煤矸石复合吸附剂对Zn^(2+)的吸附性能  

Adsorption Capability of Compound Coal Gangue Adsorbent to Zn^(2+)

作　　者：张铁军[1] 宋矗森 陈莉荣[1] 姜庆宏[1] 苏洁[1] 王哲[1] 

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《环境保护科学》2016年第5期96-101,共6页Environmental Protection Science

基　　金：内蒙古科技大学创新基金(2014QDL052)资助

摘　　要：采用某洗煤厂的煤矸石和天然粘土石灰石作为主要原料,添加适量的氯化铝制备吸附剂对Zn^(2+)进行吸附,运用SEM技术对吸附剂进行了表征,研究了不同因素对Zn^(2+)去除率的影响,并探讨了吸附机理。实验结果表明:当反应温度为20℃、振荡时间为70 min、废水pH为6、吸附剂投加量为0.5 g时,Zn^(2+)去除率达到96.28%。煤矸石复合吸附剂对Zn^(2+)的吸附符合准二级动力学方程,在高浓度时符合Langmuir等温吸附模型低浓度时符合Freundlich等温吸附模型,且吸附是易发生的。In this study, coal gangue and natural clay limestone from one coal washery was used as the main materials with addition of moderate aluminum chloride for Zn^（2＋） adsorption. The adsorbent was characterized by SEM and the influences of different factors on Zn^（2＋） removal rate were studied. The adsorption mechanism was also discussed. The experimental result showed that when the reaction temperature was 20℃, p H of the wastewater was 6, the adsorbent dosage was 0.5 g, and the oscillating time was 70 min, the removal rate of Zn^（2＋） reached to 96.28%. The adsorption of Zn^（2＋） on the compound coal gangue adsorbent complied with the pseudo-second-order kinetics equation and conformed to the Langmuir adsorption model at high concentration and the Freundlich adsorption model at low concentration, with the adsorption easy to occur.

关 键 词：复合吸附剂 煤矸石 锌离子 吸附等温线 吸附动力学 

分 类 号：X752[环境科学与工程—环境工程]