水中有机物对紫外光催化还原溴酸盐的影响

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Abstract TiO₂ and TiOF₂ were prepared by a one-step hydrothermal method and their efficiencies of BrO₃⁻ reduction under UV photocatalysis were investigated in water matrix. In pure water, 78.5% of BrO₃⁻ was reduced by UV/TiO₂ after 120min, which was significantly higher than that on UV/TiOF₂ (57.0%). While in water contained refractory organic pollutant (atrazine, ATZ) or natural organic matter (humic acid, HA), the results were opposite to those in pure water. UV/TiOF₂ achieved superior simultaneous ATZ degradation and BrO₃⁻ reduction when refractory organic pollutant co-existed with BrO₃⁻. The ATZ degradation and BrO₃⁻ reduction rates reached 48.5% and 99.0% after 120min when 20 μmol/L ATZ and 20μmol/L BrO₃⁻ co-existed in the solution. The BrO₃⁻ reduction efficiencies of UV/TiO₂ and UV/TiOF₂were 13.8% and 29.8% when 5mg/L of HA was added into the solution, demonstrating that compared with UV/TiO₂, UV/TiOF₂ revealed robust BrO₃⁻ reduction ability in the complex water constituents. TiOF₂ presented stronger resistance to water matrix applied in UV photocatalytic advanced water purification system.

Key words： UV photocatalysis bromate control TiOF₂ refractory organic pollutant natural organic matter

Received: 05 August 2021

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X703.5

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	Articles by authors
	HU Hang-kai
	XU Hao-dan
	LU Xiao-hui
	WANG Li-zhang
	MA Jun
	SONG Shuang
	WANG Da

Cite this article:

HU Hang-kai,XU Hao-dan,LU Xiao-hui等. Influencing of aquatic organic matters on UV photocatalytic reduction efficiency of bromate[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(3): 1164-1172.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I3/1164

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