零价铁在污水脱氮除磷方面的研究进展

doi:10.11894/1005-829x.2016.36(12).005

摘要/Abstract

摘要：

对零价铁的脱氮除磷机理、影响因素，以及与生物法、现有污水处理工艺结合等方面的研究进行了综述。零价铁脱氮的主要作用机理是表面吸附和氧化还原反应，除磷的主要机理是零价铁的表面吸附作用、Fe²⁺对磷酸根的化学沉淀作用及铁氢氧化物与磷酸根的共沉淀作用。影响脱氮除磷的主要因素有混合强度、酸度、零价铁浓度、初始硝氮（磷）浓度等。零价铁对微生物的除氮除磷过程有协同促进作用，不仅能提高去除速率和效率，并且能够促进产物转化为无害物质。零价铁与现有传统污水处理方式结合在污水处理领域具有广阔前景，这也是未来零价铁应用在污水处理领域的发展方向。

关键词: 零价铁, 脱氮, 除磷, 污水处理

Abstract:

The research progress in zero valent iron applied to the aspects of the mechanisms of denitrification and dephosphorization,influencing factors,as well as the combination of biological methods,present wastewater treatment processes,etc. are summarized. Adsorption and redox reaction is the main mechanism of denitrification,while surface adsorption of zero valent iron,the chemical precipitation of phosphate radicals by Fe²⁺ and the co-precipitation of iron hydroxide and phosphate are the main mechanisms of dephosphorization. The main factors affecting dinitri-fication and dephosphorization are mixing intensity,acidity,zero valent iron concentration,initial nitrate (phosphorus) concentration,etc. Zero-valent iron has synergistic and stimulative effects on micro-organism denitri-fication and dephosphorization processes,which can not only improve removing rates and efficiencies,but also stimulate the products to convert into harmless materials. Combining zero valent iron with the present traditional wastewater treatment modes in water treatment fields has wide prospect. This is also the development direction of zero valent iron applied to wastewater treatment fields in the future.

Key words: zero-valent iron, denitrification, dephosphorization, wastewater treatment

中图分类号:

X703

张怡萍, 赵泉林, 崔立莉, 叶正芳. 零价铁在污水脱氮除磷方面的研究进展[J]. 工业水处理, 2016, 36(12): 22-26.

Zhang Yiping, Zhao Quanlin, Cui Lili, Ye Zhengfang. Research progress in zero-valent iron(ZVI) applied to wastewater denitification and dephosphorization[J]. INDUSTRIAL WATER TREATMENT, 2016, 36(12): 22-26.

https://www.iwt.cn/CN/Y2016/V36/I12/22

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