| As(Ⅲ)污染水源应急处理技术的中试研究 |
| 摘要点击 2062 全文点击 1908 投稿时间：2008-10-31 修订日期：2009-03-02 |
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| 中文关键词 突发性污染 应急处理 亚砷酸盐 强化混凝 预氧化 |
| 英文关键词 sudden pollution emergent treatment As(Ⅲ) enhanced coagulation pre-oxidation |
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| 中文摘要 |
| 以我国目前广泛采用的常规净水工艺为基础，开展了水源突发性As(Ⅲ)污染的应急处理工艺中试研究,考察了不同的氧化剂种类、投加量、投加点和不同污染物浓度水平对应急处理工艺效果的影响以及As(Ⅲ)的去除机制.结果表明，当原水As(Ⅲ)为150 μg/L，常规处理工艺对As(Ⅲ)的去除率仅为71.85%，其中溶解态的砷和总砷在快速混合、一级絮凝、二絮凝、沉淀、过滤各单元去除率分别为36.00%、5.42%、9.30%、14.95%、7.88%以及9.10%、-3.62%、2.74%、55.12%、8.51%，无法 |
| 英文摘要 |
| Based on the conventional water treatment processes widely used in China, a pilot scale study was performed to investigate emergent treatment for arsenite pollution in water source. The results show that As removal efficiency can only reach to 71.85% by conventional water treatment process. The removal efficiencies of dissolved arsenic and total arsenic by mixing, first flocculation, second flocculation, sedimentation, filtration units were 36.00%，5.42%，9.30%，14.95%，7.88% and 9.10%，-3.62%，2.74%，55.12%，8.51% respectively，when the concentration of As(Ⅲ) in raw water was 150 μg/L. The arsenic concentration in treated water can not be effectively controlled below 10 μg/L. Hence, the pre-oxidation is necessary. The pre-chlorination-enhanced coagulation process can effectively deal with the sudden As(Ⅲ) pollution. But for lower chlorine dosage, both ammonia concentration and different pre-chlorination sites have significant effects on arsenic removal, which should be taken into account. Potassium permanganate pre-oxidation-enhanced coagulation process can be more effectively deal with the sudden As(Ⅲ) pollution than pre-chlorination. Moreover the different pre-oxidation sites have no obvious effect on arsenic removal. As a result, potassium permanganate is recommended as an oxidant for As(Ⅲ). |
