| 吴桐,黄雪,刘伟,刘大会,蔡建波,朱端卫.Fe2+/过氧化物体系氧化活性及其处理生活污水效果比较[J].农业环境科学学报,2019,38(1):193-200. |
| Fe2+/过氧化物体系氧化活性及其处理生活污水效果比较 |
| Comparisons of oxidation activity in the Fe2+/peroxide system applied to domestic sewage treatment processes |
| 投稿时间：2018-04-08 |
| DOI：10.11654/jaes.2018-0456 |
| 中文关键词: Fe2+ 过氧化物 COD 氧化能力 絮凝作用 |
| 英文关键词: Fe2+ peroxides COD oxidation ability flocculation |
| 基金项目:国家滇池水体污染控制与治理科技重大专项课题（2012ZX07102-003-03）；山东省自然科学基金项目（ZR2016YL006） |
| 作者 | 单位 | E-mail | | 吴桐 | 华中农业大学资源与环境学院生态与环境工程研究室, 武汉 430070 | | | 黄雪 | 华中农业大学资源与环境学院生态与环境工程研究室, 武汉 430070 | | | 刘伟 | 齐鲁工业大学(山东省科学院), 山东省分析测试中心, 山东省中药质量控制技术重点实验室, 济南 250014 | | | 刘大会 | 湖北中医药大学药学院, 武汉 430065 | | | 蔡建波 | 华中农业大学资源与环境学院生态与环境工程研究室, 武汉 430070
湖北省生猪健康养殖协同创新中心, 武汉 430070 | | | 朱端卫 | 华中农业大学资源与环境学院生态与环境工程研究室, 武汉 430070
湖北省生猪健康养殖协同创新中心, 武汉 430070 | zhudw@mail.hzau.edu.cn |
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| 中文摘要: |
| 为了加快对分散性生活污水的有效治理，利用过氧化钙、过氧化镁及过氧化锌与Fe2+形成不同类芬顿体系，通过亚甲基蓝溶液在被氧化过程中的色度变化，考察了体系的氧化能力，在此基础上比较了体系对于生活污水中COD的去除效果。结果表明，在Fe2+/过氧化物为1：2的最佳摩尔比下，pH越低，Fe2+/过氧化物的氧化能力越强；同时，过氧化物氧化亚甲基蓝过程可用一级反应动力学模型来拟合，比较过氧化钙、过氧化镁和过氧化锌，Fe2+/CaO2体系的氧化反应速率最大，其速率常数k可达2.55 min-1。用修正的Gompertz模型拟合表明，3种过氧化物在生活污水中释氧速率也是Fe2+/CaO2体系最快。摩尔比为1：2的Fe2+/过氧化物体系在污水初始pH为3时，CaO2对污水COD的去除效果最好，COD的去除率达到74.9%；随着溶液pH的提高，MgO2、ZnO2对COD的作用受pH影响比CaO2更明显；Fe2+/过氧化物体系在自然酸度条件下对COD的去除表现为Fe2+的絮凝作用为主，当初始酸度调节至pH=5时，这一体系对COD的氧化作用明显加强。通过对Fe2+/过氧化物类芬顿体系作用与性能之比较，明确了Fe2+/CaO2更适合用于生活污水中COD的去除。 |
| 英文摘要: |
| Peroxides, such as calcium peroxide, magnesium peroxide, and zinc peroxide, have been used as chemical reagents of the Fenton-like system. In this study, the oxidation ability of these compounds with Fe2+ was investigated by monitoring the color change of methylene blue in solutions, with a focus on the removal efficiency of the chemical oxygen demand(COD) in domestic sewage. Under the optimum molar ratio of Fe2+ to peroxides, 1:2, the highest oxidation ability was reached and simulated with the first order kinetic equation. Comparing Fe2+/MgO2, Fe2+/ZnO2, and Fe2+/CaO2, the reaction rate of the Fe2+/CaO2-methylene blue system was the highest, with a constant rate of 2.55 min-1. Moreover, the fitting of the modified Gompertz model showed that the rate of oxygen release of Fe2+/CaO2 among the three kinds of peroxides was also the highest. As a consequence, COD removal in domestic sewage by using Fe2+/peroxides with a molar ratio of 1:2 showed a maximum removal efficiency for COD, especially for wastewater at pH 3, where the removal rate of COD approached 74.9%. With increasing pH(>3.0), the removal of COD by MgO2 or ZnO2 was mainly affected by the pH of the domestic sewage. For the natural acidity, the removal of COD by Fe2+/peroxide systems was mainly caused by the flocculation of Fe2+, and the oxidation ability of the system would be much stronger when the initial pH was adjusted to 5.0. |
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