期刊
WATER
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/w12030865
关键词
balance; constructed wetlands; full scale; phthalate acid esters
资金
- Natural Science Foundation of Beijing [Z170004]
- National Natural Science Foundation of China [51509003]
- Beijing Municipal Science and Technology Commission [D161100000216001]
When used as highly produced chemicals and widely used plasticizers, Phthalate acid esters (PAEs) have potential risks to human life and the environment. In this study, to assess the distribution and fate of PAEs, specifically inside a full-scale horizontal subsurface flow constructed wetland, four PAEs including dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), and bis (2-ethylhexyl) phthalate (DEHP) were investigated. In effluent, PAEs concentration decreased 19.32% (DMP), 19.18% (DEP), 19.40% (DBP), and 48.56% (DEHP), respectively. Within the wetland, PAEs partitioned in water (0.18-1.12 mu g/L, 35.38-64.92%), soil (0.44-5.08 mu g/g, 1.02-31.33%), plant (0.68-48.6 mu g/g, 0.85-36.54%), air and biological transformation (2.72-33.21%). The results indicated that soil and plant adsorption contributed to the majority of PAE removal, digesting DMP (19.32%), DEP (19.18%), DBP (19.40%), and DEHP (48.56%) in constructed wetlands. Moreover, the adsorption was affected by both octanol/water partition coefficient (K-ow) and transpiration stream concentration factors (TSCF). This work, for the first time, revealed the partition and fate of PAEs in constructed wetlands to the best of our knowledge.
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