کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6310704 | 1307484 | 2013 | 8 صفحه PDF | دانلود رایگان |

The present study finished the first comprehensive survey of polychlorinated dibenzo-p-dioxin and dibenzofurans (PCDD/Fs) in farmland soils of Guiyu, China. Guiyu was a major electronic wastes (EWs) dismantling area, but primitive and crude EWs disposal manner had led to severe PCDD/Fs pollution there. Twenty-three farmland soil samples covering the entire Guiyu region were analyzed. Toxic equivalent quantities (I-TEQs) of soils in EWs disposal areas were 5.7-57 pg TEQ gâ1, and the total concentrations of tetra- to octa-homologues were 2816-17 738 pg gâ1. The SL district was a heavily contaminated area, and the neighboring SMP town was influenced by Guiyu. EWs disposal might be the source of PCDD/Fs. The homologue profiles were of three types, representing different disposal manner of EWs. Tetrachlorodibenzo-p-dioxins (TCDDs) and octachlorodibenzo-p-dioxin (OCDD) could be used as indicators for source identification, open thermal disposal of EWs was inclined to lead to formation of TCDDs, OCDD was a product of non-thermal processes.
⺠The first comprehensive survey of PCDD/Fs in farmland soils of Guiyu, China. ⺠The different disposal manner of e-wastes appeared different homologue profiles. ⺠TCDD was indicator for open thermal disposal of e-wastes. ⺠OCDD was indicator for non-thermal process. ⺠The disposal of e-wastes was the source of PCDD/Fs in Guiyu.
Journal: Chemosphere - Volume 91, Issue 6, May 2013, Pages 824-831