桂林理工大学学报2017，Vol.37Issue(1)：163-169,7.DOI:10.3969/j.issn.1674-9057.2017.01.024
锰氧化物改性硅藻土对水中As(Ⅴ)的吸附性能
Adsorption of As (Ⅴ) from aqueous solutions on Mn-oxide modified diatomite
摘要
Abstract
Modified diatomite was prepared by Mn-oxide based on pure diatomite.The modified diatomite was characterized by SEM,XRD and FT-IR.The effect of Mn-oxide modified diatomite adsorbent dose,pH,initial concentration of As5+ ion,reaction temperature and reaction time were discussed in static adsorption experiments.Results show that the removal efficiency is 98.5％ at adsorbent =5 g/L,pH =2,and initial concentration of As5 + ion =2 mg/L.The concentration of As5 + in adsorbed water is less than 30 ug/L,it is lower than the demand of ＜ Integrated wastewater discharge standard ＞ (GB 8978-1996).The adsorption isotherms and the kinetic data can best fit the Langmuir model and pseudo-second order kinetics,respectively.关键词
锰氧化物/改性硅藻土/吸附/废水/As(Ⅴ)Key words
Mn-oxide/modified diatomite/adsorption/waste water/As(Ⅴ)分类
资源环境引用本文复制引用
李皓,陈南春,解庆林,徐会,马丽丽,刘长淼,吴照洋..锰氧化物改性硅藻土对水中As(Ⅴ)的吸附性能[J].桂林理工大学学报,2017,37(1):163-169,7.基金项目
国家自然科学基金项目(41662005) （41662005）
中国地质调查局项目(12120113088200) （12120113088200）
广西科技攻关项目(桂科攻14124004-5-5 （）
桂科AB16380326) （）
广西矿冶与环境科学实验中心项目(KH2012ZD004) （KH2012ZD004）
广西高等学校高水平创新团队及卓越学者计划项目(002401013001) （002401013001）
桂林理工大学研究生创新项目(BS201602) （BS201602）
