Article
Environmental Sciences
Zhenghua Tao, Guogan Peng, Fengyuan Chen, Qingjun Guo, Rongfei Wei, Jingli Liu, Yanping Li, Hao Jiang, Yongyan Liao, Ke Pan
Summary: This study evaluated lead concentrations in three mangrove sediments adjacent to different land-use types and identified the sources of lead using lead isotopes. The data showed minor lead contamination in the sediments, possibly due to the lack of industrial development in the region. The lead isotopic ratios indicated that natural sources, coal combustion, agricultural activities, and traffic-related emissions contributed to the lead accumulation in the sediments, with coal combustion and agriculture being important anthropogenic sources of lead. Significant relationships were observed between the 206Pb/207Pb ratios and total organic content in the sediments, suggesting contrasting lead cycling in different mangrove environments. Organic matter and sulfur content were found to reduce lead mobility and bioavailability in the sediments. This study provides an isotopic method to investigate lead sources and migration in mangrove environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
N. N. Phuong, E. Dhivert, B. Mourier, C. Grosbois, J. Gasperi
Summary: This study investigates the distribution of microplastic pollution in sediments of the Villerest reservoir. The results show that the section with fine-grained sediments has significantly higher levels of microplastics compared to the section with coarse-grained sediments. The study also finds that the polymer diversity is higher in fine-grained sediments. This research contributes to a better understanding of the role of hydrosedimentary processes in microplastic distribution and provides valuable insights for sediment management operations.
Article
Geosciences, Multidisciplinary
Bo Peng, Albert Juhasz, Xiaohong Fang, Chunxia Jiang, Sicheng Wu, Xiaomin Li, Shurong Xie, Yanan Dai
Summary: In this study, the Pb isotopic composition of sediments from the Four Rivers' inlets to Dongting Lake in China was analyzed to identify the sources of Pb inputs. The results showed that anthropogenic Pb inputs were predominant in the sediments from the Xiangjiang river, while the sediments from the Zijiang, Yuanjiang, and Lishui rivers were influenced by both anthropogenic and lithological sources. The study also highlighted the usefulness of Pb isotopic tracing in identifying and differentiating Pb sources in diverse sediment samples.
Article
Environmental Sciences
Fen Xu, Rui Yang, Hong Wang, Xiaoxia He, Weiwei Li, Yao Wei, Linlin Bao, Jianfei Yuan, Hongjin Tong
Summary: Clarifying the sources and historical variation of metal(loid)s in agricultural river sediments is important for controlling watershed contamination and improving the environment. This study conducted a geochemical investigation of Pb isotopic characteristics and the distribution of metal(loid)s in sediments from an agricultural river in Sichuan Province, China. The results showed significant enrichment of Cd and Zn, with a large anthropogenic contribution, while As came mainly from natural sources. Cu, Cr, and Pb had mixed natural and anthropogenic sources. The anthropogenic origin of Cd, Zn, and Cu was closely related to agricultural activities.
Article
Engineering, Environmental
Qiaohui Zhong, Meiling Yin, Qiong Zhang, Jingzi Beiyuan, Juan Liu, Xiao Yang, Jin Wang, Lulu Wang, Yanjun Jiang, Tangfu Xiao, Zhaofeng Zhang
Summary: The study found significant Cd isotopic fractionation during lead-zinc smelting, with sediments showing extremely high Cd concentrations mainly derived from slag, indicating the potential of Cd isotopes as a new geochemical tool to distinguish anthropogenic sources and quantify their contributions in the environment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Geochemistry & Geophysics
Long-Fei Gou, Zhangdong Jin, Albert Galy, Yang Xu, Jun Xiao, Yibo Yang, Julien Bouchez, Philip A. E. Pogge von Strandmann, Chenyang Jin, Shouye Yang, Zhi-Qi Zhao
Summary: By systematically studying the seasonal riverine Mg-Sr isotopic pattern in the middle Yellow River based on samples collected weekly for the whole year of 2013, this research provides insights into the transport characteristics of stable metal isotopes in large rivers and their implications for present and past weathering. The results show that dissolved Mg in the river is mainly derived from silicate and carbonate sources, with limited evaporite contribution, and the isotopic composition is controlled by lithological mixing and prior calcite precipitation. Despite significant variations in temperature, hydrology, and precipitation seasonally, the mixing proportions of different Mg sources remain relatively constant, indicating the potential of dissolved Mg isotopes as a response to climatic forcing on a continental scale. The findings highlight the importance of sedimentary Mg isotope records in reflecting extreme conditions in geological time.
