In-situ arsenic remediation by aquifer iron coating: Field trial in the Datong basin, China

Xie, Xianjun; Pi, Kunfu; Liu, Yaqing; Liu, Chongxuan; Zhu, Yapeng; Su, Chunli; Ma, Teng; Wang, Yanxin

doi:10.1016/j.jhazmat.2015.09.055

Cited by 18 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The method involved an alternating injection of Fe(II) (5.0 mM) and NaClO (2.6 mM) to induce the formation of Fe oxides/hydroxides within the aquifer. This process encompassed the oxidation of Fe(II) and As(III) using NaClO, as well as the adsorption/co-precipitation of As(V) in the targeted aquifer [127].…”

Section: In Situ Remediationmentioning

confidence: 99%

Worldwide Distribution, Health Risk, Treatment Technology, and Development Tendency of Geogenic High-Arsenic Groundwater

Guo,

Cao,

Lang

et al. 2024

Water

View full text Add to dashboard Cite

The presence of high concentrations of geogenic arsenic (As) in groundwater poses a serious threat to the health of millions of individuals globally. This paper examines the research progress of groundwater with high concentrations of geogenic As through a comprehensive literature review and analysis, covering distribution, health risks, in situ remediation, regulatory technologies, and development trends, to establish a reference for future research. The global distribution of geogenic high-As groundwater is mainly in inland basins and river deltas of countries in South Asia, East Asia, and South America. High-As risk areas can be modeled using hydrogeologic data and field measurements. This modeling approach allows for assessing and measuring potential areas of high-As groundwater. In order to provide safe drinking water promptly and effectively to areas affected by high-As groundwater, in situ rapid detection and remediation techniques have been given significant attention. This paper introduces household- or community-scale As removal technologies, including flocculant–disinfectant, bucket treatment units, use of activated alumina, use of nano zero-valent iron, aquifer iron coating technology, and bioremediation, summarizing the basic mechanisms of arsenic removal for each technology. Guaranteeing the sustainability of site-scale remediation technologies, reasonable aquifer management, and exploring alternative water sources are crucial for combating high-As groundwater contamination. Future studies should aim to elucidate the mechanisms of As’s coexistence with other pollutants in groundwater, effectively treating As-containing wastes or sludge produced during the treatment process and exploring better treatment options.

show abstract

Section: In Situ Remediationmentioning

confidence: 99%

Worldwide Distribution, Health Risk, Treatment Technology, and Development Tendency of Geogenic High-Arsenic Groundwater

Guo,

Cao,

Lang

et al. 2024

Water

View full text Add to dashboard Cite

show abstract

“…Heavy metals have been known as water contaminants, even at permissible concentrations [1][2][3][4]. Among the heavy metals, arsenic is known as one of the most toxic metals in many parts of the world [5][6][7]. The main sources of arsenic are geological and human activities such as mining and pesticides.…”

Section: Introductionmentioning

confidence: 99%

“…The amount of As (III) and As (V) in water depends on the pH. The dominant form of arsenic in groundwater is the As (III), due to lower bonding to mineral surfaces [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Adsorption and Photocatalytic Removal of Arsenic from Water by a Porous and Magnetic Nanocomposite: Ag/TiO2/Fe3O4@GO

