Hydro-geochemical control of high arsenic and fluoride groundwater in arid and semi-arid areas: A case study of Tumochuan Plain, China

Dong, Shaogang; Liu, Baiwei; Chen, Yue; Ma, Mingyan; Liu, Xiaobo; Wang, Chao

doi:10.1016/j.chemosphere.2022.134657

Cited by 23 publications

(2 citation statements)

References 55 publications

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“…Anthropogenic sources are derived mainly from the use of fertilizers and pesticides, and excess uoride emissions from coal burning and mining activities (Huang et al 2022). In addition, an alkaline environment with low Ca 2+ content and high contents of Na + and HCO 3 − is conducive to increasing the F − content in shallow groundwater (Chen et al 2020, Dong et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution, formation mechanism, and health risk assessment of high-fluoride groundwater at the largest antimony mine in Hunan Province, China

Wang¹,

Hao²,

He³

et al. 2023

Preprint

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To date, few systematic studies of the spatial distribution, formation mechanism, and health risks of high-fluoride (F−) shallow groundwater in humid and semi-humid areas of the Xikuangshan antimony mine, Hunan Province, China. In this study, during March and April 2022, a total of 39 shallow groundwater samples were collected and analyzed using factor analysis, principal component analysis, and health risk assessment. F− concentrations in the shallow groundwater were found to range from 0.08 to 15.00 mg/L (mean: 1.21 mg/L), with 25.64% of the samples having F− concentrations higher than in the Chinese national standard for drinking water (1.00 mg/L). Principal component analysis revealed that the main source of F− in the shallow groundwater samples is cation exchange, accounting for 73.40%, followed by the dissolution and precipitation of F-bearing minerals (15.10%), and human influence (11.50%). Among different age groups, children had the highest percentage of individuals (36.38%) with an F− intake above the health risk quotient safety limit, followed by adult males (23.12%), teenagers (22.21%), and infants (21.22%). The findings of this study will contribute to devising strategies for the provision of safe drinking water and management of the geological environment.

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Section: Introductionmentioning

confidence: 99%

Spatial distribution, formation mechanism, and health risk assessment of high-fluoride groundwater at the largest antimony mine in Hunan Province, China

Wang¹,

Hao²,

He³

et al. 2023

Preprint

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“…Groundwater contamination due to arsenic and fluorine is prevalent worldwide and exhibits geographic variations [1]. Arid and semi-arid regions encounter single-element contamination and compound contamination of these elements, especially in closed-flow and inland river areas with high groundwater mineralization [2].…”

Section: Introductionmentioning

confidence: 99%

Heterostructured MnO<sub>2</sub>@LDO Nanowires for Efficient Arsenic and Fluoride Co-adsorption

Wang,

Zhu,

Liu

et al. 2023

Preprint

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High levels of groundwater containing both arsenic and fluorine are prevalent, resulting in serious health problems when consumed as drinking water. This co-pollution phenomenon is widespread and requires urgent attention. The multiple forms of arsenic and arsenic-fluorine co-contamination pose a significant challenge to efficiently co-remove both substances. This research utilized a green and stable synthesis approach to create MgLaFe LDO heterostructures, which were anchored on α-MnO2 nanowires. The materials comprise magnesium and lanthanum elements with a powerful attraction towards fluoride ions, elemental iron, which can establish stable compounds with arsenate, and MnO2, which can effectively oxidize arsenous acid, thereby enabling efficient co-removal of arsenic and fluorine. The efficient oxidation process of the MnO2 nanowire and the prompt ion adsorption process of the LDO work together synergistically. The adsorption performance was assessed through isotherm and kinetic fitting. Chemisorption was found to be the process for As(Ⅲ), As(V), and F- adsorption, with As(Ⅲ) going through monolayer adsorption on the surface of MnO2 nanowires, while As(V) and F- were mainly adsorbed by multilayer process on LDO. The maximum adsorption capacities were 111.76 mg/g, 230.51 mg/g, and 765.10 mg/g for As(Ⅲ), As(V), and F-, respectively. The XPS analysis provided further elucidation on the adsorption mechanism of the MnO2@LDO heterostructure, detailing each component's role in the process. The results confirm the successful construction of the heterostructure and its efficient coupling of oxidation and adsorption.

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Effect of highway greenbelt constrution on groundwater flow in a semi-arid region

Xia,

Dong,

et al. 2024

Environ Geochem Health

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Hydro-geochemical control of high arsenic and fluoride groundwater in arid and semi-arid areas: A case study of Tumochuan Plain, China

Cited by 23 publications

References 55 publications

Spatial distribution, formation mechanism, and health risk assessment of high-fluoride groundwater at the largest antimony mine in Hunan Province, China

Spatial distribution, formation mechanism, and health risk assessment of high-fluoride groundwater at the largest antimony mine in Hunan Province, China

Heterostructured MnO<sub>2</sub>@LDO Nanowires for Efficient Arsenic and Fluoride Co-adsorption

Effect of highway greenbelt constrution on groundwater flow in a semi-arid region

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