Dioxins and furans in industries and processes using chlorine base chemicals

摘要

The study aimed to measure 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD), dioxins congeners and precursors in industries and related processes involving chlorine base material. The representative samples were collected from pulp and paper mill, plastic and PVC, chloro-organic and chlorine base industries, thermal power plants, brick kilns, crematorium and incinerators and land fills. 2,3,7,8-TCDD was found only in 7% of the total 85 samples analysed. The highest level of 0.27 ng g-1 of 2,3,7,8-TCDD was found in the ash collected from hospital-waste incinerator. 2,3,7,8-TCDD ranged from BDL to 0.2 ngL-1 / ng g-1 in the effluent and sludge samples collected from pulp and paper mills, plastic and PVC and chloro-organic industries. Tri, tetra and hexachlorodibenzo-p-dioxins (tri, tetra and hexa-TCDDs) and octachlorodibenzofuran (OCDF) were found in the effluent and sludge samples. Tri, hexa and hepta polychlorinated biphenyls (PCBs) and tri and penta chlorophenols (TCP & PCPs) and others were also found in the samples.