摘要
在不同浓度支持电解质条件下 ,利用滴定方法研究黄土样品的表面酸碱属性 .将酸量滴定上清液作为体系空白以补偿固体颗粒溶解和组份间络合反应对定量估算质子消耗的影响 .两种简易的表面络合模式的拟合结果表明 ,恒定容量模式和扩散层模式分别适用于高离子强度 (0 1mol L)和低离子强度 (0 0 1和 0 0 0 5mol L)条件下黄土表面的质子反应过程 .
Titration was used to study the surface acid-base characteristics of a Chinese loess sample at different concentrations of supporting electrolyte. The acidimetric supernatant was considered as the system blank to compensate the influence of particle dissolution and complex reactions between soluble components on estimation of proton consumption. The simulation results of two simple surface complexation models indicated that the constant capacitance model and the diffuse layer model were applicable to the high ionic strength (0.1*!mol/L) and to the low ionic strengths (0.01 and 0.005*!mol/L), respectively.
出处
《环境科学学报》
CAS
CSCD
北大核心
2003年第1期6-10,共5页
Acta Scientiae Circumstantiae
基金
国家自然科学基金重点项目 (2 0 0 370 10 )
中国辐射防护研究院横向课题 (合同登记号2 0 0 1110 82 0 0 5 78)的资助
