A comparative study on enhanced arsenic(V) and arsenic(III) removal by iron oxide and manganese oxide pillared clays from ground water
IR@NML: CSIR-National Metallurgical Laboratory, Jamshedpur
View Archive Info| Field | Value | |
| Title |
A comparative study on enhanced arsenic(V) and arsenic(III) removal by iron oxide and manganese oxide pillared clays from ground water
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| Creator |
Mishra, T
Mahato, D K |
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| Subject |
Environmental engineering
Chemical Engineering |
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| Description |
Stable iron and manganese oxide pillared clays were synthesized with high surface area and studied as
adsorbents for the
first time towards As(III) and As(V) so as to understand the role of both oxide pillars for
both As(III) and As(V) adsorption. Both the pillared clay materials showed high surface area (>260 m2/g)
and thermal stability (up to 500 C). Equilibrium studies were carried out at different concentration using
three different materials at pH of 6 at 28 C. For both As(III) and As(V) adsorption the uptake capacity of
pillared materials is found to be many fold in comparison to the starting clay. Manganese oxide pillared
material shows better affinity towards As(III) due to in situ oxidation to As(V). Synergistic effect of high
surface area and presence of active manganese oxide pillars helps in enhanced uptake of total arsenic
including substantial amount of As(III). Studies on mixed arsenic solution with mixed adsorbent proved
to be much better than the individual adsorbent particularly for the contaminated water with substantial amount of As(III). Arsenic uptake in presence of Fe(III) and Cl shows negligible decrease in the efficiency. Both the pillared material performed much better when subjected to actual contaminated water continuously for ten times. No leaching of arsenic was observed which confirms the possibility of using these materials in actual field trial for enhanced arsenic removal for contaminated water.
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| Publisher |
Elsevier
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| Date |
2016-03
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://eprints.nmlindia.org/7448/1/Arsenic-2016-Env.Chem.Engg.pdf
Mishra, T and Mahato, D K (2016) A comparative study on enhanced arsenic(V) and arsenic(III) removal by iron oxide and manganese oxide pillared clays from ground water. Journal of Environmental Chemical Engineering, 4 (IF-1.355). pp. 1224-1230. |
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| Relation |
http://dx.doi.org/10.1016/j.jece.2016.01.022
http://eprints.nmlindia.org/7448/ |
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