School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Sci Total Environ. 2018 Aug 1;631-632:81-91. doi: 10.1016/j.scitotenv.2018.03.009. Epub 2018 Mar 7.
In our study, health risk levels of different age groups of residents living in the vicinity of a municipal solid waste incinerator (MSWI) posed by polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in atmosphere and soil were evaluated. The toxic equivalent concentrations of PCDD/Fs (TEQ) in surrounding atmosphere and soil of studied MSWI were 0.05-0.12 pg I-TEQ Nm and 7.622-15.450 ng I-TEQ kg, respectively. The PCDFs/PCDDs (F/D) values of PCDD/Fs in surrounding atmosphere of studied MSWI ranged from 0.40 to 5.90 with a mean of 1.80, suggesting that the PCDD/Fs mainly came from combustion sources and studied MSWI could be a key source of PCDD/Fs in surrounding atmosphere. The F/D ratios of PCDD/Fs in surrounding soil ranged from 0.18 to 1.81 with a mean of 0.90, suggesting combustion is not the mainly sources of PCDD/Fs in surrounding soil, and studied MSWI may have limited influence on PCDD/Fs in surrounding soil. O8CDD and 2,3,4,7,8-P5CDF could be the total PCDD/Fs and TEQ indicators in surrounding atmosphere of studied MSWI, respectively. The carcinogenic risk (CR) values of PCDD/Fs in surrounding atmosphere and soil for children, teens and adults were 1.24E-06, 9.06E-07 and 4.41E-06, respectively, suggesting that the potential cancer risk occurred but the risk was at acceptable levels for both children and adults (<1.00E-05), and the cancer risk for teens was negligible (<1.00E-06). The non-carcinogenic risk (non-CR) values of three age groups were lower than 1, indicating that no obvious non-carcinogenic effects occurred. Inhalation of air was the largest contributor of health risk (both CR and non-CR) for three age groups. In addition, a comparison of the health risk between PCDD/Fs and other emerging contaminants and traditional pollutants in soil and atmosphere was performed, which will help us have a good view of the health risk levels of PCDD/Fs in surrounding environment of MWSI.
在本研究中，评估了居住在城市固体废物焚烧炉（MSWI）附近的不同年龄段居民通过大气和土壤中的多氯二苯并对二恶英和多氯二苯并呋喃（PCDD/Fs）所面临的健康风险水平。研究 MSWI 周围大气和土壤中 PCDD/Fs 的毒性等效浓度（TEQ）分别为 0.05-0.12 pg I-TEQ Nm 和 7.622-15.450 ng I-TEQ kg。研究 MSWI 周围大气中 PCDD/Fs 的 PCDFs/PCDDs（F/D）值范围为 0.40 至 5.90，平均值为 1.80，表明 PCDD/Fs 主要来自燃烧源，研究 MSWI 可能是周围大气中 PCDD/Fs 的关键来源。周围土壤中 PCDD/Fs 的 F/D 比值范围为 0.18 至 1.81，平均值为 0.90，表明燃烧不是周围土壤中 PCDD/Fs 的主要来源，研究 MSWI 对周围土壤中 PCDD/Fs 的影响可能有限。O8CDD 和 2,3,4,7,8-P5CDF 可能分别是研究 MSWI 周围大气中总 PCDD/Fs 和 TEQ 的指标。儿童、青少年和成年人的 PCDD/Fs 大气和土壤的致癌风险（CR）值分别为 1.24E-06、9.06E-07 和 4.41E-06，表明存在潜在的癌症风险，但对儿童和成年人来说风险处于可接受水平（<1.00E-05），青少年的致癌风险可以忽略不计（<1.00E-06）。三个年龄段的非致癌风险（非-CR）值均低于 1，表明没有发生明显的非致癌作用。对于三个年龄段，吸入空气是健康风险（包括 CR 和非-CR）的最大贡献者。此外，还对土壤和大气中 PCDD/Fs 与其他新兴污染物和传统污染物的健康风险进行了比较，这将有助于我们更好地了解 MSWI 周围环境中 PCDD/Fs 的健康风险水平。
