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Distribution of trace metals and Pb isotopes in bottom sediments of the Murucupi River,North Brazil

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International Journal of Sediment Research 2016年第3期31卷 226-236页

作者： Diomar Cavalcante Oliveira Jean Michel Lafon Marcelo de Oliveira Lima Institute of Geosciences Federal University of Pára Environmental Section Evandro Chagas Institute

The Murucupi River belongs to the hydrographic network of the Para River estuary,at the southern portion of the Amazon River mouth,which consists of a fluvial-marine transitional zone under strong impact of both tidal and fluvial *** geochemical results obtained for bottom sediments from the Murucupi River,the Arrozal Channel,and the Para River indicate a natural variation of Pb,Cr,Cu,Zn,and Ni content among these water ways with no significant anthropogenic *** to the threshold effects level(TEL),the contents of trace metals do not offer risk to the local *** contrast,the differences in the Pb isotopic composition of sediments in the Murucupi River,the Arrozal Channel,and the Para River are *** isotopic signatures indicate an anthropogenic contribution of Pb in the Murucupi River originating from the domestic effluents of urban centers;industrial waste represented by red mud is not *** results demonstrate that the Pb isotopic signature is a prospective indicator for future contamination of bottom sediments by trace metals and is useful for identifying contaminants among the possible anthropogenic sources.

关键词： bottom sediments Pb isotopes Trace metals Murucupi River Barcarena

Temporal Changes in Transboundary Air Pollutants in bottom sediments of Lakes in East Asia

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Journal of Environmental Science and Engineering(B) 2013年第11期2卷 629-639页

作者： Shlntaro Mura Ryosuke Sato Masaki Hashimoto Akiko Murakami-Kitase Hideo Yamazaki Shusaku Yoshikawa Ju-Yong Kim Kazuo Kamura Faculty of Science and Engineering Waseda University Tokyo 169 8555 Japan Mitsubishi Materials Corporation Fukushima 971 8101 Japan Faculty of Science and Engineering Kinki University Osaka 577 8502 Japan Graduate School of Science Osaka Sity University Osaka 558 8585 Japan Korean Institute of Geoscience and Mineral Resources Gwahangro Yuseong-gu Daejeon Metropolitan City Korea

To clarify temporal changes in the transboundary pollution, we analyzed SCPs （spheroidal carbonaceous particles） in bottom sediments of lakes in China, South Korea and Japan. SCPs provide an unambiguous record of anthropogenic atmospheric pollution in bottom sediments. Recently deposited SCPs in air and unmelted snow on Mt. Fuji were also characterized. The concentrarion and characteristics of SCPs reflected the environmental and industrial history of the area. Evidence of transboundary air pollution was observed after the 1980s in Yashagaike and Kotaniike ponds in Japan, which are located on the coast of the Sea of Japan. The concentration suggests that the pollutants originated from continental Asia, particularly after the 1980s. The chemical composition of the SCPs allowed the source of emissions to be identified. Chinese SCPs were found at Yashagaike and Kotaniike ponds in Japan, and at Songiiho and Urimji lakes in Korea. The size distributions showed that small SCPs are transported over long distances. On the summit of Mr. Fuji, SCPs transported by the prevailing westerlies from China were found in addition to SCPs emitted in Japan.

关键词： bottom sediments transboundary air pollution SCPs.

Hygienic Quality of Fish Depending of Cadmium （Cd） and Lead （Pb） Content in bottom sediments of Water Reservoirs Kolinany

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Journal of Food Science and Engineering 2013年第3期3卷 156-160页

作者： Klaudia Halfiszova Tomas Toth Jaroslav Andreji Lenka Gresova Department of Landscape Planning and Ground Design Faculty of Horticulture and Landscape Planning Slovak University ofAgriculture Nitra 93401 Slovakia Department of Chemistry Faculty of Biotechnology and Food Sciences Slovak University of Agriculture Nitra 93401 Slovakia Department of Poultry Science and Small Farm Animals Faculty of Agrobiology and Food Resources Slovak University ofAgriculture Nitra 93401 Slovakia

