Article
Engineering, Environmental
Chenghao Yu, Maodian Liu, Junming Guo, Huiming Lin, Yunyun Yan, Qianru Zhang, Menghan Cheng, Yifan Lu, Xuejun Sun, Xuejun Wang, Xiangliang Pan
Summary: The Yellow River, a high-sediment river, releases significant amounts of mercury and methylmercury into the Bohai Sea. Sediment regulation can increase mercury flux to the ocean, while water diversion has a minimal impact on mercury flux. This study highlights the importance of understanding mercury transport and its impacts on coastal ecosystems.
Article
Environmental Sciences
Shuhan Xin, Bingbing Wang, Yin Yuan, Shiliang Wang
Summary: The study measured the content of total mercury (THg) and methylmercury (MMHg) in Nansi Lake and its inflow river estuaries, and investigated their spatial distribution characteristics and geochemical relationships with sediment mineral phases. The THg and MMHg contents in the lake sediment were lower than those in the inflow river estuary sediment, indicating that the inflow rivers are the primary source of THg and MMHg in Nansi Lake. The distribution of THg and MMHg showed different spatial variations in the sediment, and their relationships with sediment characteristics differed between the estuary and lake sediment.
Article
Marine & Freshwater Biology
Yongjie Wang, Zhigang Wang, Xiangmin Zheng, Limin Zhou
Summary: The study found that the invasion of Spartina alterniflora facilitates mercury storage in wetland sediments, affects sulfur cycling, but has similar effects on MeHg production compared to native plants in the Yangtze River estuarine wetlands.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Environmental Sciences
Chenghao Yu, Wenjie Xiao, Yunping Xu, Xuejun Sun, Mingyue Li, Huiming Lin, Yindong Tong, Han Xie, Xuejun Wang
Summary: Mercury, especially in the form of methylmercury, is a global pollutant with aquatic products being a major source of human exposure. The Bohai and Yellow seas in China have experienced an increase in THg levels over the years with a decrease in Yellow River THg input. Higher MeHg levels were found in surface sediments of the Bohai and Yellow seas compared to the East China Sea, with extremely high levels in the Yellow Sea Cold Water Mass area, suggesting potential ecological and human health risks in the region.
Article
Environmental Sciences
Geoffrey Millard, Chris S. Eckley, Todd P. Luxton, David Krabbenhoft, Jennifer Goetz, John McKernan, John DeWild
Summary: This study measured mercury methylation and demethylation rates using stable isotope tracers in sediments and water of a shallow branch of the Nacimiento Reservoir. The results showed high methylmercury concentrations in the hypolimnetic waters and higher methylation rates in littoral sediments during late summer. Modelled results indicated that the remaining hypolimnetic methylmercury could originate from profundal sediments, highlighting the importance of addressing methylation in both the water column and sediment for remediation strategies.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Byran C. Fuhrmann, Marc W. Beutel, Peggy A. O'Day, Christian Tran, Andrew Funk, Sarah Brower, Jeffery Pasek, Mark Seelos
Summary: This study investigated the seasonal patterns of MeHg cycling in a sulfate-rich, hypereutrophic reservoir using microcosm incubations. Results showed that aeration and SRB inhibitor decreased MeHg concentration, while methanogenic inhibitor increased MeHg concentration. The addition of organic carbon and microbial inhibitors also had significant impacts on MeHg concentration.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
R. P. Mason, M. Coulibaly, G. Hansen, H. Inman, P. K. Myer, K. M. Yao
Summary: Artisanal and small-scale gold mining, energy production, and other industrial inputs are a major source of anthropogenic mercury in aquatic environments. This study focuses on the understudied estuarine waters of Cote d'Ivoire and suggests that the local population may be exposed to unsafe levels of methylmercury through fish consumption. The findings highlight the importance of addressing local sources of mercury contamination and the transportation of mercury used in gold mining activities.
Article
Environmental Sciences
Dhiraj Kumar Chaudhary, Mark Xavier Bailon, Hwansuk Kim Bullet, Danny Reible Bullet, Yongseok Hong
Summary: This study investigated the effectiveness of in situ sediment capping as a remediation option for mercury-contaminated sediments in the Hyeongsan River estuary, South Korea. The results showed that using activated carbon and zeolite as sorbents, as well as sand as a passive cap, can potentially reduce the concentrations of total mercury and methylmercury in sediments.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Engineering, Environmental
Maxime Leclerc, Dominic E. Ponton, Francois Bilodeau, Dolors Planas, Marc Amyot
Summary: Compared to traditional hydropower plants, run-of-river (ROR) power plants have smaller impounded areas but can still have significant impacts on mercury cycling. This study found that ROR impoundment creates favorable environments for periphyton growth, which can contribute to the bioaccumulation of monomethylmercury (MMHg). The flooding also leads to changes in trophic structures and higher MMHg concentrations in flooded areas.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Laurie A. Hall, Isa Woo, Mark Marvin-DiPasquale, John Y. Takekawa, David P. Krabbenhoft, Donald Yee, Letitia Grenier, Susan E. W. De La Cruz
Summary: Differences in sediment biogeochemistry among tidal marsh features can result in spatial variation in MeHg production. The MeHg concentrations in sediments and water do not necessarily match those in consumer tissues, possibly due to differences in behavior and physiology among consumers.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Jihee Kim, Sae Yun Kwon, Kitae Kim, Seunghee Han
Summary: This study estimated the major sources and sinks of total mercury (THg) and methylmercury (MeHg) in Kongsfjorden using the SERAFM model. The model was calibrated based on the physical properties of the fjord, Hg runoff coefficients, transformation rate constants, etc., and validated against measured data. The results showed that tidal inflow and glacial runoff were the main sources of THg, while tidal inflow and in situ methylation in shallow halocline water were the main sources of MeHg.
