Zr-MMT纳米材料吸附铬鞣废水中Cr(Ⅲ)的研究  

The adsorbtion of Cr(Ⅲ)in tanning wastewater by Zr-MMT nanomaterial

作　　者：黑亚妮 马宏瑞[1] 郭颖艳[1] 鄂涛[1,2] 

机构地区：[1]陕西科技大学资源与环境学院,西安710021 [2]海宁皮革研究院,浙江海宁314400

出　　处：《功能材料》2016年第3期51-55,63,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21177079)

摘　　要：以纳米蒙脱土(MMT)为原料,Zr(SO4)2为改性剂,采用浸渍法制备Zr-MMT用于处理低浓度含Cr(Ⅲ)废水,并研究了Zr-MMT纳米材料的吸附机理。采用X射线衍射(XRD)和扫描电子显微镜(SEM)对Zr-MMT纳米材料进行表征。结果表明,吸附后的Zr-MMT表面有Cr(Ⅲ)存在;Zr-MMT对Cr(Ⅲ)的吸附方式主要有离子交换、静电吸附和表面吸附,并且该吸附过程可以用二级动力学方程和Langmuir方程进行很好的拟合。解决了鞣制废物资源化利用中Zr(OH)4和ZrO2在强酸强碱性条件下不稳定的问题,制得了一种稳定性好的纳米吸附材料。Zr-MMT was prepared by inserting Zr(SO4)2into nano-montmorillonite(MMT),which was used for treating the low concentration Cr(Ⅲ)-containing wastewater.Zr-MMT nanomaterial adsorption mechanism was studied.Zr-MMT nanomaterial was characterized by XRD and SEM.The Results show that Cr(Ⅲ)has been adsorbed on the surface of Zr-MMT,the adsorption process are mainly ion exchange,electrostatic adsorption and surface adsorption;the adsorption process followed the pseudo-second-order kinetic model and obeyed the Langmuir isotherm model.Under the condition of strong acid and strong alkaline,the instability problems of Zr(OH)4and ZrO2 in tanning waste resourcing were settled and made a stabilized nano-adsorbent.

关 键 词：鞣制废物 Zr-MMT 吸附 制革废水 Cr(Ⅲ) 

分 类 号：TS5[轻工技术与工程—皮革化学与工程]