التفاصيل البيبلوغرافية
| العنوان: |
海洋中微塑料的老化机理及老化后环境行为研究进展. (Chinese) |
| Alternate Title: |
Research Progress on Aging Mechanism and Environmental Behavior of Marine Microplastics. (English) |
| المؤلفون: |
郭威, 罗雅丹, 李晨光, 陈琳, 杨宇航, 杨翔昊, 李锋民 |
| المصدر: |
Asian Journals of Ecotoxicology; Aug2022, Vol. 17 Issue 4, p1-14, 14p |
| مصطلحات موضوعية: |
HUMAN body, FIREPROOFING agents, BISPHENOL A, CHEMICAL properties, POLLUTANTS, PHOTODEGRADATION |
| Abstract (English): |
Plastics of small particle size (<5 mm, microplastics, MPs) can be formed via wave action, ultraviolet (UV) irradiation, microbial degradation, etc., which will cause marine ecological risks. This review has summarized types, sources, the aging process, mechanism, and the main influence factors of MPs, as well as variations in physical and chemical properties and environmental behavior of aged MPs. Aging mechanisms of MPs mainly involved mechanical crushing, photodegradation, pyrolysis, hydrolysis, biodegradation, etc., which can be affected by their properties (particle size, shape, functional group, crystallinity, additives, etc.) and environmental conditions in marine (UV irradiation, temperature, redox state, etc.). Physicochemical properties of aged MPs are significantly different from original MPs such as the surface morphology, color, particle size, functional groups, crystallinity, hydrophilicity, and adsorption performance. Meanwhile, the aging process of MPs is accompanied by the release of plasticizers, flame retardants, bisphenol A and other additives. The aging process may influence the adsorption performance of MPs for pollutants (heavy metals, organic pollutants, etc.) in seawater. Additionally, aged MPs may become an accumulation group of pollutants (heavy metals, organic pollutants, etc.) resulting in a greater threat to marine organisms. MPs enriched with pollutants may enter the human body through the food chain, causing a serious threat to human health. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
暴露于海洋环境中的塑料聚合物受海浪破碎、紫外照射、微生物降解等作用后,会逐渐形成小粒径的微塑料(<5 mm,microplastics, MPs),引起海洋生态风险。本文总结了海洋中MPs 的类型和来源、老化过程、机理和影响因素,以及MPs 老化后理 化性质和环境行为的变化。MPs 在海洋中的老化机理主要包括:机械破碎、光降解、热降解、水解和生物降解等,同时MPs 的 自身性质(粒径、形状、官能团、结晶度和添加剂等)和海洋环境条件(紫外辐射、温度、氧化还原状态等)会影响老化过程。老化 后MPs 的理化性质与原始MPs 存在显著差异,如表面形貌、颜色、粒径、官能团、结晶度、亲疏水性和吸附性能等;MPs 老化过 程中还伴着增塑剂、阻燃剂、双酚A 等添加剂的释放。老化过程也会影响MPs 对海水中污染物(重金属、有机污染物等)的吸 附,可能会使MPs 成为污染物的富集体,进而对海洋生物造成更大的危害。此外富集污染物的MPs 可能会通过食物链进入 人体,对人类健康造成危害. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |