吉林省临江硅藻土及其尾矿对钾的吸附性能

【目的】揭示吉林省临江硅藻土及其尾矿对钾的吸附性能,为开发和利用硅藻土尾矿作为土壤钾肥肥力调控物质提供理论依据。【方法】以临江优质硅藻土原矿及尾矿为研究对象,在对其化学组成和矿物组成进行分析的基础上,采用静态平衡吸附法研究了优质硅藻土及其尾矿对K＋的吸附、解吸特性。【结果】硅藻土尾矿与优质硅藻土相比,Si O2质量分数有较大差异,分别为78.57%和89.29%;两者的矿质组成均以非晶质蛋白石为主,同时尾矿比优质硅藻土含有更多的石英、高岭石、云母及有机质等杂质;优质硅藻土及其尾矿对K＋的动力学吸附均符合伪二阶动力学模型;对K＋的热力学吸附均整体符合Freundlich等温吸附方程,吸附反应容易...

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Published in华南农业大学学报 Vol. 37; no. 5; pp. 50 - 56
Main Author 高将 赵兰坡 荣立杰 姜亦梅 刘胜楠 李昕
Format Journal Article
LanguageChinese
Published 吉林农业大学 资源与环境学院/吉林省商品粮基地土壤资源可持续利用重点实验室,吉林 长春,130118 2016
Subjects
吸附动力学
尾矿
硅藻土
解吸
钾
diatomite
tailing
potassium
解吸
adsorption kinetics
尾矿
desorption
硅藻土
吸附动力学
钾
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Summary:【目的】揭示吉林省临江硅藻土及其尾矿对钾的吸附性能,为开发和利用硅藻土尾矿作为土壤钾肥肥力调控物质提供理论依据。【方法】以临江优质硅藻土原矿及尾矿为研究对象,在对其化学组成和矿物组成进行分析的基础上,采用静态平衡吸附法研究了优质硅藻土及其尾矿对K＋的吸附、解吸特性。【结果】硅藻土尾矿与优质硅藻土相比,Si O2质量分数有较大差异,分别为78.57%和89.29%;两者的矿质组成均以非晶质蛋白石为主,同时尾矿比优质硅藻土含有更多的石英、高岭石、云母及有机质等杂质;优质硅藻土及其尾矿对K＋的动力学吸附均符合伪二阶动力学模型;对K＋的热力学吸附均整体符合Freundlich等温吸附方程,吸附反应容易进行;对K＋的解吸均符合Elovich方程;2种硅藻土解吸过程达到平衡之前,K＋的解吸率与反应时间的对数（lnt）均存在良好的线性关系。【结论】硅藻土尾矿的矿物组成以非晶质蛋白石为主,对钾具有一定的吸附解吸能力。
Bibliography:44-1110/S
diatomite ; tailing; potassium ; adsorption kinetics ; desorption
GAO Jiang, ZHAO Lanpo, RONG Lijie, JIANG Yimei, LIU Shengnan, LI Xin （ College of Resources and Environment, Jilin Agricultural University/Key LaboratoU of Soil Resource Sustainable Utilization for Jilin Province Commodity Bases, Changchun 130118, Ch
[ 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 railings as soil K ^＋regulation materials. [ Method ] High quality diatomite raw ore and railings were collected 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 SiO2contents which were 78.57% and 89.29% respectively. Both were mainly composed of amorphous opal, yet only rai
ISSN:1001-411X