摘要：

Environmental contamination due to anthropogenic and natural sources is increasing day by day because of increase in population, industrialization and urbanization. Arsenic species released into the environment tend to persist indefinitely, circulating and eventually accumulating throughout the food chain, thus becoming a serious threat to the environment. The present study explores the preparation of nanocrystalline cellulose (NCC) from microcrystalline cellulose (MCC) in removing arsenic ions. An investigation was undertaken regarding the adsorption of arsenic ions from aqueous solutions using functionalization onto NCC; Aminated NCC. Novel NCC was characterized on the basis of XRD, SEM and AFM. Aminated NCC was characterized on the basis of FTIR and TGA techniques and found to have enough potential for sorption of arsenic. Batch studies were carried out to characterize As (III) and As (V) removal capability of NCC and Aminated NCC. The different factors affecting arsenic ions adsorption on this substrate such as arsenic ion concentration, pH of the medium, treatment time and as well as biosorbent doses were studied. It was found from the obtained results that; the adsorption % increased with (a) increasing the arsenic ions concentration up to 25 μg/mL then levels off, (b) increasing the pH value within the studied range (2-10), (c) increasing the treatment time up to 40 min then levels off and (d) increasing the extent of biosorbent within the range studied (0.25-2.0 g). The findings showed that aminated NCC can easily be Shalini Srivastava et al 662 envisaged as a new, vibrant, environmental friendly, low-cost biosorbent for arsenic clean-up operations.

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