Opposite impact of DOM on ROS generation and photoaging of aromatic and aliphatic nano- and micro-plastic particles

doi:10.1016/j.envpol.2022.120304

	Opposite impact of DOM on ROS generation and photoaging of aromatic and aliphatic nano- and micro-plastic particles
	Cao, Runzi ; Liu, Xinna 1,2,3; Duan, Jiajun ; Gao, Bowen ; He, Xiaosong 4; Bolan, Nanthi 5,6; Li, Yang
	2022
发表期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
卷号	315
摘要	Dissolved organic matter (DOM) plays a significant role in the photochemical behavior of nano-and micro-plastic particles (NPs/MPs). We investigated the influence of DOM on the mechanism on the photoaging of NPs/MPs with different molecular structures under UV365 irradiation in water. DOM components used in this study are mainly humic acid and fulvic acid. The results showed that DOM promoted the weathering of aliphatic NPs/MPs (polypropylene (PP)), but inhibited or had only a minor effect on the photoaging of aromatic NPs/MPs (poly-styrene (PS) NPs/MPs, carboxyl-modified PS NPs, amino-modified PS NPs, and polycarbonate MPs). NPs with a large surface area may adsorb sufficient DOM on the particle surfaces through pi-pi interactions, which competes with NPs for photon absorption sites, thus, can delay the photoaging of PS NPs. Aromatic MPs may release phenolic compounds that quench center dot OH, thereby weakening the photoaging process. For aliphatic MPs, the detection of peracid, aldehyde, and ketone groups on the polymer surface indicated that DOM promoted weathering of PP MPs, which was primarily because the generation of center dot OH due to DOM photolysis may attack the polymer by C-C bond cleavage and hydrogen extraction reactions. This study provides insight into the UV irradiation weathering process of NPs/MPs of various compositions and structures, which are globally distributed in water.
关键词	Particulate plastics Dissolved organic matter Weathering Reactive oxygen species UV irradiation
学科领域	Environmental Sciences
DOI	10.1016/j.envpol.2022.120304
收录类别	SCI
语种	英语
WOS关键词	DISSOLVED ORGANIC-MATTER ; HUMIC-ACID ; PHOTOCHEMICAL FORMATION ; OXYGEN ; MICROPLASTICS ; PHOTODEGRADATION ; NANOPARTICLES ; PHOTOGENERATION ; NANOPLASTICS ; EXPOSURE
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000869487100004
出版者	ELSEVIER SCI LTD
文献子类	Article
出版地	OXFORD
EISSN	1873-6424
资助机构	Fund for National Key R & D Program of China [2021YFC3200401] ; National Natural Science Foundation of China [52171018, 21677015, 22006031] ; Natural Science Foundation of Hebei Province [B2019204315]
作者邮箱	202021180038@mail.bnu.edu.cn ; liyang_bnu@bnu.edu.cn
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28809
专题	中科院北方资源植物重点实验室
作者单位	1.Beijing Normal Univ, Sch Environm, Key Lab Water & Sediment Sci, State Key Lab Water Environm Simulat,Minist Educ, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Inst Bot, Beijing Key Lab Grape Sci & Enol, Beijing 100093, Peoples R China 3.Chinese Acad Sci, Inst Bot, Key Lab Plant Resources, Beijing 100093, Peoples R China 4.Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China 5.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 6.Univ Western Australia, Sch Agr & Environm, Perth, WA 6009, Australia 7.Univ Western Australia, UWA Inst Agr, Perth, WA 6009, Australia
推荐引用方式 GB/T 7714	Cao, Runzi,Liu, Xinna,Duan, Jiajun,et al. Opposite impact of DOM on ROS generation and photoaging of aromatic and aliphatic nano- and micro-plastic particles[J]. ENVIRONMENTAL POLLUTION,2022,315.
APA	Cao, Runzi.,Liu, Xinna.,Duan, Jiajun.,Gao, Bowen.,He, Xiaosong.,...&Li, Yang.(2022).Opposite impact of DOM on ROS generation and photoaging of aromatic and aliphatic nano- and micro-plastic particles.ENVIRONMENTAL POLLUTION,315.
MLA	Cao, Runzi,et al."Opposite impact of DOM on ROS generation and photoaging of aromatic and aliphatic nano- and micro-plastic particles".ENVIRONMENTAL POLLUTION 315(2022).

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