Luo Qiong, Chen Dingxiang, Cui Ting, Duan Ran, Wen Yi, Deng Fang, Li Lifang, Wang Huabin, Zhang Yong, Xu Rui
School of Energy and Environment Science, Yunnan Normal University, Kunming, China.
Yunnan Key Laboratory of Rural Energy Engineering, Kunming, China.
Front Bioeng Biotechnol. 2022 Nov 14;10:1054801. doi: 10.3389/fbioe.2022.1054801. eCollection 2022.
Cost-effectively improving the performance of biochar is essential for its large-scale practical application. In this work, the agro-industrial by-products copper slag and tobacco straw were employed for the preparation of modified biochar (CSBC). The obtained CSBC exhibited satisfactory capacity on Se(IV) immobilization of 190.53 mg/g, with surface interactions determined by the monolayer and mainly chemisorption. The removal mechanisms included chemical reduction, electrostatic attraction, co-precipitation, and formation of complexations. Interestingly, the existence of CuSe structure after adsorption indicated the involvement of Cu species within Se(IV) elimination. Moreover, the industrial agricultural practicality of CSBC was evaluated by regeneration tests, economic assessment, and pot experiments. The results demonstrate that iron species-modified biochar prepared from two agro-industrial by-products is a promising and feasible candidate for selenite removal from wastewater.
以具有成本效益的方式提高生物炭的性能对其大规模实际应用至关重要。在这项工作中，利用农业工业副产品铜渣和烟草秸秆制备了改性生物炭（CSBC）。所获得的CSBC对Se(IV)的固定容量令人满意，为190.53 mg/g，其表面相互作用由单层决定且主要为化学吸附。去除机制包括化学还原、静电吸引、共沉淀以及络合物的形成。有趣的是，吸附后CuSe结构的存在表明Cu物种参与了Se(IV)的去除。此外，通过再生试验、经济评估和盆栽试验对CSBC的工业农业实用性进行了评估。结果表明，由两种农业工业副产品制备的铁物种改性生物炭是从废水中去除亚硒酸盐的一种有前景且可行的候选材料。
