高校地质学报2026，Vol.32Issue(4)：514-521,8.DOI:10.16108/j.issn1006-7493.2025038
溶解速率对硫酸盐矿物厌氧分解的制约
Constraints of Dissolution Rates on the Anaerobic Decomposition of Sulfate Minerals
摘要
Abstract
In this study,three representative sulfate minerals(gypsum,anhydrite,and celestite)were co-cultured with a strain of sulfate-reducing bacteria(SRB).The process of and constraints on anaerobic decomposition of typical sulfate mineral were investigated by monitoring dynamic changes in solution pH,oxidation-reduction potential,protein content,acid-volatile sulfur,and SO42-concentration during the 360-hour incubation period,combined with post-cultivation analysis of mineral surface micromorphology.The results show that oxidation-reduction potential levels follows the order:gypsum system<anhydrite system<celestite system.Concentrations of proteins,SO42-,and acid-volatile sulfur exhibited:gypsum system>anhydrite system>celestite system.SRB growth rates decrease sequentially as:gypsum system>anhydrite system>celestite system.Post-experiment analysis reveals that the formation of etch pits and dissolution micropores on the surfaces of anhydrite and celestite occurs at sites where bacterial cells and their metabolic byproducts made contact.The study demonstrates that anaerobic decomposition process of sulfate mineral is fundamentally constrained by their solubility and dissolution rates.Gypsum with the fastest dissolution rate facilitates robust SRB growth through readily available dissolved SO42-,thereby accelerating its own decomposition.Anhydrite with the moderate dissolution rates supports SRB growth primarily through dissolved SO42-utilization,while bacterial adhesion and metabolic byproducts on mineral surfaces provide additional decomposition enhancement.Celestite possessing both low solubility and slow dissolution rates relies predominantly on bacterial adhesion to promote mineral breakdown,with SRB growth sustained by the limited SO42-released during this gradual decomposition process.关键词
硫酸盐矿物/硫酸盐还原菌/厌氧分解/溶解速率/粘附Key words
sulfate mineral/sulfate-reducing bacterium/anaerobic decomposition/dissolution rate/adhesion分类
天文与地球科学引用本文复制引用
杜蒙蒙,陈天虎,孔殿超,周跃飞,谢巧勤..溶解速率对硫酸盐矿物厌氧分解的制约[J].高校地质学报,2026,32(4):514-521,8.基金项目
国家自然科学基金(42372050 （）
42472062)资助 （）
