging contaminants : environmental fate of artifical sweeteners." HKBU Institutional Repository, 2013. http://repository.hkbu.edu.hk/etd_ra/1508.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Borrull, Callau Josep. "Presència de compostos orgànics prioritaris i emergents en aigües destinades al consum humà." Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/671552.

Full text
Abstract:
Els contaminants orgànics són substàncies químiques amb el potencial de causar efectes adversos al medi ambient i/o a la salut humana. Degut a l’ús cada cop més elevat de substàncies químiques i la seva emissió continuada al medi ambient, aquestes es poden considerar com a pseudo-persistents, convertint en una prioritat el monitoratge de la seva presència al medi ambient. Un dels aspectes que està suscitant una major preocupació es el control dels contaminants orgànics al medi aquàtic, ja que pot afectar de manera significativa a la seva qualitat. En aquest sentit, l'objectiu principal d'aquesta Tesi es el desenvolupament de metodologia analítica basada en la cromatografía líquida acoblada a l'espectrometría de masses en tandem, utilitzant un analitzador de triple quadrupol, per a la determinació de certs contaminants orgànics, tant prioritàris com emergents, en mostres d'aigua. Un cop la metodologia ha estat desenvolupada i validada, ha estat aplicada a l'analisi de mostres d'aigua del riu Ebre i a mostres recollides en una ETAP. D'aquesta manera s'ha pogut avaluar la presència d'aquests contaminants en aquestes aigües, així com l'efectivitat dels diferents tractaments aplicats en aquesta ETAP per a l'eliminació d'aquests contaminants.
Los contaminantes orgánicos son sustancias químicas con el potencial de causar efectos adversos al medio ambiente y / o la salud humana. Debido al uso cada vez más elevado de sustancias químicas y su emisión continuada al medio ambiente, estas se pueden considerar como pseudo-persistentes, convirtiendo en una prioridad el monitoreo de su presencia en el medio ambiente. Uno de los aspectos que está suscitando una mayor preocupación es el control de los contaminantes orgánicos en el medio acuático, ya que puede afectar de manera significativa a su calidad. En este sentido, el objetivo principal de esta Tesis es el desarrollo de metodología analítica basada en la cromatografía líquida acoplada a la espectrometría de masas en tándem, utilizando un analizador de triple cuadrupolo, para la determinación de ciertos contaminantes orgánicos, tanto prioritarios como emergentes, en muestras de agua. Una vez la metodología ha sido desarrollada y validada, ha sido aplicada al análisis de muestras de agua del río Ebro y en muestras recogidas en una ETAP. De esta manera se ha podido evaluar la presencia de estos contaminantes en estas aguas, así como la efectividad de los diferentes tratamientos aplicados en esta ETAP para la eliminación de estos contaminantes.
Organic pollutants are chemicals with the potential to cause adverse effects to the environment and / or human health. Due to the increasing use of chemical substances and their continuous release into the environment, these can be considered as pseudo-persistent, making monitoring their presence in the environment a priority. One of the aspects that is causing the greatest concern is the control of organic pollutants in the aquatic environment, as it can significantly affect its quality. In this sense, the main objective of this Thesis is the development of analytical methodology based on liquid chromatography coupled to tandem mass spectrometry, using a triple quadrupole analyzer, for the determination of certain organic pollutants, both priority and emerging, in water samples. Once the methodology has been developed and validated, it has been applied to the analysis of water samples from the Ebro river and in samples collected in an ETAP. In this way, the presence of these pollutants in these waters has been evaluated, as well as the effectiveness of the different treatments applied in this ETAP for the elimination of these pollutants.
APA, Harvard, Vancouver, ISO, and other styles
6

Janna, Hussein. "Occurrence and removal of emerging contaminants in wastewaters." Thesis, Brunel University, 2011. http://bura.brunel.ac.uk/handle/2438/6097.

