文摘
Polychlorinated dibenzo-p-dioxins/furans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (DL-PCBs) were measured by high resolution gas chromatograph/high resolution mass spectrometer (HRGC/HRMS) in six food groups from Luqiao (LQ) where the e-waste has been recycled and from Yuhang (YH) where the agriculture dominates in Zhejiang Province in China. The total WHO-TEQ values of PCDD/Fs and DL-PCBs in selected foods from LQ were significantly much higher than those from YH. The highest level of the total WHO-TEQ was in crucian carp (10.87 pg g? w.w.) followed by duck (3.77 pg g? w.w.), hen eggs (2.80 pg g? w.w.), chicken (2.43 pg g? w.w.), rice (0.08 pg g? w.w.) and vegetables (0.022 pg g? w.w.) in LQ. By contrast, the highest levels were measured in duck (0.74 pg g? w.w.) followed by hen eggs (0.69 pg g? w.w.), crucian carp (0.55 pg g? w.w.), chicken (0.44 pg g? w.w.), vegetables (0.002 pg g? w.w.) and rice (0.0002 pg g? w.w.) in YH, respectively. The monthly intake of PCDD/Fs and DL-PCBs for the local residents was 401.75 pg WHO-TEQ g? w.w. in LQ, which is above the provisional tolerable monthly intake (PTMI) set by the Joint FAO/WHO Expert Committee on Food Additives (JECFA). We determined a monthly intake of 37.13 pg WHO-TEQ g? w.w. in YH, which is below the PTMI. Crucian carp was the predominant contributor to the estimated monthly intake (EMI), accounting for 67.74 % and 36.51 % in LQ and YH, respectively. High levels of PCDD/Fs and DL-PCBs in selected foods indicate severe contamination of these pollutants in the e-waste recycling site.