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Journal articles on the topic 'Characterization of sediments'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Alrawi, Reem A., Nik Norulaini Nik Ab Rahman, Anees Ahmad, Norli Ismail, and A. K. Mohd Omar. "Characterization of Oily and Non-Oily Natural Sediments in Palm Oil Mill Effluent." Journal of Chemistry 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/298958.

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Palm oil is one of the many vegetable oils widely consumed around the world. The production of palm oil requires voluminous amount of water with the concurrent generation of large amount of wastewater known as palm oil mill effluent (POME). POME is a mixture of water, oil, and natural sediments (solid particles and fibres).There is a dearth of information on the physical properties of these POME sediments. This study intends to distinguish the physical properties of oily and non-oily POME sediments which include sediment size, particle size distribution (PSD), sediment shape, sediment surface

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De Vincenzo, Annamaria, Carmine Covelli, Antonio Molino, Marilena Pannone, Margherita Ciccaglione, and Bruno Molino. "Long-Term Management Policies of Reservoirs: Possible Re-Use of Dredged Sediments for Coastal Nourishment." Water 11, no. 1 (2018): 15. http://dx.doi.org/10.3390/w11010015.

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This paper proposes a methodological approach to the re-use of reservoir sediments for coastal nourishment. The proposed approach represents a point of convergence between water and sediment management, coastal protection from erosion and the re-use of sediments dredged from reservoirs. In particular, this study indicates a general protocol of actions and a reference legislative scenario for the use of sediment from reservoirs for beach nourishment as an alternative to sediment from sea caves or land caves. Quantitative characterization of reservoir sediments and their qualitative characteriza

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Ean, L. W., M. A. Malek, Bashar S. Mohammed, Chao-Wei Tang, and P. X. H. Bong. "A Review on Characterization of Sediments for Green Bricks Production." International Journal of Engineering & Technology 7, no. 4.35 (2018): 41. http://dx.doi.org/10.14419/ijet.v7i4.35.22319.

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Accumulation of dredged sediment has raised environmental concern in various countries. Recycling of sediment into bricks is a viable solution to the environmental pollution. Concerning to the utilization of sediment in bricks, this study reviews the needs of characterization on sediment and methods of producing sediment bricks. Particle size distribution was found to be the key criteria for characterization of sediment. Sizes of particles determined the function of the sediments in the bricks. In spite of that, leachability of heavy metals is another important aspect for contaminated sediment

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Farooq, Sumera, and Nazia Arshad. "Sediment Characterization and Monsoonal Impact on Beach Morphology at the Three Beaches along the Karachi Coast, Pakistan." International Journal of Economic and Environmental Geology 12, no. 1 (2021): 8185. http://dx.doi.org/10.46660/ijeeg.vol12.iss1.2021.566.

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Sediment characteristics plays important role in the determination and functioning of coastal ecosystems. The present study is an attempt to evaluate the variability in sediment characteristics of the three beaches: Clifton, Sandspit and Buleji, at the Karachi coast. The samples were collected during pre-monsoon and south-west monsoon seasons to evaluate the seasonal differences. The sediments of the three sites showed variations in moisture content, organic matter and grain size. The highest mean moisture (27.17%) and organic contents (3.5 %) were recorded from the sediments of Clifton. The m

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Juchen, Carlos Roberto, Cristiano Poleto, Marcio Antonio Vilas Boas, and Rodrigo Trevisani Juchen. "MINERALOGICAL AND CHEMICAL CHARACTERIZATION OF SEDIMENTS FROM IMPERVIOUS URBAN STREETS." Journal of Urban and Environmental Engineering 10, no. 2 (2017): 194–200. http://dx.doi.org/10.4090/juee.2016.v10n2.194-200.

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This study aimed to determine the granulometric and mineralogical composition and the contents of trace elements Cr, Ni and Pb in sediments collected in impermeable streets located in the urban perimeter of Toledo PR, Brazil. The mineralogical analyses were performed by a diffractometer, the granulometric by integrated sieving methods and laser diffraction, trace elements in sediment quartered fractions by optical emission spectrometry with inductively coupled plasma (ICP-OES). It was concluded that the sediments with an average granulometric greater than 0.09 mm and finer fractions represente

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Juchen, Carlos Roberto, Cristiano Poleto, Marcio Antonio Vilas Boas, and Rodrigo Trevisani Juchen. "MINERALOGICAL AND CHEMICAL CHARACTERIZATION OF SEDIMENTS FROM IMPERVIOUS URBAN STREETS." Journal of Urban and Environmental Engineering 10, no. 2 (2017): 194–200. http://dx.doi.org/10.4090/juee.2016.v10n2.194200.

