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| 摘要: |
| 对城市给水处理厂在不中断供水的情况下，运用现有的工艺流程，应对水源突发性铅污染进行了小试研究。试验结果显示：在所研究的混凝剂投加量范围内，PFS对Pb的去除效果明显优于PAC。原水的pH对于混凝除铅影响显著，而浑浊度对Pb的去除无明显影响。采用Ca（OH）2作为pH调节剂强化除铅效果明显优于NaOH，将原水的pH控制在9左右，可确保混凝沉淀出水的Pb浓度小于10μg/L，但需加酸对出水的pH进行回调。 |
| 关键词: 应急处理、除铅、强化混凝 |
| DOI： |
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| 基金项目: |
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| Study on Emergent Treatment for Lead Pollutionin Water Source |
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HU Jing
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| Abstract: |
| The bench scale testings are performed to investigate emergent treatment for lead pollution in water source using the existing process in drinking water treatment plant under the situation that do not break off water supply. The results show that: in the range of studied coagulant dosage, Pb removal efficiency by PFS is significantly better than that by PAC. The effect of pH on lead removal by coagulation is significant, but the turbidity is not. Using Ca (OH) 2 as a pH regulator to enhance the Pb removal is better than NaOH.As a result, adjusting pH of the raw water around 9 by adding Ca (OH) 2 can ensure the concentrations of Pb in effluent below 10 μ g / L, but acid is needed to make the finished water at neutral pH. The order of Pb removal efficiencies by three adsorbent were: natural diatomaceous earth> natural zeolite powder >powdered activated carbon. As the presence of lead in water is mainly particles state, both dissolved, natural diatomaceous earth with good adsorption, enhanced coagulation and filtration capacities has many advantages. |
| Key words: Emergent treatment Lead removal Enhanced coagulation |
