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Dissertations / Theses on the topic 'Water pH'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Botfield, Andrew Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Kinetic modelling studies of As(III) oxidation in dark pH 3 and 8 Fenton - mediated and pH 8 Cu(II) - H2O2 systems." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2006. http://handle.unsw.edu.au/1959.4/31969.

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In this thesis, a combination of laboratory experimentation under well defined conditions coupled with a kinetic modelling approach is used to verify the existence and respective kinetic rates of previously unconfirmed or postulated mechanisms that drive and limit dark Fenton (Fe(II)/H2O2) - mediated As(III) oxidation at pH 3 and 8 and dark Cu(II) - H2O2 - mediated As(III) oxidation at pH 8. Dark Fenton - mediated oxidation of As(III) at pH 3 is first examined and the effects of the variation in the concentration of reactants (As(III), Fe(II) and H2O2), oxygen, phosphate and organics (2 - prop

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2

Bohn, Hinrich L., Henry Schreiber, and Loel R. Cooper. "Rainfall pH in Tombstone, Arizona, 1968-81." Arizona-Nevada Academy of Science, 1986. http://hdl.handle.net/10150/296369.

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From the Proceedings of the 1986 Meetings of the Arizona Section - American Water Resources Association, Hydrology Section - Arizona-Nevada Academy of Science and the Arizona Hydrological Society - April 19, 1986, Glendale Community College, Glendale, Arizona<br>Rainfall pH was measured at the Tombstone, Arizona, USDA-ARS station from 1968 to 1981. The summer rains were more acidic than the winter rains. The pH of the summer rains was about pH 5, the winter rains about pH 6, with considerable variation. The summer rain pH increased gradually over this period, coinciding with a general decrease

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3

Baker, Paul B. "Influence of pH 11 Water on Termiticide Degradation in Arizona." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/216349.

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Termites continue to be Arizona’s number one urban pest. Factors that influence the persistence of termiticides are constantly under investigation. High pH has been identified as a potential concern for persistence in termiticides. I studied the influence of pH 11 water on five termiticides applied to commercial ABC fill 10 months post-treatment. In general, the addition of pH 11 water had little influence on termiticide persistence under Arizona conditions. Initially plots treated with Ph 11 water had higher residues than those that did not receive the treated water; over time these differenc

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4

Gorshkova, M. Yr, I. V. Volkova, E. S. Grigorian, and V. A. Izumrudov. "Polyelectrolyte Nanocomplexes with pH-controlled Solubility." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35468.

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The prepared polyelectrolyte complexes of anionic copolymer of divinyl ester and maleic anhydride and cationic water soluble chitosan proved to be able to undergo reversible phase transition, in particular at physiological pH and ionic strength. Formation of either soluble or insoluble complexes occurred depending on pH value, charge ratio and degree of polymerization of the polymers. The stability of positively or negatively charged complexes against destruction action of the added salt drastically increased in acidic media presumably owing to H-bonds formation. According to light-scatte

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5

de, la Haye Kate. "The behavioural consequences of reduced sea water pH in decapod crustaceans." Thesis, University of Plymouth, 2012. http://hdl.handle.net/10026.1/1028.

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The studies presented in this thesis were designed to investigate the effects of reduced sea water pH on the behaviour of intertidal decapod crustaceans, both within the context of the variations occurring naturally in the pH of rock pool habitats, and in relation to predicted changes to ocean pH resulting from ocean acidification and potential carbon dioxide (CO2) leaks from carbon capture storage (CCS) sites. Recent studies on marine fish have shown behavioural disruptions as a result of increased CO2 concentrations in sea water and reduced pH, but the effects on crustaceans are as yet unkno

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6

Watker, A. F. "A study into the alteration of pH through water distribution systems." Thesis, University of Glasgow, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381109.

