Bhupander Kumar, Richa Gaur, Gargi Goel, Sanjay Kumar and C. S. Sharma
In this study seventeen congeners of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzo-p-furans (PCDDs/Fs) in selected solid wastes analyzed by HRGC-HRMS applying the isotopic dilution technique. Recovery rates of spiked 13C12-labeled standard compounds were calculated and found within the accepted ranges for all the samples. The observed concentration of 17 PCDDs/Fs was 13763.00 pg g-1, 256.66 pg g-1, 1857.63 pg g-1 and 9.64 pg g-1 dw, in sewage sludge, paper mill sludge, industrial contaminated soil and flyash, respectively. The 2,3,7,8- TeCDD substituted toxic equivalent (I-TEQ) was 77.068 pg I-TEQ g-1, 11.319 pg I-TEQ g-1, 96.316 pg I-TEQ g-1 and 0.401 pg I-TEQ g-1, respectively. OCDD, Hep-CDD, OCDF, Hep-CDF and TCDF were the dominant congeners. In this study, the ratio of ΣPCDD/ΣPCDF was 10.39, 4.91, 4.28 and 3.97 for sewage sludge, paper mill sludge, soil and flyash, respectively which indicates that PCDD/Fs sources in the studied samples were contaminated significantly with the mechanism of the precursor formation routes. The concentration levels observed in this study were lower than recommended guideline values
English 
Spanish 
Chinese 
Russian 
German 
Japanese 
Portuguese 
Hindi