活性炭海绵吸附材料制备及对Pb^2+吸附性能研究  

Study on Preparation of Activated Carbon Sponge Adsorbents and Its Adsorption Performance for Pb^2+

作　　者：刘了 蒋帅 田赐 王东梅 陈怡 龚正君 LIU Liao;JIANG Shuai;TIAN Ci;WANG Dongmei;CHEN Yi;GONG Zhengjun(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;Environmental Monitoring Center of Chengdu,Chengdu 610066,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756 [2]成都市环境监测中心站,四川成都610066

出　　处：《水处理技术》2020年第7期72-75,83,共5页Technology of Water Treatment

基　　金：国家自然基金项目(21777131);四川省重点研发项目(2018GZ0400)。

摘　　要：以聚二甲基硅氧烷(PDMS)和活性炭粉末为基底,利用糖浸溶技术制备了1种活性炭多孔海绵吸附材料(PSA-AC),并对该材料的机械性、孔隙率、亲水性进行优化,获得具有稳定性、吸附性和可回收性的PSA-AC。为探索该材料的吸附性能,系统研究了PSA在不同pH、反应时间、Pb^2+初始含量、选择性吸附等条件下对Pb^2+吸附性能的影响。结果表明,PSA-AC对Pb^2+的优化吸附pH在4.0~5.0,15 h后可达吸附平衡,吸附动力学过程符合准2级动力学方程,吸附等温过程符合Langmuir单分子层吸附,在多种重金属环境中存在选择性吸附。与传统的活性炭吸附材料相比,该材料具有制备简单、操作简便、利于回收等优点。Polydimethylsiloxane(PDMS)and activated carbon powder was used as substrate to fabricate a porous sponge adsorbent with activated carbon(PSA-AC)by sugar leaching-dissolution method.Its mechanical property,porosity and hydrophilia were optimized to make a PSA-AC with stability,adsorption and recyclability.To research the adsorption capability of this adsorbent,the effect of p H,the contact time,initial Pb^2+content,and competitive adsorption on Pb2+adsorption performance by PSA-AC was studied.The results showed that,the optimum pH was 4.0~5.0,adsorption equilibrium was realized after 15 h for Pb^2+adsorption by PSA-AC,the adsorption kinetic process followed the pseudo-second-order kinetic equation,and the adsorption isotherm process fitted Langmuir monomolecular layer adsorption model,and the preferential adsorption existed in the presence of multiple types of heavy metals.In comparison with traditional active carbon adsorbents,the PSA-AC has advantages of simple preparation,easy operation and good recycling.

关 键 词：活性炭 多孔海绵 吸附 PB^2+ 

分 类 号：TQ424[化学工程] X703.1[环境科学与工程—环境工程]