Ben Yujie, Li Tong, Wan Yi, Dong Zhaomin, Hu Jianying
MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
Environ Pollut. 2017 May;224:532-540. doi: 10.1016/j.envpol.2017.02.036. Epub 2017 Feb 22.
While the exposure assessment of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/Fs) for people living in the vicinity of municipal solid waste incinerators (MSWI) has been investigated, indirect exposure to MSWI-emitted PCDD/Fs via consumption of local foods has not been well assessed. In this study, the PCDD/F concentration in the local vegetables grown near a MSWI located in Shenzhen, South China, was determined to be 0.92 ± 0.59 pg/g wet weight (ww), significantly higher than that (0.25 ± 0.35 pg/g ww) in commercial vegetables (p < 0.05). The PCDD/F concentrations in Banyan leaf (Ficus microcarpa) samples collected from 5 sampling sites at 1 km intervals from the MSWI were found to be significantly decreased with increasing distance, suggesting that the local plants would be impacted by emissions from the MSWI. The exposure assessment of PCDD/Fs for the population living in the vicinity of MSWI was carried out by simultaneously analyzing PCDD/Fs in other food groups that were commonly consumed by the residents. If only the local vegetables were consumed and other foods were acquired commercially, the total dietary intake for a general adult was 0.94 ± 0.41 pg TEQ/kg bw/day, of which consumption of local vegetables accounted for 52.3%. If all foods consumed including vegetables were from a commercial source, the total dietary intake was 0.56 ± 0.30 pg TEQ/kg bw/day, of which consumption of commercial vegetables accounted for 20.1%. The present study for the first time reported the additional human exposure to PCDD/Fs via consumption of local vegetables impacted by emissions from MSWI.
虽然已对生活在城市固体废物焚烧炉（MSWI）附近居民的多氯二苯并 - 对二噁英和多氯二苯并呋喃（PCDD/Fs）暴露情况进行了调查，但通过食用当地食物而间接接触MSWI排放的PCDD/Fs的情况尚未得到充分评估。在本研究中，测定了中国南方深圳一座MSWI附近种植的当地蔬菜中PCDD/Fs的浓度为0.92±0.59 pg/g湿重（ww），显著高于市售蔬菜（0.25±0.35 pg/g ww）（p<0.05）。从距MSWI每隔1公里的5个采样点采集的榕树叶（小叶榕）样本中PCDD/Fs浓度随距离增加而显著降低，表明当地植物会受到MSWI排放物的影响。通过同时分析居民通常食用的其他食物组中的PCDD/Fs，对生活在MSWI附近人群的PCDD/Fs暴露情况进行了评估。如果仅食用当地蔬菜且其他食物从市场购买，普通成年人的总膳食摄入量为0.94±0.41 pg TEQ/kg体重/天，其中食用当地蔬菜占52.3%。如果包括蔬菜在内的所有食用食物均来自市场，总膳食摄入量为0.56±0.30 pg TEQ/kg体重/天，其中市售蔬菜的消费量占20.1%。本研究首次报告了因食用受MSWI排放影响的当地蔬菜而导致人群额外接触PCDD/Fs的情况。
