Article
Engineering, Environmental
Mui-Choo Jong, Xuneng Tong, Junnan Li, Zichen Xu, Shannae Hui Qing Chng, Yiliang He, Karina Yew-Hoong Gin
Summary: Microplastics < 5 mm are impacting oceanic health and coastal development globally. This study in Southeast Asia reveals the influence of tropical climate and monsoons on the distribution of MP, with significant variations by season and location. Mangroves may serve as important reservoirs for MP, which consist of various morphologies and polymers such as polypropylene and polyethylene.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Geosciences, Multidisciplinary
Zeng Xu, Long Chen, Yanxu Zhang, Guoling Han, Qing Chen, Zhaohan Chu, Yanping Zhang, Chao Li, Yi Yang, Xuejun Wang
Summary: This study found that meteorological conditions are important drivers of mercury seasonality in temperate regions. Surface air temperature, solar radiation, surface wind, monsoon wind, and precipitation significantly affect the seasonal variations of mercury. The findings also predicted further changes in mercury seasonality under future global warming.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Satoshi Irei
Summary: This study investigated the transformation of gaseous elemental mercury (GEM) into oxidized mercury in bulk liquid solutions. It found that sulfuric acid significantly enhanced the concentration of oxidized mercury, while pure water and seawater showed relatively stable dissolved mercury levels. The slow oxidation reaction by sulfuric acid led to higher concentrations of oxidized mercury compared to equilibrated elemental mercury concentrations.
APPLIED SCIENCES-BASEL
(2021)
Article
Meteorology & Atmospheric Sciences
Mohammad Rubaiat Islam, Jing Gao, Nasir Ahmed, Mohammad Masud Karim, Abdul Quaiyum Bhuiyan, Ariful Ahsan, Shamsuddin Ahmed
Summary: The study evaluated the influence of the Indian summer monsoon (ISM) on infra-seasonal variations of stable isotopes in precipitation in Bangladesh by analyzing data from three stations. Findings showed distinct variations of precipitation stable isotopes from west to east Bangladesh, which were influenced by convections over the Bay of Bengal and tropical Indian Ocean.
ATMOSPHERIC RESEARCH
(2021)
Article
Ecology
Xin Wang, Ting Liu, Liang Wang, Zongguang Liu, Erxiong Zhu, Simin Wang, Yue Cai, Shanshan Zhu, Xiaojuan Feng
Summary: This study provides a detailed investigation on riverine carbon transport in alpine headwater streams, highlighting the significant impact of seasonal factors and hydrological events on carbon transport. The results emphasize the unique patterns of carbon transport in alpine headwater catchments and their strong links with local hydrological events.
Article
Engineering, Civil
Shiqi Liu, Ping Wang, Qiwei Huang, Jingjie Yu, Sergey P. Pozdniakov, Ekaterina S. Kazak
Summary: This study analyzed the concentration, ages, and seasonality of riverine dissolved organic carbon (DOC) in the estuaries of six major Arctic rivers. It found that DOC concentration increased with streamflow, decreased during the freezing period, and increased during the flood pulse period. In river basins with large continuous permafrost areas, the release of older DOC into rivers was restricted. However, riverine DOC exports likely respond positively to changes in water temperature during the ice-free period, especially in basins with more sporadic permafrost, thicker active layers, more precipitation, and less soil organic carbon.
JOURNAL OF HYDROLOGY
(2022)
Article
Environmental Sciences
Yong Q. Tian, Qian Yu, Hunter J. Carrick, Brian L. Becker, Remegio Confesor, Mark Francek, Olivia C. Anderson
Summary: This study used field samples, hydrological modeling, and reclassification analysis of land use data to investigate the spatial and temporal variations of dissolved organic carbon (DOC) concentrations in cropland streamflow. The results showed that baseflow DOC concentrations from croplands were significantly higher than those from other landcover areas, especially during spring runoff/snowmelt scenarios. Key factors regulating the spatiotemporal DOC concentrations in cropland streamflow were identified, contributing to the improvement of analytical models linking watershed characteristics to carbon cycling processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Ruoyang Zhang, Jing Qiao, Dekun Huang, Xihuang Lin, Li Tian, Baiyun Wang, Hongyan Bao, Shuh-Ji Kao
Summary: Aerosols are an important source of dissolved black carbon (DBC) in the ocean, and the impact of anthropogenic activities on the seasonal variations of aerosol DBC concentration and condensation degree remains unclear. In this study, we collected 33 aerosol samples from a coastal site in China and analyzed the concentrations of DBC, water-soluble organic carbon (WSOC), and elemental carbon (EC). Our results showed that DBC concentrations were higher in spring and winter, influenced by sources, rainfall frequency, and secondary processes. The dominant source of DBC was fossil fuel (FF) burning, with enhanced contribution from biomass burning brought by East Asian Monsoon.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Ecology
Benjamin Andrieux, Juliette Signor, Vincent Guillou, Michael Danger, Franck Jabot
Summary: The study aimed to document global variations in body stoichiometry of heterotrophs and assess the drivers of this variation, focusing on carbon, nitrogen, and phosphorus. The research compiled a global database from scientific literature on body elemental composition, finding that the variations were significantly influenced by taxonomic groups, habitat, diet, and body mass. The results showed significant interspecific variability, with taxonomic group being the strongest contributor to the differences observed.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2021)
Article
Green & Sustainable Science & Technology
Lijun Jiang, Jiahua Zhang, Quan Liu, Xianglei Meng, Lamei Shi, Da Zhang, Mingming Xing
Summary: This study investigates the temporal and spatial variations of global CompoundHW and assesses the factors influencing its distribution. Results show increasing trends in the days, frequency, cumulative heat, and occurrence proportion of global average CompoundHW. This work is important for regional development of adaptation and mitigation methods.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Oceanography
Tanakorn Ubonyaem, Sujaree Bureekul, Chawalit Charoenpong, Penjai Sompongchaiyakul
Summary: This study investigated the presence of mercury in water and surface sediment at the mouths of four rivers in Thailand. The results showed that mercury concentrations in both water and sediment increased during the post-wet season period, indicating intensified transportation of mercury from sources to river mouths.
