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Arsenic adsorbent derived from the ferromanganese slag

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Abstract

Arsenic-contaminated groundwater has a severe negative impact on the health of living beings. Groundwater majorly contains arsenite (As(III)) as well as arsenate (As(V)). Among these two, the arsenite species are more carcinogenic, mobile, and lethal. Hence, it is more difficult to remove by conventional water treatment methods. Ferromanganese slag, waste generated from steel industries, has been utilized in this study for the development of arsenic adsorbent. A chemical treatment method is applied to the ferromanganese slag to prepare efficient arsenic adsorbent, and it is easy to scale up. An adsorbent with the capacity for simultaneous oxidation of As(III) and adsorption of total arsenic species can be efficient for arsenic decontamination. X-ray photoelectron spectroscopy and X-ray absorption near edge spectra techniques prove the As(III) oxidation capability of the developed material is about 70 ± 5% based on initial As(III) concentration. The adsorbent not only oxidizes the As(III) species but also adsorbs both the arsenic species. The Langmuir isotherm model estimates the maximum adsorption capacities at the equilibrium concentration of 10 μg/L are 1.010 ± 0.004 mg/g and 1.614 ± 0.006 mg/g for As(III) and As(V), respectively. The rate of adsorption of As(III) was higher compared to the As(V), which was confirmed by the pseudo-second-order kinetic model. Therefore, the treated water quality meets the World Health Organization and Indian drinking water standards.

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Data availability

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

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Acknowledgments

We would like to acknowledge the MHRD, Government of India, and the Department of Science and Technology (DST), Ministry of Science and Technology, India, for the funding through IMPRINT 2A project scheme (project file number IMP/2018/001228). We heartily acknowledge Mr. Ashok Yadav and Dr. S.N. Jha of RRCAT, Indore, for giving us the valuable time to access the Beamline BL-9 for the experimental purpose.

Funding

The funding agencies of this study are MHRD, Government of India, and Department of Science and Technology (DST), Ministry of Science and Technology, India, through the IMPRINT 2A project scheme (project file number IMP/2018/001228).

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Mr. Nishant Jain: data curation, validation, format analysis, investigation, writing—original draft

Dr. Abhijit Maiti: conceptualization; validation; methodology; investigation; resources; funding acquisition; writing—review and editing; visualization; project administration; supervision

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Correspondence to Abhijit Maiti.

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The authors declare that they have no competing interests.

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Responsible Editor: Ioannis A. Katsoyiannis

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Jain, N., Maiti, A. Arsenic adsorbent derived from the ferromanganese slag. Environ Sci Pollut Res 28, 3230–3242 (2021). https://doi.org/10.1007/s11356-020-10745-9

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  • DOI: https://doi.org/10.1007/s11356-020-10745-9

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