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Speciation-dependent studies on removal of arsenic by iron-doped calcium alginate beads

被引：31
作者：
Banerjee, Anupam
Nayak, Dalia
Lahiri, Susanta
机构：
[1] Univ Calcutta, Dept Bot, Kolkata 700019, W Bengal, India
[2] Saha Inst Nucl Phys, Div Chem Sci, Kolkata 700064, W Bengal, India
来源：
APPLIED RADIATION AND ISOTOPES | 2007年 / 65卷 / 07期
关键词：
speciation; biopolymer; iron calcium alginate beads; arsenite; arsenate; As-76;
D O I：
10.1016/j.apradiso.2007.02.007
中图分类号：
O61 [无机化学];
学科分类号：
070301 [无机化学]; 081704 [应用化学];
摘要：
This work aims to study the differential attitude of Fe-doped calcium alginate (Fe-CA) beads towards As(III) and As(V) compounds so that speciation-dependent environmentally sustainable methodologies can be developed for removal of arsenic from contaminated water. Throughout the experiment, As-76 has been used as precursor of stable arsenic. The affinity of As(V) towards the Fe-CA beads is greater than that of As(III). Removal efficiency of Fe-CA beads for As(V) increases with increasing number of beads and longer shaking times. At pH 3, 30 Fe-CA beads remove As(V) completely from a solution containing 20 mg kg(-1) As(V). The technique has been successfully applied to the ground water collected from an arsenic-contaminated area. (C) 2007 Elsevier Ltd. All rights reserved.
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页码：769 / 775
页数：7
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