简便合成 Fe 改性木质素基生物炭用于超快速吸附亚甲基蓝：选择性吸附及机理研究。
Facile synthesis of Fe-modified lignin-based biochar for ultra-fast adsorption of methylene blue: Selective adsorption and mechanism studies.
机构信息
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an 710054, China; Department of Environmental Engineering, School of Water and Environment, Chang'an University, Xi'an 710054, China.
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Water and Environment, Chang'an University, Xi'an 710054, China; Department of Environmental Engineering, School of Water and Environment, Chang'an University, Xi'an 710054, China.
出版信息
Bioresour Technol. 2022 Jan;344(Pt A):126186. doi: 10.1016/j.biortech.2021.126186. Epub 2021 Oct 25.
A novel Fe-modified lignin-based biochar (Fe-LB) was fabricated via a facile one-step carbonization method for methylene blue (MB) removal from wastewater. Fe-LB exhibited a high specific surface area (885.97 m/g) and micropore volume (0.3203 m/g), and demonstrated high affinity for MB with the maximum adsorption capacity of 2.7-fold by Fe-LB than LB. It was found that quick adsorption could be achieved in 15 min with the MB removal efficiency of 100% and adsorption capacity reached 200 mg/g. Selective adsorption studies indicated that Fe-LB preferentially adsorbed MB in high salt and multiple dye systems (binary, ternary, and quaternary) over a wide pH range from 2 to 12. The removal efficiency of CR was greatly improved due to the synergistic effect between MB and CR in the binary system. This work demonstrated that Fe-LB can effectively remove dye contaminants and possessed great potential in the treatment of MB polluted dye wastewater.
一种新型的 Fe 修饰木质素基生物炭（Fe-LB）通过简便的一步碳化法制备，用于从废水中去除亚甲基蓝（MB）。Fe-LB 具有高比表面积（885.97 m/g）和微孔体积（0.3203 m/g），对 MB 表现出高亲和力，最大吸附容量是 LB 的 2.7 倍。研究发现，在 15 分钟内即可实现快速吸附，MB 的去除效率达到 100%，吸附容量达到 200 mg/g。选择性吸附研究表明，Fe-LB 在从 2 到 12 的宽 pH 范围内的高盐和多种染料体系（二元、三元和四元）中优先吸附 MB。在二元体系中，MB 和 CR 之间的协同作用极大地提高了 CR 的去除效率。这项工作表明，Fe-LB 可以有效地去除染料污染物，在处理 MB 污染的染料废水中具有很大的潜力。
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