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OTAC改性沸石对废水中Cr(VI)的吸附特性研究

Xiaoqing WU,Wen CHEN,Hua ZHANG,Honghu ZENG,Yanqin LU, Runqian ZHANG

Industrial Safety and Environmental Protection（2018）

Cited 0|Views4
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Abstract
采用化学沉淀法用十八烷基三甲基氯化铵(OTAC)改性天然沸石,研究了改性沸石(O-Z)对废水中Cr(VI)的吸附特性.O-Z表征结果显示:改性后其表面粗糙程度、孔隙度和比表面积均增大.吸附实验结果显示:在T=25℃、Cr(VI)初始质量浓度20 mg/L、O-Z投加量0.1 g、吸附时间12 h、pH=2时,O-Z对Cr(VI)吸附量达到3.22 mg/g;O-Z对Cr(VI)的吸附数据与准二级动力学模型的线性相关性显著;与Langmuir等温方程拟合良好,说明该吸附是单分子层吸附;热力学分析反映吸附过程是自发的、吸热反应.
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