Work

Enhanced adsorption of copper citrate complexes by ferromanganese oxide biochar from water: performance and mechanism

Year: 2025

Type: article

Abstract: Due to the stable structure of complex metals, their removal is more challenging compared to metal ions. Additionally, the removal mechanism of metal complexes is closely related to their structure. This study developed a low-cost and economically efficient ferromanganese oxide-modified biochar and explored the preparation conditions in detail. The surface of ferromanganese oxide-modified biochar was uniformly loaded with 100 nm nanoparticles, mainly comprising Mn3O4 and (FeO)0.099(MnO)0.901, and exhibited excellent copper citrate (CuCA) adsorption capacity. The removal rate of CuCA at an initial concentration of 10 mg/L by 1 g/L modified biochar reached 99.5% for Cu and 87.7% for TOC, with a copper adsorption capacity of 3.79 mg/L. The mechanism of using modified biochar to remove CuCA includes chemical adsorption at the bimetallic oxide active sites and oxygen-containing functional groups on the surface of the biochar, as well as physical adsorption due to biochar’s porous structure and other effects. The modified biochar shows good performance and stability in wide pH range and certain coexisting ions. Ferromanganese oxide-modified biochar own the advantage of efficient, economical and easy to preparation, which has significant potential for development in the removal of metal complexes in water.

Source: Biochar X

DOI: 10.48130/bchax-0025-0001

Authors: Ying Zhu, Xiang Lei, Jianguo Liu, YiTing Li, Wenhong Fan

Institutions: Inner Mongolia University of Technology, Inner Mongolia University

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: diamond

Funder: National Natural Science Foundation of China