Egirani D E, Baker A R, Andrews J E
School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, United Kingdom.
J Colloid Interface Sci. 2005 Nov 15;291(2):326-33. doi: 10.1016/j.jcis.2005.05.006. Epub 2005 Jul 11.
This study investigates Cu and Zn removal onto binary mixed mineral sorbents from simulated wastewater, relevant to streams impacted by acid mine drainage and effluents. Mixed suspensions of kaolinite/montmorillonite and kaolinite/goethite exhibited different sorption behavior from the single mineral components, reducing Cu and Zn removal (except Cu sorbed on montmorillonite/goethite) over the range of pH investigated. Cu and Zn removal by the electrolyzed systems showed a complex response to increased ionic strength, which increased solid concentration, leading to lower Cu and Zn sorption. Enhanced Cu sorption on the montmorillonite/goethite as age increased may be attributed to increased hydroxylation of the mineral surface resulting in the formation of new reactive sites.
本研究调查了二元混合矿物吸附剂对模拟废水中铜和锌的去除情况，该模拟废水与受酸性矿山排水和废水影响的溪流相关。高岭土/蒙脱石和高岭土/针铁矿的混合悬浮液表现出与单一矿物成分不同的吸附行为，在所研究的pH范围内降低了铜和锌的去除率（除了吸附在蒙脱石/针铁矿上的铜）。电解系统对铜和锌的去除对离子强度增加呈现出复杂的响应，离子强度增加会使固体浓度升高，导致铜和锌的吸附降低。随着老化时间增加，蒙脱石/针铁矿对铜的吸附增强可能归因于矿物表面羟基化增加，从而形成了新的反应位点。
