Surfactant-induced adsorption of Pb(II) on the cracked structure of microplastics

Jiang, Yanji; Qin, Zhiming; Jiao, Fei; Ding, Dianji; Sun, Huimin; Wang, Jun; Yin, Xianqiang

doi:10.1016/j.jcis.2022.04.068

Cited by 41 publications

(6 citation statements)

References 41 publications

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“…When the particles are less than 5 mm in diameter, these are called microplastics (MPs) [ 3 ]. MPs are widely present in a variety of environments, and their potential impact on the environment is being extensively studied [ 4 ]. The fate of MPs in the environment has been previously investigated in the literature, such as spatial distribution [ 5 ], biotoxicity [ 6 ], and transport [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Diclofenac Sodium by Aged Degradable and Non-Degradable Microplastics: Environmental Effects, Adsorption Mechanisms

Wang

Kou

et al. 2022

Toxics

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Microplastics (MPs) are novel pollutants, which can carry toxic contaminants and are released in biota and accumulate. The adsorption behavior of MPs and aged MPs has attracted extensive attention. In this paper, the aging process of polystyrene (PS) and poly (butyleneadipate-co-terephthalate) (PBAT) plastics under ultraviolet (UV) irradiation at a high temperature and their adsorption properties for the contaminant diclofenac sodium (DCF) before and after aging was investigated. There are many factors affecting the adsorption capacity of MPs. In this experiment, three aspects of MPs, organic pollutants, and environmental factors are explored. The Freundlich model as well as the pseudosecondary kinetic model is more applicable to the process of DCF adsorption by MPs. The main effects of adsorption of organic pollutants by MPs are electrostatic interactions, hydrogen-halogen bonds, and hydrophobic interactions. The adsorption capacity of the UV-aged MPs on DCF is significantly enhanced, and the order of adsorption capacity is Q(A-PBAT) (27.65 mg/g) > Q (A-PS) (23.91 mg/g) > Q (PBAT) (9.30 mg/g) > Q (PS) (9.21 mg/g). The results show that more active sites are generated on the surface of MPs after aging, which can enhance their adsorption capacity for organic pollutants. This adsorption mechanism will increase their role as contaminant carriers in the aquatic food chain.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Diclofenac Sodium by Aged Degradable and Non-Degradable Microplastics: Environmental Effects, Adsorption Mechanisms

Wang

Kou

et al. 2022

Toxics

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“…Most of these metals are transition elements of the fourth period, which have unfilled d orbitals, and have only 1 or 2 electrons in the outermost shell, thus exhibiting abundant valence electron configurations (Lu et al, 2012). Pb (II) is more active than Cu (II); the former has higher ion exchange capacity and partition coefficient, and is easier to form an outer spherical complex with the adsorption center on the surface of MPs (Jiang et al, 2022;Liu et al, 2022). The adsorption mechanism between Cd (II) and MPs is mainly the interaction between oxygen-containing functional groups (C-O and C=O) and cation-p interaction (Aghilinasrollahabadi et al, 2021).…”

Section: Influence Of Self-characters Of Tl On the Adsorptionmentioning

confidence: 99%

Sorption behavior and mechanisms of thallium to microplastics

et al. 2022

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Thallium (Tl) is a metal of high toxicity, and the problem of Tl pollution is being faced globally. However, environmental data on Tl are still scarce and its biogeochemical behaviors remain mostly unclear. Studies have revealed the potential transport of other heavy metal by microplastics (MPs), but there is no report on the interactions between Tl and MPs yet. Therefore, we studied the adsorption of Tl by the three most commonly detected MPs, i.e., polyethylene (PE), polystyrene (PS), and polypropylene (PP) in fresh and seawater. We considered the effects of particle size, pH and competitive cations on adsorption capacity. The results showed PS has the highest adsorption capacity for Tl which was mainly through surface complexation. PS showed the lowest crystallinity and had the most oxygen-containing functional groups among the studied MPs. The adsorption of Tl on PE and PP was dominated by physical adsorption. The adsorptions exhibited significant salinity and pH dependence. Dominant cations in seawater competed with Tl ions for adsorption sites on MPs. With the increase in pH, the deprotonation of the carboxyl functional groups on MPs was enhanced, which increased the effective adsorption sites and promoted the adsorption of Tl. However, the adsorption capacity of the studied MPs for Tl was much lower than the corresponding capacity of natural minerals (clay, iron and manganese oxides) previously reported. Therefore, MPs may not be the main factors affecting the environmental behavior of Tl. This study provides valuable information for the study of thallium’s environmental behavior and ecological risk assessment.

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“…1a, the intensity of the carbonyl peak of PBS increased after ageing due to the oxidation of C-H. For PP, the main characteristic peaks are around 3426 cm − 1 , 2964 cm − 1 , 1720 cm − 1 , corresponding to the functional groups -OH, -CH 3 and C = O, respectively. The peak near 738 cm − 1 is produced by the -CH 2 bending vibration (Jiang et al, 2022). The high oxygen content of original PP may be caused by plasticizers added during the production process (Yinghua et al, 2022b).…”

Section: Surface Functional Groups and Contact Anglesmentioning

confidence: 99%

Investigation of the adsorption–desorption behavior of antibiotics by polybutylene succinate and polypropylene aged in different water conditions

Fan

Alam

et al. 2022

Environ Sci Pollut Res

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Microplastics (MPs) are widely present in the aqueous environment and aged by natural components, such as salinity (SI) and dissolved organic matter (DOM). The effects of multi-conditioned ageing on the physicochemical properties and environmental behavior of MPs are not completely investigated. In this study, the degradable MPs polybutylene succinate (PBS) was used to investigate the environmental behavior of sulfamethoxazole (SMZ), and compared it with polypropylene (PP). The results showed that the single conditions of DOM and SI, particularly DOM, promoted the ageing process of MPs more signi cantly, especially for PBS. The degree of MPs ageing under multiple conditions is lower than that of under single condition. Compared to PP, PBS has a greater speci c surface area, crystallinity and hydrophilicity, so it has a stronger adsorption capacity for SMZ. The adsorption behavior of MPs tted well with the pseudo-second-order kinetic and Freundlich isotherm models, indicating a multilayer adsorption. The desorption experiments showed that the desorption amount of SMZ on MPs in simulated intestinal uid was greater than that in Milli-Q water. Both the original PBS and the aged PBS had a stronger desorption capacity than the PP. The desorption quantity of PBS was 1.23-1.84 times greater than PP, while the desorption rates were not signi cantly different. This experiment would provide a theoretical basis for assessing the ecological risks of degradable MPs in complex water conditions.

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Surfactant-induced adsorption of Pb(II) on the cracked structure of microplastics

Cited by 41 publications

References 41 publications

Adsorption of Diclofenac Sodium by Aged Degradable and Non-Degradable Microplastics: Environmental Effects, Adsorption Mechanisms

Adsorption of Diclofenac Sodium by Aged Degradable and Non-Degradable Microplastics: Environmental Effects, Adsorption Mechanisms

Sorption behavior and mechanisms of thallium to microplastics

Investigation of the adsorption–desorption behavior of antibiotics by polybutylene succinate and polypropylene aged in different water conditions

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