4.7 Review

Recent advances and future perspective on lignocellulose-based materials as adsorbents in diverse water treatment applications

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ELSEVIER
DOI: 10.1016/j.ijbiomac.2023.126984

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Lignocellulose; Modification; Pollutants; Adsorption; Water treatment

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The review discusses the latest research advances in lignocellulose-based adsorbents, focusing on lignocellulosic composition, material modification, and application of adsorbents. It systematically and comprehensively presents the modification and preparation methods of lignin, cellulose, and hemicellulose, as well as their applications in treating various contaminated waters. Additionally, it provides detailed descriptions of adsorption models, mechanisms, and regeneration techniques, offering valuable insights into understanding adsorption mechanisms and recycling of adsorbents.
The growing shortage of non-renewable resources and the burden of toxic pollutants in water have gradually become stumbling blocks in the path of sustainable human development. To this end, there has been great interest in finding renewable and environmentally friendly materials to promote environmental sustainability and combat harmful pollutants in wastewater. Of the many options, lignocellulose, as an abundant, biocompatible and renewable material, is the most attractive candidate for water remediation due to the unique physical and chemical properties of its constituents. Herein, we review the latest research advances in lignocellulose-based adsorbents, focusing on lignocellulosic composition, material modification, application of adsorbents. The modification and preparation methods of lignin, cellulose and hemicellulose and their applications in the treatment of diverse contaminated water are systematically and comprehensively presented. Also, the detailed description of the adsorption model, the adsorption mechanism and the adsorbent regeneration technique pro-vides an excellent reference for understanding the underlying adsorption mechanism and the adsorbent recy-cling. Finally, the challenges and limitations of lignocellulosic adsorbents are evaluated from a practical application perspective, and future developments in the related field are discussed. In summary, this review offers rational insights to develop lignocellulose-based environmentally-friendly reactive materials for the removal of hazardous aquatic contaminants.

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