Arsenic: An Overview of Applications, Health, and Environmental Concerns and Removal Processes

Mudhoo, Ackmez; Sharma, Sanjay K.; Garg, V.K.; Tseng, Chin‐Hsiao

doi:10.1080/10643380902945771

Cited by 151 publications

(77 citation statements)

References 260 publications

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“…Due to the prevalence of As contamination worldwide and the threat of arsenicosis [43], research and the development of methods to understand As chemistry and to attenuate As in water are imperative [44]. Methods that have been developed to attenuate As such as electrocoagulation and electrodialysis [45,46], treatment with microorganisms to affect the biogeochemical cycling of As [7], and the adsorption of As onto a variety sorbents [47][48][49].…”

Section: Arsenic Treatment Methodsmentioning

confidence: 99%

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

2014

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A review of the literature about calculating the adsorption properties of arsenic onto mineral models using density functional theory (DFT) is presented. Furthermore, this work presents DFT results that show the effect of model charge, hydration, oxidation state, and DFT method on the structures and adsorption energies for As (oxyhydr)oxide cluster models were calculated using planewave and cluster-model DFT methods.

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Section: Arsenic Treatment Methodsmentioning

confidence: 99%

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

2014

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“…Arsenic toxicity and chronic arsenicosis is of an alarming magnitude particularly in South Asia and is a major environmental health disaster (Bhattacharya et al, 2007;Chakraborti et al, 2004;Kapaj et al, 2006). Chronic arsenic ingestion from drinking water has been found to cause carcinogenic and noncarcinogenic health effects in humans (ATSDR, 2003a;Mudhoo et al, 2011;USEPA 2008USEPA , 2010aUSEPA , 2010b. The growing awareness of arsenic-related health problems has led to a rethinking of the acceptable concentration in drinking water (Sawyer et al, 2003).…”

Section: Arsenicmentioning

confidence: 99%

“…The toxicity of arsenic in its inorganic form has been known for decades under the following forms: acute toxicity, subchronic toxicity, genetic toxicity, developmental and reproductive toxicity (Chakraborti et al, 2004), immunotoxicity (Sakurai et al, 2004), biochemical and cellular toxicity, and chronic toxicity (Mudhoo et al, 2011;Schwarzenegger et al, 2004). Drinking water is one of the primary routes of exposure of inorganic arsenic (Mudhoo et al, 2011;National Research Council, 2001). Ingestion of groundwater with elevated arsenic concentrations and the associated human health effects are prevalent in several regions across the world.…”

Section: Arsenicmentioning

confidence: 99%

Heavy Metals and Human Health

Morais¹,

Costa²,

Pereira³

2012

Environmental Health - Emerging Issues and Practice

203

138

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“…Eh 0-100 mv) (Masscheleyn et al 1991). Other As forms including HAsS 2 , arsine, and arsenic metal may appear under the extreme reducing and low pH conditions (Mudhoo et al 2011), but these species are not stable and thus negligibly relevant to plant uptake in aerobic conditions (Ning 2002). …”

Section: Biotic and Abiotic Factors Affecting Mineral Dissolution Andmentioning

confidence: 99%

“…In nature, As is present in four common chemical valences, -3, 0, +3 and +5, among which metalloid arsines (zero valences) are unstable in oxidising conditions (Mudhoo et al 2011). …”

Section: Basic Chemistry and Chemical Forms In Aqueous Phase And Planmentioning

confidence: 99%

Effects of magnetite removal on the distribution and speciation of Arsenic in copper tailings and its accumulation in native grass

Liu¹

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Arsenic (As) is considered a significant pollutant in neutral-alkaline copper (Cu) tailings, which may be transported off site via seepage and/or runoff from tailings storage facilities. Iron (Fe) oxides and oxyhydroxides, with their high specific surface area and As affinity, play an important role adsorbing inorganic As in contaminated soil and water. In addition, organic matter (OM) and the resulting organic molecules can not only directly influence As chemical forms through competing functional groups of OM (such as phenolic, carboxyl, hydroxyls, etc.), but OM can also catalyse the transformation of Fe-primary minerals into secondary minerals such as Feoxyhydroxides via microbe-mediated processes. At the Ernest Henry Mine (North Queensland, EHM), the Cu ore processing circuit has recently been modified to recover magnetite (Fe 3 O 4 ) from tailings, which could reduce magnetite concentration in the tailings from 20-30% to as low as 3-5%. However the environmental risks of As mobility in the low magnetite (LM) tailings are yet to be investigated.The present study aimed to investigate the effects of magnetite removal and direct revegetation treatments on As distribution, solubility, and speciation in relation to plant As accumulation in the Cu-tailings. It is hypothesized that the distribution of As into exchangeable and soluble forms may be increased in the low magnetite (LM) tailings, due to the much reduced As adsorption capacity associated with the magnetite and the resultant Fe-oxyhydroxides coating on the surfaces of magnetite following redox processes. In addition, the increased distribution of As into the pore water of the LM tailings may favour As conversion from the inorganic into the organic forms under organic matter amendment and direct revegetation with native grass species. Both LM and high magnetite (HM) tailings were amended with 5% sugarcane residues as a basal treatment to ensure plant survival, in combination with 0, 1 and 5% pine-biochar, in which native grass Red Flinders (Iseilema Vaginiflorum) plants were grown for 4 weeks under glasshouse conditions. Arsenic distribution in the LM and HM tailings was fractionated before and after direct revegetation treatments.The intrinsic As adsorption capacity in the HM tailings was significantly higher than that in the LM. Following the organic matter and direct revegetation treatments, As distribution in the specifically adsorbed and amorphous Fe oxyhydroxide increased in the LM tailings but declined in the HM tailings, compared to the unamended tailings. Total As concentration in the pore water of LM tailings increased by 6-7 fold compared to those in the HM tailings. In the amended and revegetated tailings treatments, As concentrations in the pore water of the LM tailings were significantly elevated compared to those in the HM. The proportion of inorganic As species in the pore water of the LM tailings was approximately 50% higher than those in the HM.After 4 weeks of treatment, the native grass accumulated up to 137 mg kg -1 As in th...

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Arsenic: An Overview of Applications, Health, and Environmental Concerns and Removal Processes

Cited by 151 publications

References 260 publications

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

Arsenic Adsorption onto Minerals: Connecting Experimental Observations with Density Functional Theory Calculations

Heavy Metals and Human Health

Effects of magnetite removal on the distribution and speciation of Arsenic in copper tailings and its accumulation in native grass

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