Article
Geosciences, Multidisciplinary
Shanshan Deng, Junqiang Xia, Xin Liu, Meirong Zhou, Yu Mao, Quanxi Xu
Summary: After the operation of the Three Gorges Project, the sediment transport in the Middle Yangtze River has shifted from upstream input to fluvial erosion and tributary input. Fine sediment mainly comes from upstream and tributaries, while coarse sediment primarily comes from bed and bank erosion. The river system has transformed from transport-limited to supply-limited, with future sediment supply rate decreasing due to river regulation works.
Article
Engineering, Environmental
Zhenghua Tao, Jian Hu, Qingjun Guo, Rongfei Wei, Linlin Jiao, Yanping Li, Fengyuan Chen, Bailing Fan, Wenlu Lan, Ke Pan
Summary: This study investigated the levels of lead contamination in mangrove sediments from the Maowei Sea in China using lead isotopes and partial extraction methods. The results showed that the lead in the sediments was primarily from anthropogenic and natural sources, and that the 204Pb isotope analysis revealed overlooked differences between these sources. The study also found differences in the contribution of different sources between the eastern and western parts of the Maowei Sea.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Geochemistry & Geophysics
Romain Millot, Philippe Negrel
Summary: The study demonstrates the important role of lithium isotope tracers in characterizing river basins, particularly in distinguishing between natural inputs and anthropogenic pollution. Different behavior of lithium in river weathering at different scales within the Loire River basin has been illustrated, suggesting potential applications of lithium isotopes in tracing weathering conditions and anthropogenic sources in urbanized watersheds.
APPLIED GEOCHEMISTRY
(2021)
Article
Environmental Sciences
Britta M. Voss, Timothy Eglinton, Bernhard Peucker-Ehrenbrink, Valier Galy, Susan Q. Lang, Cameron McIntyre, Robert G. M. Spencer, Ekaterina Bulygina, Zhaohui Aleck Wang, Katherine A. Guay
Summary: The sources of carbon in the Fraser River system vary spatially and temporally. Tributaries in the northern interior consistently contribute higher concentrations of dissolved organic carbon (DOC) to the main stem. The radiocarbon age of DOC exported from the Fraser River does not change significantly across seasons, indicating that there is modulation of heterogeneous chemical and isotopic signals during transit through the river basin. Dissolved inorganic carbon (DIC) concentrations are highest in the Rocky Mountain headwater region and in tributaries with high DOC concentrations, suggesting that DOC respiration plays a significant role in DIC in this basin. Overall, the cycling of DOC and DIC is closely linked in the river network, with active processing and transformation of carbon during transport.
Article
Environmental Sciences
Haiyan Fang, Zemeng Fan
Summary: The study utilized a multivariate mixing model and composite fingerprints to analyze sediment sources at five locations along the main channel of the Shouchang River. It was found that sediment mainly came from river beds, construction lands, forests, and paddy fields. The research highlighted the role of land use, topography, precipitation, and human activities in determining sediment sources and their variations, recommending enhanced supervision of road and bridge construction, laws to inhibit in-stream sand mining activities, and reducing the connectivity between paddy fields and channels.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Environmental Sciences
Yu Wang, Luyu Liang, Xinyi Chen, Yi Zhang, Fubin Zhang, Fei Xu, Tuo Zhang
Summary: Due to fast-paced urbanization, industrial sand mining activities have put immense pressure on the environment, particularly leading to severe environmental problems in aquatic ecosystems. However, there is still incomplete understanding of the impact of sand mining on the remobilization of heavy metals in river sediments. This study extensively investigated this effect in the Jialing River using various techniques and found that sand mining activities resulted in the accumulation and remobilization of lead and cadmium.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Engineering, Environmental
Ran Wen, Xiong Yang, Shuang He, Jian Wu, Hongmei Ge, Zheng Chi, Yafei Shi, Shulian Wang, Andrea R. Gerson, Kewu Pi
