Center for Environmental Science and Engineering, Indian Institute of Technology, Kanpur, UP 208 016, India.
Bioresour Technol. 2010 Apr;101(7):2173-9. doi: 10.1016/j.biortech.2009.11.027. Epub 2009 Dec 11.
Decontamination of arsenic ions from aqueous media has been investigated using iron chitosan spacer granules (ICS) as an adsorbent. Drying of beads saturated with a spacer sucrose was considered as simple treatment, to prevent the restriction of polymer network and enhance sorption capacity. The novel sorbent was studied in up flow column experiments conducted at different flow rates, pH and bed depth to quantify the treatment performance. It was found that silicate was more inhibitory than phosphate, and the silicate in groundwater controlled the arsenic removal efficiency. The column regeneration studies were carried out for two sorption-desorption cycles using 0.1N NaOH as the eluant. TCLP leaching tests were conducted on the arsenic loaded adsorbent which revealed the containment of arsenic-laden sludge can be managed without adverse environmental impact. The developed procedure was successfully applied for the removal of both As(III) and As(V) from arsenic contaminated drinking water samples.
采用铁壳聚糖间隔基颗粒（ICS）作为吸附剂，研究了从水介质中去除砷离子。将饱和间隔基蔗糖的珠粒干燥被认为是一种简单的处理方法，可以防止聚合物网络的限制并提高吸附能力。在不同流速、pH 值和床深下进行上向流柱实验研究了新型吸附剂，以定量评估处理性能。结果表明，硅酸盐的抑制作用强于磷酸盐，地下水中的硅酸盐控制着砷的去除效率。使用 0.1N NaOH 作为洗脱剂进行了两次吸附-解吸循环的柱再生研究。TCLP 浸出试验表明，载砷吸附剂的封存可以在没有不利环境影响的情况下进行管理。所开发的方法成功应用于从受砷污染的饮用水样品中去除 As(III) 和 As(V)。
