Department of Chemical Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain.
Department of Chemical Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain.
Mar Pollut Bull. 2018 May;130:249-257. doi: 10.1016/j.marpolbul.2018.03.040. Epub 2018 Mar 27.
A mixture of polyethylene (PE), polyethylene-terephtalate (PET), polypropylene (PP) and Nylon was submerged in marine water during 12 moths. The chlorine content of these plastics was measured through the passing time. Thermobalance was used to look for differences in the thermal decomposition of the plastics during in that time interval. Degradation of PET, PP and Nylon produced changes in the weight loss curve, but behaviour of PE is confusing. Pyrolysis and combustion at 850 °C was finally performed to get knowledge of the possible differences in the emission of main gases, volatiles and semivolatiles including polycyclic aromatic hydrocarbons (PAHs), polychlorinated benzenes (ClBzs), polychlorinated phenols (ClPhs), polybrominated phenols (BrPhs), polychlorinated biphenyls (PCBs) and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). Results show that the emission of chlorinated species is somewhat not affected by the chlorine content of the plastics mix. The production of PCBs and PCDD/Fs was very low, under 4 pg WHO-TEQ/g.
将聚乙烯 (PE)、聚对苯二甲酸乙二醇酯 (PET)、聚丙烯 (PP) 和尼龙的混合物浸入海水中 12 个月。通过时间的推移来测量这些塑料中的氯含量。使用热重分析仪在那段时间间隔内寻找塑料热分解的差异。PET、PP 和尼龙的降解导致失重曲线发生变化，但 PE 的行为令人困惑。最后进行 850°C 的热解和燃烧，以了解主要气体、挥发物和半挥发物（包括多环芳烃 (PAHs)、氯苯 (ClBzs)、氯酚 (ClPhs)、多溴酚 (BrPhs)、多氯联苯 (PCBs) 和多氯二苯并对二恶英和呋喃 (PCDD/Fs)）排放方面的可能差异。结果表明，氯化物质的排放受塑料混合物中氯含量的影响不大。PCBs 和 PCDD/Fs 的生成量非常低，低于 4pg WHO-TEQ/g。
