| Summary: | The rice husk-derived hydrogel-biochar composite (HBC-RH) demonstrated significant potential for removing heavy metal pollutants from wastewater. HBC-RH is formulated from the combination of acrylamide (AAm) as a monomer with a molecular weight of 71.08g/mol, ammonium persulfate (APS) as an initiator with a molecular weight of 228.20g/mol, N.N′-methylene bisacrylamide (MBA) with a molecular weight of 154.17g/mol as a crosslinker, and rice husk as a raw material. The type of biochar used to create the HBC affects how well the sorbent works. This study aims to synthesize, characterize, and assess the effect of various influential parameters on the sorption of arsenic and zinc. The effects of adsorbent dose, starting adsorbate concentration, and contact time were examined in this inquiry to establish the best batch experimental settings. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy were used to analyze the samples’ morphology, functional groups, and elemental composition (SEM). © 2025 Elsevier Ltd. All rights reserved.
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