中南大学学报（自然科学版）2025，Vol.56Issue(9)：3615-3626,12.DOI:10.11817/j.issn.1672-7207.2025.09.004
氨基酸促进钙长石中元素浸出机理
Mechanism of amino acid promoting element leaching in anorthite
摘要
Abstract
The leaching rate of Ca,Mg and other elements in anorthite is a key factor restricting the carbon fixation process.Compared with traditional physical and chemical methods,the use of microbial metabolites to promote mineral dissolution has the advantages of low pollution,low energy consumption and low cost.In this paper,density functional theory(DFT)calculations and leaching experiments were used to study the microscopic mechanism of amino acid promoting element leaching in anorthite and to compare the influence of different types of amino acid on the leaching effect.After the amino acid molecules are adsorbed on the surface of anorthite,the H atoms on the amino groups interact with the mineral surface through hydrogen bonds.The hydroxyl groups on the carboxyl groups break,resulting in hydroxylation of the mineral surface.The surface Al atoms tend to combine with the carbonyl O in the carboxyl groups,and charge transfers and orbital hybridization occurs.The order of leaching effect of the three amino acids from strong to weak is aspartic acid,lysine,glycine,that is,acidic amino acid,alkaline amino acid,neutral amino acid.The results show that the hydrogen bonding and complexation of amino acid jointly promote the leaching of elements and the stretching vibration of the chemical bonds,resulting in the loosening of silicon(aluminum)oxygen tetrahedron skeleton and accelerating the dissolution of anorthite.关键词
氨基酸/钙长石/密度泛函理论/吸附/浸出机理Key words
amino acid/anorthite/DFT/adsorption/leaching mechanism分类
矿业与冶金引用本文复制引用
皋梦悦,郭建英,刘生玉,常承兵,谢炙轩..氨基酸促进钙长石中元素浸出机理[J].中南大学学报（自然科学版）,2025,56(9):3615-3626,12.基金项目
山西省基础研究计划项目(202203021211165) （202203021211165）
山西浙大新材料与化工研究院研发项目(2022SX-TD009) （2022SX-TD009）
山西省研究生科研创新项目(2024KY159)(Project(202203021211165)supported by the Fundamental Research Program of Shanxi Province （2024KY159）
Project(2022SX-TD009)supported by the Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering （2022SX-TD009）
Project(2024KY159)supported by the Graduate Education Innovation Program of Shanxi Province) （2024KY159）
