| 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。 |
| 关键词: 污泥 形态 水溶性有机物 螯合能力 铜 锌 |
| DOI： |
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| 基金项目: |
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| Species of Water-Soluble Cu, Zn from Sewage Sludge and Cu-Binding Capacity with Water-Soluble Organic Matter |
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| Abstract: |
| Ion exchange resin methods were used to study species and charge characteristics of water soluble Cu, Zn from sewage sludge. The results indicated that 94% of water-soluble Cu from sewage sludge was in compldxion forms and negative charged. Zwitt ions were dominated species for Zn. 10.1% of water-soluble Zn were positive charged. Complexion capacity of Cu with water-soluble organic matter was higher than that of Zn. The results of gel filtration chromatography experiment showed that the wa ter-soluble organic matter fractions which Kav ranged from 0. 5 to 1. 15, representing small molecular wei tht fractions, had higher capacity than that of high molecular weight fractions, had higher capacity than that of high molecular weight fractions. UV spectrum characteristics of different fractions were also ana lyzed. |
| Key words: sewage sludge,Cu,Zn,forms,water-soluble organic matter,binding capacity |
