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There is a growing trend to employ agricultural waste/by-products (AWBs) as the substrates for the development of dye bio-sorbents,and surface modification plays a vital role in improving dye sorption’s property of raw AWBs.However,it is an interesting but challenging task to develop a facile and cost-effective procedure for the making of bio-adsorbents for environmental applications.Herein,low-temperature solution-carbonized rice husk (RH-c) and β-cyclodextrins (β-cd) were synergically combined to prepare a new kind of bioadsorbent,i.e.RH-c/cd,and applied for the adsorption of Rhodamine B from aqueous solution.The surface chemistry was investigated using Fourier transform infrared spectroscopy (FT-IR).Equilibrium adsorption data were fitted to Langmuir and Freundlich models and data are more consistent with the Langmuir isotherm equation than the Freundlich model.The maximum monolayer capacity obtained from the Langmuir isotherm was 176.9 mg/g for RH-c/cd.The adsorption test suggested that resulting RH-c/cd is a promising bioadsorbent for dye molecules removal from aqueous system.