دورية أكاديمية
أعرض في EDS

Releasing characteristics of toxic chemicals from polystyrene microplastics in the aqueous environment during photoaging process.

التفاصيل البيبلوغرافية
العنوان: Releasing characteristics of toxic chemicals from polystyrene microplastics in the aqueous environment during photoaging process.
المؤلفون: Peng S; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China., Li L; Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, Guangdong, 519087, China; School of Environment, Beijing Normal University, Beijing 100875, China., Wei D; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: weidb@rcees.ac.cn., Chen M; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China., Wang F; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China., Gui Y; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China., Zhao X; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China., Du Y; State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
المصدر: Water research [Water Res] 2024 Jul 01; Vol. 258, pp. 121768. Date of Electronic Publication: 2024 May 14.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Pergamon Press Country of Publication: England NLM ID: 0105072 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-2448 (Electronic) Linking ISSN: 00431354 NLM ISO Abbreviation: Water Res Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Oxford, Pergamon Press.
مواضيع طبية MeSH: Microplastics*/toxicity , Polystyrenes*/chemistry , Polystyrenes*/toxicity , Water Pollutants, Chemical*/toxicity , Water Pollutants, Chemical*/chemistry, Ultraviolet Rays ; Kinetics
مستخلص: Microplastics (MPs) are pervasive in the environment and inevitably undergo photoaging due to UV irradiation. This study delved into the dynamic releasing and transformation process of toxic chemicals from polystyrene microplastics (PS MPs) during photoaging, a subject that remains underexplored. It was revealed that photoaging led to substantial alterations in the physicochemical properties of PS MPs, initiating polymer chain scission and facilitating the release of a large number of toxic chemicals, including numerous organic compounds and several inorganic compounds. The kinetic analysis revealed a dynamic release pattern for PS MPs, where under varying UV intensities (2, 5, and 10 mW/cm 2 ), the release rate (k DOC ) initially increased and then decreased, peaking at a total irradiation energy of approximately 7 kW·h/m 2 . Furthermore, chemicals in leachate were transformed into compounds with smaller molecular weight, higher oxidized and greater unsaturated state over the prolonged photoaging. This transformation was primarily attributed to two reasons. Firstly, the aged PS MPs released chemicals with higher oxidized state compared to the pristine MPs. Secondly, the chemicals previously released underwent further reactions. Besides, among the complex leachate generated by aged PS MPs, the organic chemicals characterized by small molecular weight and high oxidized state exhibited notable acute toxicity, whereas heavy metal ions showed lesser toxicity, and anions were non-toxic. This study shed more light on the photoaging process of PS MPs, releasing characteristics of organic chemicals, and the potential environmental risks associated with plastic wastes.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
فهرسة مساهمة: Keywords: Acute toxicity; Microplastics; Photoaging process; Releasing rate; Toxic chemicals
المشرفين على المادة: 0 (Microplastics)
0 (Polystyrenes)
0 (Water Pollutants, Chemical)
تواريخ الأحداث: Date Created: 20240518 Date Completed: 20240614 Latest Revision: 20240614
رمز التحديث: 20240615
DOI: 10.1016/j.watres.2024.121768
PMID: 38761594
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-2448
DOI:10.1016/j.watres.2024.121768