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Silica Functionalized Almond Gum Derivatives for Integrated Flocculation Cycles for Natural and Synthetic Water Systems

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Abstract

Natural gum-based flocculants are prevalent for water treatment, still their efficiency can be improved by the incorporation of eco-friendly inorganic fillers. Such inorganic–organic-based hybrid materials need to be explored more in natural and synthetic water systems for their proof of concept and related applications. Hybrid almond gum (Amg) grafted polyacrylamide/silica-based composite (Amg-g-PAM/SiO2) was synthesized and assessed as a flocculant for natural and synthetic water systems. The synthesis was characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM), Energy dispersive X-ray spectroscopy (EDS), Thermogravimetric analysis (TGA), Differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS) to study the chemical, structural, thermal, and surface properties. The synthesized grades of Amg-g-PAM and Amg-g-PAM/SiO2 were tested for their flocculation performance in kaolin, iron ore and MWCNT suspensions. pH and temperature variations, zeta potential measurements were studied on neutral kaolin suspension. The best flocculation efficiency was observed to be 98%, 96%, 95% and 92% in MWCNT, kaolin, iron ore suspensions and river water respectively at pH 4 and 25 °C. Overall, Amg-g-PAM/SiO2 flocculant possesses unique characteristics of conventional branched graft copolymers which increases easy approachability towards suspended particles while its inorganic counterpart enhances adsorption. Thus, this hybrid flocculant is better than any of its individual inorganic or organic counterparts in terms of flocculation efficacy.

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Acknowledgements

The work is financially supported by the Science and Engineering Research Board (SERB) core research grant (CRG/2021/007402). Munmun Choudhary acknowledge Birla Institute of Technology, Mesra, Ranchi for Institute Research Fellowship. The authors thank Dr. K. Jayaram Kumar, Professor, Pharmaceutical Sciences and Tech, BIT Mesra for support in molecular weight determination. The authors would like to thank Jyoti Prabha Kujur, IIT(ISM), Dhanbad for help in XPS analysis. We would also thank the Central Instrumentation Facility (C.I.F), BIT, Mesra for the characterization of samples.

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  1. Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, 835215, India

    Munmun Choudhary & Sumit Mishra

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  1. Munmun Choudhary
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Munmun Choudhary: Conducting Experiment, Writing Manuscript Draft. Dr. Sumit Mishra: Conceiving Research, Manuscript Correction.

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Choudhary, M., Mishra, S. Silica Functionalized Almond Gum Derivatives for Integrated Flocculation Cycles for Natural and Synthetic Water Systems. J Polym Environ (2024). https://doi.org/10.1007/s10924-024-03299-1

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