Environmental geochemistry of high arsenic groundwater at western Hetao plain, Inner Mongolia

He, Jun; Ma, Teng; Deng, Yamin; Yang, Hui; Wang, Yanxin

doi:10.1007/s11707-009-0004-x

Cited by 31 publications

(12 citation statements)

References 10 publications

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“…This was consistent with the results by He (2010) that As in soils or sediments could be leached into groundwater with the irrigation return flow. The 17 groundwater samples were divided into two groups with the distinctive geochemical characteristics according to the PCA ( Figure 2A ) and Hierarchical clustering results ( Figure 2B ).…”

Section: Resultssupporting

confidence: 93%

“…Agricultural activities such as N-fertilizer application and irrigation might also play important roles in As release and mobilization (Busbee et al, 2009; Mayorga et al, 2013). The reasonable explanation might be that the irrigation and drainage processes could leach As and dissolved organic matter from surficial sediments to the underlying aquifer, which caused the biogeochemical changes (He, 2010). …”

Section: Resultsmentioning

confidence: 99%

“…As one of biggest agricultural areas in China, the subsurface hydrology in Hetao Plain has been largely affected by agricultural irrigation and drainage activities. Previous studies showed that drainage and irrigation would change natural biogeochemical processes and substantially affect As release in groundwater aquifers of the Hetao Plain (He, 2010; Guo et al, 2011). However, the effects of agricultural irrigation on in situ microbial diversity and community structure in high As groundwater have yet to be fully understood.…”

Section: Introductionmentioning

confidence: 99%

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Microbial Community of High Arsenic Groundwater in Agricultural Irrigation Area of Hetao Plain, Inner Mongolia

Wang

Jiang

et al. 2016

Front. Microbiol.

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Microbial communities can play important role in arsenic release in groundwater aquifers. To investigate the microbial communities in high arsenic groundwater aquifers in agricultural irrigation area, 17 groundwater samples with different arsenic concentrations were collected along the agricultural drainage channels of Hangjinhouqi County, Inner Mongolia and examined by illumina MiSeq sequencing approach targeting the V4 region of the 16S rRNA genes. Both principal component analysis and hierarchical clustering results indicated that these samples were divided into two groups (high and low arsenic groups) according to the variation of geochemical characteristics. Arsenic concentrations showed strongly positive correlations with NH4+ and total organic carbon (TOC). Sequencing results revealed that a total of 329–2823 operational taxonomic units (OTUs) were observed at the 97% OTU level. Microbial richness and diversity of high arsenic groundwater samples along the drainage channels were lower than those of low arsenic groundwater samples but higher than those of high arsenic groundwaters from strongly reducing areas. The microbial community structure in groundwater along the drainage channels was different from those in strongly reducing arsenic-rich aquifers of Hetao Plain and other high arsenic groundwater aquifers including Bangladesh, West Bengal, and Vietnam. Acinetobacter and Pseudomonas dominated with high percentages in both high and low arsenic groundwaters. Alishewanella, Psychrobacter, Methylotenera, and Crenothrix showed relatively high abundances in high arsenic groundwater, while Rheinheimera and the unidentified OP3 were predominant populations in low arsenic groundwater. Archaeal populations displayed a low occurrence and mainly dominated by methanogens such as Methanocorpusculum and Methanospirillum. Microbial community compositions were different between high and low arsenic groundwater samples based on the results of principal coordinate analysis and co-inertia analysis. Other geochemical variables including TOC, NH4+, oxidation-reduction potential, and Fe might also affect the microbial composition.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microbial Community of High Arsenic Groundwater in Agricultural Irrigation Area of Hetao Plain, Inner Mongolia

Wang

Jiang

et al. 2016

Front. Microbiol.

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“…In China, high arsenic-bearing groundwater mainly exists in Inner Mongolia, Shanxi, Xinjiang, etc., including 40 counties of eight provinces. For example, arsenic concentration in groundwater samples collected from the Hetao Plain in the Inner Mongolia Autonomous Region, Datong in Shanxi province, and Dzungaria district in Xinjiang province can be up to 1.09 mg/L [7], 1.82 mg/L [8], and 0.85 mg/L [9], respectively. It is obvious that the highest concentration of arsenic in arsenic-bearing groundwater in different regions in China can reach, or exceed, 1 mg/L.…”

