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首页> 外文期刊>Water Research >Preparation and evaluation of iron-chitosan composites for removal of As(III) and As(V) from arsenic contaminated real life groundwater
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Preparation and evaluation of iron-chitosan composites for removal of As(III) and As(V) from arsenic contaminated real life groundwater

机译：铁-壳聚糖复合材料的制备及其对砷污染的生活地下水中As（III）和As（V）的去除

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摘要

A study on the removal of arsenic from real life groundwater using iron-chitosan composites is presented. Removal of arsenic(III) and arsenic(V) was studied through adsorption at pH 7.0 under equilibrium and dynamic conditions. The equilibrium data were fitted to Langmuir adsorption models and the various model parameters were evaluated. The monolayer adsorption capacity from the Langmuir model for iron chitosan flakes (ICF) (22.47 ± 0.56 mg/g for As(V) and 16.15 ± 0.32 mg/g for As(III)) was found to be considerably higher than that obtained for iron chitosan granules (ICB) (2.24 ± 0.04 mg/g for As(V); 2.32 ±0.05 mg/g for As(III)). Anions including sulfate, phosphate and silicate at the levels present in groundwater did not cause serious interference in the adsorption behavior of arsenate/arsenite. The column regeneration studies were carried out for two sorption-desorption cycles for both As(III) and As(V) using ICF and ICB as sorbents. One hundred and forty-seven bed volumes of As(III) and 112 bed volumes of As(V) spiked groundwater were treated in column experiments using ICB, reducing arsenic concentration from 500 to <10 μg/l. The eluent used for the regeneration of the spent sorbent was 0.1 M NaOH. The adsorbent was also successfully applied for the removal of total inorganic arsenic down to <10 μg/1 from real life arsenic contaminated groundwater samples.
机译：提出了使用铁-壳聚糖复合材料去除现实生活中地下水中砷的研究。在平衡和动态条件下，通过在pH 7.0下吸附，研究了砷（III）和砷（V）的去除。将平衡数据拟合到Langmuir吸附模型并评估各种模型参数。朗格缪尔模型对壳聚糖铁片（ICF）的单层吸附能力（As（V）为22.47±0.56 mg / g，As（III）为16.15±0.32 mg / g）明显高于铁壳聚糖颗粒（ICB）（As（V）为2.24±0.04 mg / g; As（III）为2.32±0.05 mg / g）。地下水中的硫酸根，磷酸根和硅酸根等阴离子对砷酸根/砷酸根的吸附行为没有造成严重干扰。使用ICF和ICB作为吸附剂对As（III）和As（V）进行了两个吸附-解吸循环的柱再生研究。使用ICB在柱实验中处理了147床体积的As（III）和112床体积的As（V）加标地下水，将砷浓度从500降低至<10μg/ l。用于再生用过的吸附剂的洗脱液为0.1 M NaOH。该吸附剂还成功地用于去除生活中受砷污染的地下水样品中总无机砷，含量低至<10μg/ 1。

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  • 来源
    《Water Research》 |2009年第15期|3862-3870|共9页
  • 作者

    Anjali Gupta; Vivek Singh Chauhan; Nalini Sankararamakrishnan;

  • 作者单位

    Center for Environmental Science and Engineering, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India;

    Center for Environmental Science and Engineering, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India;

    Center for Environmental Science and Engineering, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chitosan; arsenic; removal; adsorption; groundwater;

    机译：壳聚糖砷;去除吸附地下水;

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