Preparation of cellulose gel extracted from rice straw and its application for metal ion removal from aqueous solutions

Rice straw waste was used to extract natural cellulose fibers, which was then chemically converted to cellulose gel. Both extracted cellulose and modified cellulose (gel) were characterized using different techniques and used for biosorption of b+arium, manganese, cobalt, nickel, copper, zinc, and cadmium. Both celluloses' chemical compositions were investigated. The FT-IR, XRD, TEM, and SEM results all support the success of the proposed chemical modification. Because of the increase in pore size within the gel composition, the metal sorption capability of the final chelating material (gel) was greater than that of extracted cellulose. The experimental data were fit to the sorption isotherm models of Langmuir, Freundlich, and Temkin. This new modified biopolymer's behaviour suggested that it could be used as a promising sorbent for cation removal from polluted dye baths and waste water. Furthermore, this modified cellulose was prepared as cheap material extracted from the rise waste which helping in protection of the environment and it was confirm excellent behaviour in the removal heavy metals from their aqueous solution compared to the previous materials reported before.

Automated summary

Rice straw waste was used to extract natural cellulose fibers, which were chemically converted to cellulose gel. Both extracted cellulose and modified cellulose (gel) were characterized and used for biosorption of heavy metals. The results showed that the modified cellulose gel had greater metal sorption capability than extracted cellulose. The new modified biopolymer exhibited promising behavior as a sorbent for cation removal and was prepared from cheap material extracted from rice waste.