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Removal of As(V), Cr(VI) and Pb(II) from aqueous solution using surfactant-modified Sabzevar nanozeolite

机译:使用表面活性剂改性的Sabzevar纳米沸石从水溶液中去除As(V),Cr(VI)和Pb(II)

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The pollution of water environments is a challenging issue especially in developing countries. Contamination of drinking water with heavy metals has been reported in many parts of the world. Arsenic, chromium and lead are dangerous heavy metals and also common contaminants of drinking water. In this study, the capacity and performance of the surfactant-modified Sabzevar natural nanozeolite (SMSNZ) on the removal of heavy metals from an aqueous solution was investigated. Initially, the appropriate concentration of hexadecyltrimethylammonium bromide HDTMA-Br solution for modification was investigated; it was found that it must be higher than the critical concentration micelle (CMC). Then, the removal of As (V), Cr (VI), and Pb(II) from an aqueous solution was studied using SMSNZ. The results indicated that the removal efficiency was very high in different initial concentrations of heavy metals. The Linear, Langmuir and Freundlich isotherm models were used to investigate the adsorption equilibrium of the surfactant-modified natural zeolite for heavy metals adsorption. The results showed that the Linear isotherm is a better fit for the three studied heavy metals.
机译:水环境的污染是一个具有挑战性的问题,特别是在发展中国家。在世界许多地方,有饮用水被重金属污染的报道。砷,铬和铅是危险的重金属,也是饮用水的常见污染物。在这项研究中,研究了表面活性剂改性的Sabzevar天然纳米沸石(SMSNZ)从水溶液中去除重金属的能力和性能。最初,研究了用于改性的十六烷基三甲基溴化铵HDTMA-Br溶液的适当浓度;发现它必须高于临界浓度胶束(CMC)。然后,使用SMSNZ研究了从水溶液中去除As(V),Cr(VI)和Pb(II)的方法。结果表明,在不同初始浓度的重金属下,去除效率很高。使用线性,Langmuir和Freundlich等温模型研究表面活性剂改性天然沸石对重金属的吸附平衡。结果表明,线性等温线更适合三种研究的重金属。

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