黄原酸化改性凹凸棒土对Pb2+的去除性能

以NaOH和CS₂为黄原酸化剂,MgSO₄为稳定剂,黄原酸化改性凹凸棒原土(N-XAP)制得了黄原酸化凹凸棒土(X-ATP).X-ATP对Pb²⁺具有良好的吸附性能,采用单因素试验得到在其处理含Pb²⁺模拟废水时的最佳条件为温度20～25 ℃、起始质量浓度400 mg·L^-1、吸附剂质量浓度2.0 g·L^-1、pH值5.0～6.0、振荡吸附时间30 min.最高去除率可达99.82%,Pb²⁺残余质量浓度为0.720 0 mg·L^-1,低于国家1级排放标准.对X-ATP及其原料进行了SEM、XRD和粒度分析等结构表征,进一步佐证了其对Pb²⁺的良好吸附性能.

The Study of Adsorption Performance of Organic Modified Attapulgite for Pb2+

Useing NaOH and CS₂ as xanthogens,MgSO₄ as stabilizers,and xanthate modifies attapulgite(N-XAP)to prepare xanthate attapulgite(X-ATP).X-ATP has good adsorption performance for Pb²⁺.The single factor test is used to obtain the best conditions for treating simulated wastewater containing Pb²⁺:temperature 20—25 ℃,initial concentration 400 mg·L^-1,adsorbent dosage 2.0 g·L^-1,pH 5.0—6.0,shaking adsorption time 30 min.The highest removal rate can reach 99.82%,and the Pb²⁺ residual concentration is 0.720 0 mg·L^-1,which is lower than the national first-level emission standard.The structural characterization of X-ATP and its raw materials by SEM,XRD and particle size analysis further prove its good adsorption performance for Pb²⁺.