期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：5
页码：12486
出版社：S&S Publications
摘要：The leaching kinetics of nitrate (NO3-) in agricultural (pH = 7.2) and non-agricultural soils (pH = 6.8) was studiedusing undisturbed glass columns method . The soils were taken from the agriculture field and barren land near Dheerkheraagricultural area, Hapur. The Sodium nitrate (NaNO3) is used as a source of NO3-. Power form equations (LRobs = k1 [NO3- ]i 2.91for agricultural and (LRobs = k2 [NO3- ]i1.829 for non-agricultural soils have been derived for dependence of LRobs on leachableconcentration of NO3- present initially. The effects of pore volume, temperature, Ca hardness have been observed on leachingrate. Change in water filled porosity θ (cm3cm-3) of the column has been found to affect LRobs. The LRobs is found to increasewith temperature in the range 30-50°C. Experimental data fitting on various kinetic models showed first order kinetic models andparabolic diffusion to be most suited for predicting leaching rates.
关键词：Nitrate; adsorption; leaching; glass column; first order; pore volume; BTC.