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This study aimed to determine the granulometric and mineralogical composition and the contents of trace elements Cr, Ni and Pb in sediments collected in impermeable streets located in the urban perimeter of Toledo PR, Brazil. The mineralogical analyses were performed by a diffractometer, the granulometric by integrated sieving methods and laser diffraction, trace elements in sediment quartered fractions by optical emission spectrometry with inductively coupled plasma (ICP-OES). It was concluded that the sediments with an average granulometric greater than 0.09 mm and finer fractions represente

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Pruijn, M. F., S. C. van Winden, and H. H. A. G. Wevers. "From characterization of sediment to full scale treatment by wet particle separation." Water Science and Technology 37, no. 6-7 (1998): 189–98. http://dx.doi.org/10.2166/wst.1998.0752.

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Contaminated sediments represent a significant environmental problem in the Netherlands. Dutch policy aims on reusing the sand in the contaminated sediments. The reusable sand can be separated from the sediment by utilizing wet particle separation techniques. The quality and the quantity of the recovered sand product determines whether the application of wet particle separation is economically feasible. Therefore it is important to be able to predict the results of full scale sediment treatment. These predictions can be obtained by thoroughly characterizing the specific contaminated sediment.

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Darricau, Louise, Abdellatif Elghali, Patrick Martel, and Mostafa Benzaazoua. "Evaluation of the Anthropogenic Metal Pollution at Osisko Lake: Sediments Characterization for Reclamation Purposes." Applied Sciences 11, no. 5 (2021): 2298. http://dx.doi.org/10.3390/app11052298.

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The anthropogenic pollution of lake ecosystems by human activities (e.g., mining industries) is recognized as a serious issue. The Osisko urban lake located in Rouyn-Noranda (Quebec, Canada) was used partially as a waste disposal facility for many decades, causing a heavy pollution. The main undertakings of this study are (i) assessing the mineralogical and geochemical properties of lake Osisko sediments, and (ii) studying the pollution that occurred within lake water due to the sediments’ reactivity. Water and sediments across the lake were collected in different sensitive locations. Within t

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9

Bennett, Gary F. "Characterization of Contaminated Sediments." Journal of Hazardous Materials 98, no. 1-3 (2003): 320–21. http://dx.doi.org/10.1016/s0304-3894(02)00296-0.

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10

Wartel, Stanislas. "Characterization of mud sediments." Geo-Marine Letters 11, no. 3-4 (1991): 109. http://dx.doi.org/10.1007/bf03217713.

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11

Kumari, Anupama, Chandrajit Balomajumder, Amit Arora, Gaurav Dixit, and Sina Rezaei Gomari. "Physio-Chemical and Mineralogical Characteristics of Gas Hydrate-Bearing Sediments of the Kerala-Konkan, Krishna-Godavari, and Mahanadi Basins." Journal of Marine Science and Engineering 9, no. 8 (2021): 808. http://dx.doi.org/10.3390/jmse9080808.

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The characteristics of the hydrate-bearing sediments affect the formation and dissociation of gas hydrate in sediments. The mineral composition, their dispersion, and chemical composition of hydrate-bearing sediment samples plays a dominant role in the hydrate stability condition and its economic development. In this paper, the physical properties of hydrate-bearing sediment of India are compared with each other. The sediment samples are taken from the Krishan-Godavari basin (Depth—127.5 and 203.2 mbsf), Mahanadi basin (Depth—217.4 mbsf), and Kerala-Konkan basin (Depth—217.4 mbsf). The saturat

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Omari, Hind, Ali Dehbi, Adil Lammini, and Abdelaziz Abdallaoui. "Study of the Phosphorus Adsorption on the Sediments." Journal of Chemistry 2019 (April 14, 2019): 1–10. http://dx.doi.org/10.1155/2019/2760204.

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The objective of this work is to determine the reflection elements, allowing the understanding of the phosphorus fixation mechanisms. The samples were taken from Oued Boufekrane in the Meknes region (Northwest of Morocco). In fact, the sediment characterization was examined by the Brunauer–Emmett–Teller (BET) specific surface area and Fourier-transform infrared (FTIR) spectroscopy measurements. A series of experiments were then carried out to study the impact of some parameters on the adsorption capacity. Indeed, the effect of contact time, sediment mass, pH, initial concentration of potassium

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Luo, Yongpeng, Shenxu Bao, Siyuan Yang, et al. "Characterization, Spatial Variation and Management Strategy of Sewer Sediments Collected from Combined Sewer System: A Case Study in Longgang District, Shenzhen." International Journal of Environmental Research and Public Health 18, no. 14 (2021): 7687. http://dx.doi.org/10.3390/ijerph18147687.

