Adsorption of arsenate on synthetic goethite from aqueous solutions

Lakshmipathiraj, P.; Narasimhan, B.R.V.; Prabhakar, S.; Raju, G Bhaskar

doi:10.1016/j.jhazmat.2005.12.015

Cited by 192 publications

(84 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It was possible that arsenic combined to iron do not contribute to specifically-bound fraction. The percentage of amorphous hydrous oxide-bound arsenic is remarkable higher compared FRS (61.1%) sewage sludge to RM (32.3%), this result is consistent with researches done before [25] that arsenic is specifically adsorbed on to iron oxides. Meanwhile, the crystalline hydrous oxide-bound arsenic in FRS is very little.…”

Section: Arsenic Fractionationsupporting

confidence: 92%

Arsenic removal from aqueous solution using ferrous based red mud sludge

Wang

Luan

et al. 2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

a b s t r a c tFerrous based red mud sludge (FRS) which combined the iron-arsenic co-precipitation and the high arsenic adsorption features was developed aimed at low arsenic water treatment in rural areas. Arsenic removal studies shown that FRS in dosage of 0.2 or 0.3 g/l can be used effectively to remove arsenic from aqueous solutions when initial As(V) concentration was 0.2 or 0.3 mg/l. Meanwhile, turbidity of supernatant in disturbing water was lower than 2 NTU after 24 h. The pH range (4.5-8.0) for FRS in effective arsenic removal was applicable in natural circumstance. Phosphate can greatly reduce the arsenic removal efficiency while the presence of carbonate had no significant effect on arsenic removal. Arsenic fractionation experiments showed that amorphous hydrous oxide-bound arsenic was the major components. When aqueous pH was decreased from 8.0 to 4.5, arsenic in FRS was not obviously released. The high arsenic uptake capability, good settlement performance and cost-effective characteristic of FRS make it potentially attractive material for the arsenic removal in rural areas.

show abstract

Section: Arsenic Fractionationsupporting

confidence: 92%

Arsenic removal from aqueous solution using ferrous based red mud sludge

Wang

Luan

et al. 2010

Journal of Hazardous Materials

View full text Add to dashboard Cite

show abstract

“…Most of the applied arsenic adsorbents appear to have a very low removal efficiency for As(III) compared to As(V), due to the predomination of uncharged arsenite species (H 3 AsO 3 ) at pH range encountered in natural waters [26,27]. In practice, when As(III) is present, a chemical or biological pre-oxidation step is embodied [28,29], followed by the removal of arsenic in the form of As(V).…”

Section: Adsorbent Saturation and Regeneration Circuitmentioning

confidence: 99%

A novel approach for arsenic adsorbents regeneration using MgO

Tresintsi

Simeonidis

Katsikini

et al. 2014

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…Inorganic As species As(V) and As(III) are generally considered to be more toxic than organic species for many organisms [4]. Arsenite is more mobile and toxic than As(V) [17] because it is neutral under normal environmental conditions and therefore poor adsorption on soil particles [18]. Trimethylarsine (TMA) is volatilizable and thought to be nontoxic [19,20].…”

Section: Arsenic Species In Paddy Soilmentioning

confidence: 99%

Effects of microbial processes on the fate of arsenic in paddy soil

2012

View full text Add to dashboard Cite

Arsenic (As) is a metalloid toxic to organisms including humans. Arsenic in rice represents a significant exposure pathway for the general population, particularly for those subsisting on rice. Arsenic transformation, namely reduction, oxidation and methylation, in soil-rice systems has fundamental impacts on its mobility and toxicity. In addition to soil chemical properties (pH, Eh, metallic oxides, organic matter), microorganisms play critical roles in As transformation and mobility in paddy soil, such as through ArsM (As(III) S-adenosylmethyltransferase) and interactions with iron oxides or organic matters. Arsenic species in paddy soil directly influence As speciation in rice grain because the methylated As species in rice are mainly derived from microbial methylation in paddy soil. This paper aims to provide an overview on the status of the knowledge and gaps on the chemical aspects of As transformation in soil-rice system in conjunction with microbial ecology and functional genes. In addition, potential pathways (manipulation of microorganisms in paddy soil and genetic engineering) to decrease total As and/or inorganic As in rice grain are proposed.

show abstract

Adsorption of arsenate on synthetic goethite from aqueous solutions

Cited by 192 publications

References 31 publications

Arsenic removal from aqueous solution using ferrous based red mud sludge

Arsenic removal from aqueous solution using ferrous based red mud sludge

A novel approach for arsenic adsorbents regeneration using MgO

Effects of microbial processes on the fate of arsenic in paddy soil

Contact Info

Product

Resources

About