Article
Environmental Sciences
Wenwen Zhao, Yuan Xin, Zhongsheng Zhang, Xuehui Zhang, Haitao Wu
Summary: Little is known about the coupling between mercury (Hg) methylation and soil organic matter decomposition in degraded permafrost in high northern latitudes where climate warming is occurring rapidly. In this study, we conducted an anoxic warming incubation experiment for 87 days to explore the interactions between soil organic matter (SOM) mineralization, dissolved organic matter (DOM), and methylmercury (MeHg) production. The results revealed significant promotion effects of warming on MeHg production, as well as increased greenhouse gas emissions and enhanced DOM fluorescence intensities. These findings highlight the complex relationships between warming, greenhouse gas emissions, and MeHg production in permafrost marshes.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Zelin Shen, Guangliang Liu, Yingying Guo, Tao Jiang, Yanwei Liu, Jianbo Shi, Ligang Hu, Yongguang Yin, Yong Cai, Guibin Jiang
Summary: The aging kinetics of divalent mercury (Hg(II)) mediated by dissolved organic matter (DOM) play a significant role in controlling Hg(II) transformation and bioavailability in natural aquatic environments. However, the differential behaviors of new and aged Hg(II) in the same reaction system remain unknown. This study used multi-isotope tracing to investigate the impacts of binding site and sulfidation during DOM-mediated Hg(II) aging processes on Hg(II) reduction and microbial methylation in the same reaction system.
Article
Environmental Sciences
V Mangal, W. Y. Lam, H. Huang, E. J. S. Emilson, R. W. Mackereth, C. P. J. Mitchell
Summary: This study investigates the molecular composition of dissolved organic matter (DOM) and its relationship with mercury transport and transformations. High-resolution mass spectrometry is used to characterize DOM compound classes, DOM aromaticity, and the nominal oxygenation state of carbon across thirteen small boreal forest streams in central Canada. The results show significant differences in the abundance and classes of DOM compounds correlated with inorganic mercury and methylmercury concentrations across seasons and between mercury forms. Nitrogen and sulfur containing DOM compounds are most often positively correlated with inorganic mercury concentrations in late spring, while low-oxidized lignins are more important in fall. Low-oxidized lignins and hydrolysable tannins account for a large proportion of DOM-MeHg correlations, regardless of season. The study also reveals that the strongest correlations between inorganic mercury and DOM occur across a wide range of carbon oxygenation states, suggesting that DOM involved in inorganic mercury transport encompasses a wide range of polarities and thermodynamic stabilities. In contrast, DOM molecules exclusively correlated with MeHg concentrations have more positive carbon oxygenation states and aromatic qualities, indicating preferential transport of MeHg with more stable and aromatic DOM molecules. DOM molecules correlated with both inorganic mercury and MeHg concentrations are only found in late spring.
Article
Environmental Sciences
Zhengyu Wu, Zhike Li, Bo Shao, Yiyan Zhang, Wei He, Yiren Lu, Kair Gusvitskii, Yingxin Zhao, Yurong Liu, Xuejun Wang, Yindong Tong
Summary: The input of mercury (Hg) into ecosystems has increased significantly since the industrial revolution, and methylmercury (MeHg) is the most concerning species in aquatic ecosystems due to its neurotoxicity and ability to bioaccumulate in the food chain. Dissolved organic matter (DOM) plays a crucial role in the transformation of aquatic Hg. This study collected water samples from 373 sites globally and found that Hg availability was the dominant factor influencing MeHg concentration in water, followed by DOM.
Article
Environmental Sciences
Zhou Liang, Robert T. Letscher, Angela N. Knapp
Summary: Surface ocean bulk and semi-labile dissolved organic matter (DOM) stoichiometry vary across ocean regions with global means of 387:26:1 and 179:20:1, respectively. Surface ocean DOC:DOP and DON:DOP concentration ratios are more variable than DOC:DON concentration ratios. Surface ocean gradients in P-depleted DOM stoichiometries in the Pacific and Atlantic basins reflect variable nutrient stress.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Ecology
Laura Balzer, Carluvy Baptista-Salazar, Sofi Jonsson, Harald Biester
Summary: This study investigated the relationship between total mercury (THg) and monomethylmercury (MeHg) in sinking seston and chemical changes. The results showed that MeHg proportions were highest in oxygen super saturation at the water surface and at the oxic-suboxic redox boundary. The concentrations of MeHg and THg in seston were strongly influenced by the decomposition of algal biomass in shallow eutrophic lakes.
