Hg(II) Adsorption from Aqueous Solutions Using Rice-Husk Ash

Rice-husk ash (RHA) was found to be a good adsorbent for Hg(II) in aqueous solutions. Batch studies indicated that the percent adsorption decreased with increasing initial concentration of Hg(II) and particle size of adsorbent. Twenty g L of RHA (diameter 37-50 m) in an aqueous solution of Hg(II) wi...

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Bibliographic Details
Published in:	Journal of environmental engineering (New York, N.Y.) Vol. 121; no. 6; pp. 479 - 481
Main Authors:	Tiwari, D. P, Singh, D. K, Saksena, D. N
Format:	Journal Article
Language:	English
Published:	Reston, VA American Society of Civil Engineers 01-06-1995
Subjects:	Applied sciences Exact sciences and technology Other wastewaters Pollution TECHNICAL NOTES Wastewaters Water treatment and pollution Adsorption Batchwise Medium effect Ash Concentration effect Waste reuse pH Aqueous solution Waste water purification Mercury
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Summary:	Rice-husk ash (RHA) was found to be a good adsorbent for Hg(II) in aqueous solutions. Batch studies indicated that the percent adsorption decreased with increasing initial concentration of Hg(II) and particle size of adsorbent. Twenty g L of RHA (diameter 37-50 m) in an aqueous solution of Hg(II) with an initial concentration of 100 mg L removed 98% of Hg(II). A contact time of 3 hr was found to be optimum. Maximum Hg(II) removal was observed near a pH of 6.0. Adsorption conformed to the Langmuir isotherm. Column experiments indicated that the adsorbed amount of Hg(II) decreased with increasing flow rate and decreasing bed height.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0733-9372 1943-7870
DOI:	10.1061/(ASCE)0733-9372(1995)121:6(479)