大连工业大学学报2018，Vol.37Issue(2)：100-104,5.DOI:10.19670/j.cnki.dlgydxxb.2018.0205
改性玉米秸秆对铜离子的吸附性能
Adsorption ability of modified corn straw for Cu2+
摘要
Abstract
In order to improve adsorption ability of corn straw for heavy metals,corn straw-based adsorbent was prepared via modification by citric acid with sodium hypophosphite as catalyst.The chemical and micro-structures of modified corn straw were analyzed by fourier transform infrared spectroscopy(FT-IR)and scanning electron microscope(SEM).The effects of pH of solution,initial concentration of Cu2+,adsorption temperature and time on the adsorption ability of adsorbent for Cu2+were investigated.The results showed that the optimum adsorption conditions were 30 mg/L initial concentration of Cu2+,adsorbent dosage of 1.0 g/L,pH 5.5 of solution,25 ℃ and adsorption time of 30 min.The maximum adsorption ability of modified corn straw for Cu2+was up to 26.5 mg/g,which was 1.9 times higher than that of unmodified corn straw.The removal effciency of Cu2+was high up to 89%.The adsorption kinetics of Cu2+onto modified corn straw could be well described by pseudo-second-order model.关键词
玉米秸秆/柠檬酸/重金属离子/吸附性能Key words
corn straw/citric acid/heavy metal ions/adsorption ability分类
化学化工引用本文复制引用
刘晓东,李沅,熊杰,孙岩峰,谭凤芝..改性玉米秸秆对铜离子的吸附性能[J].大连工业大学学报,2018,37(2):100-104,5.基金项目
辽宁省海洋与渔业厅科技项目(201405) （201405）
大连市科技计划项目(2015B11NC078). （2015B11NC078）
