Temporal variation of groundwater level and arsenic concentration at Jianghan Plain, central China

Duan, Yonggang; Gan, Yiqun; Wang, Yanxin; Deng, Yamin; Guo, Xinxin; Dong, Chuangju

doi:10.1016/j.gexplo.2014.12.001

Cited by 121 publications

(64 citation statements)

References 46 publications

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“…Besides, under relatively oxidizing conditions, As could be re-adsorbed onto the Fe oxyhydroxides due to their high affinity for As species (Roberts et al, 2004). Similar to the study area, many arsenic contaminated areas, such as Hetao Plain (Deng et al, 2009) and Jianghan Plain (Duan et al, 2015), experience frequent agricultural practice, which cause the depth variation of groundwater As concentration.…”

Section: Impact Of Groundwater Salinization On Arsenic Iodine and Flmentioning

confidence: 82%

Cl/Br ratios and chlorine isotope evidences for groundwater salinization and its impact on groundwater arsenic, fluoride and iodine enrichment in the Datong basin, China

Wang

Xie

2016

Science of The Total Environment

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Section: Impact Of Groundwater Salinization On Arsenic Iodine and Flmentioning

confidence: 82%

Cl/Br ratios and chlorine isotope evidences for groundwater salinization and its impact on groundwater arsenic, fluoride and iodine enrichment in the Datong basin, China

Wang

Xie

2016

Science of The Total Environment

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“…Arsenic concentration is high in sediments at the study site, ranging from 11 to 108 mg/kg with an average of 12.7 mg/kg (Duan et al, ; Schaefer et al, ). The highest arsenic concentration in the sediments was found in the confined aquifer at 20 m depth in well S03 (Li et al, ).…”

Section: Research Sitementioning

confidence: 96%

“…Jianghan Plain is an alluvial plain surrounded by Han River at the north and Yangtze River at the south, covering an area of >55,000 km 2 (Schaefer et al, ). The area is subtropical with an annual precipitation of 1,300 mm, of which 50% occurs in the rainy season (May to August; Duan et al, ). A field site located in the southeast of Jianghan Plain between Dongjing and Tongshun Rivers was selected for this study because of the well‐established groundwater monitoring network that can be used for developing a site‐wide model and for comparing model results with observations at monitoring wells (Figure ).…”

Section: Research Sitementioning

confidence: 99%

“…The groundwater level at the site is affected not only by surface water level but also by human activities. Groundwater was pumped for irrigation and domestic water usage, causing short‐term, frequent variations in groundwater levels between May and August (Duan et al, ). This would enhance the downward hydraulic gradient between the confined aquifer and upper aquitard, potentially inducing leaking recharge of surface water through the upper aquitard (Schaefer et al, ).…”

Section: Research Sitementioning

confidence: 99%

“…In this study, we used a reactive transport model to identify important hydro‐biogeochemical processes that control arsenic distribution and seasonal variation in a groundwater‐surface water exchange zone at Jianghan plain, Hubei province, China, where groundwater arsenic contamination is a major environmental problem, affecting the health of over 73,000 local people (Duan et al, ; Gan et al, ). The groundwater arsenic concentrations at Jianghan plain varied significantly with time, decreasing from October to April/May, then sharply rebounded from May to July, and maintained a high level from August to September (Duan et al, ). Seasonal variability in As concentrations was also reported at other sites (Frost et al, ; Guo et al, ; Majumder et al, ; Masson et al, ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Identification of Hydrobiogeochemical Processes Controlling Seasonal Variations in Arsenic Concentrations Within a Riverbank Aquifer at Jianghan Plain, China

Huang

Liu

Yang

et al. 2018

Water Resources Research

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The arsenic concentration in groundwater varies significantly with time and space in groundwater‐surface water exchange zones. Various processes have been identified that control arsenic concentration distribution and mobility in laboratory systems. However, it is still challenging to identify important processes controlling arsenic concentration distribution at the field scale due to the complex coupling of hydrobiogeochemical processes. In this study, a reactive flow and transport model was used to identify dominant processes controlling arsenic distribution and seasonal variations in groundwater‐surface water exchange zones using Jianghan Plain, China, as an example. The results revealed the importance of river water and groundwater interactions on seasonal changes in arsenic concentration; however, the affected region is limited to within 50‐m distance to the river. The modeling results, unexpectedly, revealed the predominant importance of groundwater extraction to the seasonal variation in arsenic concentration. The groundwater extraction changed the groundwater flow pattern and induced vertical leakage of oxygen‐containing surface water into the aquifer, which triggered a series of biogeochemical reactions that changed groundwater redox conditions and promoted arsenic sorption, resulting in a rapid decrease in arsenic concentrations in groundwater. After groundwater extraction ceased, aquifer recovered to anoxic condition, promoting arsenic release from the sorbed phase, leading to a rapid rebounding in groundwater arsenic concentrations. Overall, this study provided a tool to identify coupled hydrobiogeochemical processes on arsenic spatiotemporal distribution and migration in groundwater.

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Changes in water vapor adsorption and water film thickness in clayey materials as a function of relative humidity

Lin

Chen

et al. 2020

Vadose Zone Journal

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Soil water, with adsorbed water being an important component, plays an important role in fluid flow and chemical movement in the unsaturated zone. The adsorbed water consists of water film and interlayer water, and its content is related to the relative humidity (RH). This study theoretically and experimentally focuses on the variation in adsorbed water content in clayey materials as the RH changes. Based on a slit-pore model, three types of water (water film, interlayer water, and capillary water) could be present in the water vapor adsorption process. The variation of water film is obtained from the analysis of interfacial forces, and then the total water content can be quantitatively subdivided into these three types of water for different RH values. The slit-pore adsorption model was used with experimental measurements (water vapor adsorption and N 2 physisorption) to quantify the amounts and interrelationships of these three different types of water to six clayey materials, namely three clay minerals (kaolinite, montmorillonite, and illite-smectite mixed layer) and three clay-rich sediments from the Jianghan Plain in China. The main results are that (a) the volumes of water vapor adsorption are much greater than those of N 2 adsorption except for kaolinite; (b) interlayer water largely dominates the growth of total water content in montmorillonite and results in a concentration of 0.090 ml g −1 at 95% RH; and (c) the minimum thickness of water film is calculated to be 0.23 nm, and the maximum value is one-third of the pore width by considering the interfacial forces. 1 INTRODUCTION Soil water supports plant growth, affects nutrient transport, and is involved in many geophysical and geochemical

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Temporal variation of groundwater level and arsenic concentration at Jianghan Plain, central China

Cited by 121 publications

References 46 publications

Cl/Br ratios and chlorine isotope evidences for groundwater salinization and its impact on groundwater arsenic, fluoride and iodine enrichment in the Datong basin, China

Cl/Br ratios and chlorine isotope evidences for groundwater salinization and its impact on groundwater arsenic, fluoride and iodine enrichment in the Datong basin, China

Identification of Hydrobiogeochemical Processes Controlling Seasonal Variations in Arsenic Concentrations Within a Riverbank Aquifer at Jianghan Plain, China

Changes in water vapor adsorption and water film thickness in clayey materials as a function of relative humidity

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