Cellulose-based materials and their adsorptive removal efficiency for dyes: A review

Dyes are emerging as harmful pollutants, which is one of major issues for the environmentalists and there is a urgent need for the removal of dyes from the effluents. In this context, the adsorption technology has been extensively used as an effective tool for the removal of dyes from the aqueous phase. This technique uses low-cost adsorbents and the cellulosic material is a biodegradable, cost-effective and renewable polymer, which is not soluble in the majority of solvents because of its crystalline nature and hydrogen bonding. Currently, the modified cellulosic materials for the removal of dyes from wastewater gained much attention. Moreover, the application of cellulose for water treatment can be utilized for controlling pollution and have high economic viability and availability. This review signifies the use of cellulose-based adsorbent for dyes adsorption from wastewater. The key advancement in the preparation and modification of cellulose-based adsorbents is discussed and their adsorption efficiencies are compared with other adsorbents for removal of dyes and adsorption con-ditions are also considered for the same. The studies reporting cellulose-based adsorption from 2003 to 2022 are included and their various properties are compared for the efficient removal of dyes. The modified cellulosic materials cellulose is a highly effective adsorbent for the remediation of effluents.

Automated summary

Dyes are emerging as harmful pollutants, and there is an urgent need for their removal from wastewater. Adsorption technology using cellulose-based materials has been extensively studied and found to be effective in dye removal. This review discusses the preparation and modification of cellulose-based adsorbents, compares their efficiency with other adsorbents, and considers the adsorption conditions. Studies from 2003 to 2022 on cellulose-based adsorption are included, and the properties of different cellulose materials for efficient dye removal are compared. Modified cellulosic materials are highly effective adsorbents for wastewater remediation.