复合垂直流人工湿地对有机磷阻燃剂的净化

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Abstract It is urgent to explore the efficient treatment methods to purify organophosphorus flame retardant (OPFRs) wastewater. integrated vertical-flow constructed wetlands (IVCWs) was built, the influence of varied operating conditions of inlet water, C/N ratio and aeration on the removal efficiency of TCPP was investigated, and the migration behaviors of TCPP in each medium of the wetland system was observed to gain insights into the relevant mechanism. The results showed that there were significant differences in the removal of TCPP among different operating conditions. Compared with the removal rate of TCPP (52.28%±11.64%) when the inlet water C/N=3, increasing C/N ratio, aeration value and the two factors combined can increase the removal rate to (68.77%±2.49%), (57.21%±1.76%) and (89.64%±1.94%). By analyzing the cumulative amount of each phase in the system, it was found that the accumulation of TCPP in plants (0.09%) and substrate (3.30%) was limited. The concentration of TCPP in igneous rock (162.39~435.01ng/g dw) and zeolite (131.67~407.74ng/g dw) was significantly higher than that in soil (32.63~149.94ng/g dw). In plants, compared with Acorus calamus (432.95ng/g dw) and Typhae latifolia(665.21ng/g dw), Cyperus alternifolius(1288.82ng/g dw) was more likely to accumulate TCPP. TCPP was mainly concentrated in the roots of different plants and tends to transfer to leaves. Exploring the removal potential and migration behavior of IVCWs for TCPP has positive significance to mitigate OPFRs pollution.

Key words： integrated vertical-flow constructed wetland organophosphorus flame retardants removal migration behavior

Received: 24 December 2019

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X703

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	Articles by authors
	GAO Yu-shan
	WANG Huan-hua
	XU Shi-rong
	LU Shao-yong
	LIU Tao
	QIN Pan

Cite this article:

GAO Yu-shan,WANG Huan-hua,XU Shi-rong等. Study on purification of organophosphorus flame retardants by integrated vertical-flow constructed wetlands[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(7): 3003-3009.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I7/3003

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