Pivnenko K, Eriksen M K, Martín-Fernández J A, Eriksson E, Astrup T F
Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
Waste Manag. 2016 Aug;54:44-52. doi: 10.1016/j.wasman.2016.05.014.
Plastics recycling has the potential to substitute virgin plastics partially as a source of raw materials in plastic product manufacturing. Plastic as a material may contain a variety of chemicals, some potentially hazardous. Phthalates, for instance, are a group of chemicals produced in large volumes and are commonly used as plasticisers in plastics manufacturing. Potential impacts on human health require restricted use in selected applications and a need for the closer monitoring of potential sources of human exposure. Although the presence of phthalates in a variety of plastics has been recognised, the influence of plastic recycling on phthalate content has been hypothesised but not well documented. In the present work we analysed selected phthalates (DMP, DEP, DPP, DiBP, DBP, BBzP, DEHP, DCHP and DnOP) in samples of waste plastics as well as recycled and virgin plastics. DBP, DiBP and DEHP had the highest frequency of detection in the samples analysed, with 360μg/g, 460μg/g and 2700μg/g as the maximum measured concentrations, respectively. Among other, statistical analysis of the analytical results suggested that phthalates were potentially added in the later stages of plastic product manufacturing (labelling, gluing, etc.) and were not removed following recycling of household waste plastics. Furthermore, DEHP was identified as a potential indicator for phthalate contamination of plastics. Close monitoring of plastics intended for phthalates-sensitive applications is recommended if recycled plastics are to be used as raw material in production.
塑料回收有潜力部分替代原生塑料,作为塑料制品制造中的原材料来源。塑料作为一种材料可能含有多种化学物质,其中一些可能具有危险性。例如,邻苯二甲酸盐是一类大量生产的化学物质,常用于塑料制造中的增塑剂。对人类健康的潜在影响要求在特定应用中限制使用,并需要更密切地监测人类接触的潜在来源。尽管已经认识到各种塑料中存在邻苯二甲酸盐,但塑料回收对邻苯二甲酸盐含量的影响只是一种假设,尚未得到充分记录。在本研究中,我们分析了废塑料以及回收塑料和原生塑料样品中的选定邻苯二甲酸盐(邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二丙酯、邻苯二甲酸二异丁酯、邻苯二甲酸二丁酯、邻苯二甲酸苄基丁酯、邻苯二甲酸二(2-乙基己基)酯、邻苯二甲酸二环己酯和邻苯二甲酸二正辛酯)。在分析的样品中,邻苯二甲酸二丁酯、邻苯二甲酸二异丁酯和邻苯二甲酸二(2-乙基己基)酯的检测频率最高,最大测量浓度分别为360μg/g、460μg/g和2700μg/g。此外,分析结果的统计分析表明,邻苯二甲酸盐可能是在塑料制品制造的后期阶段(标签、胶合等)添加的,并且在家庭废塑料回收后并未去除。此外,邻苯二甲酸二(2-乙基己基)酯被确定为塑料中邻苯二甲酸盐污染的潜在指标。如果要将回收塑料用作生产中的原材料,建议密切监测用于对邻苯二甲酸盐敏感应用的塑料。