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In the urban drainage system, the formation of sewer sediments is inevitable, and the removal of sewer sediments is necessary for system maintenance. Disposal of arisings from sewer sediment removal is becoming a serious environmental issue. The current knowledge of sewer sediments is limited, which is restrained to sewer sediments management. To better understand this municipal waste, the sewer sediments of a combined sewer system in Longgang District, Shenzhen were collected and characterized, and the spatial distribution characteristics of contaminants were analyzed. Based on the bivariate

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Helton, Rebekah R., and K. Eric Wommack. "Seasonal Dynamics and Metagenomic Characterization of Estuarine Viriobenthos Assemblages by Randomly Amplified Polymorphic DNA PCR." Applied and Environmental Microbiology 75, no. 8 (2009): 2259–65. http://dx.doi.org/10.1128/aem.02551-08.

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ABSTRACT Direct enumeration and genetic analyses indicate that aquatic sediments harbor abundant and diverse viral communities. Thus far, synecological analysis of estuarine sediment viral diversity over an annual cycle has not been reported. This oversight is due in large part to a lack of molecular genetic approaches for assessing viral diversity within a large collection of environmental samples. Here, randomly amplified polymorphic DNA PCR (RAPD-PCR) was used to examine viral genotypic diversity within Chesapeake Bay sediments. Using a single 10-mer oligonucleotide primer for all samples,

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Rocha, Gustavo Rodrigues da, and Helenice Vital. "MORPHOLOGICAL CHARACTERIZATION OF THE POTENGI RIVER ESTUARINE SYSTEM, NATAL (BRAZIL)." Revista Brasileira de Geofísica 33, no. 1 (2015): 141. http://dx.doi.org/10.22564/rbgf.v33i1.649.

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ABSTRACT. This study mapped the Potengi estuary riverbed (Natal-RN), located in northeastern Brazil, using high-resolution geophysics (single beam and side-scan sonar) associated with sediment samples. The imaging of subaqueous features allowed to identify the bedforms and submerged rocky outcrops. Four main groups of bedforms were identified: large 2-D and 3-D dunes, ripples and flat bottom, as well as rocky outcrops. Rocky outcrops were correlated to Barreiras Formation and beachrocks. The estuarine channel is filled mainly by Holocene sandy sediments in the main channel ranging from well-so

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16

Belzile, Nelson, Helen A. Joly, and Hongbo Li. "Characterization of humic substances extracted from Canadian lake sediments." Canadian Journal of Chemistry 75, no. 1 (1997): 14–27. http://dx.doi.org/10.1139/v97-003.

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Humic substances (HS) were extracted from the sediments of four Sudbury area lakes, namely, Tilton, Clearwater, Silver, and Ramsey Lakes, with the aid of 0.1 M Na4P2O7 and 0.5 M NaOH solutions. The HS (humic and fulvic acids) were purified and characterized using the methods of elemental analysis, visible spectroscopy (E4/E6 ratio), FTIR, and solid-state 13C CPMAS NMR. A substantial amount of information with regard to the composition and chemical nature of lake sediment HS was obtained. The results obtained for the Sudbury area lake sediments were compared with one another and with HS from ot

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17

Uriarte, Adolfo, Javier Franco, Angel Borja, Victoriano Valencia, and Raúl Castro. "Sediment and heavy metal distribution and transport in a coastal area affected by a submarine outfall in the Basque Country (Northern Spain)." Water Science and Technology 37, no. 6-7 (1998): 55–61. http://dx.doi.org/10.2166/wst.1998.0735.

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In 1989 a submarine outfall was brought into service in the coastal area of Zarautz, in the Basque Country (north of Spain). The outfall discharge point is located at ∼35 m depth and ∼1 km offshore. This work deals with the sediment dispersion and distribution patterns in the vicinity of an outfall. The methodological field procedures included bathimetric surveys and sediment sampling for grain size characterization and analysis of organic matter content and heavy metal concentrations. Sediment resuspension and transport paths were estimated. Small-sized sediments have been only deposited in t

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18

Ferrans, Laura, Yahya Jani, Ling Gao, and William Hogland. "Characterization of dredged sediments: a first guide to define potentially valuable compounds – the case of Malmfjärden Bay, Sweden." Advances in Geosciences 49 (September 24, 2019): 137–47. http://dx.doi.org/10.5194/adgeo-49-137-2019.

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Abstract. Millions of tons of bottom sediments are dredged annually all over the world. Ports and bays need to extract the sediments to guarantee the navigation levels or remediate the aquatic ecosystem. The removed material is commonly disposed of in open oceans or landfills. These disposal methods are not in line with circular-economy goals and additionally are unsuitable due to their legal and environmental compatibility. Recovery of valuables represents a way to eliminate dumping and contributes towards the sustainable extraction of secondary raw materials. Nevertheless, the recovery varie

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Pedersen, Finn, Estelle Bjørnestad, Helle Vang Andersen, Jesper Kjølholt, and Christian Poll. "Characterization of sediments from Copenhagen Harbour by use of biotests." Water Science and Technology 37, no. 6-7 (1998): 233–40. http://dx.doi.org/10.2166/wst.1998.0757.

