酸法改性煤渣吸附Cr(VI)的性能研究

被引:2
作者
余美琼
杨金杯
陈文韬
黄建斌
机构
[1] 福建师范大学福清分校生物与化学工程系
关键词
煤渣; 改性煤渣; 吸附; Cr(VI); 等温线;
D O I
10.13367/j.cnki.sdgc.2012.05.012
中图分类号
X703.1 [技术方法];
学科分类号
083002 ;
摘要
利用盐酸对蜂窝煤渣进行改性,通过粉末X射线衍射光谱(XRD)对改性前后蜂窝煤渣的物质组成进行表征,研究了改性蜂窝煤渣对模拟含铬废水中Cr(VI)的吸附性能.改性蜂窝煤渣对Cr(VI)具有良好的吸附能力,吸附过程符合二级吸附动力学模型.分别用Langmuir和Freundlich吸附等温线模型对实验数据进行拟合,结果表明,吸附过程更符合Freundlich模型,20℃、30℃、40℃下的1/n值分别为0.397、0.2992和0.1925.吸附热力学研究表明,改性蜂窝煤渣对Cr(VI)的吸附是一个自发的吸热过程.
引用
收藏
页码:4 / 8
页数:5
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