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污水排放对泥砂吸附重金属离子的影响
蔡卫君1, 陈邦林1, 胡博路1, 李 莉1
华东师范大学化学系
摘要:
本文研究了上海市污水排放对长江口泥砂吸附重金属离子的影 响。结果表明,低pH时,泥砂表面有机物的弱酸基团解离度极小从而抑制了对Zn(Ⅱ)的吸附;高pH、高有机物浓度时,由于液相形成大量ZnL络合物而大 大抑制了泥砂对Zn(Ⅱ)的吸附,故有机物的存在在一定程度上减小了底质的重金属污染。
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基金项目:
THE EFFECT OF SEWAGE DISCHARGE ON THE ADSORPTIONOF HEAVY METAL IONS BY THE SMALL PARTICLESOF YANGTSE RIVER ESTUARINE
Abstract:
The present paper studies the effect of sewage discharge of Shanghai on the adsorption of heavy metal ions by small particles of Yangtse River estuarine. The results showed that the dissolved organics changed the properties of the solid surface of particles. In low pH range, the organics on the solid surface decreased the adsorption. In high pH range and high concentration of organics, the adsorption of Zn(II) by particles was decreased greatly because of the formation of ZnL complex in the liquid phase. So that the sewage discharge may decrease the heavy metal pollution in the sediments in some extent.
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