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OALib Journal期刊
ISSN: 2333-9721
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腐殖酸改性及其对镉的吸附特性
DOI: 10.3969/j.issn.1000-2006.2014.04.019, PP. 102-106
Keywords: 腐殖酸改性,吸附特性,镉,重金属废水
Abstract:
对腐殖酸改性前后表面理化性质的改变及其对水中镉离子的吸附性能进行了研究。结果表明,改性后腐殖酸比表面积和孔结构均有明显改善,吸附能力增强。吸附实验结果表明:随着ph的增大,改性后腐殖酸对镉离子的吸附量增加,在ph约为6时,吸附效率达到最大并趋于稳定;改性后腐殖酸对镉离子的吸附最高可达20mg/g,吸附等温线用langmuir模型拟合最佳。吸附再生实验表明,改性腐殖酸吸附剂具有不易损失、易再生的特点,可以循环使用。
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