坡缕石黏土污泥对水相中亚甲基蓝吸附研究  

Study on methylene-blue adsorption from water phase by palygorskite clay sludge

作　　者：高淑玲[1] 杨翠玲[1] 罗鑫圣[1] 周鹏鑫[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：《中国环境科学》2014年第1期78-84,共7页China Environmental Science

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(1208RJYA055)

摘　　要：利用坡缕石黏土污泥(从木质素磺酸钠废水中得到)和酸化的坡缕石黏土(1mol/L盐酸)作为吸附剂对水相中的亚甲基蓝进行吸附研究,并利用透射电镜(TEM)、红外光谱(FT-IR)、X-射线衍射(XRD)及Zeta电位分析对两种吸附剂的结构及表面电性进行了表征.结果表明:当吸附剂用量为10mg,温度为30℃时,1mol/L盐酸酸化的坡缕石黏土最大吸附量为97.50mg/g,坡缕石黏土污泥最大吸附量为98.7mg/g.选取坡缕石黏土污泥作为最佳吸附剂,对污泥吸附亚甲基蓝的吸附等温线、吸附热力学及吸附动力学模型进行了研究,结果显示:此吸附过程为自发吸热过程,吸附等温线更符合Langmuir模型,吸附动力学符合准二级动力学模型.The absorption effect of the palygorskite clay sludge （obtained from the sodium lignosulfonate wastewater） and acid-treated palygorskite （lmol/L HCL） was investigated, methylene blue in aqueous solution as an adsorbate. The structure and surface electricity-performance of two types of adsorbents were characterized by transmission electron microscopy （TEM）, FT-IR spectroscopy （FT-IR）, X-ray photoelectron spectroscopy （XRD） and zeta potential. The results showed that the maximum adsorption capacities ofpalygorskite clay sludge and acid-treated palygorskite were 98.7mg/g and 97.50mg/g at 30℃, respectively. When the palygorskite clay sludge was selected as the adsorbent, the absorption process was spontaneous endothermic, the adsorption isotherms followed Langmuir equation, and the dynamic data fitted pseudo-second order kinetic model well.

关 键 词：坡缕石黏土污泥 亚甲基蓝 吸附热力学 动力学 吸附模型 

分 类 号：X703.5[环境科学与工程—环境工程]