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7

Williams, N. L., L. W. Juranek, K. S. Johnson, et al. "Empirical algorithms to estimate water column pH in the Southern Ocean." AMER GEOPHYSICAL UNION, 2016. http://hdl.handle.net/10150/614732.

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Empirical algorithms are developed using high-quality GO-SHIP hydrographic measurements of commonly measured parameters (temperature, salinity, pressure, nitrate, and oxygen) that estimate pH in the Pacific sector of the Southern Ocean. The coefficients of determination, R-2, are 0.98 for pH from nitrate (pH(N)) and 0.97 for pH from oxygen (pH(Ox)) with RMS errors of 0.010 and 0.008, respectively. These algorithms are applied to Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) biogeochemical profiling floats, which include novel sensors (pH, nitrate, oxygen, fluorescence, a

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8

Fürtjes, Theresa Verfasser], and Stephan [Akademischer Betreuer] [Schreml. "Impact of a pH 5 Oil-in-Water (O/W) Emulsion on Skin Surface pH / Theresa Fürtjes ; Betreuer: Stephan Schreml." Regensburg : Universitätsbibliothek Regensburg, 2018. http://nbn-resolving.de/urn:nbn:de:bvb:355-epub-367214.

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9

Fürtjes, Theresa [Verfasser], and Stephan [Akademischer Betreuer] Schreml. "Impact of a pH 5 Oil-in-Water (O/W) Emulsion on Skin Surface pH / Theresa Fürtjes ; Betreuer: Stephan Schreml." Regensburg : Universitätsbibliothek Regensburg, 2018. http://d-nb.info/1152437542/34.

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10

Grant, Annie, and Ingrid Luffman. "IS WATER QUALITY IN BOONE LAKE A DAM PROBLEM? AN ASSESSMENT OF WATER QUALITY PRE- AND POST- DRAWDOWN." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/asrf/2018/schedule/115.

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Boone Lake was formed in 1952 by the impoundment of the South Fork Holston River in Sullivan and Washington counties, TN. The “V” shaped lake spans 6.88 square miles; it consists of two primary tributaries of approximately equal-length which meet just above the dam. South Fork Holston River makes up the northern arm and Watauga River feeds the southern arm. In October 2014, the discovery of a sinkhole led to detection of sediment-laden seepage under the earthen part of the dam. As a safety precaution, the reservoir was immediately lowered to an elevation of 1,352.5 feet, 10 feet below operatio

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11

Ye, Xuemin. "The effect of water pH on swimming performance, blood pH, red cell pH, ion concentrations and catecholamine concentrations in plasma, and gill potential in rainbow trout (Salmo gairdneri)." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26676.

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The effect of transferring fish from water at pH 7.0 to either more acid or more alkaline conditions was to reduce the maximum critical velocity of the fish. In water of pH 4.0, 5.0, and 10.0, the maximum critical velocity was only 54.5%, 66.5%, and 61% respectively of that recorded for fish in the water of pH 7.0. Thus, both acid and alkaline conditions in the water reduce the aerobic swimming capacity of trout. Exposure to acid conditions increased mucus secretion and this was associated with an increase in coughing and breathing frequency in resting fish. Coughing rate increased from 41/hr

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12

Sardarinejad, Ali. "Nano-engineered RuO2-based pH sensors." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2016. https://ro.ecu.edu.au/theses/1773.

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pH sensors are broadly used in chemical and biological applications. Example, Metal oxide-based pH sensors have many appealing features that include chemical resistance, insolubility, stability, outstanding mechanical strength, electrocatalyst and manufacturing technology. This thesis focuses on recent pH measurement techniques which incorporate miniaturization and optimization of the sensor and fabrication with super Nerstian pH sensitive materials. Such sensors have high sensitivity, fast response, excellent corrosion resistance, wide detection range, low hysteresis, long-term stability and

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13

Al-Ayed, M. I. M. "Studies on the effects of pH, aluminium and water hardness on Asellus aquaticus." Thesis, Swansea University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635656.