Section: Introductionmentioning

confidence: 99%

Schwertmannite Adherence to the Reactor Wall during the Bio-Synthesis Process and Deterioration of Its Structural Characteristics and Arsenic(III) Removal Efficiency

et al. 2017

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Schwertmannite, a kind of iron oxyhydrosulfate mineral, can removal arsenic(III) from arsenic(III)-bearing groundwater by the adsorption process. In this study, schwertmannite was bio-synthesized by Acidithiobacillus ferrooxidans LX5 in shaking flasks (160 rpm) containing a 0.16 mol/L FeSO 4 liquid solution. After bio-synthesis, 25.5% of the bio-synthesized schwertmannite adhered to the reactor wall (designated as adhered-sch) and the remainder was suspended in the system (designated as suspended-sch). Particles of adhered-sch exhibited a fractured structure with a small specific surface area (4.36 m 2 /g) and total pore volume (3.13 × 10 −2 cm 3 /g). In contrast, suspended-sch had a spiny structure (similar in appearance to a hedgehog), and a larger specific surface area (9.62 m 2 /g) and total pore volume (8.01 × 10 −2 cm 3 /g). When 0.25 g/L of adhered-sch was used as an adsorbent for arsenic(III) removal from 1 mg/L arsenic(III)-bearing waters (at pH 7.5), the arsenic(III) removal efficiency was 43.2% after 4 h of adsorption. However, this efficiency could be increased by 50% by using suspended-sch as the adsorbent. Furthermore, by adding 13.3 g/L and 26.7 g/L additional schwertmannite into the reactor system prior to schwertmannite bio-synthesis, all synthesized schwertmannite remained suspended in the bio-synthesis systems, and the ferrous ions' bio-oxidation efficiency was improved to a certain extent. Due to the friction effect between the introduced schwertmannite and the reactor wall, adhered-sch was eliminated. The outcomes of this study will provide the necessary data for schwertmannite bio-synthesis and arsenic(III) removal from arsenic(III)-bearing groundwater.

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“…However, high concentrations of arsenic (As > 10 µg/L) in groundwater are frequently found in China, India, Nepal, Bangladesh, and other countries [3,[7][8][9]. Chakraborti et al [10] investigated the arsenic contamination of groundwater in Patna district (Bihar, India); the study detected a maximum arsenic concentration of 1466 µg/L and found that 61% and 44% of tube-wells contained arsenic at concentrations that exceeded 10 µg/L and 50 µg/L, respectively.…”

mentioning

confidence: 99%

Heating Changes Bio-Schwertmannite Microstructure and Arsenic(III) Removal Efficiency

et al. 2017

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Schwertmannite (Sch) is an efficient adsorbent for arsenic(III) removal from arsenic(III)-contaminated groundwater. In this study, bio-schertmannite was synthesized in the presence of dissolved ferrous ions and Acidithiobacillus ferrooxidans LX5 in a culture media. Bio-synthesized Sch characteristics, such as total organic carbon (TOC), morphology, chemical functional groups, mineral phase, specific surface area, and pore volume were systematically studied after it was dried at 105 • C and then heated at 250-550 • C. Differences in arsenic(III) removal efficiency between 105 • C dried-sch and 250-550 • C heated-sch also were investigated. The results showed that total organic carbon content in Sch and Sch weight gradually decreased when temperature increased from 105 • C to 350 • C. Sch partly transformed to another nanocrystalline or amorphous phase above 350 • C. The specific surface area of 250 • C heated-sch was 110.06 m 2 /g compared to 5.14 m 2 /g for the 105 • C dried-sch. Total pore volume of 105 • C dried-sch was 0.025 cm 3 /g with 32.0% mesopore and 68.0% macropore. However, total pore volume of 250 • C heated-mineral was 0.106 cm 3 /g with 23.6% micropore, 33.0% mesopore, and 43.4% macropore. The arsenic(III) removal efficiency from an initial 1 mg/L arsenic(III) solution (pH 7.5) was 25.1% when 0.25 g/L of 105 • C dried-sch was used as adsorbent. However, this efficiency increased to 93.0% when using 250 • C heated-sch as adsorbent. Finally, the highest efficiency for arsenic(III) removal was obtained with sch-250 • C due to high amounts of sorption sites in agreement with the high specific surface area (SSA) obtained for this sample.

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Environmental geochemistry of high arsenic groundwater at western Hetao plain, Inner Mongolia

Cited by 31 publications

References 10 publications

Microbial Community of High Arsenic Groundwater in Agricultural Irrigation Area of Hetao Plain, Inner Mongolia

Microbial Community of High Arsenic Groundwater in Agricultural Irrigation Area of Hetao Plain, Inner Mongolia

Schwertmannite Adherence to the Reactor Wall during the Bio-Synthesis Process and Deterioration of Its Structural Characteristics and Arsenic(III) Removal Efficiency

Heating Changes Bio-Schwertmannite Microstructure and Arsenic(III) Removal Efficiency

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