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Chemosphere

Title:		The fate of three typical persistent organic pollutants in bioretention columns as revealed by stable carbon isotopes
Author(s):		Duan X; Li J; Li Y;
Address:		"State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China. Electronic address: xaut_ljk@163.com"
Journal Title:		Chemosphere
Year:		2023
Volume:		20230519
Issue:
Page Number:		138996 -
DOI:		10.1016/j.chemosphere.2023.138996
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"There is a lack of simple and effective methods to quantify the fate processes of persistent organic pollutants (POPs) in bioretention systems. In this study, the fate and elimination processes of three typical (13)C-labeled POPs in regularly added bioretention columns were quantified using stable carbon isotope analysis techniques. The results showed that the modified media bioretention column removed more than 90% of Pyrene, PCB169 and p,p'-DDT. Media adsorption was the dominant removal mechanism for the reduction of the three exogenous organic compounds (59.1-71.8% of the input) although plant uptake (5.9-18.0%) was also important. Mineralization was effective in degrading pyrene (13.1%) but had a very limited effect on p,p'-DDT and PCB169 removal (<2.0%), the reason for which may be related to the aerobic conditions of the filter column. Volatilization was relatively weak and negligible (<1.5%). The presence of heavy metals inhibited the removal of POPs to some extent: media adsorption, mineralization and plant uptake were reduced by 4.3-6.4%, 1.8-8.3% and 1.5-3.6% respectively. This study suggests that bioretention systems are an effective measure for the sustainable removal of POPs from stormwater and that heavy metals can inhibit the overall performance of the system. Stable carbon isotope analysis techniques can help to investigate the migration and transformation of POPs in bioretention systems"
Keywords:		"Persistent Organic Pollutants Carbon Isotopes Ddt *Metals, Heavy Carbon *Environmental Pollutants Plants Rain Nitrogen Bioretention Carbon isotope Heavy metals;"
Notes:		"MedlineDuan, Xiaolong Li, Jiake Li, Yuxing eng England 2023/05/22 Chemosphere. 2023 Sep; 334:138996. doi: 10.1016/j.chemosphere.2023.138996. Epub 2023 May 19"