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In the present study, the interactive effects of Al<SUP>3+</SUP>, Ca<SUP>++</SUP> and pH on adult <i>Asellus aquaticus</i> (L.) were investigated. These animals were selected because of their possible usefulness as an indicator species. Results confirmed that there is a higher mortality and death occurs more rapidly at lower pH values. The effects of aluminium on longevity in <i>A. aquaticus</i> were investigated at two temperatures; generally, they survived less well at 18°C than at 11°C. Al<SUP>3+</SUP> had a noticeable effect on oxygen consumption in test specimens and acclimation to Al<SUP

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14

Miller, Stephanie A. "Investigation of Lead Solubility and Orthophosphate Addition in High pH Low DIC Water." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1406821208.

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15

La, Rosa Angelo <1988&gt. "EFFECT OF PH AND MONOVALENT CATIONS ON THE RAMAN SPECTRUM OF WATER AT WATER/SOLID INTERFACE IN SI3N4 BIOMATERIAL." Master's Degree Thesis, Università Ca' Foscari Venezia, 2015. http://hdl.handle.net/10579/6668.

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The effect of hydrogen carbonate (HCO3-) ions and monovalent cations (Na+, K+) solvated in water have been studied according to high spectrally resolved Raman measurements. Water solutions with different bicarbonate concentrations or added with increasing amounts of monovalent cations were examined with respect to their Raman spectra both in the bulk state and at the solid/liquid interface with a silicon nitride (Si3N4) bioceramic.

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16

Enetjärn, Albin. "Temporal och spatial variation för pH och relaterade parametrar i Bastuån, Jämtland." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-153162.

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Anthropogenic emissions of acidifying substances, mainly sulfur dioxide, during the second half of the 20th century caused a widespread acidification of many European freshwater environments. Even relatively remote areas, such as inland northern Sweden, experienced reduced pH-values, much due to low buffering capacity in the environment. Extensive liming has taken place in Sweden over the past fifty years to counteract negative effects on limnic ecosystems. Despite a general increase in pH over the last decades, problems with acidification still occur. However, this can be hard to separate fro

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17

Obut, Salih. "Control Of Ph In Neutralization Reactor Of A Waste Water Treatment System Using Identification Reactor." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606395/index.pdf.

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A typical wastewater effluent of a chemical process can contain several strong acids/bases, weak acids/bases as well as their salts. They must be neutralized before being discharged to the environment in order to protect aquatic life and human welfare. However, neutralization process is highly non&ndash<br>linear and has time&ndash<br>varying characteristics. Therefore, the control of pH is a challenging problem where advanced control strategies are often considered. In this study, the aim is to design a pH control system that will be capable of controlling the pH-value of a plant waste-water

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18

Lonergan, Sean P. "Macroinvertebrate community responses to acidification : isolating the effects of pH from other water chemistry variables." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=68205.

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The effect of lake acidification was evaluated, in the field, in terms of its impact on both the structural and functional composition of the macrozoobenthic community. The littoral macrozoobenthic community and water chemistry of 45 Canadian Shield lakes was sampled. The water chemistry variables sampled included pH, total dissolved calcium, conductivity, and dissolved organic acid (measured as colour). Partial canonical correlation analysis and partial regression analysis were used to identify those components of the macrozoobenthic community that most directly reflected pH variability. This

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19

Baker, Beverly Eloise. "Effect of Water Column pH and NO3 on Ortho-Phosphate Release Rates from Freshwater Sediments." W&M ScholarWorks, 1989. https://scholarworks.wm.edu/etd/1539617604.

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20

Dobranskyte, Agne. "Bioavailability and toxicity of aluminium in the fresh water snail 'Lymnaea stagnalis' at neutral pH." Thesis, University of Manchester, 2002. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.488400.

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21

Köhler, Stephan. "Quantifying the role of natural organic acids on pH and buffering in Swedish surface waters /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5626-6.pdf.

