摘要
从钼酸铵示踪剂的吸附与解吸对岩溶区示踪曲线的影响出发,进行了不同粒径石灰岩颗粒对痕量钼酸铵吸附特性的试验研究.结果表明:在痕量钼酸铵浓度下,石灰岩吸附痕量钼服从非线性规律,且可用Freundlich等温吸附方程描述;粒径小于2.0mm时,非线性指数n值变化甚微,但粒径大于2.0mm时,n值明显减小,粒径2.0mm是n值明显变化的分界点.反映吸附能力强弱的吸附参数K值随粒径的增大而减小,当粒径大于2.0mm时,吸附能力明显减小,而粒径小于0.5mm时,吸附能力则明显增大.
Based on the influences of adsorption and desorption of ammonium molybdate tracers on tracer curves in karst areas,experimental studies on the adsorption characteristics of limestone with different particle sizes in order to trace molybdenum were carried out. The results show that the adsorption of limestone obeys nonlinear rules with ammonium molybdate concentration,and it can be described by the Freundich isotherm adsorption equation. When the particle size is smaller than 2.0 mm,there is little variation of nonlinear exponent n,and when the particle size is larger than 2.0 mm,the value of n significantly decreases. Accordingly,a particle size of 2.0 mm is the dividing point for significant variation of values of n. The value of K reflecting the adsorption ability decreases with the increase of the particle size. When the particle size is larger than 2.0 mm,the adsorption ability significantly decreases,and when the particle size is smaller than 0.5 mm,the adsorption ability significantly increases.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第3期300-303,共4页
Journal of Hohai University(Natural Sciences)
基金
国家自然科学基金(50809024)
关键词
颗粒粒径
平衡时间
吸附试验
钼酸铵
等温吸附方程
吸附常数
particle size
balance time
adsorption experiment
ammonium molybdate
isothermal adsorption equation
adsorption constant
