Dimassi Sarra N, Hahladakis John N, Yahia Mohamed Nejib Daly, Ahmad Mohammad I, Sayadi Sami, Al-Ghouti Mohammad A
Environmental Science Program, Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar; Food-Water-Waste (FWWS) Sustainability Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar.
Food-Water-Waste (FWWS) Sustainability Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar; Chemistry and Earth Sciences Department, Qatar University, College of Arts and Sciences, P.O. Box: 2713, Doha, Qatar.
Sci Total Environ. 2023 Oct 10;894:164954. doi: 10.1016/j.scitotenv.2023.164954. Epub 2023 Jun 17.
This study investigates the leaching potential of several additives embedded in six different plastic types when exposed to extreme simulated marine conditions for 140 days. The findings achieved herein contribute to a better understanding of the impact of macro- and microplastics leaching harmful compounds (bisphenol A (BPA) and phthalates) in the marine environment when exposed to harsh climatic conditions. Leachability experiments showed that bis(2-ethylhexyl) phthalate (DEHP), dibutyl phthalate (DBP), and BPA were detected in seawater (SW) samples. Furthermore, while analysing 100 mL of SW per each sample, the total leachate concentrations of the identified compounds ranged from 5 μg/L to 123 μg/L, after 140 days of exposing a total of 120 plastic samples (96 samples micro- and 24 macro-plastics) to SW conditions It was observed that the leaching of DEHP was promoted by wave abrasion, high temperature and sunlight, while the leaching of DBP was favoured by wave abrasion. Findings showed that polypropylene (PP) was the most attributable plastic type in the leaching of DBP with an average concentration of 5.3 μg/L, whereas high-density polyethylene (HDPE) was the most responsible plastic-type for the leaching of DEHP, with an average concentration of 123 μg/L. Our results suggest that most of the phthalates and BPA will, ultimately, leach out to the SW environment after a longer period.
本研究调查了六种不同塑料类型中嵌入的几种添加剂在极端模拟海洋条件下暴露140天的浸出潜力。本文取得的研究结果有助于更好地理解宏观和微观塑料在暴露于恶劣气候条件下时向海洋环境中浸出有害化合物（双酚A（BPA）和邻苯二甲酸盐）的影响。浸出性实验表明，在海水（SW）样品中检测到了邻苯二甲酸二（2-乙基己基）酯（DEHP）、邻苯二甲酸二丁酯（DBP）和BPA。此外，在对每个样品分析100mL SW时，在将总共120个塑料样品（96个微塑料和24个宏塑料）暴露于SW条件140天后，所鉴定化合物的总浸出液浓度范围为5μg/L至123μg/L。观察到，DEHP的浸出受到波浪磨损、高温和阳光的促进，而DBP的浸出则受到波浪磨损的青睐。研究结果表明，聚丙烯（PP）是DBP浸出中最主要的塑料类型，平均浓度为5.3μg/L，而高密度聚乙烯（HDPE）是DEHP浸出中最主要的塑料类型，平均浓度为123μg/L。我们的结果表明，大多数邻苯二甲酸盐和BPA最终在更长时间后会浸出到SW环境中。
