森林工程2018，Vol.34Issue(1)：65-70,6.
玉米芯改性吸附剂对水中Cr(Ⅵ)的吸附性能研究
Adsorption Characteristics of Chromium(Ⅵ) by Modified Corncob
摘要
Abstract
High concentration of Cr (Ⅵ) has become the main source of pollution in the ecological environment .To find a cheap and efficient treatment method for Chromium (Ⅵ) , the corncob was modified with phosphoric acid and the adsorption performance was investigated considering the factors of pH , dosage, contacting time and initial mass concentration , and the adsorption performance was compared before and after the modification .The results indicated that Chromium (Ⅵ) removal rate increased at low pH and modified corncob had the best performance in Chromium (Ⅵ) adsorption with removal rate of 89.6％ at pH 1.The adsorption performance en-hanced obviously with the dosage increased .The adsorption process achieved equilibrium in 80 min and the adsorption kinetics was better fitted to pseudo-second-order model .Freundlich and Langmuir model were implemented to express the adsorption mechanism by modified corncob , and the correlation coefficient reached 0.999.Other things being equal , with dosage of 20 g/L to 10 mg/L Chromi-um(Ⅵ) solution, the modification enhanced removal rate of 22.8％, indicating the adsorption performance of Chromium (Ⅵ) by modified corncob improved greatly .关键词
改性玉米芯/Cr(Ⅵ)/磷酸/吸附Key words
Modified corncob/chromium(Ⅵ)/phosphoric acid/adsorption分类
资源环境引用本文复制引用
王玥,秦帆,唐燕华,陈治,黄亚楠,荆肇乾..玉米芯改性吸附剂对水中Cr(Ⅵ)的吸附性能研究[J].森林工程,2018,34(1):65-70,6.基金项目
国家科技支撑计划项目(2015BAL02B04) （2015BAL02B04）
住房和城乡建设部科学技术项目(2015-K7-012) （2015-K7-012）
南京林业大学大学生创新创业训练计划项目(2017NFUSPITP181) （2017NFUSPITP181）