CONTINENTAL SHELF RESEARCH
(2023)
Article
Environmental Sciences
Chiquan He, Rui Qi, Haiyue Feng, Zhenzhen Zhao, Fushun Wang, Daoyuan Wang, Feifei Wang, Xueping Chen, Pu Zhang, Siliang Li, Yuanbi Yi
Summary: Human activities have made rivers and reservoirs a source of nitrous oxide (N2O), which plays a crucial role in global climate change. This study investigated the production of N2O in deep-water and shallow-water reservoirs by monitoring water environmental factors and N2O concentrations in cascade reservoirs of the Zhujiang River. The findings showed significant variations in N2O concentrations among different reservoirs and different mechanisms of N2O production.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Soil Science
Enze Xie, Yanxia Zhang, Biao Huang, Yongcun Zhao, Xuezheng Shi, Wenyou Hu, Mingkai Qu
Summary: This study examined the spatiotemporal distribution of soil organic carbon (SOC) in three typical regions in southeastern China from 1981 to 2011. The results showed that topography, soil sand content, and carbon inputs were the main drivers of SOC variability in different regions. Significant increases in SOC storage were observed in some areas, while others experienced rapid decreases due to land use changes and carbon inputs.
SOIL & TILLAGE RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Fei Guo, Steven C. Clemens, Ting Wang, Yang Wang, Yuming Liu, Feng Wu, Xingxing Liu, Zhangdong Jin, Youbin Sun
Summary: High-resolution elemental proxies of Chinese eolian deposits show potential for evaluating co-evolution of orbital- and millennial-scale monsoon variations, with certain elemental ratios being reliable indicators for chemical weathering and grain-size sorting. The study suggests that precessional- to millennial-scale monsoon changes are persistent and consistent with other elemental records in the region.
Article
Multidisciplinary Sciences
Md. Moniruzzaman Monir, Md. Rokonuzzaman, Subaran Chandra Sarker, Edris Alam, Md. Kamrul Islam, Abu Reza Md. Towfiqul Islam
Summary: This research aims to analyze spatiotemporal variations in rainfall in Bangladesh and predict future rainfall trends. The results show that rainfall is declining in most parts of Bangladesh, especially during the pre-monsoon and post-monsoon periods. The predictions suggest that there will be less rainfall in the coming years.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Environmental
Tongxu Liu, Xiaobo Luo, Yundang Wu, John R. Reinfelder, Xiu Yuan, Xiaomin Li, Dandan Chen, Fangbai Li
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Environmental Sciences
Yunling Zhang, Kun Gao, Zhi Dang, Weilin Huang, John R. Reinfelder, Yuan Ren
Summary: The study found that under anaerobic conditions, microbial sulfidogenesis by D. meridiei can trigger significant arsenic mobilization in the early stage and remove arsenic from aqueous solutions when new minerals are formed at a later stage.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Analytical
Shin-Jing Ang, Yi-Sheng Chen, Chun-Mao Tseng
Summary: An online flow injection mercury analyser (AMA) is introduced for the analysis of inorganic mercury in environmental waters. The analyser combines different techniques to achieve improved analytical throughput and accuracy. System optimisation and reliability tests demonstrate the excellent performance of the instrument.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Han Ye, Kun Gao, Guining Lu, Yingying Xie, John R. Reinfelder, Weilin Huang, Xueqin Tao, Xiaoyun Yi, Zhi Dang
Summary: In this study, the addition of stannous chloride improved the recovery of copper sulfide and allowed for the separate extraction of sulfur from copper sulfide and pyrite. This method can provide accurate separation of metal sulfides for environmental research purposes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Yuwei Wang, Gideon Bartov, Thomas Wang, John R. Reinfelder, Thomas M. Johnson, Nathan Yee
Summary: Experimental results showed that Hg stable isotope fractionation can be facilitated by rapid Hg isotopic exchange in Hg(II)-Hg(0) redox systems, and the fractionation is influenced by nuclear volume effects.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Engineering, Environmental
Qiang Huang, Xiaoshuai He, Weilin Huang, John R. Reinfelder
Summary: Soot and mercury are both significant air pollutants, and this study found that the presence of soot during the photoreduction of Hg(II) can lead to Hg isotope fractionation. The different conditions result in varying reactions, with mass-independent Hg isotope fractionation observed under different conditions. This research sheds light on the transformational histories of aerosol-bound Hg(II) in the environment.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Huiqiong Chen, Xiaoyu Liang, Xiaomei Gong, John R. Reinfelder, Huamei Chen, Chongjun Sun, Xiulian Liu, Shuchang Zhang, Fangbai Li, Chuanping Liu, Junliang Zhao, Jicai Yi
