DOI: 10.1016/j.watres.2020.115634
论文题名: High temperature depended on the ageing mechanism of microplastics under different environmental conditions and its effect on the distribution of organic pollutants
作者: Ding L. ; Mao R. ; Ma S. ; Guo X. ; Zhu L.
刊名: Water Research
ISSN: 431354
出版年: 2020
卷: 174 语种: 英语
英文关键词: 2D-COS
; Adsorption
; Ageing mechanism
; Microplastics
; Organic pollution
Scopus关键词: Adsorption
; Elastomers
; Fourier transform infrared spectroscopy
; Hydrogen bonds
; Microplastic
; Mineral oils
; Molecules
; Oxygen
; Polycyclic aromatic hydrocarbons
; Antibiotic contaminants
; Characteristics and mechanisms
; Correlation spectroscopy
; Environmental behavior
; Environmental conditions
; Fourier transform infrared
; Microplastics
; Organic pollution
; Organic pollutants
; functional group
; microplastic
; oxygen
; polycyclic aromatic hydrocarbon
; polystyrene
; sea water
; adsorption
; aging
; antibiotics
; chemical bonding
; correlation
; functional group
; high temperature
; hydrogen
; hydrophobicity
; organic pollutant
; PAH
; plastic
; seawater
; adsorption
; Article
; controlled study
; Fourier transform infrared spectroscopy
; high temperature
; hydrogen bond
; hydrophobicity
; organic pollution
; photon correlation spectroscopy
; priority journal
; surface area
; surface property
; two-dimensional imaging
; water pollutant
英文摘要: Microplastics, as an emerging class of pollutants has become a global concern, and is receiving increasing attention. Interestingly, microplastics are always in their ageing process when they enter the real environment. Our study investigated the ageing properties of polystyrene (PS) plastics in air, pure water and seawater environments at 75 °C. A two-dimensional (2D) Fourier transform infrared (FTIR) correlation spectroscopy (COS) analysis was used to better understand the ageing mechanism of the PS plastics. Based on the 2D-COS analysis, different ageing mechanisms were identified under different ageing conditions, such as an ageing sequence of aged-PS particle functional groups in air: 1601(C[dbnd]C) > 1050(C–O)>1453(C–H)>1493(C–H)>1375(C–OH)>1666(C[dbnd]O). Among the functional group changes, O-functional groups (C–O, C–OH and C[dbnd]O) were introduced during the ageing process. Moreover, for pristine PS particles, hydrophobicity was a major factor for the interaction between the microplastics and organic pollutants. For aged-PS particles, their adsorption capacities were significantly enhanced as the degree of ageing increased. The ageing degree of PS was highly responsible for increasing of the specific surface area and the increase in oxygen-containing surface groups. Furthermore, there was a significant enhancement in the adsorption affinity for antibiotic contaminants than for polycyclic aromatic hydrocarbon contaminants. Aged PS particles had little adsorption of polycyclic aromatic hydrocarbons, because the presence of oxygen-containing surface groups on the aged PS plastics might allow the formation of hydrogen bonds with the surrounding water molecules. Overall, a 2D-COS analysis was an effective method for understanding the ageing process of microplastics under different environmental conditions at high temperature. These results also clearly demonstrated the characteristics and mechanisms of the interaction between aged-microplastics and organic pollutants, which could be useful for understanding the environmental behavior of co-existing pollutants. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158345
Appears in Collections: 气候变化与战略
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作者单位: College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
Recommended Citation:
Ding L.,Mao R.,Ma S.,et al. High temperature depended on the ageing mechanism of microplastics under different environmental conditions and its effect on the distribution of organic pollutants[J]. Water Research,2020-01-01,174