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22

Kumai, Yusuke. "Mechanisms of Na+ Homeostasis by Zebrafish (Danio Rerio) in Acidic Water." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/26205.

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Zebrafish, Danio rerio, are able to survive exposure to extreme acidity (pH 4). Because previous studies demonstrated that disruption of ionic balance during exposure to acidic water is the major cause of mortality in acid-sensitive freshwater species, the focus of this thesis was to characterize the molecular mechanisms enabling zebrafish to maintain their Na+ homeostasis following exposure to acidic water. Initial findings (Chapter 2) demonstrated that branchial mRNA expression of selected isoforms of claudins, major components of tight junctions, are altered in an isoform-dependent manner

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23

Wilson, Christopher Brant. "Measurement of chemical composition and pH profiles near the liquid-vapor interface of aqueous solutions using a unique confocal microscope system /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/9840.

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24

Wallace, Ashley J. "pH-triggered Self-Assembly of a PEGylated Peptide Amphiphilic Contrast Agent." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1500485484867638.

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25

Evans, C. E. "Effect of soil and water potential and pH on germination and establishment of some British plants." Thesis, Bucks New University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374822.

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26

Yang, Teng Teng, and 杨婷婷. "Corals in a variable physical environment : impacts on growth and the [delta]¹¹B pH-proxy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/209621.

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Coral reefs are important to sustain marine ecosystems and provide a reliable resource for studying past climate. Corals are increasingly challenged by changing environments. The marginal corals of Hong Kong provide a natural laboratory to study the combination of environmental conditions controlling coral distribution and growth. Salinity and pH were found to impact corals in studies of coral distribution, extension, and culture. Hong Kong corals have low extension rates (1.2-11.4 mm/yr) and do not colonize in areas of low in salinity and pH. Ten years of instrumental records showed extension

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27

Moldan, Filip. "Reversal of soil and water acidification in SW Sweden : simulating the recovery process /." Umeå : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5851-X.pdf.

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28

Bezděk, Ondřej. "Vliv pH záměsové vody na hydrataci a mechanické vlastnosti cementových kompozitů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217110.

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This master’s thesis is focused on the effect of mixing water pH value on hydration and mechanical properties of cement composites based on portland cement. Source material was CEM I 42,5 R. Hydration process was analyzed by isoperibolic calorimetry, X-ray diffraction analysis and differential thermal analysis. Compressive and flexural strength was examined as mechanical properties. The samples microstructure was observed by scanning electron microscopy. Influence of mixing water pH value on flexural and compressive strength, retardation of hydration and ratio of individual phases was shown.

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Schulte-Herbruggen, Helfrid Maria Albertina. "Remote community drinking water supply : mechanisms of uranium retention and adsorption by ultrafiltration, nanofiltration and reverse osmosis." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/7716.

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Worldwide, around 884 million people lack access to safe drinking water. To address this, groundwater sources such as boreholes and wells are often installed in remote locations especially in developing countries. However, the natural chemical composition of groundwater may be a source of toxicity to human health. Uranium is naturally present in the environment, and concentrations above the World Health Organisation (WHO) drinking water guideline (15 μg/L) are found in various parts of the world. Uranium has a complex aqueous chemistry and its speciation, which varies according to pH and avail

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30

Zhang, Zhenyu. "Mechanical properties and pH-dependent conformation of a model polymer and biomolecule at the silica-water interface." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489101.

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This thesis is concerned with the mechanical properties and pH-dependent conformation of macromolecules at the silica-water interface. It is believed that the adhesion of bacteria to solids is governed by long-range interactions and by immediate interactions between bacterial surface polymers and solid surfaces. For a flexible macromolecule, the interaction of its segments with a solid surface and the conformation it takes at the interface are prominent factors in determining the net interaction to solids.

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31

MAGINNIS, ALEXANDER R. "THE USE OF MICROELECTRODES FOR THE MEASUREMENT OF pH AND DO AT THE WALL OF DRINKING WATER PIPES." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin998062134.

