污泥中水溶性Cu,Zn的形态及水溶性有机物与Cu2+的复合特性

被引:4
作者
李香真
机构
[1] 中国农业大学土壤和水科学系!北京
关键词
污泥; Cu; Zn; 形态; 水溶性有机物; 螯合能力;
D O I
暂无
中图分类号
X13 [环境化学];
学科分类号
摘要
用离子交换树脂法研究了污泥中水溶性重金属高于Cu,Zn的存在形态和电荷特点。结果表明:水溶性Cu中约94%是以带负电行的螯合物存在;Zn则多以带两性电荷的螯合物存在,带正电荷的离子约占10%;Cu2+与有机物的络合能力强于Zn。凝胶渗滤色谱实验表明,选择系数(Kav)在0.5~1.15之间的小分子量有机物组分与Cu2+的螯合能力较强。对污泥水溶性有机物不同组分的紫外光谱特性进行了分析。
引用
收藏
页码:113 / 117
页数:5
相关论文
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