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The potential environmental hazard of sediment samples from Copenhagen Harbour was investigated by a combination of chemical analyses and biological tests. The chemical analyses comprised determination of the content of heavy metals, polycyclic aromatic hydrocarbons and polychlorinated biphenyls, and the biological tests comprised whole sediment bioassays with the amphipod Corophium volutator, testing of a sediment suspension with the Microtox Solid Phase test, and testing of sediment pore water by the copepod Acartia tonsa and the alga Skeletonema costatum. For all sediment samples, the conce

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Arcone, Steven, David Finnegan, and Ginger Boitnott. "GPR characterization of a lacustrine UXO site." GEOPHYSICS 75, no. 4 (2010): WA221—WA239. http://dx.doi.org/10.1190/1.3467782.

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We used [Formula: see text] ground-penetrating-radar (GPR) reflection profiles to determine if high-explosive (HE) depth bombs were possibly detonated within a small New England lake formerly used as a bombing range, as well as the depths and distribution of inert and possibly unexploded ordnance (UXO) within the subbottom sediments. Maximum water depth was [Formula: see text]. The primary munitions were unarmed practice bombs, but terrestrial fragments from HE depth bombs led us to seek stratigraphic obliteration and distortion as evidence of their use. The low water conductivity and quartz-r

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Klein, Katherine, and J. Carlos Santamarina. "Soft Sediments: Wave-based Characterization." International Journal of Geomechanics 5, no. 2 (2005): 147–57. http://dx.doi.org/10.1061/(asce)1532-3641(2005)5:2(147).

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22

Crompton, Jeff W., Gwenn E. Flowers, and Brendan Dyck. "Characterization of glacial silt and clay using automated mineralogy." Annals of Glaciology 60, no. 80 (2019): 49–65. http://dx.doi.org/10.1017/aog.2019.45.

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AbstractGlacial erosion produces vast quantities of fine-grained sediment that has a far-reaching impact on Earth surface processes. To gain a better understanding of the production of glacial silt and clay, we use automated mineralogy to quantify the microstructure and mineralogy of rock and sediment samples from 20 basins in the St. Elias Mountains, Yukon, Canada. Sediments were collected from proglacial streams, while rock samples were collected from ice marginal outcrops and fragmented using electrical pulse disaggregation. For both rock fragments and sediments, we observe a log-normal dis

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Ausili, Antonella, Mauro Mecozzi, Massimo Gabellini, Giuseppina Ciuffa, and Francesco Mellara. "Physico chemical characteristics and multivariate analysis of contaminated harbour sediments." Water Science and Technology 37, no. 6-7 (1998): 131–39. http://dx.doi.org/10.2166/wst.1998.0745.

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Dredging is a very important procedure within harbour management. Italian legislation regulates dredging activity requiring high number of sampling stations and physico chemical and biological parameters but the criteria for their interpretation are not reported adequately. The comprehension of the information included in the data is a very critical step of every dredging activity of harbour sediments and the traditional examination of these large database (searching of average values of pollutants or simple correlations among pollutants) does not make easy their interpretation. So the include

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Apitz, Sabine E. "Streamlining contaminated sediment management: the use of advanced sediment characterization — preliminary results." Water Science and Technology 37, no. 6-7 (1998): 435–42. http://dx.doi.org/10.2166/wst.1998.0782.

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Simply knowing the geographic extent of sediment contamination within a bay or estuary does not provide sufficient insight to help a site manager or stakeholder begin to assess how to manage sediments deemed either an ecological risk or regulatory violation. A better approach is to assess contaminant distribution and behavior at a micro-scale in parallel with macro-scale site assessments. In such an approach, a site investigation includes an assessment of contaminant/sediment biogeochemistry, as it will impact bioavailability, risk, and potential management options. This paper reviews some app

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Wang, Yu-Hsing, and Xiaobo Dong. "Laboratory characterization of the spatial variability in soils by the EM-wave-based technique." Canadian Geotechnical Journal 45, no. 1 (2008): 102–16. http://dx.doi.org/10.1139/t07-080.

