华南农业大学学报2016，Vol.37Issue(5)：50-56,7.
吉林省临江硅藻土及其尾矿对钾的吸附性能
Potassium adsorption properties of diatomite and tailings from Linjiang, Jilin Province
摘要
Abstract
[Objective] To reveal the potassium ( K+) adsorption properties of diatomite and tailings from Linjiang, Jilin Province, and provide theoretical basis for the development and utilization of diatomite and tailings as soil K+ regulation materials. [Method]High quality diatomite raw ore and tailings were col-lected in Linjiang, their chemical and mineral compositions were analyzed, and their K+ adsorption and desorption characteristics were studied by static equilibrium adsorption method.[Result]The high quality diatomite and tailings were considerably different in their SiO2 contents which were 78. 57% and 89. 29%respectively. Both were mainly composed of amorphous opal, yet only tailings contain some impurities such as quartz, kaolinite, mica and organic matter. The kinetic adsorptions of K+ by both high quality diatomite and its tailings were in accordance with pseudo two order kinetics model. The thermodynamic adsorptions of K+ by both were consistent with the Freundlich isotherm adsorption equation, and the ad-sorption reactions were easy to carry out. The K+desorptions by both were consistent with the Elovich e-quation. The K+desorption rates and the logarithmic values of reaction time ( Lnt) were well linearly cor-related before the desorption process reached equilibrium for both the high quality diatomite and tailings.[Conclusion] Diatomite tailings are mainly composed of amorphous opal, and has certain capacity of K+adsorption and desorption.关键词
硅藻土/尾矿/钾/吸附动力学/解吸Key words
diatomite/tailing/potassium/adsorption kinetics/desorption分类
矿山工程引用本文复制引用
高将,赵兰坡,荣立杰,姜亦梅,刘胜楠,李昕..吉林省临江硅藻土及其尾矿对钾的吸附性能[J].华南农业大学学报,2016,37(5):50-56,7.基金项目
“十二五”国家科技支撑计划项目(2013BAC09B01) （2013BAC09B01）
