School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
School of Marine Science and Technology, Tianjin University, Tianjin 300072, China.
Waste Manag. 2017 Apr;62:169-176. doi: 10.1016/j.wasman.2017.02.014. Epub 2017 Feb 20.
Municipal solid waste (MSW) landfill was a main way to disposal of MSW and almost 95% of MSW was disposed by landfills in the world. In order to understand the influence of MSW landfill on polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in surrounding atmosphere, 42 ambient air samples were collected and analyzed from surrounding sites, background site, upwind site and downwind site of a MSW landfill in East China. The results of present study were summarized as follows. (1) The total concentrations of PCDD/Fs (∑PCDD/Fs) in ambient air from surrounding sites, background site, upwind site and downwind site were 2.215±1.004, 2.058±0.458, 2.617±1.092 and 1.822±0.566pgNm, respectively. (2) The toxic equivalent concentrations (TEQ) of PCDD/Fs in ambient air from surrounding sites, background site, upwind site and downwind site were 0.103±0.017, 0.096±0.015, 0.120±0.024 and 0.108±0.014pg I-TEQNm, respectively. (3) The congener profiles, ∑PCDD/Fs and TEQ between background atmosphere and surrounding atmosphere of landfill did not show statistically significant difference. (4) The ∑PCDD/Fs and TEQ in ambient air of downwind site were not higher than that of upwind site, suggesting that studied landfill did not have obvious influence on PCDD/Fs in ambient air from downwind site. (5) The 95th percentile carcinogenic risk (CR) of PCDD/Fs in ambient air from surrounding sites, background site, upwind site and downwind site were 8.03×10, 7.57×10, 9.69×10 and 8.15×10, respectively, which were much lower than the threshold value of CR (10), suggesting that studied landfill did not influence the CR of PCDD/Fs in surrounding atmosphere and negligible cancer risk occurred. (6) The non-carcinogenic risk (non-CR) analysis indicated that landfill did not have influence on the non-CR of PCDD/Fs in surrounding atmosphere and no obvious non-carcinogenic effects developed.
城市生活垃圾（MSW）填埋场是处理 MSW 的主要方式，几乎 95%的 MSW 是通过填埋场处理的。为了了解 MSW 填埋场对周围大气中多氯二苯并对二恶英和多氯二苯并呋喃（PCDD/Fs）的影响，本研究从中国东部的一个 MSW 填埋场周围场地、背景场地、上风场地和下风场地收集并分析了 42 个环境空气样本。本研究的结果总结如下。（1）周围场地、背景场地、上风场地和下风场地环境空气中的 PCDD/Fs 总浓度（∑PCDD/Fs）分别为 2.215±1.004、2.058±0.458、2.617±1.092 和 1.822±0.566pgNm。（2）周围场地、背景场地、上风场地和下风场地环境空气中的 PCDD/Fs 毒性当量浓度（TEQ）分别为 0.103±0.017、0.096±0.015、0.120±0.024 和 0.108±0.014pg I-TEQNm。（3）背景大气与填埋场周围大气中的同系物分布、∑PCDD/Fs 和 TEQ 没有表现出统计学上的显著差异。（4）下风场地环境空气中的∑PCDD/Fs 和 TEQ 并不高于上风场地，表明研究中的填埋场对下风场地环境空气中的 PCDD/Fs 没有明显的影响。（5）周围场地、背景场地、上风场地和下风场地环境空气中的 PCDD/Fs 的 95%百分位致癌风险（CR）分别为 8.03×10、7.57×10、9.69×10 和 8.15×10，均远低于 CR 的阈值（10），表明研究中的填埋场没有影响周围大气中 PCDD/Fs 的 CR，没有发生可忽略的致癌风险。（6）非致癌风险（non-CR）分析表明，填埋场没有影响周围大气中 PCDD/Fs 的 non-CR，没有明显的非致癌效应。
