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Recent advances in conducting polymer-based magnetic nanosorbents for dyes and heavy metal removal: fabrication, applications, and perspective

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Abstract

Globally, treating and disposing of industrial pollutants is a techno-economic challenge. Industries’ large production of harmful heavy metal ions (HMIs) and dyes and inappropriate disposal worsen water contamination. Much attention is required on the development of efficient and cost-effective technologies and approaches for removing toxic HMIs and dyes from wastewater as they pose a severe threat to public health and aquatic ecosystems. Due to the proven superiority of adsorption over other alternative methods, various nanosorbents have been developed for the efficient removal of HMIs and dyes from wastewater and aqueous solutions. Being a good adsorbent, conducting polymer-based magnetic nanocomposites (CP-MNCPs) has drawn more attention for HMIs and dye removal. Conductive polymers’ pH-responsiveness makes CP-MNCP ideal for wastewater treatment. The composite material absorbed dyes and/or HMIs from contaminated water could be removed by changing the pH. Here, we review the production strategies and applications of CP-MNCPs for HMIs and dye removal. The review also sheds light on the adsorption mechanism, adsorption efficiency, kinetic and adsorption models, and regeneration capacity of the various CP-MNCPs. To date, various modifications to conducting polymers (CPs) have been explored to improve the adsorption properties. It is evident from the literature survey that the combination of SiO2, graphene oxide (GO), and multi-walled carbon nanotubes (MWCNTs) with CPs-MNCPs enhances the adsorption capacity of nanocomposites to a large extent, so future research should lean toward the development of cost-effective hybrid CPs-nanocomposites.

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Abbreviations

HMIs:

Heavy metal ions

MNCPs:

Magnetic nanocomposites

PPy:

Polypyrrole

PANI:

Polyaniline

PTh:

Polythiophene

CL:

Coral like

MO:

Methyl orange

CV:

Crystal violet

BB3:

Basic blue 3

AB40:

Acid blue 40

MG:

Malachite green

ARS:

Alizarin red S

RHB:

Rhodamine B

IC:

Indigo carmine

CR:

Congo red

TCH:

Tetracycline hydrochloride

AF:

Acid fuchsin

MB:

Methyl blue

JG:

Janus green

FB:

Fuchsin basic

PS:

Polystyrene

CS:

Chitosan

GS:

Graphene

CBZ:

Carbamazepine

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All authors contributed to the study’s conception and design. Data collection and analysis were performed by Abhishek Srivastava, Madhav Krishna Goswami, Rajeev Kumar Dohare, Anjani Kumar Tiwari, and Anupam Srivastava. The first draft of the manuscript was written by Abhishek Srivastava, Madhav Krishna Goswami, Rajeev Kumar Dohare, Anjani Kumar Tiwari, and Anupam Srivastava, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Abhishek Srivastava.

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Goswami, M.K., Srivastava, A., Dohare, R.K. et al. Recent advances in conducting polymer-based magnetic nanosorbents for dyes and heavy metal removal: fabrication, applications, and perspective. Environ Sci Pollut Res 30, 73031–73060 (2023). https://doi.org/10.1007/s11356-023-27458-4

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  • DOI: https://doi.org/10.1007/s11356-023-27458-4

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