Full text
Abstract:
Over the past decade, the occurrence and removal of emerging contaminants in the environment has received much attention. Both natural and synthetic progestogens, which are hormones, and also benzotriazoles are two examples of such emerging contaminants. Sewage treatment works are recognised as one of the main routes of these compounds to the environment. Low concentrations (nanograms per litre) of biologically active chemicals may exhibit an impact on aquatic organisms and human health. This study was undertaken to determine the occurrence and removal of these two classes of chemicals at sewage treatment works, along with an evaluation of the performance of advanced treatment and also to investigate their fate in the aquatic environment. Therefore, field-based sampling campaigns were undertaken at a sewage treatment works, rivers and potable water to achieve these aims. Solid phase extraction and LC/MS/MS were used in order to analyse the samples from these different locations, along with catchment modelling and assessment of how the use of benzotriazoles may contribute to their presence in the environment. The results have demonstrated that progestogens and benzotriazoles are in the sewage system; the natural hormone (progesterone) was the most predominant compound entering the sewage treatment work (46.9 ng/l) among the progestogens while concentrations of the benzotriazoles were two orders of magnitude higher than the progestogens. The conventional sewage treatment works were, to some extent, able to remove these compounds from wastewaters. However, this may not be adequate to afford protection to the environment. The investigation of advanced treatments, ozone, granular activated carbon and chlorine dioxide, indicated no further significant removal of progestogens, probably as a result of concentrations being close to method detection limits. However, there were indications that benzotriazoles were removed. A degradation study demonstrated that the natural hormone (progesterone) was degraded rapidly while benzotriazoles were not degraded. Catchment modelling indicated that high (up to 2,000 ng/l) concentrations of benzotriazoles would be present in surface waters used for potable supply, and consequently benzotriazoles were found in the tap water with mean concentrations of 30.9 ng/l (benzotriazole) and 15.1 ng/l for tolyltriazole. It is therefore apparent that although conventional treatment may be seen as effective, achieving over 90% removal, this may not be good enough. However, before investing in tertiary treatment, a number of factors, such as the effectiveness at different sites, the presence of degradation products and costs, both financial and in relation to energy use, need to be considered.
APA, Harvard, Vancouver, ISO, and other styles
7

Giansiracusa, Sara. "Bioaccumulation of legacy and emerging contaminants in tuna species." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18305/.

Full text
Abstract:
Environmental contamination of legacy contaminants has been of great concern worldwide because of their persistence and toxicity to humans and marine species. Only in the last decade, the presence and accumulation of emerging contaminants, and, consequently, their adverse effects in marine biota have been considered. The present research was performed to compare the different distribution of legacy contaminants (Pesticides, PCBs and PAHs) and emerging contaminants (UV filters and Fragrances) in the liver and muscle tissues of three tuna species living in different locations and with different behaviour and feed habits: Sarda sarda, Katsuwonus pelamis from the Atlantic Ocean (Gulf of Càdiz) and Thunnus thynnus from the Strait of Gibraltar. The extraction and quantitative determination of these contaminants from liver and muscle samples have been carried out by Accelerate Solvent Extraction and GC-MS/MS techniques, respectively. From the statistical analysis, significant differences have been found for Fragrances, Pesticides, PCBs and PAHs both among the three tuna species and between the two tissues. Post-hoc analysis showed significant differences between the three tuna species and the tissues, revealing that K. pelamis species differs significantly from the other two species, both in liver and muscle, and that legacy contaminants are responsible for significant differences between and within species. We also explored the similarities between concentrations of PCBs and DDTs in liver and muscle tissue found in samples of T. thynnus and K. pelamis in this study, compared to concentrations of PCBs and DDTs found in specimens of tuna collected in different geographical areas. As a result of the continuous exposure of the marine top predators, such as tuna species, to variable concentrations of emerging and legacy contaminants, their concentration in the marine environment must be constantly monitored.
APA, Harvard, Vancouver, ISO, and other styles
8

Simhon, Michal Vered. "The fate of emerging contaminants in wastewater treatment plants." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45707.