Summary: Sediments play a crucial role in the storage of heavy metals in river and lake waters, and their chemical makeup influences the movement of these elements within the ecosystem. Therefore, it is essential to remediate polluted sediments for the overall health of the ecological environment. This study proposes a simple method for extracting heavy metals from contaminated sediment using horizontal electroosmosis, and investigates the effect of different washing reagents and operational parameters. Citric acid and EDTA were found to be the most effective in removing Cd and Pb, respectively. After 13 days of electrokinetic washing, the removal ratio of Cd by citric acid was 77.0%, and that of Pb by EDTA was 88.3%. The decrease in various fractions of the heavy metals upon their removal from the polluted sediment was observed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Yutong Zhu, Yongzhen Chai, Chengbin Xu, Fei Guo
Summary: The study measured the concentrations of DDT and its metabolites in sediment samples from a highly developed agricultural region in the upper reaches of the Yangtze River. Non-carcinogenic hazard quotient for different age groups and excess lifetime cancer risk due to eating fish were evaluated. The results showed a high level of residual DDT in the region, mainly from historically used technical DDT in agriculture. Non-carcinogenic risk was acceptable, but 11 out of 19 sites showed unacceptable carcinogenic risk, suggesting notable health risks especially for children.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
John Chetelet, Brian Cousens, Craig E. Hebert, Thomas S. Jung, Lukas Mundy, Philippe J. Thomas, Shuangquan Zhang
Summary: Lead is a toxic element released from human activities. Pb stable isotope ratios can be used to determine sources and transport pathways. A study of terrestrial and aquatic biota from three areas in western Canada found a remarkable similarity in their Pb isotope composition. Comparisons with local atmospheric and geogenic Pb showed that biota values were most similar to atmospheric Pb, suggesting the importance of fossil fuels in transportation and power generation. Further research is needed to characterize bioavailable chemical species of Pb in aerosols and important emission sources in western Canada.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Haofan Xu, Alecos Demetriades, Clemens Reimann, Juan J. Jimenez, Juliane Filser, Chaosheng Zhang, S. Albanese, M. Andersson, R. Baritz, M. J. Batista, A. Bel-lan, M. Birke, D. Cicchella, B. De Vivo, W. De Vos, E. Dinelli, M. Duris, A. Dusza-Dobek, M. Eklund, V Ernstsen, P. Filzmoser, B. Flem, D. M. A. Flight, S. Forrester, M. Fuchs, U. Fugedi, A. Gilucis, M. Gosar, V Gregorauskiene, W. De Groot, A. Gulan, J. Halamic, E. Haslinger, P. Hayoz, R. Hoffmann, J. Hoogewerff, H. Hrvatovic, S. Husnjak, L. Janik, G. Jordan, J. Kirby, V Klos, F. Krone, P. Kwecko, L. Kuti, A. Ladenberger, A. Lima, J. Locutura, P. Lucivjansky, A. Mann, D. Mackovych, M. McLaughlin, B. Malyuk, R. Maquil, J. Matschullat, R. G. Meuli, G. Mol, P. Negrel, P. O'Connor, K. Oorts, A. Pasieczna, V Petersell, S. Pfleiderer, M. Ponavic, C. Prazeres, U. Rauch, S. Radusinovic, M. Sadeghi, I Salpeteur, R. Scanlon, A. Schedl, A. Scheib, I Schoeters, E. Sellersjo, I Slaninka, J. M. Soriano-Disla, A. Sorsa, R. Svrkota, T. Stafilov, T. Tarvainen, V Trendavilov, P. Valera, V. Verougstraete, D. Vidojevi, A. Zissimos, Z. Zomeni
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Geochemistry & Geophysics
Philippe Negrel, Wolfram Kloppmann
Article
Geochemistry & Geophysics
Philippe Negrel, Romain Millot, Emmanuelle Petelet-Giraud, Gerard Klaver
APPLIED GEOCHEMISTRY
(2020)
Article
Geochemistry & Geophysics
Anne-Marie Desaulty, Sebastien Perret, Nicolas Maubec, Philippe Negrel
APPLIED GEOCHEMISTRY
(2020)
Article
Geochemistry & Geophysics
Romain Millot, Philippe Negrel
Summary: The study demonstrates the important role of lithium isotope tracers in characterizing river basins, particularly in distinguishing between natural inputs and anthropogenic pollution. Different behavior of lithium in river weathering at different scales within the Loire River basin has been illustrated, suggesting potential applications of lithium isotopes in tracing weathering conditions and anthropogenic sources in urbanized watersheds.
