One-pot synthesis of iron oxides decorated bamboo hydrochar for lead and copper flash removal

吸附 吸附 化学 热稳定性 化学工程 竹子 核化学 材料科学 有机化学 复合材料 工程类
作者
Xiaohong Hu,Linxin Dai,Qianli Ma,Jianying Xu,Jianfeng Ma,Xing’e Liu
出处
期刊:Industrial Crops and Products [Elsevier BV]
卷期号:187: 115396-115396 被引量:10
标识
DOI:10.1016/j.indcrop.2022.115396
摘要

A novel one-pot codeposition strategy was developed by employing bamboo hydrochar as precursors to fabricate magnetic porous char (MPC) with Fe 3 O 4 or α-Fe loading. The synthesized MPC with well dispersed magnetic phase and high thermal stability displayed excellent adsorption capacities and flash adsorption rate for Cu(II) and Pb(II). The batch sorption experiments showed that MPC had the best performance with Langmuir adsorption capacities as high as 125.06 mg/g for Cu(Ⅱ) and 153.85 mg/g for Pb(Ⅱ), respectively. More importantly, the short time of adsorption reaching 90 % equilibrium within 10 min was considerably beyond previous study. Also, a synergistic mechanism of the chemical complexation and physical adsorption for the higher adsorption capabilities and flash removal rate of the synthesized MPC was proposed. The regeneration investigation revealed that the sorption efficiencies remained at high level with above 92.4 % for Cu(II) and 94.1 % for Pb(II) after five cycles. Thus, the MPC were expected to be a promising candidate for high-efficient and rapid removal of heavy metal contaminants from wastewater in future practical utilization . • Highly porous and thermal stable magnetic biochar were synthesized by one-pot method. • The adsorption capacities were 125.06 mg/g for Cu(Ⅱ) and 153.85 mg/g for Pb(Ⅱ), respectively. • The adsorption reached 90 % of the adsorption equilibrium within 10 min. • The sorption efficiencies of regeneration remained above 92.4 % for Cu(II) and 94.1 % for Pb(II) after five cycles.
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