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Leaching of decabromodiphenyl ether and hexabromocyclododecane from fabrics under simulated landfill conditions

Emerging Contaminants 2020年第1期6卷 33-38页

作者： Stuart Harrad Daniel S.Drage Martin Sharkey harald berresheim School of Geography Earth and Environmental SciencesUniversity of BirminghamBirminghamB152TTUK School of Physics National University of Ireland GalwayGalwayIreland

A series of laboratory experiments were conducted to examine the leaching of decabromodiphenyl ether(BDE-209)and hexabromocyclododecane(HBCDD)from a mix of three *** with previous reports that such leaching is governed by second order kinetics,concentrations in leachate were markedly higher in the first 24 h of leaching,and diminished by an order of magnitude after 1 *** influence of the waste:leachate ratio was examined for the first time,with leaching of both BDE-209 and HBCDD significantly greater(p<0.05)at a waste:leachate ratio of 0.005 g/mL than at 0.05 g/*** dissolved humic matter(DHM)solutions as proxy for simulating organic landfill leachates we found that leaching of both BDE-209 and HBCDD was also significantly greater at a DHM concentration of 1,000 mg/L in leachate compared to that observed at DHM values of 100 and 0 mg/*** of waste:leachate mixtures significantly enhanced *** leaching of HBCDD decreased significantly as leachate pH increased from 5.8,through 6.5,to 8.5;no significant impact of pH on leaching of BDE-209 was *** in leachate of both BDE-209 and HBCDD decreased significantly on increasing leachate temperature from 20℃to 60℃and 80℃.This is considered most likely due to volatilisation of these contaminants into the headspace of the leaching vessel at higher temperatures.

关键词： Brominated flame retardants Leachate pH Organic matter content Temperature waste:leachate ratio

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