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A slim-form, open-ended coaxial probe with an outside diameter of 2.2 mm was used in this study to take local dielectric measurements in soils. The dielectric relaxation strength of bulk water, Δκw, and the DC conductivity of the saturated sample, σmix, are jointly used to characterize the spatial variability of different specimens including glass beads, sand and mica samples, and kaolinite sediments with two different fabric associations. The pore distribution along the sample depth can be inferred from the local Δκw using mixing rules. The directional feature of the interconnected pores is c

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Mariyanto, Mariyanto, Ayi Syaeful Bahri, Widya Utama, et al. "Relation Between Transport Distance with Frequency-Dependent Volume Magnetic Susceptibility in Surabaya River Sediments." Jurnal Penelitian Fisika dan Aplikasinya (JPFA) 8, no. 1 (2018): 33. http://dx.doi.org/10.26740/jpfa.v8n1.p33-41.

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Volume magnetic susceptibility measurements have been widely used in numerous studies related to river sediment characterization. A study of the transport distance effect toward the frequency-dependent volume magnetic susceptibility is needed to identify the superparamagnetic grain behavior in river sediments. The purpose of this study is to identify the presence of superparamagnetic grains and to obtain the relation between transport distances and frequency-dependent volume magnetic susceptibility in river sediments. The sediment samples were taken and measured by using the Bartington MS2B Su

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Peteuil, Christophe, Magali Jodeau, Matthieu De Linares, et al. "Toward an operational approach for the characterization and modelling of fine sediments dynamics in reservoirs." E3S Web of Conferences 40 (2018): 03028. http://dx.doi.org/10.1051/e3sconf/20184003028.

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Achieving a sustainable management of sediment fluxes in existing or proposed reservoirs is a challenging but essential requirement for dam operators. Such objective is of utmost importance to avoid sedimentation-related consequences. Numerical modelling is of great interest to understand the flow and sediment dynamics in a reservoir, to simulate the long-term evolution of sediment deposits and to evaluate the efficiency of various management strategies. This paper presents recent case studies, which validate the feasibility and relevancy of such technical option. The progresses obtained on es

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de Lima, J. L. M. P., C. S. Souza, and V. P. Singh. "Granulometric characterization of sediments transported by surface runoff generated by moving storms." Nonlinear Processes in Geophysics 15, no. 6 (2008): 999–1011. http://dx.doi.org/10.5194/npg-15-999-2008.

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Abstract. Due to the combined effect of wind and rain, the importance of storm movement to surface flow has long been recognized, at scales ranging from headwater scales to large basins. This study presents the results of laboratory experiments designed to investigate the influence of moving rainfall storms on the dynamics of sediment transport by surface runoff. Experiments were carried out, using a rain simulator and a soil flume. The movement of rainfall was generated by moving the rain simulator at a constant speed in the upstream and downstream directions along the flume. The main objecti

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O.A, Omoregbe, Oloyede D.A, Ekuerugbe L.O, and Nkim A.G. "Geochemical Characterization of Shallow Lagoon Sediments." International Journal of Scientific and Research Publications (IJSRP) 10, no. 05 (2020): 410–22. http://dx.doi.org/10.29322/ijsrp.10.05.2020.p10148.

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Azzouz, Sarah, Rayene Meribout, and Chahrazed Boukhalfa. "Characterization of Phosphate Adsorption on Sediments." Procedia Engineering 33 (2012): 285–92. http://dx.doi.org/10.1016/j.proeng.2012.01.1206.

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Hidayat, Yayat, Kukuh Murtilaksono, and Naik Sinukaban. "Characterization of Surface Runoff, Soil Erosion and Nutrient Loss on Forest-Agriculture Landscape." Journal of Tropical Soils 17, no. 3 (2013): 259–66. http://dx.doi.org/10.5400/jts.2012.v17i3.259-266.

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The study was aimed to quantify volume of surface runoff, soil erosion and nutrient loss from the forest-agriculture landscape (forest margins) in Lore Lindu National Park Central Sulawesi. Surface runoff volume and soil erosion were measured daily on erosion plots. It was installed on several land use types i.e. forest land, maize, young cocoa, medium cocoa, old cocoa, vanilla, shrub and bush and bareland, on the soil Typic Dystrudepts with slope ± 40%. The nutrient content in surface runoff and sediments were analyzed from selected surface runoff and sediment samples. Surface runoff and soil

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Steinman, Alan D., Karl E. Havens, J. William Louda, Nancy M. Winfree, and Earl W. Baker. "Characterization of the photoautotrophic algal and bacterial communities in a large, shallow, subtropical lake using HPLC-PDA based pigment analysis." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 1 (1998): 206–19. http://dx.doi.org/10.1139/f97-239.

