邻苯二甲酸盐
中国
邻苯二甲酸二乙酯
邻苯二甲酸二甲酯
环境科学
挥发
邻苯二甲酸二丁酯
塑料薄膜
环境化学
污染
增塑剂
废物管理
邻苯二甲酸
危险系数
污染物
温室
土壤水分
杀虫剂
污染
环境工程
毒理
化学
农学
生物
有机化学
作者
Yu-Tong Li,Jun Wang,Shan Yang,Sheng Zhang
出处
期刊:Chemosphere
[Elsevier]
日期:2021-04-01
卷期号:268: 128821-128821
被引量:14
标识
DOI:10.1016/j.chemosphere.2020.128821
摘要
The residue of phthalate acid esters (PAEs) in plastic film greenhouses had become a global concern environmental pollution problem. However, few studies have focused on the occurrence and fate of PAEs in the soil-air interface of the greenhouses. In this study, the occurrence, health risks, and soil-air exchange of PAEs from ten soil samples and four air samples of different greenhouses were investigated by a case study. The concentrations of total PAEs and individual PAEs congeners between two seasons were significantly different in the greenhouse soil and atmosphere. Di-(2-ethylhexyl) phthalate (1.04 mg kg −1 ) and diisobutyl phthalate (0.16 mg kg −1 ) were the predominant PAE congeners of soil in spring and autumn, respectively. Di-(2-ethylhexyl) phthalate was the major PAE congeners in the greenhouse atmosphere both of spring (0.03 μg m −3 ) and autumn (1.32 μg m −3 ). Health risks assessment showed that the predominant exposure route for adults was dietary intake, and the total carcinogenic risk level of PAEs was acceptable. Besides, fugacity model analysis indicated that di-(2-ethylhexyl) phthalate tended to deposit from air to soil with mean deposition flux of 175.1 kg (h⋅km 2 ) −1 in autumn and 11.9 kg (h⋅km 2 ) −1 in spring. On the contrary, diethyl phthalate escaped from soil with mean volatilization flux of 0.005 kg (h⋅km 2 ) −1 in autumn and 0.025 kg (h⋅km 2 ) −1 in spring. Other PAE congeners have tried to establish an equilibrium status through recycling continuously between the soil and air, and the source-sink relationships depended on their concentrations and hydrophobicity. This study showed that the distribution and movement of PAEs in the soil-air interface might be principally caused by temperature and their chemical properties. • DEHP were the major PAEs in soil and air of the plastic greenhouses. • Seasonal variation had further impact on the occurrence of PAEs in soil and air. • Soil has become a sink of DEHP, whereas a source of DEP. • Seasonal variation occurred in soil - air exchange for mid molecular weight PAEs.
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