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Dual-functional marine algal carbon-based materials with highly efficient dye removal and disinfection control

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Abstract

The design and simple, green preparation of dual-functional materials for the decontamination of both hazardous dyes and pathogenic microorganisms from wastewater remain challenging currently. Herein, a promising marine algal carbon-based material (named C-SA/SP) with both highly efficient dye adsorptive and antibacterial properties was fabricated based on the incorporation of sodium alginate and a low dose of silver phosphate via a facile and eco-friendly approach. The structure, removal of malachite green (MG) and congo red (CR), and their antibacterial performance were studied, and the adsorption mechanism was further interpreted by the statistical physics models, besides the classic models. The results show that the maximum simulated adsorption capacity for MG reached 2798.27 mg/g, and its minimal inhibit concentration for Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) was 0.4 mg/mL and 0.2 mg/mL, respectively. The mechanistic study suggests that silver phosphate exerted the effects of catalytic carbon formation and pore formation, while reducing the electronegativity of the material as well, thus improving its dye adsorptive performance. Moreover, the MG adsorption onto C-SA/SP showed vertical orientation and a multi-molecular way, and its adsorption sites were involved in the adsorption process with the increase of temperature. Overall, the study indicates that the as-made dual-functional materials have good applied prospects for water remediation.

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The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This work was supported by the National Natural Science Foundation of China (grant number 52173203) and the State Key Laboratory of Bio–Fibers and Eco–Textiles (Qingdao University, grant number ZKT20).

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All persons who meet authorship criteria are listed as authors, and all authors certify that they have participated sufficiently in the work to take public responsibility for the content, including participation in the concept, design, analysis, writing, or revision of the manuscript. Conception and design of the study: QunLi, Zichao Li; acquisition of data: Ruitao Dong; analysis and/or interpretation of data: Ruitao Dong; Han**g Xue; Xuemei Wang; revising the manuscript critically for important intellectual content: Qun Li; Zichao Li; development and analysis of advanced statistical models: Moaaz K. Seliemb; Mohamed Mobarak.

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Correspondence to Zichao Li.

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Highlights

• A new bifunctional material was synthesized via an in situ green method.

• The adsorption capacity of MG dye by C-SA/SP reached 2798.27 mg/g.

• C-SA/SP exhibited excellent inhibitory performance against both E. coli and S. aureus.

• Classical and statistical physics models were both applied to elucidate the adsorption mechanism.

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Dong, R., Seliem, M.K., Mobarak, M. et al. Dual-functional marine algal carbon-based materials with highly efficient dye removal and disinfection control. Environ Sci Pollut Res 30, 60399–60417 (2023). https://doi.org/10.1007/s11356-023-26800-0

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  • DOI: https://doi.org/10.1007/s11356-023-26800-0

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