Abstract: Cellulose, which is the most widely found natural polymer material, has attracted significant attention in the fields of energy, environment and materials science. Nanocellulose-based heavy metal adsorbent materials, which are prepared by combining renewable biomass materials with nanotechnology, are degradable, regeneratable and environmentally friendly. In addition, they show high adsorption capacity and selective adsorption. Therefore, their synthesis has attracted significant research attention for heavy metal treatment technology. However, for natural nanocellulose, a large number of hydrogen bonds are formed by hydroxyl groups in aqueous media, which reduce the adsorption and specific adsorption capacities of the material. Therefore, active groups or metal oxides are introduced during the preparation of nanocellulose-based adsorbent materials through chemical modification and enzymatic treatment, among other methods, to improve the dispersion, specific adsorption performance, and adsorption capacity of the materials. In contrast, high-performance composites can be obtained by compounding natural nanocellulose with natural minerals, organic materials, and graphene oxide. The chemical modification of nanocellulose materials has been investigated extensively; however, the enzymatic treatment has not been investigated in detail yet. Specifically, the limited stu-dies so far have focused on the reaction processes and products of specific enzymatic treatments; however, there is a lack of studies focusing on multiple adaptations and engineering applicability analysis. In practical applications, nanocellulose is often directly made into powder adsorbents; however, it is also prepared as gel, hybrid, or composite materials. In some cases, it is further processed into water purification materials, such as nanofiltration membranes, filter papers, and filters. This paper briefly introduces the latest research progress in the field of nanocellulose-based heavy metal adsorbent materials from the viewpoints of preparation technology, adsorption mechanism, modification enhancement, and application form. This paper focuses on the modification mechanisms, process paths, and application performances of chemical modification and enzymatic treatment of nanocellulose-based adsorbent materials, and it analyzes the common application forms of these materials. Finally, based on the current status of research, this paper discusses the development trend of nanocellulose-based heavy metal adsorbent materials for the treatment of wastewater containing heavy metals to provide references for their applications for heavy metal removal.
通讯作者:
*荆肇乾,南京林业大学土木工程学院教授、博士研究生导师。1997年获得山东建筑大学给水排水专业学士学位,于2003年、2006年分别获得东南大学环境工程专业硕士学位、博士学位。2012—2013年,任日本东北大学客员研究员。以第一作者/通信作者在Bioresource Technology、Science of the Total Environment、《环境科学学报》等国内外学术期刊上发表论文100余篇。主要从事水污染控制理论与技术研究。zqjing@njfu.edu.cn
陶正凯, 荆肇乾, 王郑. 纳米纤维素材料在重金属废水治理中的应用[J]. 材料导报, 2023, 37(6): 21030120-8.
TAO Zhengkai, JING Zhaoqian, WANG Zheng. Application of Nanocellulose Materials for the Treatment of Wastewater Containing Heavy Metals. Materials Reports, 2023, 37(6): 21030120-8.
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