核桃壳对水中Fe^(3+)吸附性能的研究  

Absorption capability of walnut shells for Fe^(3+) removal from aqueous solution

作　　者：商平[1] 王玉兰[1] 蔡旭艳[1] 刘涛利[1] 

机构地区：[1]天津科技大学海洋科学与工程学院,天津300457

出　　处：《甘肃农业大学学报》2011年第1期105-109,共5页Journal of Gansu Agricultural University

基　　金：天津市科技支撑计划重点项目(08ZCKFSH01600);天津市农业科技成果转化与推广项目(0802020)

摘　　要：利用核桃壳研究其对水中Fe3+的吸附性能及吸附质溶液pH、Fe3+质量浓度、核桃壳用量、粒径、吸附温度和时间(吸附动力学)对核桃壳吸附Fe3+效果的影响.结果表明:吸附质溶液pH值为3,Fe3+起始质量浓度为50mg·L-1、吸附剂粒径为0.15mm时的吸附效果最佳;二级动力学模型能很好的描述核桃壳对水溶液中Fe3+的吸附动力学过程(R2=0.999 9);核桃壳对Fe3+的动态试验吸附量为2.275mg.g-1,吸附后用HCl洗脱,洗脱率95.2%,洗脱后再吸附量为1.69mg.g-1.The ability of walnut shells to remove Fe3＋ from aqueous solution by adsorption was studied on the effects of pH,mass concentration,dose and size of the adsorbent,contact time and temperature.The results showed that optimum adsorption condition occurred at pH 3,initial mass concentration 50 mg·L-1,particle size 0.15 mm.The processes of adsorption kinetics could be suitably described by pseudo-second-order kinetic model（R2=0.999 9）.Adsorption capacity for dynamic test was 2.275 mg·g-1,the used adsorbents could be reused after elution with HCl,the elution efficiency was 95.2 %.The adsorption capacity of walnut shells declined to 1.69 mg·g-1,which was 74.3 % of fresh walnut shells.

关 键 词：核桃壳 FE3+ 吸附 

分 类 号：X52[环境科学与工程—环境工程]