改性坡缕石黏土对水中木质素磺酸钠的吸附研究  

Removal of Sodium Lignosulfonate from Aqueous Solution Using Modified Palygorskite as Adsorbent

作　　者：杨翠玲[1] 魏博[1] 王小亮[1] 高淑玲[1] 张哲[1] 

机构地区：[1]西北师范大学化学化工学院甘肃省高分子材料重点实验室生态环境相关高分子材料教育部重点实验室,甘肃兰州730070

出　　处：《精细化工》2013年第4期461-464,480,共5页Fine Chemicals

基　　金：教育部"长江学者和创新团队发展计划"(IRT1177);甘肃省自然科学基金(1010RJZA024)~~

摘　　要：用盐酸和焙烧处理的方法对坡缕石黏土进行了改性,制备了酸处理坡缕石黏土和热处理坡缕石黏土,用XRD和TEM对不同方法处理的坡缕石黏土进行了结构和形貌表征,并使用黏土对木质素磺酸盐废水进行了吸附研究。结果表明,在盐酸浓度为1.0 mol/L,60～70℃,改性处理6 h条件下制得的吸附剂相对于原土及热处理的坡缕石黏土吸附效果最好,动力学研究表明吸附过程符合准二级动力学模型,吸附等温线符合Langmuir吸附模型,其平衡吸附量可达到343.99 mg/g。实验证明该吸附过程是一个放热过程。Palygorskite clays were treated with hydrochloric acid of different concentration and calcinated at different temperatures. The modified palygorskite clays were characterized by means of XRD and TEM, and were used as adsorbents for the removal of sodium lignosulfonate from aqueous solutions. The adsorption experiments show that the modified palygorskite clays which was treated with hydrochloric acid of the concentration of 1.0 mol/L at 60 -70 ~C for 6 h had the best adsorption performance compared with raw palygorskite clays and the calcinated ones. The absorption processes follow pseudo-second order kinetic model very well and the absorption isotherms fit Langmuir equation. The apparent maximum adsorption capacity was 343.99 mg/g. The results indicate that the adsorption process is exothermic.

关 键 词：木质素磺酸钠 坡缕石 吸附 动力学 吸附模型 水处理技术与环境保护 

分 类 号：X5[环境科学与工程—环境工程]