MARINE POLLUTION BULLETIN
(2022)
Article
Engineering, Environmental
Xiaoquan Liu, Yingjun Wang, Zheng Li, Yue Song, Yanbin Li, Yongguang Yin, Yong Cai
Summary: Riverine mercury is a major source of mercury in coastal oceans, and the Yellow River is the main contributor to mercury contamination in the Bohai Sea. Suspended particulate matter plays a dominant role in the transport of mercury in the river-estuary system. The study highlights distinct patterns in the distribution and transport of total mercury and methylmercury.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Chenghao Yu, Huiming Lin, Junming Guo, Mao Peng, Maodian Liu, Yindong Tong, Yifan Lu, Xuejun Wang, Xiangliang Pan
Summary: This study investigates the impact of riverine mercury inputs on nearshore waters and the influence of anthropogenic activities on downstream seas. Through field surveys and mass balance models, the study reveals the significant role of rivers in mercury pollution and provides valuable information for water resource management to mitigate methylmercury risks.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Peijia Ku, Martin Tsz-Ki Tsui, Songnian Liu, Kimber B. Corson, Ashley S. Williams, Matthew R. Monteverde, Glenn E. Woerndle, Anne E. Hershey, Parke A. Rublee
Summary: The study found that the impact of the 2014 Dan River coal ash spill on Hg contamination in the river was limited, with Hg pollution in surface sediments and biota largely absent in the first three years after the incident. This suggests that the Hg associated with the coal ash may not be readily available for extensive microbial methylation, providing insights for remediation strategies for similar incidents.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Engineering, Environmental
Kasia J. Staniszewska, Alberto V. Reyes, Colin A. Cooke
Summary: Mercury concentrations and yields in the Yukon River are the highest among the world's six largest panarctic drainages. Permafrost thaw is considered the main driver of these high values, with glacial erosion and meltwater transport being the primary sources of mercury in suspended sediment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Polymer Science
Alessandria Maeve Ocampo, Lee Romney Santos, Sam Julian, Mark Xavier Bailon, Joel Bautista
Article
Chemistry, Multidisciplinary
Maria Janine Juachon, Justine Grace Regala, John Matthew Marquez, Mark Xavier Bailon
Article
Environmental Sciences
Mark Xavier Bailon, Min-oh Park, Yongseok Hong
CURRENT POLLUTION REPORTS
(2019)
Article
Environmental Sciences
Seam Noh, Young-hee Kim, Hyuk Kim, Kwang-seol Seok, Minho Park, Mark Xavier Bailon, Yongseok Hong
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2020)
Article
Environmental Sciences
Mark Xavier Bailon, Minoh Park, Kurt Louis Solis, Yeong Na, Dhiraj Kumar Chaudhary, Sungpyo Kim, Yongseok Hong
Summary: This study investigated the mechanisms controlling the reduction of mercury (Hg) bioavailability in activated carbon (AC) amended estuarine sediments. The results showed that AC amendment decreased Hg bioavailability not only through physicochemical sorption, but also by changing geochemical species and shifting the microbial community composition. These findings are important for managing and remediating Hg contaminated sediments.
Article
Environmental Sciences
Dhiraj Kumar Chaudhary, Mark Xavier Bailon, Hwansuk Kim Bullet, Danny Reible Bullet, Yongseok Hong
Summary: This study investigated the effectiveness of in situ sediment capping as a remediation option for mercury-contaminated sediments in the Hyeongsan River estuary, South Korea. The results showed that using activated carbon and zeolite as sorbents, as well as sand as a passive cap, can potentially reduce the concentrations of total mercury and methylmercury in sediments.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Engineering, Environmental
Mark Xavier Bailon, Dhiraj Kumar Chaudhary, Cheolho Jeon, Yong Sik Ok, Yongseok Hong
Summary: This study investigates the impact of sulfur loading on biochar's sorption capacities for methyl mercury and its efficacy as an amendment material for mercury-contaminated sediments. The results suggest that a sulfur loading of 1% is the most effective, and higher sulfur loading decreases the control effectiveness for methyl mercury. Increasing sulfur functionalization during impregnation shifts the sorption process of methyl mercury from Hg-O to Hg-S. The study also highlights the significant reduction in methyl mercury levels and changes in microbial community structure in biochar-amended sediments.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Mark Xavier Bailon, Minoh Park, Young-Gyun Choi, Danny Reible, Yongseok Hong
MEMBRANE AND WATER TREATMENT
(2020)