中北大学学报（自然科学版）2018，Vol.39Issue(5)：566-571,585,7.DOI:10.3969/j.issn.1673-3193.2018.05.014
蒙脱石-钢渣复合吸附颗粒对水中Cd2+的吸附及其它离子的影响研究
Research on Cd2+Adsorption and Effects of Heavy Ions of Montmorillonite-Slag Composite Particle
摘要
Abstract
Taking montmorillonite and slag as raw materials,the composite adsorbent was prepared u-sing industry starch as an additive to study the adsorptive property of Cd2+.The results show that the adsorption performance reaches the optimal when montmorillonite in the proportion of composite adsor-bent was 50%.The best condition of 1∶1 montmorillonite-slag composite particle is that the absorbent dosage with 15 g·L-1,pH value from 5.5 to 6.5.The Cd2+removal rate reached 97.47% in solution with 100 mg/L Cd2+concentration (1.5 g composite particle)with 60min in the condition of 25 ℃ and 5.6 pH value.The adsorption process of composite particle for Cd2+could be well simulated by pseudo-second-order kinetics equation (R2=0.996 0).The adsorption reaction is in line with the Langmuir model with coefficient of 0.974 5,and the maximum adsorption capacity is 9.76 mg·g-1.Further anal-ysis showed that Cu2+and Pb2+ have the competitive effect on Cd2+adsorption,which resulted in the decrease of adsorption quantity.And the competitive influence of Pb2+is stronger than Cu2+.关键词
蒙脱石/钢渣/复合吸附颗粒/Cd2+Key words
montmorillonite/slag/composite particle/Cd2+分类
资源环境引用本文复制引用
来雪慧,闫彩,任晓莉,朱开金,李耀宙,贺晓晨..蒙脱石-钢渣复合吸附颗粒对水中Cd2+的吸附及其它离子的影响研究[J].中北大学学报（自然科学版）,2018,39(5):566-571,585,7.基金项目
山西省高等学校科技创新项目(2014151) （2014151）
山西省自然科学基金资助项目(2015011018) （2015011018）
