Mercury (Hg) emissions from landfill cover soils are an important source of atmospheric Hg affecting local and regional atmospheric Hg budget. To date, soil Hg emissions have been extensively studied, whereas the photoreduction rate of cover soil Hg(II) under various conditions is rarely studied. Herein, two experimental control systems were built to investigate the effect of varying soil Hg(II) concentrations, moistures, and temperature on soil Hg emission in order to obtain the photoreduction rate of soil Hg(II) under varying environmental conditions. The results showed that high soil Hg(II) concentration and high soil temperature can facilitate Hg emission; however, high moisture inhibited Hg emission. In addition, solar radiation is an extremely critical factor for Hg emission and solar radiation-driven photoreduction is an important contribution process for Hg emission; moreover, soil Hg emission is controlled by multiple environmental factors and varies with environmental factors. Through the data fitting and formula calculation, the photoreduction rates under varying conditions are in the range of 1.49-8.54 × 10 m s W, which can be helpful for the construction of a process-based model of soil Hg emission and Hg management in landfills.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.wasman.2025.02.041 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Feasibility of using silica (NaSiO and SiONPs) to mitigate mercury in transgenic soybeans grown in contaminated soils and respective effects on nutrient homeostasis.
Environ Sci Pollut Res Int
March 2025
Spectrometry, Sample Preparation and Mechanization Group, Institute of Chemistry, Universidade Estadual de Campinas - UNICAMP, P.O. Box 6154, Campinas, SP, 13083-970, Brazil.
This study aimed to investigate the potential of Silicon (SiONPs and NaSiO) to mitigate Hg absorption, accumulation, and toxicity in transgenic soybean plants. By analyzing Hg speciation, total Hg content, physiological characteristics, anatomical structures, and the homeostasis of macro (P, S, Ca, K, and Mg) and micro (Cu, Fe, Mn, Zn) nutrients, the impact of Si against Hg-induced stress was assessed. Plants were cultivated under six treatments: water, SiONPs, NaSiO, NaSiO + HgCl, SiONPs + HgCl, and HgCl.
View Article and Find Full Text PDFAn attempt to study the photoreduction rate of divalent mercury in landfill cover soils using experimental control systems.
Waste Manag
March 2025
School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China. Electronic address:
Mercury (Hg) emissions from landfill cover soils are an important source of atmospheric Hg affecting local and regional atmospheric Hg budget. To date, soil Hg emissions have been extensively studied, whereas the photoreduction rate of cover soil Hg(II) under various conditions is rarely studied. Herein, two experimental control systems were built to investigate the effect of varying soil Hg(II) concentrations, moistures, and temperature on soil Hg emission in order to obtain the photoreduction rate of soil Hg(II) under varying environmental conditions.
View Article and Find Full Text PDFNew insights into aqueous Hg(II) photoreduction from paddy field system to natural water: Gear effect of straw returning and soil tillage.
J Hazard Mater
January 2025
Key Laboratory of Karst Georesources and Environment (Guizhou University), Ministry of Education, College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China.
Article Synopsis
- Soil dissolved organic matter (SDOM) affects how divalent mercury (Hg(II)) behaves and its photoreduction in paddy fields, but the impact of straw returning and soil tillage on SDOM composition is not well understood.
- Long-term straw returning and tillage increase SDOM aromatization and oxygen-containing functional groups, which influence Hg(II) photoreduction rates under varying conditions of mercury concentration.
- Enhancements in Hg(II) photoreduction (up to about 44.76%) due to these practices suggest that previous estimates of mercury emissions from paddy fields may be inaccurate, highlighting the need for further research on their role in the global mercury cycle.
Development of polyfunctionalized biochar modified with manganese oxide and sulfur for immobilizing Hg(II) and Pb(II) in water and soil and improving soil health.
Sci Total Environ
December 2024
China Nonferrous Metal industry Xi 'an Survey and Design Institute Co., Ltd., Xian, Shaanxi Province 710054, China.
Mercury (Hg) and lead (Pb) pose significant risks to human health due to their high toxicity and bioaccumulative properties. This study aimed to develop a novel biochar composite (HMB-S), polyfunctionalized with manganese dioxide (α-MnO) and sulfur functional groups, for the effective immobilization of Hg(II) and Pb(II) from contaminated environments. HMB-S demonstrated superior adsorption capacities of 190.
View Article and Find Full Text PDFA novel reaction-based fluorescent probe with a nanomolar sensitivity for detection of Hg(II) and its multiple application.
Spectrochim Acta A Mol Biomol Spectrosc
February 2025
School of Materials ＆ Chemical Engineering, Zhongyuan University of Technology, Zhengzhou 450007, PR China.
An easily synthesized reaction-based probe for the fluorescence detection of Hg ions using was reported. The designed probe exhibited "turn-on" fluorescence response towards Hg ions via deprotection of the thiocarbonate-protecting group to alcohol in the HEPES/EtOH=8:2 (v/v, 5 mM, pH 7.4).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!