Article
Environmental Sciences
Chunjie Wang, Zhangwei Wang, Xiaoshan Zhang, Yu Gao, Huan Zhang, Xuan Liu, Yi Zhang
Summary: During the 2022 Beijing Olympic Winter Games, atmospheric mercury levels in Beijing were monitored. The main sources were found to be central/southeastern Hebei, Tianjin, and southern Beijing. The risk from particulate bound mercury was higher than gaseous elemental mercury, and children were more sensitive to mercury exposure.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Benedetto Schiavo, Ofelia Morton-Bermea, Elias Salgado-Martinez, Rocio Garcia-Martinez, Elizabeth Hernandez-Alvarez
Summary: This study investigated atmospheric mercury concentrations in Mexico City and compared them with other pollutants. The results showed that the GEM concentrations in Mexico City were similar or slightly elevated compared to global levels, but significantly lower than in contaminated areas. Atmospheric mercury emissions were mainly influenced by sunlight radiation and meteorological conditions, and were primarily from urban combustion and industrial plants. Residents in Mexico City were not at significant noncarcinogenic health risk from exposure to these mercury pollutants.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Environmental Sciences
Zhili Feng, Tingting Xiao, Qing Xu, Gang Zhang, Deli Wang
Summary: This study investigated the GEM exchange fluxes over soil covered by two vegetation communities and found that plant coverage and meteorological conditions significantly affected GEM exchange. The results demonstrated that grassland served as a source for atmospheric mercury during the growing season and the plant community played an important role in mercury exchange between soil and atmosphere.
Article
Environmental Sciences
Viktor V. Kalinchuk, Evgeny A. Lopatnikov, Anatoliy S. Astakhov, Maxim Ivanov, Limin Hu
Summary: The Eastern Arctic Seas and north-western Pacific are poorly investigated in terms of mercury cycling in marine systems. Atmospheric Hg(0) concentrations varied in different regions, and sea-air Hg(0) evasion fluxes were found to be significantly influenced by river runoff and environmental factors.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Hoin Lee, Sae Yun Kwon, Jonghun Kam, Kitack Lee, Xuewu Fu, In-Gyu Cho, Sung-Deuk Choi
Summary: Understanding sources and processes affecting atmospheric mercury (Hg) is essential for targeted Hg management. This study used stable isotopes and air trajectories to characterize sources and processes of total gaseous Hg (TGM) and particulate bound Hg (PBM) in a coastal city in South Korea. The results showed that TGM evasion from the coastal surface of the East Sea and high latitude regions are important sources, while PBM is mainly sourced from local anthropogenic emissions and undergoes Hg2+ photo-reduction on particles. The study also identified a regional isotopic end-member that can be used to quantify the relative influence of local anthropogenic Hg emissions and complex processes affecting PBM in East Asia and other coastal regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Analytical
Miao Shi, Bridget A. Bergquist, Anwen Zhou, Yaqiu Zhao, Ruoyu Sun, Jiubin Chen, Wang Zheng
Summary: The efficiency of cold vapor generation (CVG) method for sample introduction in mercury (Hg) isotope analysis and its impact on Hg isotope analysis have been investigated in this study. The efficiency of Hg CVG can be affected by the sample uptake rate, sample matrix, and the design of the gas-liquid separator (GLS). Matrix separation, optimal GLS design, and tuning the sample uptake rate are crucial for obtaining high accuracy and precision in Hg isotope analysis.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Environmental Sciences
Mae Sexauer Gustin, Sarrah M. Dunham-Cheatham, Natalie Allen, Nicole Choma, William Johnson, Sam Lopez, Armistead Russell, Eric Mei, Olivier Magand, Aurelien Dommergue, Tyler Elgiar
