KMS of Research Center for Eco-Environmental Sciences， CAS
| Combined effects of photoaging and natural organic matter on the colloidal stability of nanoplastics in aquatic environments | |
Xu, Yanghui; Ou, Qin; Li, Xiaoming ; Wang, Xintu; van der Hoek, Jan Peter; Liu, Gang
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| 2022 | |
| Source Publication | WATER RESEARCH
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| ISSN | 0043-1354 |
| Volume | 226Pages:119313-1-10 |
| Abstract | The transport and fate of nanoplastics (NPs) in aquatic environments are closely associated with their colloidal stability, which is affected by aging and natural organic matter (NOM) adsorption. This study systematically investigated the combined effects of photoaging and NOM (e.g. humic acids, HA; and a model protein, bovine serum albumin, BSA) on the aggregation kinetics of NPs (polystyrene, PS) in NaCl and CaCl2 solutions. Our results showed that photoaged NPs adsorbed less HA than pristine NPs due to weaker hydrophobic and 7C-7C in-teractions. In return, HA showed weaker impacts on NPs' stability after photoaging. Differently, photoaged NPs absorbed more BSA than pristine NPs due to stronger hydrogen bonding and electrostatic attraction. Thus, the inhibitory effects of BSA on the aggregation kinetics of NPs were enhanced after photoaging. Regarding the effects of NOM on the aging of NPs, our results showed that HA competed with NPs for photons and underwent photo-degradation. Subsequently, the destruction/reconstruction of adsorbed HA increased (in NaCl) or decreased (in CaCl2) the stability of NPs. Notably, light radiation-induced flocculation of BSA molecules, which wrapped and integrated NPs and lead to their destabilization. Overall, this study provided new insights into the aggregation behavior of NPs in aquatic systems, which have significant implications for predicting the transport and fate of NPs in complex real-world environments. |
| Department | 中国科学院饮用水科学与技术重点实验室 |
| Keyword | Nanoplastics Colloidal stability Natural organic matter Photoaging Steric repulsion Photo-flocculation |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/48561 |
| Collection | 中国科学院饮用水科学与技术重点实验室 |
| Affiliation | 1.Chinese Academy of Sciences 2.Research Center for Eco-Environmental Sciences (RCEES) 3.Delft University of Technology 4.University of Chinese Academy of Sciences, CAS 5.Guilin University of Technology |
| Recommended Citation GB/T 7714 | Xu, Yanghui,Ou, Qin,Li, Xiaoming,et al. Combined effects of photoaging and natural organic matter on the colloidal stability of nanoplastics in aquatic environments[J]. WATER RESEARCH,2022,226:119313-1-10. |
| APA | Xu, Yanghui,Ou, Qin,Li, Xiaoming,Wang, Xintu,van der Hoek, Jan Peter,&Liu, Gang.(2022).Combined effects of photoaging and natural organic matter on the colloidal stability of nanoplastics in aquatic environments.WATER RESEARCH,226,119313-1-10. |
| MLA | Xu, Yanghui,et al."Combined effects of photoaging and natural organic matter on the colloidal stability of nanoplastics in aquatic environments".WATER RESEARCH 226(2022):119313-1-10. |
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| Combined effects of （6676KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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