期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 87, 期 -, 页码 349-360出版社
SCIENCE PRESS
DOI: 10.1016/j.jes.2019.07.021
关键词
Low-density polyethylene (LDPE); PAHs; Substituted PAHs (SPAHs); Freely dissolved concentrations; Passive sampling
资金
- National Natural Science Foundation of China [41877471, 41676095]
- China Postdoctoral Science Foundation, China [2017M622782]
- Open Foundation of Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), Chinese Academy of Sciences, China [LMB20191004]
- Science and Technology Innovation Commission of Shenzhen, China [JCYJ20180507182227257]
Low-density polyethylene (LDPE) has been widely used as a sorbent for passive sampling of hydrophobic organic contaminants (HOCs) in aquatic environments. However, it has seen only limited application in passive sampling for measurement of freely dissolved concentrations of parent and substituted PAHs (SPAHs), which are known to be toxic, mutagenic and carcinogenic. Here, the 16 priority PAHs and some typical PAHs were selected as target compounds and were simultaneously determined by gas chromatography-mass spectrometer (GC-MS). Some batch experiments were conducted in the laboratory to explore the adsorption kinetics of the target compounds in LDPE membranes. The results showed that both PAHs and SPAHs could reach equilibrium status within 19-38 days in sorption kinetic experiments. The coefficients of partitioning between LDPE film (50 mu m thickness) and water (K-LDPE) for the 16 priority PAHs were in good agreement with previously reported values, and the values of K-LDPE for the 9 SPAHs are reported in this study for the first time. Significant linear relationships were observed, i.e., log K-LDPE = 0.705 x log K-OW + 1.534 for PAHs (R-2 = 0.8361, p < 0.001) and log K-LDPE = 0.458 x log K-OW + 3.092 for SPAHs (R-2 = 0.5609, p = 0.0077). The selected LDPE film was also proven to meet the condition of zero sink for the selected target compounds. These results could provide basic support for the configuration and in situ application of passive samplers. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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