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Pigment abundances of the oxygenic and anoxygenic photoautotrophic communities from sediments and the water column in Lake Okeechobee, Florida, were estimated using reverse-phase high-performance liquid chromatographic (RP-HPLC) and photodiode array (PDA) UV/VIS (350-800 nm) spectrophotometric analyses. Thirty lipophilic pigments were identified and measured in the samples, with the most abundant overall (sediment and open-water samples combined) being chlorophyll a (38.1%), fucoxanthin (12.6%), pheophytin a (7.6%), zeaxanthin (6.6%), and pyropheophytin a (3.6%). Relative abundance of chloroph

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Praeger, Thomas H., Stuart D. Messur, and Richard P. DiFiore. "Remediation of PCB-containing sediments using surface water diversion “dry excavation”: a case study." Water Science and Technology 33, no. 6 (1996): 239–45. http://dx.doi.org/10.2166/wst.1996.0102.

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Remediation of contaminated sediments presents an on-going challenge in the efforts toward improved water quality and environmental restoration. Faced with this challenge, Mercury Marine recently selected a remedial alternative that included diverting creek flow and removing approximately 5,900 in-situ cubic meters of sediments containing PCBs from an impoundment in Cedar Creek. The regulatory objective was to remove all sediment containing PCBs “to the extent practicable” from an 180-meter stretch of the impoundment. A remedial investigation was conducted to collect the data necessary to char

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Lu, Cheng, Xuwen Qin, Lu Yu, et al. "The Characteristics of Gas-Water Two-Phase Radial Flow in Clay-Silt Sediment and Effects on Hydrate Production." Geofluids 2021 (May 11, 2021): 1–14. http://dx.doi.org/10.1155/2021/6623802.

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Many hydrate-bearing sediments in the Shenhu area of the South China Sea are featured with unconsolidated clayed silt, small particle size, and high content of clay, which can pose a great challenge for gas production. In order to investigate the gas-water relative permeability in clay-silt sediments, through a radial flow experiment, samples from the target sediment in the Shenhu area were selected and studied. The results show that the irreducible water saturation is high and the influence of the gas-water interaction is obvious. The relative permeability analysis shows that the two-phase fl

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Mansour, R., S. Rioual, B. Lescop, et al. "Development of a Resonant Microwave Sensor for Sediment Density Characterization." Sensors 20, no. 4 (2020): 1058. http://dx.doi.org/10.3390/s20041058.

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In this study, a sensor based on the development of a planar antenna immersed in sediments dedicated to water content monitoring in this type of material is proposed and experimentally validated. It is produced by a conventional Printed Circuit Board (PCB) manufacturing process on a double-sided metalized FR4 substrate. The sensitivity of the sensor is ensured by the variation of the real part of the complex dielectric permittivity of sediments with water content at around 1 GHz. As shown, in this frequency range, electrode polarization and Maxwell–Wagner polarization effects become negligible

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Yacoub, Cristina, Agustí Pérez-Foguet, and Nuria Miralles. "Trace Metal Content of Sediments Close to Mine Sites in the Andean Region." Scientific World Journal 2012 (2012): 1–12. http://dx.doi.org/10.1100/2012/732519.

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This study is a preliminary examination of heavy metal pollution in sediments close to two mine sites in the upper part of the Jequetepeque River Basin, Peru. Sediment concentrations of Al, As, Cd, Cu, Cr, Fe, Hg, Ni, Pb, Sb, Sn, and Zn were analyzed. A comparative study of the trace metal content of sediments shows that the highest concentrations are found at the closest points to the mine sites in both cases. The sediment quality analysis was performed using the threshold effect level of the Canadian guidelines (TEL). The sediment samples analyzed show that potential ecological risk is cause

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Wu, Liyou, Laurie Kellogg, Allan H. Devol, James M. Tiedje, and Jizhong Zhou. "Microarray-Based Characterization of Microbial Community Functional Structure and Heterogeneity in Marine Sediments from the Gulf of Mexico." Applied and Environmental Microbiology 74, no. 14 (2008): 4516–29. http://dx.doi.org/10.1128/aem.02751-07.

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ABSTRACT Marine sediments of coastal margins are important sites of carbon sequestration and nitrogen cycling. To determine the metabolic potential and structure of marine sediment microbial communities, two cores were collected each from the two stations (GMT at a depth of 200 m and GMS at 800 m) in the Gulf of Mexico, and six subsamples representing different depths were analyzed from each of these two cores using functional gene arrays containing ∼2,000 probes targeting genes involved in carbon fixation; organic carbon degradation; contaminant degradation; metal resistance; and nitrogen, su

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Nold, Stephen C., Joseph B. Pangborn, Heidi A. Zajack, Scott T. Kendall, Richard R. Rediske, and Bopaiah A. Biddanda. "Benthic Bacterial Diversity in Submerged Sinkhole Ecosystems." Applied and Environmental Microbiology 76, no. 1 (2009): 347–51. http://dx.doi.org/10.1128/aem.01186-09.