Full text
Abstract:
Potential risk and toxicity of emerging contaminants (ECs) on the human population and the surrounding ecosystem have led to growing concern in the scientific world. This class of contaminants includes a variety of commonly used compounds such as pharmaceuticals and personal care products, as well as industry-based compounds such as surfactants and plasticizers. There are many challenges involved when studying these contaminants with the most apparent one relating to the lack of a standardized analytical method. As a result, this research investigated and optimized an analytical method for the determination of selected EC compounds in the soluble and particulate fractions of samples collected from the wastewater treatment pilot plant located at the University of British Columbia, Vancouver, Canada. Once the method was optimized, the effects of hydraulic retention time (HRT) and solids retention time (SRT) on the fate of ECs through the wastewater treatment process were studied using the UBC membrane biological nutrient removal pilot plant. The study involving the HRT failed to provide sufficient evidence to adequately assess the observed effects, since an inadequate quantity of each contaminant was spiked into the pilot plant. However, the spiking quantity was adjusted for the individual contaminants based on these observations, enabling the effect of the SRT to be studied. All analytes exhibited one of two trends during the mass balance analysis. For all of the EC compounds that were studied, sorption to the mixed liquor particulates and washout in the effluent were not the only removal mechanisms in the experimental system of the UBC pilot plant.
APA, Harvard, Vancouver, ISO, and other styles
9

Kusi, Joseph, Phillip Robert Scheuerman, and Kurt J. Maier. "Silver Nanoparticles: Emerging Environmental Contaminants in the Aquatic System." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/asrf/2018/schedule/94.

Full text
Abstract:
Silver nanoparticles (AgNPs) are tiny particles of silver with nanoscale dimensions (between 1 and 100 nm) and unique antimicrobial properties. AgNPs are potential environmental contaminants increasingly applied in consumer products. The effects on nontarget biological systems are not clearly defined. Research has shown that AgNPs may inhibit the function of bacteria responsible for organic matter decomposition, nutrient cycling, and control of pathogens population in the aquatic system. AgNPs have recently been detected in a treated municipal wastewater raising concerns about their potential risk to aquatic organisms. The microbial community in the sediment has a greater risk of AgNPs exposure, as metals in aquatic systems settle in the sediment. Studies have shown that microbial community growth and carbon sources utilization patterns were altered in response to AgNPs exposure in marine estuarine sediments. The antimicrobial activity of AgNPs in freshwater sediments may be different due to the water chemistry. Few studies have evaluated the toxicity of AgNPs in freshwater sediments due to the complex nature of their water chemistry. The current study investigated microbial community’s responses to AgNPs in sediments collected from a local stream. Microbial growth and activity assays were performed to determine whether AgNPs pose a risk to the microbial community in freshwater sediments. We found that AgNPs inhibited microbial growth, enzyme activity, and catabolic capabilities (P < 0.05). The number of viable bacterial cells and the ability of the microbial community to utilize different carbon sources decreased at 0.431 and 0.538 mg AgNPs kg-1 sediment, which are found within the estimated AgNPs concentration range in sediments. AgNPs inhibited the activity of glucosidase, an enzyme responsible for carbohydrate metabolism, but the activity of alkaline phosphatase was not affected. The current study demonstrates that AgNPs can inhibit the growth and functional diversity of beneficial microorganisms, which may affect the quality of surface waters and their designated uses. These adverse effects are expected due to the demonstrated antimicrobial properties of AgNPs incorporated in several commercial products. Toxicological data generated from this study could be incorporated in ecological risk assessment by regulatory agencies to assess the impacts of AgNPs on ecosystem systems.
APA, Harvard, Vancouver, ISO, and other styles
10

Ghelli, Elisa <1991&gt. "Investigation on emerging contaminants in foods of animal origin." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9937/1/Tesi%20di%20Dottorato%20-%20Elisa%20Ghelli%20-.pdf.

