▎ 摘　　要

Novel approach to develop a biomass derived lignin-cellulose based, ultra-light, hydrophobic graphene supported spongy composite was synthesized to absorb oil and organic solvents from wastewater. Spongy composite was synthesized by a facile and highly efficient one-pot hydrothermal method from the natural precursor. Lignin-cellulose functionalized graphene (LCG) sponge was synthesized from graphene oxide (GO) and sugarcane waste powder (SCwP) in presence of natural latex. LCG successfully demonstrated separation of oil from oil-water mixture. LCG has high oil sorption capacity in the range of 25-50 g of oil per gram of sorbent. This material showed high efficiency as a sorbent to separate organic chemicals from wastewater. The absorption capacity of LCG sponge was enhanced thrice in comparison with SCwP and could be reused up to 10 cycles. The continuous oil water separation process was demonstrated using LCG sponge from the oil-water mixture, which can be applied for large scale oil recovery from the waste stream.