APPLIED GEOCHEMISTRY
(2021)
Article
Geochemistry & Geophysics
Philippe Negrel, Anna Ladenberger, Clemens Reimann, Manfred Birke, Alecos Demetriades, Martiya Sadeghi
Summary: The geochemical behavior of Mg in European agricultural soil was investigated, revealing the key role of glacial sediments and parent rock lithology in determining the Mg nutritional status.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Geochemistry & Geophysics
Philippe Negrel, Emmanuelle Petelet-Giraud, Catherine Guerrot, Romain Millot
Summary: The Ebro River, one of the largest contributors of freshwater to the Mediterranean, flows through carbonate rocks and evaporites in its basin. Variations in Ca and Sr isotopes reflect the sources and geochemical processes of the river and its tributaries.
Article
Geochemistry & Geophysics
Lise Cary, Angelie Portal, Gabriel Billon, Marc Parmentier, Veronique Alaimo, Aurelie Bouvet-Swialkowski, Philippe Negrel
Summary: Groundwater in northern France contains fluctuating selenium concentrations, sometimes exceeding the European drinking-water limit. The study reveals that geology, redox processes, and pumping activities impact selenium cycling, with pyrite playing a predominant role in selenium mobility within the Chalk aquifer. Multiple redox cycles of selenium and other elements occur, resulting in a selenium-rich redox front that migrates downward over time.
Article
Geochemistry & Geophysics
Philippe Negrel, Anna Ladenberger, Clemens Reimann, Alecos Demetriades, Manfred Birke, Martiya Sadeghi
Summary: Carbonate rocks can dissolve and export elements in dissolved form, and precipitation of secondary phases can occur. The chemical signature in soil can be quantified and classified by geochemical indices to evaluate chemical weathering trends. Special adaptations of classical indices are necessary to interpret weathering trends in carbonate-derived soil and distinguish weathering grades of source-rock types at a continental scale.
GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
(2022)
Article
Geochemistry & Geophysics
Blandine Gourcerol, Guillaume Bertrand, Laurent Bailly, Pauline Moreau, Isabelle Duhamel-Achin, Maxime Picault, Philippe Negrel
Summary: In the European-Peruvian ION4RAW project, a geographical inventory of selected elements was assessed to develop mineral-processing technology for the recovery of by-products from primary Cu-Ag-Au deposits. The existing databases are incomplete, and the DataBase Querying (DBQ) method and a new approach were used to address this gap. The new approach, based on clustering elements known to occur in different metallogenic families, helped identify areas of interest in Europe for exploration of the targeted by-products.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Water Resources
Feifei Cao, Jessy Jaunat, Frederic Huneau, Philippe Negrel, Emilie Garel, Alexandra Mattei, Helene Celle, Patrick Ollivier
Summary: The objectives of this study were to characterize the input signal and mineralization processes of a shallow carbonate aquifer in northeastern France by analyzing the chemical and isotopic composition of rain and groundwater. The results showed that groundwater isotopic signatures were similar to the local meteoric water line and were influenced by the buffer effect of the chalk aquifer. However, intensive fracture networks at local scale could lead to rapid aquifer response to rainfall.
HYDROLOGICAL SCIENCES JOURNAL
(2022)
Editorial Material
Environmental Sciences
J. Melleton, S. Belbeze, Ph Negrel, J-F Brunet, G. Vic, P. Auger, M. Chevillard, V Laperche
Article
Engineering, Civil
Daniel S. Moreno Martin, Philippe Ackerer, Frederick Delay, Daniel Viville, Philippe Negrel, Francois Chabaux
Summary: This study evaluates the hydrological information obtained from spring water temperature variations in shallow and thin aquifers of headwater catchments through analysis and interpretation of temperature data from 2013 to 2017 at the Strengbach Critical Zone Observatory (CZO). The results show that heat transfer in the shallow subsurface is mainly controlled by thermal conduction rather than fluid flow. The study suggests that spring water temperature variations could be used to identify saturated water content and its spatial variability at the catchment scale.
JOURNAL OF HYDROLOGY
(2023)
Article
Geochemistry & Geophysics
L. Ledieu, A. Simonneau, O. Cerdan, P. Negrel, V Laperche, C. Grosbois, F. Laggoun-Defarge
APPLIED GEOCHEMISTRY
(2020)
Proceedings Paper
Geochemistry & Geophysics
Romain Millot, Joachim Tremosa, Philippe Negrel
16TH INTERNATIONAL SYMPOSIUM ON WATER-ROCK INTERACTION (WRI-16) AND 13TH INTERNATIONAL SYMPOSIUM ON APPLIED ISOTOPE GEOCHEMISTRY (1ST IAGC INTERNATIONAL CONFERENCE)
(2019)