Summary: The Hg research community needs more accurate methods for measuring atmospheric Hg concentrations and chemistry. The Reactive Mercury Active System (RMAS) was used to determine RM, gaseous oxidized mercury, and PBM concentrations and chemistry. The study found that particulate-bound Hg was dominant in Atlanta, N and S Hg-II compounds were primarily present in Great Salt Lake, halogenated compounds were lowest when air was derived from the Midwest in Guadalupe Mountains National Park, and halogenated compounds were primarily present with some N, S, and organic Hg-II compounds potentially associated with biological activity in Amsterdam Island, Southern Indian Ocean. The GEOS-Chem model was used to predict measurements at five field sites, and the results showed some differences between the model values and observations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
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
Environmental Sciences
Lei Zhang, Peisheng Zhou, Hui Zhong, Yu Zhao, Liang Dai, Qin'geng Wang, Mengxiao Xi, Yi Lu, Yutong Wang
Summary: Long-term observation and statistical models were used to study the impacts of anthropogenic and natural perturbations on atmospheric mercury concentration in eastern China. The results showed significant effects of meteorological factors and anthropogenic emissions on GEM concentrations. With decreasing anthropogenic emissions, the influence of meteorological factors on GEM becomes more prominent.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Chunjie Wang, Fan Hui, Yu Gao, Zhangwei Wang, Xiaoshan Zhang
Summary: This study investigated atmospheric mercury species at a suburban site near Shijiazhuang, China, and found that the concentrations of gaseous elemental mercury and fine particulate bound mercury exhibited pronounced seasonal and diurnal patterns. The mercury pollution in the area was mainly influenced by regional sources, with different forms of mercury being impacted by different sources.
ATMOSPHERIC POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Can Li, Vishnu Sriram, Joo-Youp Lee
Summary: In this study, the impact of HCl and NH3 on Hg(0) oxidation catalytic reaction was investigated through real-time Hg(0) oxidation experiment and X-ray Absorption Near-Edge Structure analysis. The research revealed that Hg(0) oxidation is influenced by the combined action of HCl and O-2. HgCl2 was identified as the major mercury species formed on the spent catalyst under typical flue gas conditions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Xiangwen Xing, Xiaoyang Zhang, Jiyun Tang, Lin Cui, Yong Dong
Summary: Fe2O3/TiO2 sorbents synthesized by the sol-gel method exhibited excellent mercury capture efficiency in simulated syngas, with sensitivity to H2S and reusability.
Article
Engineering, Environmental
Guor-Cheng Fang, Chao-Lang Kao, Yuan-Jie Zhuang, Pin-Wen Huang
Summary: The ambient air TSP concentrations, dry deposition fluxes, and particulate-bound mercury concentrations were measured and analyzed at a complex site. The model used to predict the dry deposition fluxes underestimated the values for all particle sizes. Better results were observed for pollutants' dry deposition fluxes as particle size increased.
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Joo Chan Lee, Se-Won Park, Hyun Sub Kim, Tanvir Alam, Sang Yeop Lee
Summary: The study assessed the oxidation characteristics of elemental mercury based on the input gas environment, temperature, and particle size distribution of the steel slag. Experimental results showed that oxidation of elemental mercury rarely occurred in air environment, but a stronger oxidation reaction was observed in the HCl gas environment, especially with smaller particles of steel slag. The oxidation reactivity was significantly higher at temperatures between 100℃ and 200℃ compared to room temperature. Further research is needed to determine the precise temperature range for the oxidation reaction.
Article
Environmental Sciences
Xuewu Fu, Chen Liu, Hui Zhang, Yue Xu, Jun Li, Xiaopu Lyu, Gan Zhang, Hai Guo, Xun Wang, Leiming Zhang, Xinbin Feng
Summary: The study found that the seasonal variations in TGM isotopic compositions and concentrations in 10 Chinese cities were likely controlled by land surface emissions with highly negative delta Hg-202 signatures, rather than atmospheric oxidation chemistry, vegetation activity, or residential coal combustion. The amplitudes of seasonal variations in TGM concentrations and Delta Hg-199 were significantly correlated with the simulated soil GEM emission flux.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