Analysis of bottom sediments in water reservoir Kolifiany from the aspect of Cd and Pb contents, the determination of observed heavy metal contents in different parts of carp body （meat muscle, liver and kidney） and the evaluation of hygienic status and suitability of fish meat for the human consumption were performed. For analysis, each tissue sample was dissolved in a solution of nitric acid p.a. （HNO3：HzO = 2：1）; sediment sample in solution of acids （HF-HNO3-HCIO4） and analyzed for presence of Cd, Pb by the atomic absorption spectrophotometer （AAS） Varian Duo 240FS and 240Z. Our results confirmed hygienic harmless of bottom sediments in water reservoir Kolifiany. The Cd, Pb contents in sediments represent no risk within their input into the fish organisms. The Cd content in fish meat is lower than maximum available amount given by legislative norms, and the contents of Pb in fish meat too. The results of Cd, Pb content determination in carp body confirmed that fish muscles belong to suitable foodstuff for the human consumption.

关键词： Hygienic quality cadmium lead bottom sediments fish.

Heavy Metals in Water and bottom sediments of Odessa Region of the Black Sea

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Journal of Shipping and Ocean Engineering 2015年第2期5卷 51-58页

作者： Sergey Yevgenevich Dyatlov Institute of Marine Biology Ukrainian National Academy of Sciences Odessa 65011 Ukraine

The paper presents the results of a comprehensive monitoring of the polygon：＂Odessa Region, north-western part of the Black Sea＂ for the period 2009-2011. It is shown that most of the copper and nickel is brought into the sea from the catchment area, and zinc and cadmium are mainly of the autochthonous origin. It is found that in 2010, after heavy rains, the area of bottom sediments contaminated by copper and nickel was increased. The main source of copper in the sea is vast vineyards.

关键词： Odessa Region of the Black Sea water bottom sediments heavy metals spatial distribution G1S-based map technology.

Features of ^(90)Sr behavior in Crimean lakes with different salinity of their water environment

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Acta Geochimica 2023年第1期42卷 89-102页

作者： N.Yu.Mirzoeva S.I.Arkhipova V.Yu.Proskurnin O.N.Miroshnichenko I.N.Moseichenko A.O.Kovalevsky Institute of Biology of the Southern Seas of RAS SevastopolRussian Federation

The comparative study of technogenic ^(90)Sr behavior features in Crimea lakes’ ecosystems with different levels of salinity was carried out in *** sources of ^(90)Sr input were identified for all the studied lakes:the primary source concerned with atmospheric fallout immediately after the Chernobyl NPP accident and the secondary long-term input of this radionuclide by *** half-life of the ^(90)Sr concentration in the water of the hypers aline Lake Sasyk-Sivash was estimated to vary from 0.8 to 1.1 years after the closure of the North Crimean Canal(NCC).Biogeochemical processes in the lake under the absence of the secondary source of the radionuclide input were shown to decrease in the ^(90)Sr residence time in the water column by 131 *** brackish water bodies,a significant factor influencing the radionuclide concentration in ecosystems of lakes was the pH of their water,while for hypers aline lakes the level of water salinity was the main factor determining ^(90)Sr *** concentration of ^(90)Sr in bottom sediments of studied lakes depended mainly on this radionuclide concentration in a water *** ^(90)Sr distribution factors(Kd) for studied lakes’ bottom sediments varied in a range of n·10^(0)÷n·10^(2) for hypersaline lakes and of n·10^(1)÷n·10^(2) for lakes with brackish *** to the closure of the NCC,the ^(90)Sr redistribution took place in lake ecosystems only under the geochemical processes within the water bodies *** results obtained in this work are of particular importance as a starting point or a basis for further radioecological studies of the Crimean inland waters after the reopening of the NCC and the Dnieper waters re-entering the territory of Crimea in 2022after the 8 years of their absence.

关键词： ^(90)Sr Salt lakes Water bottom sediments Chernobyl NPP accident Crimea

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Impact of environmental variables on spatial and seasonal internal phosphorus loading in a mesoeutrophic lake

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International Journal of Sediment Research 2019年第1期34卷 14-26页

作者： Katarzyna Kowalczewska-Madura Ryszard Go?dyn Julia Bogucka Katarzyna Strzelczyk Department of Water Protection Faculty of BiologyAdam Mickiewicz University

