期刊论文

Li, X.-M.

中文

过程工程学报

1009-606X

2011

11

6

990-993

国家自然科学基金资助项目（编号:51078128）； 湖南省创新平台开放基金资助项目（编号:09k099）； 湖南省重点建设学科基金资助项目；

本校为其他机构

以废弃香芋柄作为新型生物吸附剂，通过静态吸附实验，研究了pH、温度、吸附时间、Mn~(2+)初始浓度等因素对香芋柄吸附Mn~(2+)的影响，分析了吸附过程的热力学、动力学和等温吸附规律。结果表明，溶液初始pH=4，香芋柄用量6 g/L,30℃下吸附60 min，溶液中Mn~(2+)吸附去除率达90.79%以上，吸附容量高达18.16 mg/g。应用Langmuir和Freundlich模型描述香芋柄对Mn~(2+)的吸附过程，结果显示Freundlich吸附等温线拟合效果更好。吸附动力学实验数据符合准二级动力学模型。计算得到热力学参数ΔG0, ΔS>0，表明该吸附过程是自发和吸热的过程

With waste taro stem as novel biosorbent, the effects of pH value, temperature, adsorption time and Mn 2+ initial concentration on the biosorption capacity of taro stem for Mn 2+ were studied by static adsorption experiment. The unit mass of adsorption process was analyzed in thermodynamics and kinetics and adsorption isotherm. The results showed that removal rate of Mn 2+ in wastewater was more then 90.79% and adsorption capacity up to 18.16 mg/g when taro stem usage was 6 mg/L, adsorption time 60 min, initial pH 4 of wastewater and temperatur...