催化氧化除氨氮/锰滤料活性恢复方式优化研究

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Abstract Taking deactivated filter media as the research object, the effects of three different recovery methods (natural recovery, adding basicity, and re-hanging film) on the catalytic oxidation efficiency of the filter media for ammonium (NH₄⁺-N) and manganese (Mn²⁺) removal were investigated. The experimental results showed that the NH₄⁺-N removal rate of natural recovery (1#) filter column, adding basicity (2#) filter column and re-hanging film (3#) filter column was above 90% after running for 4d, 2d and 3d, respectively. When the influent NH₄⁺-N concentration increased gradually, the effluent NH₄⁺-N concentration of 3# filter column fluctuated the most, while the effluent nitrite accumulation time of 1# filter column was the longest and the peak value was the highest. The recovery rate of Mn²⁺ removal activity of all three filter columns was fast. Both 1# and 2# filter columns could completely remove Mn²⁺ in 2 days and 3# filter column could completely remove the influent Mn²⁺ within 5days after stopping adding potassium permanganate. The experimental results of the interaction between NH₄⁺-N and Mn²⁺ showed that 2# filter column performed the best among the three filter columns. Although NH₄⁺-N inhibited the removal of Mn²⁺, with the increase of influent NH₄⁺-N concentration, the effluent Mn²⁺ concentration of the 2# filter column was always lower than 0.1mg/L. Mn²⁺ had no significant effect on NH₄⁺-N removal. The results of XRD analysis showed that the crystallinity of the filter media samples in 3# filter column was poor due to the influence of the new formed oxide film on its surface. Considering the recovery efficiency of NH₄⁺-N and Mn²⁺ as well as the addition of chemical agents, the natural recovery method is the most suitable recovery method.

Key words： activity recovery deactivated filter media ammonium/manganese removal catalytic oxidation groundwater treatment

Received: 22 September 2021

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X523

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	CHENG Ya
	ZHANG Yong-zhi
	ZHENG Jia-hui
	LI Yu-yang
	HUANG Ting-lin

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CHENG Ya,ZHANG Yong-zhi,ZHENG Jia-hui等. Optimization of recovery method for catalytic ammonium/manganese oxidation by active filter media[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(5): 2112-2119.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I5/2112

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