Octachlorodibenzodioxin (can be abbreviated as OCDD or OctaCDD) is one of polychlorinated dibenzodioxins (PCDDs). Its toxicity is similar to TCDD, but it is about 3000 times weaker. [1]

2009年5月19日 · Octachlorodibenzo-p-dioxins are chlorinated dibenzo-p-dioxin (CDD) congeners. CDDs are a class of manufactured chemicals that consist of dioxin skeletel structures with chlorine substituents. They are also persistent organic pollutants (POPs), thus their production is regulated in most areas.

2022年1月1日 · Highlights • Cost-effective mono- to octa-CDD/Fs clean-up method is developed. • Ni/C is of highest activity in PCDD/Fs catalytic pyrolysis process. • Mono- to Tri-CDDs are reformed during pyrolysis process. • Catalysts inhibit the reformation of low chlorinated PCDD/Fs.

2021年3月15日 · The levels of tri-to octa-CDD/Fs (∑PCDD/Fs), tri-to deca-CBs (∑PCBs), and WHO-TEQ in the collected animal foods were found to be in the ranges of 0.4–14.3 pg/g, 0.04–2.8 ng/g, and 0.013–0.75 pg/g on a fresh weight basis, respectively.

2013年9月3日 · Mono- to octa-chlorinated dibenzo-p-dioxins and dibenzofurans (mono- to octa-CDD/Fs) were determined in 14 stack gas samples from two municipal solid waste incinerators and two medical waste incinerators. The total PCDD/F concentrations were 5.1-390 ng/Nm (3), and the mono- to trichlorinated homologu …

2023年8月10日 · Significant inhibition effects of CaO on PCDD/Fs and the hepta~octa chlorinated congeners were identified. The dechlorination of carbon matrix and Cu-based catalysts were promoted by CaO. Dechlorination effects of high chlorinated congeners by CaO were validated.

Annual mono- to tri-CDD/Fs PCDD/F and TEQ (tetra- to octa-CDD/F) emission factors for flue gas and gypsum between 2003 and 2012 were determined. The total amounts of mono- to tri-CDD/Fs emitted in flue gas and gypsum between 2003 and 2012 were 10.7 and 10.2 kg, respectively.

2016年5月17日 · The influence of desulfurization systems in sintering plants on polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) concentrations, profiles, and emission factors was studied. Mono- to tri-CDD/Fs and tetra- to octa-CDD/F concentrations were 4.4 ± 2.3 and 10.5 ± 8.3 ng m (-3), respectively, at …

The tissue distribution of 2,3,7,8-chlorine substituted dibenzo-p-dioxins was conducted in 11 patients who died of cancer. The concentration of octachlorodibenzo-p-dioxin (octa-CDD) was the highest in each organ and tissue and hepta-CDD was also found at relatively high levels, second only to OCDD. …

2023年9月13日 · Under low-temperature conditions (250 °C and 290 °C), both PCDD and PCDF were mainly composed of octa-chlorinated homologues, with the proportion of each homologue decreasing as the degree of chlorination decreased.