【摘要】 针对水体中Cd²⁺污染问题,采用生态安全型火山渣进行吸附低温水体中Cd²⁺的实验研究,分析火山渣吸附Cd²⁺的效果及影响因素.结果表明:火山渣是一种具有潜在应用价值的Cd²⁺吸附剂,1.00g火山渣对10℃,0.5mg/L水体中Cd²⁺的去除率达97.10%;接近中性环境有利于吸附Cd²⁺;Ca²⁺,Mg²⁺,NO₃^-对火山渣吸附Cd²⁺有抑制作用,Fe²⁺和Mn²⁺的抑制作用较小;当NH₄⁺和NO₂^-的质量浓度低于50mg/L时,对吸附无影响,当其质量浓度大于50mg/L时,对吸附有抑制作用;SO24-对吸附作用无影响;质量浓度较大的HCO₃^-对吸附Cd²⁺有促进作用.更多还原

【Abstract】 Aiming at the problem of Cd²⁺pollution in water,the experiment of Cd²⁺adsorption by ecologically safe scoria in low temperature water was carried out,and we analyzed the effect and influence factors of Cd²⁺adsorption by scoria.The results show that scoria is a kind of Cd²⁺adsorbent with potential value.The removal rate reaches 97.10%in 0.5 mg/L Cd²⁺solution using 1.00 g scoria at 10℃.The neutral environment is conducive to adsorbing Cd²⁺.Ca²⁺,Mg²⁺and NO₃^-in groundwater can inhibit the adsorption of Cd²⁺by scoria,while Fe²⁺and Mn²⁺have little inhibitory effect.When the mass concentrations of NH₄⁺ and NO₂^- are less than 50 mg/L,they have no effects on the adsorption of Cd²⁺ by scoria.When the mass concentrations are more than 50 mg/L,they have inhibitory effects on the absorption.SO₄^2- has no effect on the adsorption.HCO₃^- with higher mass concentration has promotion effect on the adsorption of Cd²⁺by scoria.更多还原