Article
Environmental Sciences
Zhenwei Yan, Na Yang, Zhou Liang, Maojun Yan, Xiaosong Zhong, Yu Zhang, Wenqi Xu, Yu Xin
Summary: Large rivers like the Yellow River play a crucial role in the cycling of dissolved organic nitrogen (DON), with DON<1kDa dominating the DON pool and correlating inversely with dissolved inorganic nitrogen (DIN). Geographical features and microbial communities are closely related in driving DON cycling, highlighting the importance of DON mineralization in carbon cycling in marginal seas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Hewen Niu, Shichang Kang, Chandan Sarangi, Guotao Zhang, Mengxue Chen, Yuzhong Zhang, Huili Qin
Summary: This study systematically determines the organic and inorganic constituents in water bodies of the cryosphere region in the eastern Tibetan Plateau and finds that high-elevation water bodies have lower organic carbon content. Additionally, it suggests that atmospheric deposition and anthropogenic activities contribute to the observed patterns in organic carbon and nitrogen content.
Article
Environmental Sciences
Siqi Zhang, Mingxing Wang, Jiang Liu, Shanyi Tian, Xueling Yang, Guangquan Xiao, Guomin Xu, Tao Jiang, Dingyong Wang
Summary: This study investigates the impact of biochar on the mercury (Hg) cycle in rice paddies using insights from soil dissolved organic matter (DOM). The results show that adding biochar can significantly reduce the bioaccumulation of methylmercury (MeHg) in rice plants and increase the aromaticity and molecular weight of DOM. However, biochar addition can also enhance microbial activity and MeHg production in the soil.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2022)
Review
Environmental Sciences
Jin Zhang, Chengjun Li, Wenli Tang, Mengjie Wu, Mingying Chen, Huan He, Pei Lei, Huan Zhong
Summary: Wetlands are important areas for studying mercury (Hg) biogeochemistry and have attracted global attention. A literature analysis of 15,813 publications on Hg in wetlands was conducted, revealing the changing focus of research over time. The research priorities for future studies include understanding the factors controlling methylmercury (MeHg) production, demethylation processes, bioaccumulation, and the role of wetlands in Hg circulation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Peidong Xu, Lei Shi, Xin Yang, Haoming Yang, Kuanhu Dong, Changhui Wang
Summary: Soil dissolved organic matter (DOM) plays a critical role in regulating the cycling of terrestrial biogeochemistry. N addition significantly increased soil DOM concentration, with a greater impact on dissolved organic nitrogen (DON) than dissolved organic carbon (DOC). The level of N addition was positively correlated with soil DOC and DON concentrations, and the influence of N addition on soil DOC concentration decreased with higher initial soil total nitrogen (TN). Mean annual precipitation (MAP) facilitated the leaching out of soil DON and had a negative impact on its concentration under N addition. Increased soil depth and initial soil pH affected the soil DOC and DON concentrations, with DOC accumulating in the top soil and DON leaching to deeper soil. This study provides a mechanistic understanding of the influence of N addition on terrestrial ecosystem C and N dynamics at the regional scale.
