High porosity biochar and its treatment of phosphate in wastewater

被引：0

作者：

Li J. ^{[1
]}

Wang P. ^{[1
]}

Wan S. ^{[2
]}

Chen R. ^{[1
]}

机构：

[1] College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha

[2] Hunan Research Institute for Nonferrous Metals CO., LTD., Changsha

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 11期

关键词：

adsorption; biochar; modified materials; phosphate; specific surface;

D O I：

10.13801/j.cnki.fhclxb.20230131.001

中图分类号：

学科分类号：

摘要：

Biochar is a product of pyrolysis of biomass under anoxic conditions; however, common biochar has a small surface area, underdeveloped pore structure, few surface active groups, and poor adsorption effect. In this work, biochar was prepared from sorghum (GC) and grapefruit peel (YC) by surface treatment using four substances to obtain biochar, where the prepared sorghum/KOH (GC-KH) and grapefruit peel/KOH (YC-K) powders had obvious surface porosity, confirming the feasibility of the process. With a specific surface area of 2 096.05 m2/g and an average pore size of 4.12 nm, GC-KH is rich in oxygen-containing functional groups on its surface, providing a good structural space and active sites for adsorption.The effect of different factors on phosphate adsorption was explored by batch experiments to assess the ionic strength. Results of isotherms showed that the adsorption of phosphate by GC-KH occurred on the surface of the monomolecular layer, and the maximum adsorption capacity of phosphate by GC-KH was 74.73 mg/g at pH=7. It has significant advantages such as rapid response, which provides an innovative pathway for the efficient removal of phosphate from wastewater. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.

引用

页码：6395 / 6406

页数：11

共 43 条

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