摘要
以松树皮作为吸附剂,进行了生物吸附铜离子的性能研究实验.考察了吸附剂颗粒大小、溶液初始pH值、吸附剂用量、吸附时间以及溶液初始浓度等方面对松树皮从水溶液中吸附铜离子的影响,并研究了符合铜离子吸附的平衡热力学和动力学模型.结果表明,平衡数据很好地符合Langmuir吸附等温式和二级反应动力学方程.在25℃下,铜离子初始质量浓度为100 mg/L时,pH为5,吸附剂粒径为0.5 mm,吸附剂用量为0.25 g/L,吸附反应进行300 min达到吸附平衡时,吸附量最大.
The biosorption properties of pine bark in a batch system for the removal of Cu(Ⅱ) ions from aqueous solutions was investigated as a function of particle size,initial pH,biosorbent does,contact time and initial concentration.The aim of this study was to find a suitable equilibrium isotherm and kinetic model for the copper removal.Results show that the equilibrium datas fit well in the Langmiur isotherm and the pseudo-second-order equation provides the best correlation for the biosorption process.When the initial Cu(Ⅱ) ions concentration was 100 mg /L,the optimal biosorption conditions were:pH 5,particle size 0.05 mm,adsorbent dosage 0.25 mg /g,and the equili-brium time was 300 min at 298 K.
出处
《河南科学》
2011年第5期529-533,共5页
Henan Science
基金
水处理与水环境修复教育部工程研究中心开放课题基金项目(WTWER0707)