Full text
Abstract:
In recent years there has been a growing interest from the scientific community in contaminants of emerging concern which include a large group of currently unmonitored chemicals, such as PFAS and DRCs, which are released from human activities and accumulate in the environment and in the food chain causing potentially dangerous damage to health. The aim of this thesis was to determining the levels of PFAS in commercial and domestic Italian eggs, and DRCs in different food samples purchased from Italian and French large-scale retailers. The results show PFAS contamination at much higher levels in domestic eggs then commercial eggs. This can be explained by the fact that hens that live outdoors and have the possibility to scratch in the soil, are more exposed to these substances compared to hens raised in industrial systems. Regarding DRCs contamination the procedural contamination encountered during the analysis of the samples led to an underestimation of the real values of contamination. Despite this, for both France and Italy, the food category most contaminated by DRCs was that of fish and seafood. The Italian samples showed DP contamination also in meat and eggs, and in eggs at levels higher than all other food categories considered. From the comparison with the reported works, it emerged that eggs, after fish, have the highest average levels of DP. This, added to the results obtained for PFAS on eggs, highlights how eggs are also an important source of food exposure to emerging contaminants. In conclusion, the general trend also confirmed by the available literature, shows that one of the main sources of dietary exposure for humans to some classes of emerging contaminants are fish products, to which the category of eggs is also added, as has been shown a source of exposure not to be underestimate.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Emerging contaminants"

1

Bell, Caitlin H., Margaret Gentile, Erica Kalve, Ian Ross, John Horst, and Suthan Suthersan, eds. Emerging Contaminants Handbook. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22226.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Morin-Crini, Nadia, Eric Lichtfouse, and Grégorio Crini, eds. Emerging Contaminants Vol. 1. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69079-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Morin-Crini, Nadia, Eric Lichtfouse, and Grégorio Crini, eds. Emerging Contaminants Vol. 2. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-69090-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Aftab, Tariq, ed. Emerging Contaminants and Plants. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-22269-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Petrovic, Mira, Sergi Sabater, Arturo Elosegi, and Damià Barceló, eds. Emerging Contaminants in River Ecosystems. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29376-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Vicent, Teresa, Glòria Caminal, Ethel Eljarrat, and Damià Barceló, eds. Emerging Organic Contaminants in Sludges. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-35609-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wagner, Martin. Freshwater Microplastics: Emerging Environmental Contaminants? Cham: Springer Nature, 2018.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Alok, Bhandari, Environmental Council of the States (U.S.). Emerging Contaminants of Concern Task Commitee., and Environmental and Water Resources Institute (U.S.), eds. Contaminants of emerging environmental concern. Reston, Va: American Society of Civil Engineers, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

P. Singh, Swatantra, Avinash Kumar Agarwal, Tarun Gupta, and Shihabudheen M. Maliyekkal, eds. New Trends in Emerging Environmental Contaminants. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-8367-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Barceló, Damià, ed. Emerging Organic Contaminants and Human Health. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28132-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Emerging contaminants"

1

Turan, Nouha Bakaraki, Hanife Sari Erkan, and Guleda Onkal Engin. "Emerging Contaminants." In Advanced Oxidation Processes for Wastewater Treatment, 27–37. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003165958-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Mortimer, Munro, and Graeme Batley. "Marine Contaminants of Emerging Concern." In Springer Textbooks in Earth Sciences, Geography and Environment, 285–303. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-10127-4_13.

Full text
Abstract:
AbstractIdentifying and listing substances or materials as contaminants of emerging concern(CECs) is not a simple task, and for the marine environment specifically is a challenge for environmental regulators, managers and researchers worldwide (Box 13.1) (Tornero V, and Hanke G (2017) Potential chemical contaminants in the marine environment: An overview of main contaminant lists. Office of the European Union Publications, Luxembourg. Available at: http://publications.jrc.ec.europa.eu/repository/bitstream/JRC108964/potential_chemical_contaminants_in_the_marine.pdf [Accessed 19 August2019].). Some of these agencies have widely different definitions of what a CEC actually is (Halden J Hazard Mater 282:2–9, 2015).
APA, Harvard, Vancouver, ISO, and other styles
3