Strzeszynskie Lake was formerly a slightly eutrophic（meso-eutrophic） water body. The aim of the current research was to define variables on both spatial and seasonal internal phosphorus loading from bottom sediments at five stations located in zones varying in depth, oxygenation, macrophyte presence,and uses of the neighboring catchment area. Ex situ experiments done with the use of intact bottom sediment cores have shown that the highest phosphorus release occurred in the deepest part of the lake and reached 3.6 mg P/m2d under anoxic conditions during summer thermal stratification. In turn, the internal loading from littoral sediments, which were well aerated all year round, was clearly ***, phosphorus accumulation in the bottom sediment was observed to reach a maximum of 1.45 mg P/m2d in autumn. A comparison of the internal loading intensity in lake zones with different land uses of the neighboring catchment area has shown slightly higher values at stations adjacent to the forest catchment area than those used for recreation. Changes in the land use of the catchment area of Strzeszynskie Lake, especially the increase in impermeable surfaces, have led to an increased inflow of external loads after heavy rains, resulting in deterioration in water quality and a delayed increase in internal loading.

关键词： bottom sediments Interstitial water bottom water Internal loading Sediment-water interface

Sea Trials of a Wave Energy Converter in Strangford Lough, Northern Ireland

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Journal of Shipping and Ocean Engineering 2013年第1期3卷 11-20页

作者： Vladimir Krivtsov Ian Bryden Brian Linfoot obin Wallace The University of Edinburgh Kings Buildings Edinburgh EH9 3JN Scotland UK SBE Heriot-Watt University Edinburgh EH14 4AS UK Department of Ecology Kharkov State University 4 Svobody Square Kharkov 310077 USSR Ukraine

This paper describes a campaign of WEC （wave energy converter） testing and presents a selection of the results related to the measured motions and mooring tensions. A 1：20 physical model has been successfully deployed using a three point mooring installed at sea （Strangford Lough, NI） in 10 m depth. In calm weather the overall dynamics of mooring tensions is dominated by the tidal cycle due to the progressive lifting of the heavy chain with the increase in water depth on the flood and gradual lowering on the ebb. In flesh winds the dynamics is very complex, but can be studied with the aid of mathematical modelling. A simulation model was used to assess the dynamics of the mooring lines, and the results of open water tests have been compared with the model＇s performance. The results indicate that, in general, the model shows a reasonable agreement with the observations. The WEC＇s motions and the measured loads on the leading mooring line appear to relate to the concurrent environmental conditions. The data obtained can therefore be used for the model＇s calibration and further improvements, which is valuable for improving the WEC＇s design and operational characteristics. This may be important not only in relation to the issues of reliability and power take off, but also in terms of minimising the adverse effects of mooring lines on bottom sediments, as well as indirect effects of the eroded particles on a wide range of aquatic processes.

关键词： bottom sediments mooring loads meteorological data model simulations optimisation Orcaflex CRESS wind waves.

Geochemical Studies and Elemental Contaminants in the Bay of the City of Asuncion

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Journal of Chemistry and Chemical Engineering 2013年第11期7卷 1060-1067页

作者： Juan F. Facetti-Masulli Franklin Flores Peter Kump National University of Asunci6n-Hydroconsult Asunci6n 980 Paraguay Jozef Stefan Institute Ljubljana I000 Slovenia

Minor and trace elements composition of bottom sediments from the bay of Asunci6n on the Paraguay River have been investigated by XRF （X-ray fluorescence） techniques to determine their correlation as well as provenance. The analysis of complex spectra was performed by the AXIL software and the quantitative analysis by the QAES （quantitative analysis of environmental samples ） software. Analyzed trace elements were the refractory elements Rb, Sr, Y, Zr, Nb, Ba, La, Ce, Pr, Nd, Zr, Th and others with high field stabilization energy as Cr, Ni, Cu, together with Zn, As, Cd, Pb. Minor elements were Ti, Mn, Fe which are often to the above refractories related. According to their normalized spidergrams, two sets of sediments can be differentiated. Those that show LREE （light rare earth elements） enrichment, negative Nb and Ti anomalies and no spike at Zr and those that have spidergrams very alike, with strong negative anomalies at Nb, Nd and Ti whereas a of Fe versus the refractory elements except Fe-Zr in which correlation seem to be low. positive spike at Zr. In both set, there are strong correlations is negative. Potential hazards of toxic elements in sediments

关键词： bottom sediments Asuncion Bay XRF LREE Paraguay River.