LAND DEGRADATION & DEVELOPMENT
(2023)
Article
Environmental Sciences
Ting Sun, Zoe Lindo, Brian A. A. Branfireun
Summary: Climate change-driven ground warming will alter mercury cycling processes in high boreal and subarctic peatlands, particularly increasing MeHg production in subarctic peatlands. Increased soil temperature promotes microbial metabolism and organic matter turnover, resulting in higher concentrations of MeHg in the water.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Environmental Sciences
Dandan Duan, Pei Lei, Wenlu Lan, Tianshen Li, Hao Zhang, Huan Zhong, Ke Pan
Summary: This study investigated the concentrations of total mercury and methylmercury in sediments from seven mangrove forests in China, finding that litterfall plays a significant role in regulating the levels of mercury. The organic matter in the sediments was predominantly derived from litterfall, influencing the accumulation of MeHg. Furthermore, the addition of mangrove litter stimulated the production of MeHg under anaerobic conditions, suggesting that litterfall acts as a source of inorganic Hg and labile carbon, facilitating Hg methylation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Tao Sun, Qing Xie, Chuxian Li, Jinyong Huang, Caipeng Yue, Xuejie Zhao, Dingyong Wang
Summary: Both inorganic and organic fertilizers increase the concentration of methylmercury (MeHg) in rice grains, but through different mechanisms. Inorganic fertilizers enhance mercury methylation by increasing the bioavailability of mercury and the relative amount of Hg-methylating microbes. In contrast, organic matter in organic fertilizers is the main driver for the increase in MeHg concentrations in rice grains and can also immobilize mercury in soil.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Tao Sun, Yongmin Wang, Chuxian Li, Jinyong Huang, Yingpeng Hua, Caipeng Yue, Hongbo Cha, Yongjiag Zhang, Dingyong Wang
Summary: The size of straw incorporation affects the accumulation of methylmercury in rice grains, with powdered straw reducing the accumulation by regulating the release of organic matter fractions in paddy soil and restraining net Hg methylation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Heleen A. de Wit, Kari Austnes, Gro Hylen, Lise Dalsgaard
Article
Environmental Sciences
Katherine H. Langford, Malcolm J. Reid, Eirik Fjeld, Sigurd Oxnevad, Kevin V. Thomas
ENVIRONMENT INTERNATIONAL
(2015)
Article
Environmental Sciences
Amanda E. Poste, Hans Fredrik Veiteberg Braaten, Heleen A. de Wit, Kai Sorensen, Thorjorn Larssen
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2015)
Article
Environmental Sciences
Tatiana Ivanovna Moiseenko, Marina Ivanovna Dinu, Maria Mihailovna Bazova, Heleen A. de Wit
WATER AIR AND SOIL POLLUTION
(2015)
Article
Environmental Sciences
Heleen A. de Wit, Jose L. J. Ledesma, Martyn N. Futter
Article
Environmental Sciences
Clara E. Moreno, Eirik Fjeld, Espen Lydersen
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2016)
Article
Environmental Sciences
Merete Grung, Karina Petersen, Eirik Fjeld, Ian Allan, Jan H. Christensen, Linus M. V. Malmqvist, Sondre Meland, Sissel Ranneklev
SCIENCE OF THE TOTAL ENVIRONMENT
(2016)
Article
Environmental Sciences
Asle Okelsrud, Espen Lydersen, Eirik Fjeld
SCIENCE OF THE TOTAL ENVIRONMENT
(2016)
Article
Environmental Sciences
Asle Okelsrud, Espen Lydersen, Clara Moreno, Eirik Fjeld
SCIENCE OF THE TOTAL ENVIRONMENT
(2017)
Article
Environmental Sciences
Christopher Harman, Merete Grung, Jasmina Djedjibegovic, Aleksandra Marjanovic, Eirik Fjeld, Hans Fredrik Veiteberg Braaten, Miroslav Sober, Thorjorn Larssen, Sissel Brit Ranneklev
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2018)
Article
Environmental Sciences
Hans Fredrik Veiteberg Braaten, Heleen A. de Wit, Thorjorn Larssen, Amanda E. Poste
SCIENCE OF THE TOTAL ENVIRONMENT
(2018)
Article
Limnology
Clara E. Moreno, Eirik Fjeld, Min K. Deshar, Espen Lydersen
JOURNAL OF LIMNOLOGY
(2015)
Article
Multidisciplinary Sciences
Anders G. Finstad, Tom Andersen, Soren Larsen, Koji Tominaga, Stefan Blumentrath, Heleen A. de Wit, Hans Tommervik, Dag Olav Hessen
SCIENTIFIC REPORTS
(2016)
Article
Environmental Sciences
Marianne Olsen, Eirik Fjeld, Espen Lydersen
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Merete Grung, Sondre Meland, Anders Ruus, Sissel Ranneklev, Eirik Fjeld, Alfhild Kringstad, Jan Thomas Rundberget, Majbrit Dela Cruz, Jan H. Christensen
Summary: The study found that sedimentation ponds are hotspots for urban and traffic related contaminants, with a clear transport of polycyclic aromatic compounds (PACs) and polybrominated diphenyl ethers (PBDEs) to organisms. PACs and PBDEs in water and sediment can be transported to organisms, especially fish.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)