Stuart, Emma J. E., and Richard G. Compton. "Nanoparticles-Emerging Contaminants." In Environmental Analysis by Electrochemical Sensors and Biosensors, 855–78. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1301-5_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Datta, Shreeja, Arpita Roy, and Suresh Ghotekar. "Emerging groundwater contaminants." In Legacy, Pathogenic and Emerging Contaminants in the Environment, 99–124. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003157465-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Bell, Caitlin H., and Paul Anderson. "Introduction to Emerging Contaminants." In Emerging Contaminants Handbook, edited by John Horst, 1–26. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22226-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Bell, Caitlin H., and Norman D. Forsberg. "1,4-Dioxane." In Emerging Contaminants Handbook, 27–84. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22226-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

McDonough, Jeff, Jake Hurst, Jonathan A. L. Miles, and Tessa Pancras. "Per- and Polyfluoroalkyl Substances." In Emerging Contaminants Handbook, edited by Ian Ross and Erica Kalve, 85–262. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22226-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Imamura, Greg, and Brent Alspach. "Hexavalent Chromium." In Emerging Contaminants Handbook, edited by Margaret Gentile, 263–314. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22226-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Justicia-Leon, Shandra, and Sarah Page. "1,2,3-Trichloropropane." In Emerging Contaminants Handbook, edited by Margaret Gentile, 315–54. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22226-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Bell, Caitlin H., Paul Anderson, and Norman Forsberg. "Considerations for Future Contaminants of Emerging Concern." In Emerging Contaminants Handbook, edited by John Horst, 355–72. Boca Raton : Taylor & Francis, a CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa, plc, 2018.: CRC Press, 2019. http://dx.doi.org/10.1201/b22226-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Emerging contaminants"

1

Heinlaan, Margit, Heiki Vija, and Irina Blinova. "Novel Plasticizers Are Emerging Contaminants." In International Conference EcoBalt. Basel Switzerland: MDPI, 2023. http://dx.doi.org/10.3390/proceedings2023092061.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Liu, Yanghe, Chenguang Sheng, and George Agbai Nnanna. "Detection of Selected Pharmaceutical Contaminants and Removal Efficiency of Emerging Contaminants by Application of Membrane Filtration Technology." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36906.

Full text
Abstract:
Removal of emerging contaminants is considered to be one of the most important processes within advanced Waste Water Treatment Plants (WWTPs) system. Pharmaceutical contaminants in drinking water could potentially lead to human’s increasing risks of heart attacks, organ damage, mental health and even cancer. This paper investigates the emerging contaminant removal efficiencies of technologies employed by local WWTPs. After determining the presence of selected emerging contaminants (17β-estradiol, Acetaminophen, Carbamazepine, Diclofenac, Erythromycin, Estrone, Bezafibrate, Fluoxetine, Gemfibrozil, Ibuprofen, Lincomycin, Metoprolol, Naproxen, Ofloxacin, Sulfamethoxazole and Triclosan) in the waterbodies within the watershed of Lake Michigan in Northwest Indiana (NWI). Three of the contaminants above are chosen for lab experiments by considering their effects on human’s health and environment. A membrane filtration experiment is conducted in Purdue Water Institute (PWI) as preliminary studies on the removal of selected emerging contaminants. Meanwhile, application of Powdered Activated Carbon (PAC) and simulation of coagulation/flocculation are designed as combined experiment with membrane filtration for evaluation of feasibility of using these techniques.
APA, Harvard, Vancouver, ISO, and other styles
3

Bekins, Barbara A., Isabelle M. Cozzarelli, Melinda L. Erickson, Ross A. Steenson, and Kevin A. Thorn. "ARE CRUDE OIL METABOLITES EMERGING CONTAMINANTS?" In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-282491.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Yang, Dian, Yongxin Zhu, Tian Huang, Yiliang He, and Stephane Bressan. "A Provenance Scheme for Emerging Water Contaminants." In 2015 17th UKSim-AMSS International Conference on Modelling and Simulation (UKSim). IEEE, 2015. http://dx.doi.org/10.1109/uksim.2015.15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Pei, Ruoting, Heather Storteboom, and Amy Pruden. "Antibiotic Resistance Genes (ARG) as Emerging Environmental Contaminants." In World Environmental and Water Resources Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40856(200)97.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

