Adsorption characteristics of ammonia-nitrogen onto different lithology
(0) Aimed at the current situation of nitrogen pollution in groundwater, adsorption characteristics of ammonia-nitrogen onto different lithology named silty sand, silty clay and clay were studied. The results indicated that the process of ammonianitrogen adsorption onto soils mainly occurred within 0~2 h, then attended to a dynamic equilibrium. Two kinetic models can describe the experiment data and adsorption onto different lithology obeyed the pseudo second-order kinetic model. The data of the ammonia-nitrogen sorption isotherms at different initial concentration ranges can be fitted by the linear form of Langmuir model remarkably. The maximal adsorption capacity of ammonia-nitrogen ranged from 0.088 to 0.540mg·g-1. The retardant capacitiy of three lithology to prevent pollution are different and the clay is the best one.
Tian Hua Wang Wenke Sun Xiaoming Deng Lin
School of Geology and Environmental Engineering Xi’an University of Science and Technology Xi’an, Ch School of Environmental Science and Engineering Chang’an University Xi’an, China, 710054 Tianjin institute of Geological Survey Tianjing, China, 300170
国际会议
成都
英文
1-3
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）