使用碳酸钾改性的木髓菝葜生物炭高效去除刚果红和亚甲基蓝。

Efficient removal of Congo red and methylene blue using biochar from Medulla Tetrapanacis modified by potassium carbonate.

机构信息

School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, China.

出版信息

Bioresour Technol. 2023 May;376:128912. doi: 10.1016/j.biortech.2023.128912. Epub 2023 Mar 17.

DOI:10.1016/j.biortech.2023.128912

Abstract

Biochar (BC) prepared from Medulla Tetrapanacis was recognized as having potential in environmental remediation because of its porous texture, abundant chemical surface groups and mineral composition. In this study, a novel modified biochar (KBC) derived from Medulla Tetrapanacis achieved efficient adsorption of Congo red (CR) and methylene blue (MB). Characterization results suggested that the modification had little effect on the group distribution of KBC, but a dramatic expansion of specific surface area was observed on KBC (1180.45 m/g) compared to BC (198.51 m/g). KBC exhibited a maximum sorption of 584.17 mg/g for CR and 318.01 mg/g for MB. Kinetic and isotherm studies revealed sorption of CR and MB by KBC was chemosorption, which occurred on the monolayer surface. The comprehensive analysis also provided the basis for the application of KBC to practical production. These outcomes suggested that KBC may become a new option for the effluent treatment.

摘要

由木髓制备的生物炭（BC）因其多孔质地、丰富的化学表面基团和矿物组成而被认为在环境修复方面具有潜力。在这项研究中，一种新型的改性生物炭（KBC）源自木髓，实现了对刚果红（CR）和亚甲基蓝（MB）的有效吸附。表征结果表明，改性对 KBC 的基团分布影响不大，但与 BC（198.51 m/g）相比，KBC 的比表面积显著扩大（1180.45 m/g）。KBC 对 CR 的最大吸附量为 584.17 mg/g，对 MB 的最大吸附量为 318.01 mg/g。动力学和等温线研究表明，KBC 对 CR 和 MB 的吸附是化学吸附，发生在单层表面上。综合分析也为 KBC 在实际生产中的应用提供了依据。这些结果表明，KBC 可能成为废水处理的新选择。