"EMERGING ENVIRONMENTAL CONTAMINANTS: CURRENT SCIENCE AND POLICY CONCERNS." In Animal Agriculture and the Environment, National Center for Manure & Animal Waste Management White Papers . St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2006. http://dx.doi.org/10.13031/2013.20253.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Parmer, Emma, Charlotte Jannach, Natalia Malina, and Ann Ojeda. "QUANTIFYING EMERGING CONTAMINANTS IN PARKERSON MILL CREEK, ALABAMA." In Southeastern Section-70th Annual Meeting-2021. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021se-362346.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Nguyen, Don. "Emerging Technologies for Treating Contaminants in Marine Wastewater." In ASME/USCG 2010 2nd Workshop on Marine Technology and Standards. American Society of Mechanical Engineers, 2010. http://dx.doi.org/10.1115/mts2010-0207.

Full text
Abstract:
Contaminants in marine wastewater facing current or near-future regulations can be broadly categorized to free oil & suspended solids, emulsified oil and dissolved solids, and biological organisms. The first category of contaminants has been treated by commercially available OWS systems. The second class of contaminants, emulsified oils and dissolved solids, has been effectively treated by UF membrane filtration and to a less extent by biological oxidation and surface modified filters. A survey of recent advances in physical and chemical demulsification technologies to enhance emulsified oil removal with reduced loads on membrane was conducted. The study also identified new applications for treatments of biological organisms in ballast water. Paper published with permission.
APA, Harvard, Vancouver, ISO, and other styles
9

de Freitas Lima, Edilaine, CASSIANA CAROLINA MONTAGNER RAIMUNDO, Romeu Cantusio Neto, and David Klein. "Removal of Emerging Contaminants in Wastewater Reclamation Plant." In XXV Congresso de Iniciação Cientifica da Unicamp. Campinas - SP, Brazil: Galoa, 2017. http://dx.doi.org/10.19146/pibic-2017-78332.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Rizzi, Vito, Jennifer Gubitosa, Angela Agostiano, Francesco Trotta, Paola Fini, and Pinalysa Cosma. "Recyclable Cyclodextrin Nanosponges for the Removal of Emerging Contaminants." In The 8th World Congress on New Technologies. Avestia Publishing, 2022. http://dx.doi.org/10.11159/icepr22.124.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Emerging contaminants"

1

Alvarez-Cohen, Lisa, Ariel Grostern, Rebecca Parales, and Yinjie Tang. Oxygenase-Catalyzed Biodegradation of Emerging Water Contaminants: 1,4-Dioxane and N-Nitrosodimethylamine. Fort Belvoir, VA: Defense Technical Information Center, February 2012. http://dx.doi.org/10.21236/ada579927.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Libra, Robert D., Claire E. Hruby, Chad L. Fields, Dana W. Kolpin, Laura E. Hubbard, Michael D. Schueller, Mark R. Borchardt, et al. 2013 Survey of Iowa groundwater and evaluation of public well vulnerability classifications for contaminants of emerging concern. Iowa City, Iowa: Iowa Department of Natural Resources, May 2015. http://dx.doi.org/10.17077/rep.006544.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Gul, Ikhtiar, and Murtaza Sayed. A novel prototype photoreactor for the removal of emerging contaminants from industrial sewage through solar-driven photocatalysis. Peeref, April 2023. http://dx.doi.org/10.54985/peeref.2304p1197879.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ballentine, Mark, Alan Kennedy, Nicholas Melby, Andrew McQueen, Christopher Griggs, and Ashley Kimble. Approach for on-site, on-demand contaminant-removal devices enabled by low-cost 3D printing. Engineer Research and Development Center (U.S.), March 2024. http://dx.doi.org/10.21079/11681/48353.

