氯消毒中有机防晒剂BP9的去除转化与风险评价

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Abstract The issue of new disinfection by-products in drinking water is attracting increasing concern.Chlorination of a typical UV-filter benzophenone-9(BP9) was studied.The effect of initial BP9 concentration,initial residual chlorine,pH value,and ammonia nitrogen concentration on the reaction were also investigated.The degradation mechanism and the ecological risk were further discussed.The results indicated that,BP9 removal could reach 91.3% in 90s under the conditions of initial BP9 concentration 5mg/L,initial residual chlorine 5mg/L.BP9 chlorination process obeyed the pseudo-first-order kinetics.The degradation rate decreased with the increase of initial BP9 concentration and ammonia nitrogen concentration,while increased with the increase of initial residual chlorine.Neutral conditions are favorable for BP9 chlorination.Seven intermediates were identified by HPLC-MS/MS and GC-MS,and possible degradation pathways were also proposed.Luminescent bacteria experiment and ECOSAR prediction both showed that intermediates produced in BP9 chlorination have higher toxicity than the parent compound,which pose a potential risk to drinking water safety.

Key words： benzophenone-9(BP9) chlorination influencing factors degradation mechanism risk assessment

Received: 15 August 2017

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	Articles by authors
	LI Jia-qi
	DU Er-deng
	FAN Xin-xin
	YANG Yun-yi
	WANG Li-ping

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LI Jia-qi,DU Er-deng,FAN Xin-xin等. Removal, transformation and risk assessment of UV-filter BP9 during chlorination disinfection[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(3): 968-976.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I3/968

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