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ABSTRACT Physicochemical characterization, automated ribosomal intergenic spacer analysis (ARISA) community profiling, and 16S rRNA gene sequencing approaches were used to study bacterial communities inhabiting submerged Lake Huron sinkholes inundated with hypoxic, sulfate-rich groundwater. Photosynthetic cyanobacterial mats on the sediment surface were dominated by Phormidium autumnale, while deeper, organically rich sediments contained diverse and active bacterial communities.

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Kogelbauer, I., and W. Loiskandl. "Characterization of sediment layer composition in a shallow lake: from open water zones to reed belt areas." Hydrology and Earth System Sciences 19, no. 3 (2015): 1427–38. http://dx.doi.org/10.5194/hess-19-1427-2015.

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Abstract. Lake sediment characterization, a prerequisite for the vulnerability assessment of lake ecosystems, demands reliable in situ methods for the characterization of the sediment layer composition. A unified characterization of lake sediments within lake ecotopes (open water, open water patches within the reed, and the reed) is still a challenge. Each ecotope is covered by different classical scientific disciplines (hydrography and terrestrial remote sensing to soil physics) with their specific characterization methods. Recently, a complementary tool that bridges the gap between land and

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Kogelbauer, I., and W. Loiskandl. "Characterization of sediment layer composition in a shallow lake: from open water zones to reed belt areas." Hydrology and Earth System Sciences Discussions 11, no. 11 (2014): 12627–57. http://dx.doi.org/10.5194/hessd-11-12627-2014.

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Abstract. Lake sediment characterization, a pre-requirement for the vulnerability assessment of lake ecosystems, demands reliable in situ methods for the characterization of the sediment layer composition. A unified characterization of lake sediments within different lake ecotopes (open water, open water patches within the reed, and the reed) is still a challenge. Each ecotope is covered by different classical scientific disciplines (hydrography and terrestrial remote sensing to soil physics) with their specific characterization methods. However, a complementary tool that bridges the gap betwe

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Ghose-Hajra, M., A. McCorquodale, G. Mattson, D. Jerolleman, and J. Filostrat. "Effects of salinity and particle concentration on sediment hydrodynamics and critical bed-shear-stress for erosion of fine grained sediments used in wetland restoration projects." Proceedings of the International Association of Hydrological Sciences 367 (March 3, 2015): 435–41. http://dx.doi.org/10.5194/piahs-367-435-2015.

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Abstract. Sea-level rise, the increasing number and intensity of storms, oil and groundwater extraction, and coastal land subsidence are putting people and property at risk along Louisiana’s coast, with major implications for human safety and economic health of coastal areas. A major goal towards re-establishing a healthy and sustainable coastal ecosystem has been to rebuild Louisiana’s disappearing wetlands with fine grained sediments that are dredged or diverted from nearby rivers, channels and lakes to build land in open water areas. A thorough geo-hydrodynamic characterization of the depos

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Kanbar, Hussein Jaafar, Thai Tran Le, Fredrik Olajos, Göran Englund, and Michael Holmboe. "Tracking mineral and geochemical characteristics of Holocene lake sediments: the case of Hotagen, west-central Sweden." Journal of Soils and Sediments 21, no. 9 (2021): 3150–68. http://dx.doi.org/10.1007/s11368-021-03012-y.

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Abstract Purpose Intact lake sediments reflect the development of terrestrial ecosystems. This development can be understood by decoding mineral and geochemical information of sedimentary archives. Therefore, we characterized a Holocene lake sediment core and revealed bulk to micro-scale variations via a combination of geochemical techniques and statistical methods. Methods A 2.3 m sediment core was collected from Hotagen, a lake in west-central Sweden; a sediment sample was collected every 5 cm. A part of each sediment sample was kept untreated (named bulk) and another part was size-fractiona

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Petrie, Lainie, Nadia N. North, Sherry L. Dollhopf, David L. Balkwill, and Joel E. Kostka. "Enumeration and Characterization of Iron(III)-Reducing Microbial Communities from Acidic Subsurface Sediments Contaminated with Uranium(VI)." Applied and Environmental Microbiology 69, no. 12 (2003): 7467–79. http://dx.doi.org/10.1128/aem.69.12.7467-7479.2003.

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ABSTRACT Iron(III)-reducing bacteria have been demonstrated to rapidly catalyze the reduction and immobilization of uranium(VI) from contaminated subsurface sediments. Thus, these organisms may aid in the development of bioremediation strategies for uranium contamination, which is prevalent in acidic subsurface sediments at U.S. government facilities. Iron(III)-reducing enrichment cultures were initiated from pristine and contaminated (high in uranium, nitrate; low pH) subsurface sediments at pH 7 and pH 4 to 5. Enumeration of Fe(III)-reducing bacteria yielded cell counts of up to 240 cells ml

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Zeng, Liqing, Fan Yang, Changzhou Yan, and Xinhong Wang. "High-resolution characterization of labile phosphorus, iron, and manganese in sediments of different trophic waters in Lake Taihu, China." Water Science and Technology 77, no. 2 (2017): 286–95. http://dx.doi.org/10.2166/wst.2017.534.

