Adsorption of malachite green from aqueous solution by nylon microplastics: Reaction mechanism and the optimum conditions by response surface methodology

Lin, Li-Chun; Tang, Shuai; Wang, Xuesong; Sun, Xuan; Yu, Anqi

doi:10.1016/j.psep.2020.05.019

Cited by 39 publications

(9 citation statements)

References 38 publications

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“…Several types of adsorbents have been tested for their capacity to remove dyes from effluentse.g., silica gel (Andrzejewska et al 2007), alumina (Adak et al 2005), zeolites (Alver & Metin 2012) and modified chitosan (Sadiq et al 2020). With respect to MG removal, the adsorbents tested include magnetic microspheres (Pan et al 2019), microplastics (Lin et al 2020), activated carbon (Qu et al 2019) and carbon composites (Adebayo et al 2020).…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Malachite green removal using ionic flocculation

Teixeira

Melo

Fernandes

et al. 2022

Water Practice and Technology

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The use of ionic flocculation is proposed to remove malachite green (MG), in this case, from water. A surfactant with the polluted solution and calcium is added. The surfactant-calcium reaction forms a precipitate, which aggregates into flocs on agitation. The flocs adsorb MG, which can then be removed by centrifugation. Ionic flocculation was assessed by varying parameters including: surfactant and MG concentrations, electrolyte content, pH, contact time, etc. The isotherm and adsorption kinetic models that best fit this process are the Langmuir and pseudo-second order models, respectively. MG removal efficiency of 96% was obtained at pH 9, with surfactant concentration 1,400 mg L−1, MG concentration 10 mg L−1 and contact time 10 minutes. The process has potential for pollutant removal.

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Section: Graphical Abstract Introductionmentioning

confidence: 99%

Malachite green removal using ionic flocculation

Teixeira

Melo

Fernandes

et al. 2022

Water Practice and Technology

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“…However, the carotenoid content was increased with increasing pollutant concentration. The oxygen evolving complexes were damaged by Cu 2+ pollutants [143]. Furthermore, the surface binding properties of the microplastics are affected by algal species.…”

Section: Interaction Of Microplastics With Microalgaementioning

confidence: 99%

Review on the distribution of microplastics in the oceans and its impacts: Need for modeling-based approach to investigate the transport and risk of microplastic pollution

Sheela

Manimekalai

Dhinagaran

2021

Environmental Engineering Research

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Many studies have proven that microplastics are transported from the terrestrial ecosystem to the marine ecosystem. Furthermore, it has been established that a significant quantity is added to the marine ecosystem through river transport and atmospheric deposition. Though several methods exist to estimate the concentration of microplastics in the marine ecosystem, it is very difficult to precisely quantify the pollutants and determine the amount transported from the land to the ocean. The data on the extent of microplastic pollution are influenced by the sampling methods and the time of sampling. An examination of the literature reveals that only limited studies have been conducted to examine the interaction of microplastics and their additives with the marine organisms. Hence, more such studies are warranted to shed light on these interactions. Few modeling studies have been conducted to estimate the future addition of plastics to the marine ecosystem. To obtain better output, appropriate models that consider the current scenario need to be developed. Models help us to understand the sources, transport, sinks, and risks of microplastic pollution. This will enable us to develop appropriate strategies and, measures to reduce plastic littering in the environment, thus marine plastic pollution is minimized in the future.

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“…The inevitable interaction between dyes and MPs will lead to more complex environmental behavior. Although Lin et al (2020) explored the interaction mechanism and optimal conditions for nylon plastic to adsorb MG, and You et al explored and found that the aging PE had a better adsorption effect on methylene blue compared with the original plastic (You et al 2021). The adsorption of single dyes on MPs is not enough to explain the real situation in the environment.…”

Section: Introductionmentioning

confidence: 99%

Competition adsorption of malachite green and rhodamine B on polyethylene and polyvinyl chloride microplastics in aqueous environment

Zhong

Wang

Guo

et al. 2022

Water Science and Technology

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Microplastics (MPs) will cause compound pollution by combining with organic pollutants in the aqueous environment. It is important for environmental protection to study the adsorption mechanism of different MPs for pollutants. In this study, the adsorption behaviors of malachite green (MG) and rhodamine B (RhB) on polyethylene (PE) and polyvinyl chloride (PVC) were studied in single systems and binary systems, separately. The results show that in single system, the adsorptions of between MPs for pollutants (MG and RhB) are more consistent with the pseudo-second-order kinetics and Freundlich isotherm model, the adsorption capacity of both MPs for MG is greater than that of RhB. The adsorption capacities of MG and RhB were 7.68 mg/g and 2.83 mg/g for PVC, 4.52 mg/g and 1.27 mg/g for PE. In the binary system, there exist competitive adsorption between MG and RhB on MPs. And the adsorption capacities of PVC for the two dyes are stronger than those of PE. This is attributed to the strong halogen-hydrogen bond between the two dyes and PVC, and the larger specific surface area of PVC. This study revealed the interaction and competitive adsorption mechanism between binary dyes and MPs, which is of great significance for understanding the interactions between dyes and MPs in the multi-component systems.

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Adsorption of malachite green from aqueous solution by nylon microplastics: Reaction mechanism and the optimum conditions by response surface methodology

Cited by 39 publications

References 38 publications

Malachite green removal using ionic flocculation

Malachite green removal using ionic flocculation

Review on the distribution of microplastics in the oceans and its impacts: Need for modeling-based approach to investigate the transport and risk of microplastic pollution

Competition adsorption of malachite green and rhodamine B on polyethylene and polyvinyl chloride microplastics in aqueous environment

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