CAJ | 학술논문

选取南方某典型电子垃圾拆解区不同作业区为研究对象，重点研究了拆解地大气中二噁英的污染特征、气相-颗粒相分配及呼吸暴露风险。通过对5个采样点（包括1个背景点）的研究发现，电子垃圾拆解作业区颗粒相ΣPCDD/Fs的质量浓度为：20.64~56.14 pg·m-3，毒性当量为：I-TEQ 0.293~1.490 pg·m-3；气相ΣPCDD/Fs的质量浓度为：3.861~19.29 pg·m-3，毒性当量为：I-TEQ 0.384~2.150 pg·m-3。背景点大气中二噁英浓度相对较低，颗粒相和气相样品中质量浓度值分别为：3.734 pg·m-3和2.637 pg·m-3,毒性当量仅为I-TEQ 0.176~0.267 pg·m-3；要明显低于电子垃圾拆解区。基于污染物气相-颗粒相分配系数与蒸汽压的关系对二噁英的气-固分配行为研究显示，除了拆解混合作业区有较好的分配系数(-0.64)外，其它监测点位二噁英的气-固平衡状态较弱（-0.27~-0.03），更多的是以低分子量的单体化合物赋存于气相样品中。对拆解区二噁英呼吸暴露风险研究结果表明，儿童呼吸暴露风险要高于成年人；同时无论是儿童还是成年人，其二噁英的呼吸暴露量均要高于国内外城市报道的二噁英人体呼吸暴露量，说明本次监测的电子垃圾拆解区存在的潜在健康风险不容忽视。
선취남방모전형전자랄급탁해구불동작업구위연구대상，중점연구료탁해지대기중이오영적오염특정、기상-과립상분배급호흡폭로풍험。통과대5개채양점（포괄1개배경점）적연구발현，전자랄급탁해작업구과립상ΣPCDD/Fs적질량농도위：20.64~56.14 pg·m-3，독성당량위：I-TEQ 0.293~1.490 pg·m-3；기상ΣPCDD/Fs적질량농도위：3.861~19.29 pg·m-3，독성당량위：I-TEQ 0.384~2.150 pg·m-3。배경점대기중이오영농도상대교저，과립상화기상양품중질량농도치분별위：3.734 pg·m-3화2.637 pg·m-3,독성당량부위I-TEQ 0.176~0.267 pg·m-3；요명현저우전자랄급탁해구。기우오염물기상-과립상분배계수여증기압적관계대이오영적기-고분배행위연구현시，제료탁해혼합작업구유교호적분배계수(-0.64)외，기타감측점위이오영적기-고평형상태교약（-0.27~-0.03），경다적시이저분자량적단체화합물부존우기상양품중。대탁해구이오영호흡폭로풍험연구결과표명，인동호흡폭로풍험요고우성년인；동시무론시인동환시성년인，기이오영적호흡폭로량균요고우국내외성시보도적이오영인체호흡폭로량，설명본차감측적전자랄급탁해구존재적잠재건강풍험불용홀시。
Different operating sites in the typical electronic waste (E-waste) dismantling region, south China, have been selected to study. A short-term sampling scheme was devised to determine the levels of gas/particle-bound polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in and to evaluate the impact of PCDD/Fs on the lives of the inhabitants in E-waste dismantling region. Samples were collected from five different operating sites (including one background) of dismantling area, and the results indicated that the particle and gas PCDD/Fs concentrations (toxic equivalent quantity (TEQ)) for dismantling area were 20.64-56.14 pg·m-3(0.293-1.490 pg I-TEQ·m-3) and 3.861-19.29 pg·m-3 (0.384-2.150 pg I-TEQ·m-3), respectively, which were higher than the concentration of particle and gas PCDD/Fs(3.734 pg·m-3 and 2.637 pg·m-3) for the background, and the TEQ in the latter sampling site only has 0.176-0.267 pg I-TEQ·m-3. Based on relation of gas/particle partitioning coefficient and sub-cooled liquid vapor pressure pressure for pollutants, the research for behavior of PCDD/Fs in gas/particle partitioning showed that the gas/particle equilibrium state was weak (-0.27~-0.03) in the most of monitoring sites, except for mixed operation site (the distribution coefficient was-0.64), which were more low molecular weight of monomer compounds in gas phase. Results of daily intake of PCDD/Fs by inhaling air suggested that the inhalation exposure of PCDD/Fs by the inhabitants for children is higher than adults. In addition, the results were higher than daily intake of PCDD/Fs in other city, which indicated that the potential health risks of e-waste dismantling region in this research can not be ignored.