膨润土对煤矸石溶出重金属Zn^(2+)的吸附研究  

Study on Adsorb-Ability of Zn^(2+)Leaching from Coal Gangue by Bentonite

作　　者：杨成 张雁[1] 赵蓉 任建国 Yang Cheng;Zhang Yan;Zhao Rong;Ren Jianguo(College of Energy and Transportation Engineering,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018;Hulun Buir Vocational and Technical College,Hulun Buir,Inner Mongolia 021008;Inner Mongolia Road&Bridge Engineering Detection Co.,Ltd.,Hohhot,Inner Mongolia 010018)

机构地区：[1]内蒙古农业大学能源与交通工程学院,内蒙古呼和浩特010018 [2]呼伦贝尔职业技术学院,内蒙古呼伦贝尔021008 [3]内蒙古路桥工程技术检测有限责任公司,内蒙古呼和浩特010018

出　　处：《非金属矿》2021年第2期84-86,共3页Non-Metallic Mines

基　　金：国家自然科学基金(51669025);内蒙古自治区研究生教育教学改革与实践项目(YJG20181012901)。

摘　　要：采用淋溶吸附试验,考察煤矸石淋溶液pH值、膨润土用量、吸附时间、重金属浓度4个指标,研究膨润土对煤矸石淋溶液中重金属Zn^(2+)的吸附效果。结果表明,吸附过程在96 h后达到平衡状态;最佳膨润土掺量为30%,该掺量下吸附达到平衡时Zn^(2+)吸附率均大于72%;吸附平衡状态下,膨润土对煤矸石淋溶液中Zn^(2+)吸附量随pH值增加而减小;吸附过程符合双常数模型。The leaching adsorption test was used to study the adsorption effect of bentonite on the heavy metal Zn^(2+)in the coal gangue leaching solution by changing pH value of the coal gangue leaching solution,amount of bentonite,adsorption time,and concentration of Zn^(2+).The results showed that the adsorption process reached an equilibrium state after 96 h,the optimum amount of bentonite was 30%,under this condition,the adsorption rate of Zn^(2+)was higher than 72%.The amount of Zn^(2+)in the coal gangue leaching solution adsorbed by bentonite decreased with the increase of pH value,and the adsorption process conformed to the double constant model.

关 键 词：膨润土 煤矸石 重金属Zn^(2+) 吸附动力学模型 

分 类 号：TQ424.2[化学工程]