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32

Rodrigues, Bruno da Silva. "Projeto e implementação de um sistema matricial para medição de pH baseado em transistores de porta suspensa (SGFET)." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-12122011-132247/.

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Este trabalho tem como objetivos: a caracterização dos sensores SGFET (Suspended Gate Field Effect Transistors) para medidas de pH, o desenvolvimento de um protocolo de calibração destes sensores e o desenvolvimento de um sistema autônomo de medidas utilizando matrizes de sensores SGFET para controle do pH e monitoramento da qualidade de água potável. Diferentes arranjos experimentais e metodologias de testes foram analisados no decorrer do trabalho. Na caracterização do sensor de pH, foram obtidas sensibilidades de até S=449 mV/pH valor 7 vezes superior à sensibilidade máxima obtida e

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33

Pinto, Marinaldo Ferreira. "Desenvolvimento de um sistema para o controle do pH da água para irrigação localizada." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11143/tde-21062010-154440/.

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A obstrução de emissores por causas químicas, em sistemas de irrigação localizada, é um problema crucial enfrentado pelos irrigantes, que em muitos casos, dependendo da gravidade, são obrigados a substituir o sistema existente. Isso se deve à presença de íons específicos, que em determinadas condições precipitam, provocando a obstrução dos emissores e tubulações. No entanto, pode-se intervir nas condições propícias a esse processo, de modo a preveni-lo. Uma forma de intervenção é a injeção de ácido, uma vez que este processo ocorre com maior proporção quando a água de irrigação apresenta valor

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34

Crossley, Mark Norman. "The effects of water flow, pH and nutrition on the growth of the native aquatic plant, Aponogeton elongatus /." [St. Lucia, Qld. : s.n.], 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17481.pdf.

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35

Millette, Louise. "The effect of pH adjustment on the internal corrosion rate of cast iron and copper water distribution pipes." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/26316.

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Two experimental sessions were conducted to examine to effects of pH adjustment on internal corrosion of cast iron and copper water distribution pipes. The Greater Vancouver Regional District uses surface lakes as its potable water source. As confirmed by chemical water characteristics monitoring, the supplied tap water has several of the attributes of an aggressive water: low pH (4.9 to 5.7), low alkalinity (10 to 15 mg/L as CaCO₃), low hardness (6 to 7 mg/L as CaCO₃), and dissolved oxygen consistently near saturation. Because of this aggressive nature, the tap water has a tendency to dissol

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36

Gatewood, Marena Dessette. "Solubility and recovery of L-isoleucine from high pH solutions and the cause for L-serine habit differences when crystallized from water and methanol/water solutions." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/10916.

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37

Gorsuch, Valerie A. "Tumble Marination Strategies to Improve pH, Color, and Water-Holding Capacity in Pale, Soft, and Exudative (PSE) Broiler Breast Fillets." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/42374.

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Tumble marination strategies to improve pH, color, and water holding capacity of pale, soft, and exudative (PSE) broiler breast fillets Valerie A. Gorsuch, M.S. Virginia Polytechnic Institute and State University Advisor: Christine Z. Alvarado ABSTRACT: Recently, there has been an increase in the incidence of pale soft and exudative poultry meat. Pale, soft, and exudative (PSE) meat is caused by a decline in pH early postmortem while carcass temperatures are still high. This decrease in pH leads to protein denaturation attributing to the pale color and poor water holding capacity (WHC

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38

Sjöholm, Johannes. "Trapping Tyrosine Z : Exploring the Relay between Photochemistry and Water Oxidation in Photosystem II." Doctoral thesis, Uppsala universitet, Molekylär biomimetik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-173575.

