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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Sci+Rep 2014 ; 4 (ä): ä Nephropedia Template TP
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Dioxins contamination in the feed additive (feed grade cupric sulfate) tied to chlorine industry #MMPMID25102073
Wang P; Zhang Q; Lan Y; Xu S; Gao R; Li G; Zhang H; Shang H; Ren D; Zhu C; Li Y; Li X; Jiang G
Sci Rep 2014[]; 4 (ä): ä PMID25102073show ga
The sources of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) found in animal feed additive (feed grade cupric sulfate, CuSO4) were investigated and traced back to the formation of chlorinated organic compounds in the chlor-alkali industry. PCDD/Fs could be transported through the supply chain: hydrochloric acid (HCl) by-produced during formation of chlorinated organic compounds in chlor-alkali industry ? spent acid etching solution (acid-SES) generated in printed circuit board production ? industrial cupric salt ? CuSO4 in animal feed, and finally enter the food chain. The concentration ranges in HCl and acid-SES were similar, of which the level in acid-SES was also consistent with that in various cupric salt products including CuSO4 based on Cu element content. PCDD/Fs also showed very similar congener profiles in all the sample types. This indicates a probable direct transport pathway of PCDD/Fs into the food chain, which may eventually be exposed to humans through consumption. To date this is the first study in China that systematically reports on the PCDD/Fs transport from industrial pollution sources to industrial processes and finally enters the human food chain.