硅酸盐学报2021，Vol.49Issue(2)：391-397,7.DOI:10.14062/j.issn.0454-5648.20200273
含钾硅酸盐肥料在盐酸与柠檬酸中的溶解行为
Dissolution Behaviors of K-containing Silicate Fertilizer in Hydrochloric and Citric Acids
摘要
Abstract
To clarify the dissolution behavior of K-containing silicate fertilizers produced by high-temperature sintering under acidic condition, the chemical element release and mineral evolution were investigated at ambient temperature in the extractants of hydrochloric and citric acids based on the chemical reactions of minerals contained in silicate fertilizer with acids. The results show that the more elements are released at a lower pH value of extractant. 2％ citric acid with pH 2.1 is significantly more effective in dissolving the silicate fertilizer than hydrochloric acid with the same pH value. The dissolution rate of silicate fertilizer in hydrochloric acid at pH value of 0.3 is maximum, and only a mineral detected in the filter residue is leucite. Kaolinite and gibbsite are formed in the reactions of kalsilite and gehlenite with acid. Aluminum release is due to the further reactions of kaolinite and gibbsite with acid.关键词
pH值/盐酸/柠檬酸/高岭石/铝毒Key words
pH value/hydrochloric acid/citric acid/kaolinite/aluminum toxicity分类
化学工程引用本文复制引用
李小燕,万夫伟,赵秉强,俞为民..含钾硅酸盐肥料在盐酸与柠檬酸中的溶解行为[J].硅酸盐学报,2021,49(2):391-397,7.基金项目
十三五国家重点研发计划(2017YFB0310801)资助. （2017YFB0310801）
