海藻酸钠-改性碳纤维复合材料对水中Cd^2+的吸附研究  

Adsorption of Cd^(2+) in aqueous solution by sodium alginate-modified carbon fiber complex materials

作　　者：薛超[1] 祁佩时[1] 刘云芝[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《环境污染与防治》2016年第11期52-55,共4页Environmental Pollution & Control

基　　金：国家水体污染控制与治理科技重大专项(No.2013ZX07201007)

摘　　要：采用海藻酸钠与改性聚丙烯腈基碳纤维(PAN-CF)制作复合材料吸附去除水溶液中的Cd^(2+),考察不同吸附时间和溶液pH对Cd^(2+)吸附效果的影响。结果表明,改性后PAN-CF的表面官能团增加,表面能提高,相比于未改性PAN-CF制备的复合材料,改性PAN-CF能够缩短复合材料对Cd^(2+)的饱和吸附时间,增加Cd^(2+)饱和吸附量,随着溶液pH的升高,复合材料对Cd^(2+)的吸附量呈先增加后下降的趋势,pH=6时Cd^(2+)的吸附量最大,为162.8mg/g。A novel complex material was prepared with sodium alginate and modified polyacrylonitrile carbon fibers （PAN-CF） as raw materials. The obtained complex material was used for adsorption of Cd^2＋ in aqueous solution. The effect of adsorption time and solution pH on Cd^2＋ adsorption capacity was investigated. Results showed that the surface energy and functional groups of PAN-CF were increased after oxidative modification. Compared with the unmodified PAN-CF,the modified PAN-CF could shorten the saturated adsorption time of Cd^2＋ and enhance the Cd^2＋ adsorption quantity. With the increasing of solution pH, the Cd^2＋ adsorption quantity of complex material was increased first and then decreased. The complex material could achieve the maximum Cd^2＋adsorption quantity of 162.8 mg/g at pH = 6.

关 键 词：碳纤维 海藻酸钠 改性 吸附 CD^2+ 

分 类 号：X703[环境科学与工程—环境工程] TB332[一般工业技术—材料科学与工程]