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Photosystem II is unique! It remains the only enzyme that can oxidize water using light as energy input. Water oxidation in photosystem II is catalyzed by the CaMn4 cluster. The electrons extracted from the CaMn4 cluster are transferred to P680+ via the tyrosine residue D1-Tyr161 (YZ). Favorable oxidation of YZ is coupled to a proton transfer along a hydrogen bond to the nearby D1-His190 residue, resulting in the neutral radical YZ•. By illuminating photosystem II at cryogenic temperatures, YZ• can be trapped in a stable state. Magnetic interaction between this radical and the CaMn4 cluster gi

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39

加藤, 喜久雄, Kikuo KATO, 錦平一柳 та Kimpei ICHIYANAGI. "森林流域における酸素安定同位体組成と主要成分濃度の変化について". 名古屋大学農学部付属演習林, 1996. http://hdl.handle.net/2237/8713.

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40

De, Luca Antonella. "Fenton and Photo-Fenton like at neutral pH for the removal of emerging contaminants in water and wastewater effluents." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/399786.

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In the last decades, the scientific community has been involved in the research of new kinds of contaminants generally known as of “emerging concern” (CECs). The harmfulness of CECs, even at small concentrations as well as, property of bioaccumulation and persistence, makes them extremely dangerous for the human health. The scientific community is constantly researching about novel treatments able to achieve the removal of these contaminants. Advanced Oxidation Processes (AOPs) are considered one of the most useful treatments to achieve CECs degradation. Among the AOPs, Fenton and photo‐Fen

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41

Payne, Joshua Bill. "Modeling the Growth and Death Kinetics of Salmonella in Poultry Litter as a Function of pH and Water Activity." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-07142005-161524/.

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In order to assess Salmonella dynamics in a poultry production setting, two studies were conducted to evaluate how common environmental factors during production influence Salmonella populations in poultry litter. A field study was initially conducted to determine Salmonella prevalence, populations, serotypes, and antibiotic resistance in fresh excreta and litter from commercial North Carolina broiler farms. Litter pH, temperature, ammonia levels, moisture content, and water activity (A<sub>w</sub>) were also measured. The purpose of this field study was to assess the populations and prevalenc

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42

Arora, Jaideep. "Effect of formulation and pH on rheological properties, particle size distribution, and stability of oil-in-water beverage emulsions." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86952.

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Beverage emulsions are oil-in-water (o/w) emulsions prepared by dispensing vegetable oils in an aqueous base containing hydrocolloids, preservatives, acid and colors. Stability of such emulsions, in both concentrated forms and diluted final preparations, is a requirement and physical separation (creaming) is a critical problem in the beverage industry. The main objective of this research was to investigate the concentration effects of different hydrocolloids, both individually and in combinations, at two pH levels (neutral and 3.4) on the associated rheological properties, particle size distri

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Everall, N. C. "The effects of water hardness and pH upon the toxicity of zinc to the brown trout Salmo trutta L." Thesis, Nottingham Trent University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374973.

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Lunden, James J. "Ocean Acidification and the Cold-Water Coral Lophelia pertusa in the Gulf of Mexico." Diss., Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/230387.

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Biology<br>Ph.D.<br>Ocean acidification is the reduction in seawater pH due to the absorption of anthropogenic carbon dioxide by the oceans. Reductions in seawater pH can inhibit the precipitation of aragonite, a calcium carbonate mineral used by marine calcifiers such as corals. Lophelia pertusa is a cold-water coral that forms large reef structures which enhance local biodiversity on the seafloor, and is found commonly from 300-600 meters on hard substrata in the Gulf of Mexico. The present study sought to investigate the potential impacts of ocean acidification on L. pertusa in the Gulf of

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Lima, F?bio Ara?jo de. "Sistema automatizado para o aproveitamento de ?gua cinza e azul, com controle de PH utilizando l?gica fuzzy." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15366.

