Optimization of Sample Pretreatment based on Graphene Oxide Dispersed Acid Silica Gel for Determination of Polybrominated Diphenyl Ethers in Vegetables near an E-waste Recycling Plant
Polybrominated diphenyl ethers (PBDEs) derived from e-waste dismantling, tend to easily bioaccumulate in vegetables. In this study, an optimized sample pretreatment method based on graphene oxide (GO) dispersed acid silica gel was used to determine PBDEs levels in vegetables. The recovery efficiency of the optimized method ranged between 90.3%–107.5% with the detection limit (LOD) being within 0.17–1.8 ng g−1. Vegetable samples were grown nearby an e-waste recycling plant in Nanjing, China, and analyzed using the optimized method. The concentrations of ΣPBDEs in the samples ranged from 12.1 to 20.1 ng g−1. This study developed an optimized sample pretreatment method to determine PBDEs in vegetables nearby e-waste contaminated sites and provides insights on the potential risks derived from e-waste dismantling to the surrounding environment.
KeywordsElectronic waste Polybrominated diphenyl ethers Solid phase extraction Graphene oxide Vegetable
This study was financially supported by the National Science and Technology Major Project of China (2016YFD0800204), the Outstanding Youth Fund of Natural Science Foundation of Jiangsu, China (BK20150050), the Innovative Project of the Chinese Academy of Sciences (ISSASIP1616), the National Natural Science Foundation of China (21677149) and Key Program of Frontier Sciences, Chinese Academy of Sciences (QYZDJ-SSW-DQC035).
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