文档介绍：Adsorption characteristics of ammonia-nitrogen onto
different lithology
Tian Hua1 Wang Wenke2 Sun Xiaoming3 Deng Lin2
1School of Geology and Environmental Engineering 2School of Environmental Science and Engineering
Xi’an University of Science and Technology Chang’an University
Xi’an, China Xi’an, China, 710054
Tianhua7366@ ******@chd.
3 Tianjin institute of Geological Survey
Tianjing, China, 300170
Abstract—Aimed at the current situation of nitrogen pollution in clay. Ammonia-nitrogen standard solution was prepared by
groundwater, adsorption characteristics of ammonia-nitrogen mixing ammonia chloride and purified water. Ammonia
onto different lithology named silty sand, silty clay and clay concentration is determined by spectrophotometer( Model 721,
were studied. The results indicated that the process of ammonia- China). Water baths shaker( Model HZS-2, China) was used as
nitrogen adsorption onto soils mainly occurred within 0~2 h, oscillator. The last one is centrifuge( Model TDL-5, China).
then attended to a dynamic equilibrium. Two ic models can
describe the experiment data and adsorption onto different B. ic procedure
lithology obeyed the pseudo second-order ic model. The
data of the ammonia-nitrogen sorption isotherms at different Batch studies[2] were conducted in a temperature-
initial concentration ranges can be fitted by t