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Made available in DSpace on 2014-12-17T14:55:51Z (GMT). No. of bitstreams: 1 FabioAL_DISSERT.pdf: 3109230 bytes, checksum: c3a4e73bfea10d6796f79168cb83b21d (MD5) Previous issue date: 2011-08-31<br>Every day, water scarcity becomes a more serious problem and, directly affects global society. Studies are directed in order to raise awareness of the rational use of this natural asset that is essential to our survival. Only 0.007% of the water available in the world have easy access and can be consumed by humans, it can be found in rivers, lakes, etc... To better take advantage of the water used

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Nikzad, Nadia. "Optimisation of a small-scale ultrafiltration system for separation of humic substances from surface water." Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298358.

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Norrvatten är den fjärde största dricksvattenproducenten i Sverige. De producerar och distribuerar dricksvatten till 14 kommuner norr om Stockholm. Norrvatten har under en tid studerat alternativa processer för att optimera och öka produktionskapaciteten och effektiviteten i deras dricksvattenreningsverk vid Görvälnverket. I detta projekt har en pilotanläggning använts för att studera och optimera ett hybridprocessteg bestående av ett koagulerings- och ultrafiltreringssteg med syfte att avlägsna humusämnen från ytvatten. Effekten av pH, reaktionstid och olika matarvattenkvaliteter (Görväln, F

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Matson, Johan. "Coffee grounds as an adsorbent for heavy metals in water treatment : Study based on the environment around Vattenriket, Kristianstad." Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96299.

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One of the modern times worst environmental problem are polluted water resources. An example of source of pollution to water resources are, heavy metal leached from acid sulfate soils (ASS). When these soils are stable, which they are if they are left underwater in an anoxic environment (for example below the water table), they are often sought after since they consist of high amount of nutrients which farmers use as farmlands. ASS is therefore created when farmers drain their land and the sulfide soil gets exposed to air, resulting in its oxidation and therefore formation of sulfuric acid. In

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Pokhrel, Lok R., Brajesh Dubey, and Phillip R. Scheuerman. "Natural Water Chemistry (dissolved Organic Carbon, Ph, and Hardness) Modulates Colloidal Stability, Dissolution, and Antimicrobial Activity of Citrate Functionalized Silver Nanoparticles." Digital Commons @ East Tennessee State University, 2014. https://doi.org/10.1039/C3EN00017F.

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Knowledge about whether/how natural water chemistry influences the fate, dissolution, and toxicity of silver nanoparticles (AgNPs) should contribute to ecological risk assessment and informed decision making. The effects of three critical water chemistry parameters – dissolved organic carbon (DOC), pH, and hardness – were investigated on the colloidal stability, dissolution dynamics, and antimicrobial activity of citrate-functionalized AgNPs (citrate–AgNPs) against Escherichia coli. Toxicities of citrate–AgNPs and AgNO3 were also determined in the river water samples collected across three sea

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Lemos, Lyzandra Lais de Almeida. "O potencial hidrogeniônico (ph) como parâmetro indicador do uso abusivo do aditivo alimentar fosfato em pescado." Universidade Federal Rural do Semi-Árido, 2017. http://bdtd.ufersa.edu.br:80/tede/handle/tede/732.

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Submitted by Socorro Pontes (socorrop@ufersa.edu.br) on 2017-06-28T13:32:56Z No. of bitstreams: 1 LyzandraLAL_DISSERT.pdf: 1553694 bytes, checksum: 3b2dce61aa34ba06fdc0df889642bc15 (MD5)<br>Made available in DSpace on 2017-06-28T13:32:56Z (GMT). No. of bitstreams: 1 LyzandraLAL_DISSERT.pdf: 1553694 bytes, checksum: 3b2dce61aa34ba06fdc0df889642bc15 (MD5) Previous issue date: 2017-02-22<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Considering the abusive use of humectant agents in frozen seafood processing, and a possible relationship between the pH parameter and the phosp

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Mohammed, Alahmad Suleiman. "Electrochemical and Electroflotation Processes for Milk Waste Water Treatment." Cleveland State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu151309400205639.

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