Removal of arsenic using hardened paste of Portland cement: batch adsorption and column study

被引：117

作者：

Kundu, S

Kavalakatt, SS

Pal, A

Ghosh, SK

Mandal, M

Pal, T ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, India

[2] Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India

来源：

WATER RESEARCH | 2004年 / 38卷 / 17期

关键词：

Portland cement; adsorption; arsenate removal; adsorbent; column study;

D O I：

10.1016/j.watres.2004.06.018

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Hardened paste of Portland cement (HPPC) has been used as a low-cost adsorbent for the removal of arsenic from water environment. Results from the batch experiments, conducted at an initial concentration of 0.2 ppm of arsenate, suggest arsenate removal up to 95%. Kinetic profiles were developed for various conditions. Effects of adsorbent dose, common ions such as Ca2+, Mg2+, Fe3+, Fe2+, Cl-, SO42-,NO3-, PO4-3 and of pH were studied in detail. Adsorption isotherm studies revealed that the Freundlich isotherm was followed with a better correlation than the Langmuir isotherm. Arsenite could also be removed up to similar to88% using the same material, HPPC. Finally, column studies were undertaken involving the new HPPC to check the suitability of the material for the removal of total arsenic content from water body. Kinetic experiments for the removal of arsenic by column studies revealed a film diffusion mechanism. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：3780 / 3790

页数：11

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