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Abstract High-resolution combined ZrO-Chelex diffusive gradients in thin film (DGT) probes were arranged to synchronously monitor the characteristics of labile phosphorus (P), iron (Fe), and manganese (Mn) in sediments from regions of varying trophic levels in Lake Taihu, China. Results showed that P release was closely related to the lake region's trophic level. Labile P in sediments and the apparent diffusion flux (Fd) of P were higher in hyper-eutrophic algae-dominated regions than those in macrophyte-algae-dominated and macrophyte-dominated regions, indicating that P released from sediment

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RIBEIRO FILHO, JACQUES CARVALHO, HELBA ARAÚJO DE QUEIROZ PALÁCIO, EUNICE MAIA DE ANDRADE, JÚLIO CÉSAR NEVES DOS SANTOS, and JOSÉ BANDEIRA BRASIL. "RAINFALL CHARACTERIZATION AND SEDIMENTOLOGICAL RESPONSES OF WATERSHEDS WITH DIFFERENT LAND USES TO PRECIPITATION IN THE SEMIARID REGION OF BRAZIL." Revista Caatinga 30, no. 2 (2017): 468–78. http://dx.doi.org/10.1590/1983-21252017v30n222rc.

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ABSTRACT The objective of this work was to evaluated the precipitation characteristics (depth, I30 and erosivity) and their effects on sediment production in three watersheds under different managements of land use 35-year regenerating Caatinga (RC), thinned Caatinga (TC), which underwent thinning of trees with diameter smaller than 10 cm; and deforested Caatinga (followed by burning and pasture) (DC). The experimente was conducted in the central, tropical semiarid region of the State of Ceará, Brazil. The precipitation events, surface runoff and sediment production were monitored from 2010 to

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Elyashiv, Hadar, Revital Bookman, Lennart Siemann, Uri ten Brink, and Katrin Huhn. "Numerical Characterization of Cohesive and Non-Cohesive ‘Sediments’ under Different Consolidation States Using 3D DEM Triaxial Experiments." Processes 8, no. 10 (2020): 1252. http://dx.doi.org/10.3390/pr8101252.

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The Discrete Element Method has been widely used to simulate geo-materials due to time and scale limitations met in the field and laboratories. While cohesionless geo-materials were the focus of many previous studies, the deformation of cohesive geo-materials in 3D remained poorly characterized. Here, we aimed to generate a range of numerical ‘sediments’, assess their mechanical response to stress and compare their response with laboratory tests, focusing on differences between the micro- and macro-material properties. We simulated two endmembers—clay (cohesive) and sand (cohesionless). The ma

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Udeinya, Iroka Joseph, Nkoyo Imelda Nubila, Uzoamaka Adaobi Okoli, et al. "Oil Palm Deseeded Fruit Head Ash: Fractionation and Characterization." Advanced Materials Research 1160 (January 2021): 75–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1160.75.

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The processing of palm oil from the fruits of the African oil palm generates an increasing amounts of solid waste. The production of beneficial products for various applications from the oil palm wastes would reduce the amount of unwanted materials produced and contribute to a healthier environment. In this research, fractions were derived from the filtrate of the oil palm deseeded fruit head ash by fractional crystallization. Their physicochemical properties, cation, and anion compositions were determined by standard methods. Three hygroscopic oil palm ash fractions, namely crystals, anhydrou

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Villasante-Marcos, Víctor, Francisca MartÍNez-Ruiz, María Luisa Osete, and Jaime Urrutia-Fucugauchi. "Magnetic characterization of Cretaceous-Tertiary boundary sediments." Meteoritics & Planetary Science 42, no. 9 (2007): 1505–27. http://dx.doi.org/10.1111/j.1945-5100.2007.tb00588.x.

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Ahmad, Nasier, Sarojini Johri, Phalisteen Sultan, Malik Z. Abdin, and Ghulam N. Qazi. "Phylogenetic Characterization of Archaea in Saltpan Sediments." Indian Journal of Microbiology 51, no. 2 (2011): 132–37. http://dx.doi.org/10.1007/s12088-011-0125-2.

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García-Rosales, G., E. Ordoñez-Regil, J. J. Ramírez Torres, J. López Monroy, M. L. Machain-Castillo, and L. C. Longoria-Gándara. "Characterization of marine sediments using analytical techniques." Journal of Radioanalytical and Nuclear Chemistry 289, no. 2 (2011): 407–15. http://dx.doi.org/10.1007/s10967-011-1109-8.

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