Full text
Abstract:
The purpose of this technical note is to disseminate methods to design and create a 3D device that could be used to determine relative toxicity potential of existing and emerging contaminants of concern in situ for sediment shoaled in federal navigation channels prior to being dredged. This device has the potential to reduce the cost of conventional sediment evaluations conducted prior to dredging operations.
APA, Harvard, Vancouver, ISO, and other styles
5

U., Stony. Application of electron beam technology to decompose persistent emerging drinking water contaminants: poly- and perfluoroalkyl substances (PFAS) and 1,4 dioxane. Office of Scientific and Technical Information (OSTI), April 2023. http://dx.doi.org/10.2172/1970494.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Venkatesan, Arjun, Charlie Cooper, Kaushik Londhe, Cheng-Shiuan Lee, and Slavica Grdanovska. Application of electron beam technology to decompose persistent emerging drinking water contaminants: poly- and perfluoroalkyl substances (PFAS) and 1,4-Dioxane. Office of Scientific and Technical Information (OSTI), December 2021. http://dx.doi.org/10.2172/1837061.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Yaroschak, P. J. Emerging Contaminant Program: Program Update. Fort Belvoir, VA: Defense Technical Information Center, December 2010. http://dx.doi.org/10.21236/ada552023.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Lehotay, Steven J., and Aviv Amirav. Ultra-Fast Methods and Instrumentation for the Analysis of Hazardous Chemicals in the Food Supply. United States Department of Agriculture, December 2012. http://dx.doi.org/10.32747/2012.7699852.bard.

Full text
Abstract:
Original proposal objectives: Our main original goal was to develop ultra-fast methods and instrumentation for the analysis of hazardous chemicals in the food supply. We proposed to extend the QuEChERS approach to veterinary drugs and other contaminants, and conduct fast and ultra-fast analyses using novel 5MB-MS instrumentation, ideally with real samples. Background to the topic: The international trade of agricultural food products is a $1.2 trill ion annual market and growing. Food safety is essential to human health, and chemical residue limits are legislated nationally and internationally. Analytical testing for residues is needed to conduct risk assessments and regulatory enforcement actions to ensure food safety and environmental health, among other important needs. Current monitoring methods are better than ever, but they are still too time-consuming, laborious, and expensive to meet the broad food testing needs of consumers, government, and industry. As a result, costs are high and only a tiny fraction of the food is tested for a limited number of contaminants. We need affordable, ultra-fast methods that attain high quality results for a wide range of chemicals. Major conclusions, solutions and achievements: This is the third BARD grant shared between Prof. Amirav and Dr. Lehotay since 2000, and continual analytical improvements have been made in terms of speed, sample throughput, chemical scope, ease-of-use, and quality of results with respect to qualitative (screening and identification) and quantitative factors. The QuEChERS sample preparation approach, which was developed in conjunction with the BARD grant in 2002, has grown to currently become the most common pesticide residue method in the world. BARD funding has been instrumental to help Dr. Lehotay make refinements and expand QuEChERS concepts to additional applications, which has led to the commercialization of QuEChERS products by more than 20 companies worldwide. During the past 3 years, QuEChERS has been applied to multiclass, multiresidue analysis of veterinary drug residues in food animals, and it has been validated and implemented by USDA-FSIS. QuEChERS was also modified and validated for faster, easier, and better analysis of traditional and emerging environmental contaminants in food. Meanwhile, Prof. Amirav has commercialized the GC-MS with 5MB technology and other independent inventions, including the ChromatoProbe with Agilent, Bruker, and FUR Systems. A new method was developed for obtaining truly universal pesticide analysis, based on the use of GC-MS with 5MB. This method and instrument enables faster analysis with lower LaDs for extended range of pesticides and hazardous compounds. A new approach and device of Open Probe Fast GC-MS with 5MB was also developed that enable real time screening of limited number of target pesticides. Implications, both scientific and agricultural: We succeeded in achieving significant improvements in the analysis of hazardous chemicals in the food supply, from easy sample preparation approaches, through sample analysis by advanced new types of GC-MS and LCMS techniques, all the way to improved data analysis by lowering LaD and providing greater confidence in chemical identification. As a result, the combination of the QuEChERS approach, new and superior instrumentation, and the novel monitoring methods that were developed will enable vastly reduced time and cost of analysis, increased analytical scope. and a higher monitoring rate. This provides better enforcement, an added impetus for farmers to use good agricultural practices, improved food safety and security, increased trade. and greater consumer confidence in the food supply.
APA, Harvard, Vancouver, ISO, and other styles
9

Desbarats, A. J., and J. B. Percival. Hydrogeochemistry of mine tailings from a carbonatite-hosted Nb-REE deposit, Oka, Quebec, Canada. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331256.