Summary: Silicon treatment significantly alleviates the toxicity of Cd and As in rice by reducing their translocation and reactive oxygen species production. Transcriptomics analysis revealed that Si reshapes the gene expression patterns in Cd- or As-stressed rice roots, suggesting it may play a fundamental role in plant defense against heavy metalloid stresses by modulating whole genome expression. Identification of novel candidate genes like 0s01g0524500 and 0s06g0514800 provides valuable resources for developing Cd- and/or As-resistant plants.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Xiaofei Li, Chuling Guo, Xiaohu Jin, Qian Yao, Qianqian Liu, Lijuan Zhang, Guining Lu, John R. Reinfelder, Weilin Huang, Zhi Dang
Summary: In this study, the adsorption mechanism of Cr(VI) onto lepidocrocite facets was investigated using various experimental techniques and theoretical calculations. The results showed that rod-like lepidocrocite with a higher proportion of {001}/{010} exhibited higher Cr(VI) adsorption capacity and site density compared to plate-like lepidocrocite. The study also revealed the different surface structures of Cr(VI) on the {001} and {010} facets, which were both thermodynamically stable.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Engineering, Environmental
Xiaoshuai He, William G. Wallace, John R. Reinfelder
Summary: Grass shrimp have been identified as a potential factor in the transfer of methylmercury from salt marsh sediments to young-of-the-year (YOY) fish. The concentrations of methylmercury in grass shrimp were found to be significantly correlated with sediment levels. Bioenergetic models have shown that grass shrimp play a major role in the accumulation of methylmercury in YOY striped bass and summer flounder. Direct accumulation of methylmercury from grass shrimp to YOY fish increases with higher levels of methylmercury in both grass shrimp and sediment. However, in heavily contaminated salt marshes, indirect accumulation of methylmercury from grass shrimp by YOY summer flounder is predicted to plateau due to a lower proportion of grass shrimp in the diet.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Environmental Sciences
Zhihong Tu, Qi Wu, Hongping He, Shu Zhou, Jie Liu, Huijun He, Chongmin Liu, Zhi Dang, John R. Reinfelder
Summary: Acid mine drainage (AMD) is a significant source of environmental pollution globally, and the conventional methods for its remedial treatment are costly and may lead to secondary pollution. This review highlights the importance of pyrite surface passivation as a potential solution to prevent or reduce AMD generation and associated pollution. Various pyrite anti-corrosion technologies, including inorganic, organic, and organosilane passivating coatings, are summarized. The need for future research to integrate existing passivation agents or new artificial materials while considering environmental conditions, costs, and long-term passivation performance is emphasized.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Yundang Wu, Xiao Zhu, Xinxin Wang, Zhixin Lin, John R. Reinfelder, Fangbai Li, Tongxu Liu
Summary: A new electron shuttling pathway was discovered in Shewanella oneidensis MR-1 using the lipophilic electron mediator resazurin. This pathway is independent of the Mtr pathway and relies on the involvement of FccA, CctA, and CymA. The findings provide new insights into the role of exogenous electron mediators in electron shuttling in natural and engineered biogeochemical systems.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Limnology
Xiaoshuai He, Yi-Sheng Chen, Shin-Jing Ang, Jen-Chieh Shiao, Chun-Mao Tseng, John R. Reinfelder
Summary: The sources of methylmercury (MeHg) in Pacific bluefin tuna (PBT) from the western North Pacific Ocean (WPO) were investigated using mercury stable isotopes. The study found that the source of MeHg accumulated by PBT changes as they age, with larger PBT accumulating more MeHg from epipelagic prey in the Kuroshio extension. In addition, the sources of MeHg in the WPO food web appear to be different from those in the central and eastern North Pacific.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2023)
Article
Multidisciplinary Sciences
Chun-Mao Tseng, Shin-Jing Ang, Yi-Sheng Chen, Jen-Chieh Shiao, Carl H. Lamborg, Xiaoshuai He, John R. Reinfelder
Summary: Research shows that the mercury accumulation rate in bluefin tuna is highest in the Mediterranean Sea, decreases in the North Pacific, Indian Ocean, and North Atlantic Ocean, correlating with the concentrations of MeHg in regional seawater and zooplankton. These differences are related to the levels of mercury in each ocean subbasin, geogenic enrichment, and anthropogenic contamination.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
