PMID- 38251039 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240129 IS - 2305-6304 (Electronic) IS - 2305-6304 (Linking) VI - 12 IP - 1 DP - 2024 Jan 18 TI - Historical Occurrence and Composition of Novel Brominated Flame Retardants and Dechlorane Plus in Sediments from an Electronic Waste Recycling Site in South China. LID - 10.3390/toxics12010084 [doi] LID - 84 AB - Novel brominated flame retardants (NBFRs) and dechlorane plus (DP) have been widely used as alternatives to traditional BFRs. However, little is known about the temporal trends of NBFR and DP pollution in e-waste recycling sites. In the current study, three composite sediment cores were collected from an e-waste-polluted pond located in a typical e-waste recycling site in South China to investigate the historical occurrence and composition of NBFRs and DP. The NBFRs and DP were detected in all layers of the sediment cores with concentration ranges of 5.71~180,895 and 4.95~109,847 ng/g dw, respectively. Except for 2,3,5,6-tetrabromo-p-xylene (pTBX) and 2,3,4,5,6-pentabromoethylbenzene (PBEB), all the NBFR compounds and DP showed a clear increasing trend from the bottom to top layers. These results implied the long-term and severe contamination of NBFRs and DP. Decabromodiphenyl ethane (DBDPE) was the most abundant NBFR with the contribution proportions of 58 +/- 15%, 73 +/- 15%, and 71 +/- 18% in three sediment cores, followed by 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE) and pentabromobenzene (HBB). The ratios of BTBPE/Octa-BDEs and DBDPE/Deca-BDEs varied from 0.12 to 60 and from 0.03 to 0.49, respectively, which had no clear increase trends with a decrease in sediment depth. As for DP, the f(anti) values (the concentration ratios of anti-DP to the sum of anti-DP and syn-DP) in sediment cores ranged from 0.41 to 0.83, almost falling in the range of those in DP technical products, suggesting that DP degradation did not occur in sediment cores. The environmental burdens of DBDPE, BTBPE, HBB, PBT, PBEB, pTBX, and DP were estimated to be 34.0, 5.67, 10.1, 0.02, 0.02, 0.01, and 34.8 kg, respectively. This work provides the first insight into the historical contamination status of NBFRs and DP in the sediments of an e-waste recycling site. FAU - Huang, Chenchen AU - Huang C AD - School of Environmental Science & Spatial Informatics, China University of Mining & Technology, Xuzhou 221116, China. AD - State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. FAU - Zeng, Yanhong AU - Zeng Y AD - State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. AD - Guangdong-Hong Kong-MaCao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. AD - Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou 510640, China. FAU - Liu, Yin-E AU - Liu YE AD - School of Environmental Science & Spatial Informatics, China University of Mining & Technology, Xuzhou 221116, China. AD - State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. FAU - Zhang, Yanting AU - Zhang Y AD - State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. AD - Guangdong-Hong Kong-MaCao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. FAU - Guo, Jian AU - Guo J AD - Guangdong University of Petrochemical Technology, Maoming 525000, China. FAU - Luo, Xiaojun AU - Luo X AD - State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. AD - Guangdong-Hong Kong-MaCao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. AD - Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou 510640, China. FAU - Mai, Bixian AU - Mai B AD - State Key Laboratory of Organic Geochemistry and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. AD - Guangdong-Hong Kong-MaCao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China. AD - Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou 510640, China. LA - eng GR - 42277242/National Natural Science Foundation of China/ GR - 41977306/National Natural Science Foundation of China/ GR - 41931290/National Natural Science Foundation of China/ GR - 42207250/National Natural Science Foundation of China/ GR - 2020B1212060053/Guangdong Foundation for Program of Science and Technology Research/ GR - 2023B1212060049/Guangdong Foundation for Program of Science and Technology Research/ GR - SKLOG2020-7/State Key Laboratory of Organic Geochemistry/ GR - SKLOG2020-4/State Key Laboratory of Organic Geochemistry/ GR - BK20221141/Natural Science Foundation of Jiangsu Province/ GR - 2022ZZCX01K1/Fundamental Research Funds for the Central Universities/ PT - Journal Article DEP - 20240118 PL - Switzerland TA - Toxics JT - Toxics JID - 101639637 PMC - PMC10821507 OTO - NOTNLM OT - composition profile OT - dechlorane plus OT - e-waste recycling site OT - historical occurrence OT - novel brominated flame retardants COIS- The authors declare no conflicts of interest. EDAT- 2024/01/22 06:42 MHDA- 2024/01/22 06:43 PMCR- 2024/01/18 CRDT- 2024/01/22 05:38 PHST- 2023/12/02 00:00 [received] PHST- 2024/01/11 00:00 [revised] PHST- 2024/01/16 00:00 [accepted] PHST- 2024/01/22 06:43 [medline] PHST- 2024/01/22 06:42 [pubmed] PHST- 2024/01/22 05:38 [entrez] PHST- 2024/01/18 00:00 [pmc-release] AID - toxics12010084 [pii] AID - toxics-12-00084 [pii] AID - 10.3390/toxics12010084 [doi] PST - epublish SO - Toxics. 2024 Jan 18;12(1):84. doi: 10.3390/toxics12010084.