Full text
Abstract:
Environmental impacts associated with the mining of carbonatite deposits are an emerging concern due to the demand for critical metals. This study investigates the chemistry of tailings seepage at the former Saint Lawrence Columbium mine near Oka, Québec, Canada, which produced pyrochlore concentrate and ferroniobium from a carbonatite-hosted Nb-REE deposit. Its objectives are to characterize the mineralogy of the tailings and their pore water and effluent chemistries. Geochemical mass balance modeling, constrained by aqueous speciation modeling and mineralogy, is then used to identify reactions controlling the chemical evolution of pore water along its flow path through the tailings impoundment. The tailings are composed mainly of REE-enriched calcite (82 wt. %), biotite (12 wt. %) and fluorapatite (4 wt. %). Minor minerals include chlorite, pyrite, sphalerite, molybdenite and unrecovered pyrochlore. Secondary minerals include gypsum, barite and strontianite. Within the unsaturated zone, pore water chemistry is controlled by sulfide oxidation and calcite dissolution with acid neutralization. With increasing depth below the water table, pore water composition reflects gypsum dissolution followed by sulfate reduction and FeS precipitation driven by the oxidation of organic carbon in the tailings. Concomitantly, incongruent dissolution of biotite and chlorite releases K, Mg, Fe, Mn, Ba and F, forming kaolinite and Ca-smectite. Cation exchange reactions further remove Ca from solution, increasing concentrations of Na and K. Fluoride concentrations reach 23 mg/L and 8 mg/L in tailings pore water and effluent, respectively. At a pH of 8.3, Mo is highly mobile and reaches an average concentration of 83 µg/L in tailings effluent. Although U also forms mobile complexes, concentrations do not exceed 16 µg/L due to the low solubility of its pyrochlore host. Adsorption and the low solubility of pyrochlore limit concentrations of Nb to less than 49 µg/L. Cerium, from calcite dissolution, is strongly adsorbed although it reaches concentrations (unfiltered) in excess of 1 mg/L and 100 µg/L in pore water and effluent, respectively. Mine tailings from carbonatite deposits are enriched in a variety of incompatible elements with mineral hosts of varying reactivity. Some of these elements, such as F and Mo, may represent contaminants of concern because of their mobility in alkaline tailings waters.
APA, Harvard, Vancouver, ISO, and other styles
10

Barker, Amanda, Jay Clausen, Thomas Douglas, Anthony Bednar, Christopher Griggs, and William Martin. Environmental impact of metals resulting from military training activities : a review. Engineer Research and Development Center (U.S.), February 2022. http://dx.doi.org/10.21079/11681/43348.

Full text
Abstract:
The deposition of metals into the environment as a result of military training activities remains a longterm concern for Defense organizations across the globe. Of particular concern for deposition and potential mobilization are antimony (Sb), arsenic (As), copper (Cu), lead (Pb), and tungsten (W), which are the focus of this review article. The fate, transport, and mobilization of these metals are complicated and depend on a variety of environmental factors that are often convoluted, heterogeneous, and site dependent. While there have been many studies investigating contaminant mobilization on military training lands there exists a lack of cohesiveness surrounding the current state of knowledge for these five metals. The focus of this review article is to compile the current knowledge of the fate, transport, and ultimate risks presented by metals associated with different military training activities particularly as a result of small arms training activities, artillery/mortar ranges, battleruns, rocket ranges, and grenade courts. From there, we discuss emerging research results and finish with suggestions of where future research efforts and training range designs could be focused toward further reducing the deposition, limiting the migration, and decreasing risks presented by metals in the environment. Additionally, information presented here may offer insights into Sb, As, Cu, Pb, and W in other environmental settings.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Emerging contaminants' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography