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当前位置: 首页 > 文章 > 锰氧化物改性硅藻土吸附Pb~(2+)特性的研究 中南林业科技大学学报 2013 (11) 134-138
Position: Home > Articles > Studies on characteristics of adsorption Pb~(2+) of modif ied diatomite by manganese oxide Journal of Central South University of Forestry & Technology 2013 (11) 134-138

锰氧化物改性硅藻土吸附Pb~(2+)特性的研究

作  者：
罗文连;吴晓芙
单  位：
中南林业科技大学环境科学与工程研究中心
关键词：
改性硅藻土;锰氧化物;吸附时间;Pb2+;模拟废水
摘  要：
采用锰氧化物改性硅藻土并应用于处理含Pb2+模拟废水,研究了改性硅藻土用量、吸附时间、废水中污染物浓度和pH值对改性硅藻土吸附Pb2+的影响,研究了其吸附等温式和吸附动力学。结果表明:随着投加量的减少,离子初始浓度提高,pH值的增大,吸附时间延长,硅藻土对Pb2+吸附量增大;改性硅藻土对Pb2+的等温吸附符合Langmuir模型;改性硅藻土对Pb2+的吸附动力学模型可以很好的与双常数扩散方程吻合。
译  名：
Studies on characteristics of adsorption Pb~(2+) of modif ied diatomite by manganese oxide
作  者：
LUO Wen-lian;WU Xiao-fu;Institute of Environmental Science and Engineering Research, Central South University of Forestry & Technology;
关键词：
modifi ed diatomite;;manganese oxide;;adsorption time;;Pb2+;;simulation wastewater
摘  要：
Pb2+ simulation wastewater was treated by employing diatomite modified with the manganese oxide. The effects of use amount of modifi ed diatomite, adsorption time, pollutant concentrations and pH value in wastewater on adsorption effi ciency of Pb2+ with modifi ed diatomaceous earth were investigated. And the adsorption isotherm and adsorption kinetics mechanism of the modifi ed diatomite were studied. The results show that adsorption quantity of modif ied diatomite to Pb2+ enlarged with the decrease of diatomite dose and the increase of Pb2+ initial concentration, pH and trial time; Adsorption isotherms of modified diatomite to Pb2+ were in complete accord with that drawn with Langmuir model; Adsorption kinetics models of modifi ed diatomite to Pb2+ f itted with the twoconstant diffusion equation very well.

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