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落叶松改性树皮对金属离子吸附性能的研究
引用本文:张力平,黄贞,刘晓燕.落叶松改性树皮对金属离子吸附性能的研究[J].北京林业大学学报,2004,26(4):69-72.
作者姓名:张力平  黄贞  刘晓燕
作者单位:北京林业大学材料科学与技术学院
摘    要:笔者以廉价易得的落叶松树皮为原料 ,经环氧氯丙烷交联 ,研发了一种新的生物吸附剂 ,并探讨了其对金属离子的吸附性能 .研究结果表明 ,该改性树皮最适宜的处理条件为 :氢氧化钠浓度 0 8mol L ,环氧氯丙烷 2 0mL ,改性温度 5 0℃ ,树皮粒径 1~ 2mm .改性树皮对各种金属离子的最佳吸附条件为 :室温下pH值为 5时对Fe2 + 吸附 3h ;4 5℃ ,pH值为 5 5时对Cu2 + 吸附 3h ;室温下pH值为 6时对Zn2 + 吸附 2h .该改性树皮的吸附符合Langmuir型吸附等温线 ,能有效处理 1~ 10 0mg L的低浓度重金属废水

关 键 词:落叶松树皮  改性  环氧氯丙烷  金属离子  吸附

Absorption properties of modified Larix barks to metal ions
ZHANG Liping,HUANG Zhen,LIU Xiaoyan.School of Material Science and Technology,Beijing Forestry University,P. R. China..Absorption properties of modified Larix barks to metal ions[J].Journal of Beijing Forestry University,2004,26(4):69-72.
Authors:ZHANG Liping  HUANG Zhen  LIU XiaoyanSchool of Material Science and Technology  Beijing Forestry University    P R China
Institution:ZHANG Liping,HUANG Zhen,LIU Xiaoyan.School of Material Science and Technology,Beijing Forestry University,100083,P. R. China.
Abstract:A new biosorbent, modified Larix bark was studied, and its performance for heavy metal ion adsorption was evaluated. Experimental results show that the performance of modified Larix bark related to its preparation and adsorption conditions. The optimum conditions of preparation for sodium hydroxide concentration, the dose of epichlorohydrin, temperature and particle size of Larix bark are 0.8 mol/L, 20 mL per 5 g Larix bark, 50℃ and the range of 1--2 mm respectively. The optimum adsorption conditions for temperature, pH and adsorptive time are room temperature, 5.0 and 3 h for Fe\+\{2+\}, 45℃, 5.5 and 3 h for Cu\+\{2+\}, and room temperature, 6.0 and 2 h for Zn\+\{2+\} respectively. The adsorption of metal ions follows Langmuir isotherm in the tested range. The modified Larix bark can treat waster water with heavy metal ion concentration less than 100 mg/L.
Keywords:Larix bark  modification  epichlorohydrin  metal ion  absorption
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