Air-Soil Exchange of Organochlorine Pesticides in a Traditionally Agricultural Region in China: Base on the Bark/Air Partitioning Model
Shanshan Wang 1,2,3,4
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Anhui Provincial Engineering Laboratory of Water and Soil Pollution Control and Remediation, School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui, 241002, PR China
Wuhu Dongyuan New Country Developing Co., Ltd., Wuhu, Anhui, 241000, PR China
Center of Cooperative Innovation for Recovery and Reconstruction of Degraded Ecosystem in Wanjiang City Belt, Wuhu, Anhui, 241002, PR China
CAS Key Laboratory of Crust-Mantle Materials and Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
Submission date: 2023-05-24
Final revision date: 2023-11-21
Acceptance date: 2023-12-09
Online publication date: 2024-04-09
Publication date: 2024-04-18
Corresponding author
Xiaoguo Wu   

Anhui Normal University, College of Environmental Science and Engineering, , 241002, Wuhu, China
Pol. J. Environ. Stud. 2024;33(4):3917-3926
Willow barks were collected for OCP analyses in the middle reach of the Huaihe River (MRHR), China. ΣOCPs in the tree barks were 16.00-50.35 ng g-1 (mean: 27.60±7.48 ng g-1, dry weight). HCHs were the dominant OCPs in the bark samples. The historical usage of technical HCH and DDT considerably impacted the HCHs and DDTs in the barks. Heptachlor, Aldrin, Isodrin, etc., have never been used in China, but they were frequently detected in the barks, indicating their unknown usage or atmospheric transportation from other source regions. Volumetric air concentrations of OCPs were estimated using a model for bark/air partitioning. Calculated air concentrations of ΣDDTs and ΣHCHs were 0.16±0.04 and 10.38±4.13 ng m-3, respectively. The results of air-soil exchange were: HCB, HCHs, and Heptachlor presented net volatilization; DDTs preferred net deposition; Endosulfan-I and Endosulfan-II might be in equilibrium or presented a weak trend of deposition; and Aldrin was in equilibrium.
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