酸改性膨润土处理含Cu^(2+)废水实验研究

Experimental Research on Treatment of Cu^(2+)-contained Wastewater by Acid-modified Bentonite

用硫酸对天然膨润土进行活化改性制得酸改性膨润土 ,研究了该土处理含Cu2 + 废水的适当条件。结果表明 :Cu2 + 初始浓度为13 .6mg/L时 ,用土量为 8g/L、pH =7、振速 15 0～ 160r/min、吸附时间 3 0min ,酸改性膨润土对Cu2 + 的去除率可达 99.9%。处理后Cu2 +

Natural bentonite was modified with sulfuric acid in this paper.Then the suitable condition of removing Cu 2+ by acidity modified bentonite was mainly studied. The results show that when the initial concentration of Cu 2+ is 13.6mg/L,the removal ratio of Cu 2+ by acidity modified bentonite can reach greater than 99% under the following conditions:the dosage of acidity modified bentonite is 8g/L,pH is 7,the vibration velocity is 150～160r/min, the adsorption time is 30min. The residual concentration of Cu 2+ is less than the first national effluent concentration limit after the treatment by acidity modified bentonite.