Advances in Modified Wood-Based Adsorbents for Contaminant Removal: Valorization Methods, Modification Mechanisms, and Environmental Applications

IF 9 1区 农林科学 Q1 FORESTRY Current Forestry Reports Pub Date : 2023-09-26 DOI:10.1007/s40725-023-00200-6
Mina Keshvardoostchokami, Flavia Lega Braghiroli, Carmen Mihaela Neculita, Ahmed Koubaa
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Abstract

Purpose of Review

Wood-based adsorbents are increasingly used for environmental applications. They demonstrate considerable advantages, including renewable feedstock, relatively simple preparation processes, and advantageous structural and surface properties. In short, they provide environmentally friendly, effective, and economical sources for contaminant removal. This review summarizes recent advances in the preparation and use of selected modified wood-based residues (biochar, ash, and cellulose) as adsorbents for environmental applications (water, air, and soil remediation).

Recent Findings

Although chemical modifications have produced better results for wood-based adsorbents, the inherent corrosion problems and safety issues have made physical modifications more feasible on an industrial scale. For environmental remediation, inorganic contaminants can be removed by raw and modified wood-based adsorbents, mainly via electrostatic interaction, surface complexation, pore filling, and ion exchange. Organic contaminants are removed via van der Waals forces between unsaturated polycyclic molecules, pore filling, and hydrogen bonding. Specific surface area and porosity are critical parameters for effective contaminant adsorption, mostly from water and air. A comparison of wood-based residues used for wastewater treatment ranked the efficiency as ash > cellulose > biochar versus cellulose > biochar > ash for air remediation. Adding modified wood residues to soil enhances the fertility and biological characteristics in addition to remediation. Moreover, spent wood-based adsorbents can be used in construction materials, soil fertilizers, and catalysts.

Summary

This review summarizes classical and new physical and chemical methods for modifying wood adsorbents and the impacts on physiochemical characteristics such as porosity, pore volume, surface area, and surface functional groups. Also addressed are the adsorption capacity and efficiency of raw and modified wood adsorbents for removing contaminants from synthetic effluents, mine water, air, and soil. Valorization methods for spent modified wood-based adsorbents are then outlined. Suggestions and prospects are given for future studies on environmental decontamination by wood residues.

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改性木基吸附剂的污染物去除研究进展:增值方法、改性机理和环境应用
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来源期刊
Current Forestry Reports
Current Forestry Reports Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
15.90
自引率
2.10%
发文量
22
期刊介绍: Current Forestry Reports features in-depth review articles written by global experts on significant advancements in forestry. Its goal is to provide clear, insightful, and balanced contributions that highlight and summarize important topics for forestry researchers and managers. To achieve this, the journal appoints international authorities as Section Editors in various key subject areas like physiological processes, tree genetics, forest management, remote sensing, and wood structure and function. These Section Editors select topics for which leading experts contribute comprehensive review articles that focus on new developments and recently published papers of great importance. Moreover, an international Editorial Board evaluates the yearly table of contents, suggests articles of special interest to their specific country or region, and ensures that the topics are up-to-date and include emerging research.
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