Humic acids removal from water by aminopropyl functionalized rice husk ash

被引：91

作者：

Imyim, Apichat ^{[1
]}

Prapalimrungsi, Eakachai ^{[2
]}

机构：

[1] Chulalongkorn Univ, Dept Chem, Fac Sci, Bangkok 10330, Thailand

[2] Chulalongkorn Univ, Interdept Environm Sci, Grad Sch, Bangkok 10330, Thailand

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 184卷 / 1-3期

关键词：

Humic acids; Adsorption; Rice husk ash; Aminopropylation; ACTIVATED CARBON; FULVIC-ACID; HULL ASH; ADSORPTION; SORPTION; ADSORBENTS; SUBSTANCES; OIL;

D O I：

10.1016/j.jhazmat.2010.08.108

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The use of rice husk ash (RHA) as an adsorbent for the adsorption of humic acids from water was studied. Optimum conditions for humic acids adsorption were found in batch method as follows, 60 min equilibrium time and initial in the range of pH 3-4. In addition, RHA was functionalized with 3-aminopropyltriethoxysilane. Again, the adsorption behavior of the modified rice husk ash (RHA-NH(2)) was studied. Optimum conditions for humic acids adsorption were found to be 30 min equilibrium time and initial pH in the range of 3-4. The adsorption capacity of RHA-NH(2) was higher than that of RHA. Experimental adsorption data fitted well with the Langmuir equation and the maximum adsorption capacity was 8.2 mg/g. at pH 6. The column method was also performed. The comparative adsorption efficiencies of RHA-NH(2) and commercial activated carbons showed insignificant difference. The RHA-NH(2) adsorbent was applied for humic acids removal from surface water. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：775 / 781

页数：7

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