Plasticizers released from PVC microplastics in aquaculture environments:leaching behaviors and ecological implications  

作　　者：Lok Tung FUNG Mengyang LIU Keran YANG Yaru CAO Yifang CHEN Meng YAN M.Y.Kenneth LEUNG 

机构地区：[1]State Key Laboratory of Marine Pollution and Department of Chemistry,City University of Hong Kong,Hong Kong 999077,China [2]Research Centre for the Oceans and Human Health,City University of Hong Kong Shenzhen Research Institute,Shenzhen 518057,China [3]School of Energy and Environment,City University of Hong Kong,Hong Kong 999077,China

出　　处：《Journal of Oceanology and Limnology》2025年第2期633-643,共11页海洋湖沼学报(英文)

基　　金：Supported by the State Key Laboratory of Marine Pollution(SKLMP)in City University of Hong Kong,the Shenzhen Science and Technology Program(No.JCYJ20220530140813030 to Meng YAN);the Innovation and Technology Commission(ITC)of the Hong Kong SAR Government(No.9448002),which provides regular research funding support to SKLMP。

摘　　要：Contamination of microplastics(MPs)and their associated plastic additives in the marine environment is a global concern due to their widespread distribution and toxicity to aquatic life.Although polyvinyl chloride(PVC)materials are commonly used in aquaculture environments,the potential risks of PVC MPs and the release of their additives in aquatic environments and organisms remain largely unknown.In this study,we investigated the leaching behaviors of phthalate esters(PAEs),including the mass and composition of PAEs in PVC MPs and their leaching kinetics,and evaluated the environmental risks of using PVC canvas in aquaculture activities.It was found that diethyl phthalate(DEP)was the most dominant PAE compound leached from PVC MPs(44.70±7.87 ng/g),followed by dimethyl phthalate(DMP,24.40±1.56 ng/g).The Elovich model was applied to simulate the leaching kinetics,and the simulated curves showed similar logarithmic trends that PAEs rapidly migrated from MPs to the water column at first and followed by a gradual increase over time.The different leaching kinetics of PAEs can be explained by their chemical properties,such as water solubility,molecular weight,and octanol-water partition coefficient.Compounds with lower solubility showed higher leaching coefficients,which are the constants of different PAEs in Elovich equation.Considering the potential joint toxicity of PVC leachates and the importance of food security,it is recommended to use PVC products responsibly and manage plastic waste properly.

关 键 词：phthalate ester polyvinyl chloride ADDITIVE leaching kinetic 

分 类 号：TQ3[化学工程]