National Environmental Engineering Research Institute, Council of Scientific and Industrial Research, Nehru Marg, Nagpur, India.
J Hazard Mater. 2011 Feb 15;186(1):367-75. doi: 10.1016/j.jhazmat.2010.11.008. Epub 2010 Nov 10.
In the present manuscript a new adsorbent namely copper oxide incorporated mesoporous alumina (COIMA) for removal of arsenic from water is reported. The COIMA was prepared by treating mesoporous alumina with copper sulphate solution followed by calcination at 450°C in the presence of air. Various adsorption isotherm and kinetic parameters were computed using batch adsorption studies to determine the adsorption capacity for As(III) and As(V) and to understand the mechanism of adsorption. It was observed that incorporation of copper oxide improves the adsorption capacity of unmodified alumina from 0.92 to 2.16 mg g(-1) for As(III) and from 0.84 to 2.02 mg g(-1) for As(V). The results revealed that the adsorption follows Langmuir isotherm and pseudo-second-order kinetic models for both As(III) and As(V). The material is capable of simultaneously removing As(III) and As(V) with removal efficiencies of more than 95% for both As(III) and As(V). Assessment of the water quality before and after treatment with COIMA also confirmed that the there is no leaching of copper and other parameters were also within permissible limits of Indian drinking water standard indicating that the COIMA can be used for treatment of arsenic contaminated drinking water.
本手稿报道了一种新型吸附剂，即氧化铜负载介孔氧化铝（COIMA），用于从水中去除砷。COIMA 通过用硫酸铜溶液处理介孔氧化铝，然后在空气中于 450°C 下煅烧制得。通过批量吸附研究计算了各种吸附等温线和动力学参数，以确定对 As(III)和 As(V)的吸附容量，并了解吸附机理。结果表明，氧化铜的掺入将未改性氧化铝对 As(III)的吸附容量从 0.92 提高到 2.16mg/g，对 As(V)的吸附容量从 0.84 提高到 2.02mg/g。结果表明，吸附过程同时符合 Langmuir 等温线和拟二级动力学模型，对 As(III)和 As(V)的去除率均超过 95%。用 COIMA 处理前后的水质评估也证实，铜没有浸出，其他参数也在印度饮用水标准的允许范围内，这表明 COIMA 可用于处理砷污染的饮用水。