Miranzadeh

Afshari²,

Khataei

et al. 2020

Adv. J. Chem. A

View full text Add to dashboard Cite

As (III) regularly requires oxidation to As (V), before it can be removed from water. Here, we reported photocatalytic removal of As (III) as well as adsorption of As (III) and As (V) using a novel, porous magnetic Ag/TiO2/Fe3O4@GO nanocomposite which was characterized via FT-IR, XRD, SEM, and TEM. A mathematical model (the central composite design) was used to estimate the relationship between the observed adsorption and our set of variables including initial concentration of arsenic ions, adsorbent dosage, pH, and the contact time. An optimum adsorption capacity of about 91% was observed for As (III) using 20 mg adsorbent with 24 ppm initial concentration of As (III), at pH = 5, within 90 min, and room temperature. Likewise, an optimum adsorption capacity of about 87% was observed for As (V) using 11 mg adsorbent with 17 ppm initial concentration of As (V), at pH = 3, within 30 min, and room temperature. The electrostatic factors between surface charge of nanocomposite and arsenic species were used to explain adsorption behavior of As (III) and As (V) at different conditions. The Langmuir isotherm equations best interpreted the nature of adsorption of As (III) and A (V). It was found during phocatalytic process maximum R% was about 63% for As (III) using 40 mg photocatalyst. Arsenic Adsorption Photocatalyst Magnetic nanocomposite Ag nanoparticles M. Miranzadeh et al.

show abstract

Distribution and hydrogeochemical behavior of arsenic enriched groundwater in the sedimentary aquifer comparison between Datong Basin (China) and Kushtia District (Bangladesh)

Huq

Fahad

et al. 2018

Environ Sci Pollut Res

View full text Add to dashboard Cite

A prompt growth in research on arsenic occurrence and behavior in the environment has occurred over the last decade or so. High arsenic (As) in groundwater has become a major global concern due to its widespread occurrence. A comparative hydrogeochemical study was performed on the occurrence of high As groundwater in Datong Basin, China, and Kushtia District, Bangladesh. A total of 132 groundwater samples (83 from Datong Basin and 49 from Kushtia District) were collected to analyze the major hydrogeochemical components and trace elements in groundwater of both areas. Factor analysis (FA) was applied on the hydrochemical data to identify the major hydrogeochemical processes in sedimentary aquifers. High As groundwater was observed in the low-lying central parts of Datong Basin, which are composed of the Holocene alluvial and lacustrine aquifers. The elevated As concentrations ranged from 0.31 to 452 μg/L and distributed in depths between 20 and 45 m. As-enriched groundwater is mainly Na-HCO type water and characterized by higher pH value, high Na, low Ca, SO, and NO along with moderate TDS. The alkaline and reducing subsurface environment facilitate the leaching of As in sedimentary aquifers. The release and distribution of As in aquifers are resulted from the reduction of As-carrying crystalline iron (Fe) oxide/hydroxides and oxidation of organic matter. The aquifers of Kushtia District, Bangladesh, are unconsolidated, alluvial in nature, and developed from Holocene floodplain and Pleistocene deposits. High As (6.04-590.7 μg/L) groundwater occurs mainly in shallow aquifers. The Ca-HCO type groundwater is distinguished by circum-neutral pH, medium-high EC, high HCO, and low content of NO, SO, K, and Cl. The reductive suspension of MnOOH increases the dissolved As loads and redox responsive elements such as SO and pyrite oxidation act as the main mechanisms for As release in groundwater. As is mobilized by anaerobic leakage from the brown-clay and gray-sand into the sediment. Infiltration from irrigation return and surface wash water are the potential factors that remobilize As. The weak loading of Fe suggests that the release of Fe and As is decoupled in sedimentary aquifers of Kushtia District.

show abstract

In-situ arsenic remediation by aquifer iron coating: Field trial in the Datong basin, China

Cited by 18 publications

References 33 publications

Worldwide Distribution, Health Risk, Treatment Technology, and Development Tendency of Geogenic High-Arsenic Groundwater

Worldwide Distribution, Health Risk, Treatment Technology, and Development Tendency of Geogenic High-Arsenic Groundwater

Adsorption and Photocatalytic Removal of Arsenic from Water by a Porous and Magnetic Nanocomposite: Ag/TiO2/Fe3O4@GO

Distribution and hydrogeochemical behavior of arsenic enriched groundwater in the sedimentary aquifer comparison between Datong Basin (China) and Kushtia District (Bangladesh)

Contact Info

Product

Resources

About