POLYBROMINATED DIBENZO- P-DIOXINS/DIBENZOFURANS AND POLYBROMINATED DIPHENYL ETHERS IN ENVIRONMENTAL SAMPLES FROM AN ELECTRONIC WASTE RECYCLING FACILITY AND A CHEMICAL INDUSTRY COMPLEX IN EASTERN CHINA

摘要

The release of polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs) from thermal treatment of electronic waste (e-waste) containing brominated flame retardants has gotten greater environmental concern than ever before. However, the information on actual emission sources from e-waste recycling and thermal recovery approaches is scarce. In this study, 11 2378-substituted PBDD/Fs and 10 polybrominated diphenyl ethers (PBDEs) congeners were measured in electronics shredder waste, workshop-floor dust, soil, and leaves from an e-waste recycling facility and in surface soil from a chemical industrial complex and agricultural areas in China. The highest mean concentration of ΣPBDD/Fs was found in soil and dust samples from e-waste recycling facility. The elevated TEQ concentrations of PBDD/Fs were greater than polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) measured in the same samples in our previous study. In accordance with chlorinated analogues, concentrations of PBDFs were greater than those of PBDDs in all samples analyzed from e-waste facility and in soil from the chemical industry complex. Statistic correlations were found between ΣPBDD/Fs and ΣPBDEs, and between ΣPBDD/Fs and ΣPCDD/Fs. The estimated daily intakes of TEQs of PBDD/Fs via soil/dust ingestion and dermal exposures in e-waste recycling operations are expected to be higher than the exposure to PCDD/Fs calculated in our previous study.