生物吸附剂对含铜废水的吸附性能研究  

Effect of bio-adsorbent on sportive characteristics of Cu(II) containing wastewater

作　　者：陆筑凤[1] 李加友[1] 

机构地区：[1]嘉兴学院生物与化学工程学院,浙江嘉兴314001

出　　处：《中国酿造》2014年第11期127-130,共4页China Brewing

基　　金：浙江省教育厅科研项目资助(Y201330035);嘉兴市科技计划项目资助(2014AY21007)

摘　　要：利用水稻秸秆发酵后碱液浸提酸沉淀的方法制备生物质吸附剂,对该吸附剂的性质和含铜废水的吸附性能展开了研究。采用平衡吸附法研究吸附剂的投入量、体系p H、铜离子浓度对吸附剂吸附水中铜离子的影响。研究结果表明,吸附剂适合处理低浓度含铜废水(铜离子浓度低于100 mg/L,吸附去除率高于80%),当吸附剂用量1.5 g/L、p H 5.0时,对20 mg/L Cu2+的去除率达到最大值为96.45%。该生物吸附剂以单分子层吸附为主,吸附等温线符合Langmuir方程,饱和吸附量为61.976 3 mg/g,动力学行为符合拟二级动力学模型。The rice straw m aterials w ere m odified by ferm entation and alkalileaching acid precipitation to prepare a novelbio-adsorbent.The aim of the study w as to identify the underlying characteristics ofthe bio-adsorbenton C u（II）ions.The effectofadsorbentaddition,solution pH and initial concentration ofC u（II）ionson the adsorption capacity ofthe bio-adsorbentw ere studied by equilibrium adsorption approach.The resultsshow ed that the bio-adsorbenthas high adsorption oflow concentration ofcopperions （copperion concentration w as below 100 m g/L,the adsorption rate w as higherthan 80% ）,w hen adsorbentdosage w as 1.5 g/L,pH 5.0,the rem ovalrate of20 m g/L C u（II）ions reached to the m axim um value of96.45% . A nd the bio-adsorbentgave priority to m onolayeradsorption process,adsorption isotherm conform ed to the Langm uirequation,the saturated adsorp-tion capacity w as61.976 3 m g/g,and the dynam icsbehaviorconform ed to pseudo-second-orderkinetic m odel.

关 键 词：水稻秸秆 生物改性 吸附剂 铜离子 

分 类 号：TQ920.9[轻工技术与工程—发酵工程]