Husbandry waste derived coralline-like composite biomass material for efficient heavy metal ions removal.
Husbandry waste derived coralline-like composite biomass material for efficient heavy metal ions removal.
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DOI：
10.1016/j.biortech.2021.125408
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发表时间：
2021-06
影响因子：
11.4
通讯作者：
Yanchen Zhu;Xin Wang;Zilong Li;Yunxia Fan;Xujing Zhang;Jian Chen;Yali Zhang;Cuihua Dong;Yi Zhu
中科院分区：
文献类型：
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作者：
Yanchen Zhu;Xin Wang;Zilong Li;Yunxia Fan;Xujing Zhang;Jian Chen;Yali Zhang;Cuihua Dong;Yi Zhu
生物固体废弃物的资源化利用是实现环境修复的关键。通过综合利用LiBr处理和多巴胺化学，本文成功地将牛粪废弃物转化为复合生物质材料，用于高效去除重金属离子。在LiBr处理过程中发现了纤维素的选择性刻蚀机理，实现了比表面积提高百倍的珊瑚状多孔生物质材料的规模化制备。由于聚乙烯亚胺和Fe 3 O 4的共沉淀作用，所制备的材料对Cu 2+和Cd 2+的吸附容量分别为183.82和231.48 mg·g-1，显著高于牛粪对Cu 2+和Cd 2+的吸附容量（分别为0.95和1.25 mg·g-1）。此外，该复合吸附剂还具有快速吸附平衡、磁分离能力、单层化学吸附特性和回收利用的可行性。本研究为畜牧业固体废弃物的资源化利用和新型生物质吸附剂的开发提供了理论依据。
The resource utilization of biological solid waste is crucial for practical environmental remediation. By comprehensively utilizing LiBr treatment and dopamine chemistry, herein the cow dung waste was successfully converted into the composite biomass material for efficient heavy metal ions removal. A selective etching mechanism of cellulose was discovered in the LiBr treatment process, achieving the large-scale preparation of coralline-like porous biomass material with hundred times increased specific surface. Benefiting from the co-deposition of polyethyleneimine and Fe3O4, the fabricated material showed significantly higher adsorption capacity (183.82 and 231.48 mg·g−1for Cu2+and Cd2+) than that of raw cow dung (0.95 and 1.25 mg·g−1for Cu2+and Cd2+). Furthermore, this composite biomass adsorbent also exhibited rapid adsorption equilibrium, magnetic separation capability, monolayer chemisorption feature and feasible recycling use. Collectively, this work contributes to both the resource utilization of husbandry solid waste and the development of advanced biomass adsorbent.