Snate Key Labonatory of Eco fhydrnoudics in Norhwest Arid Region;
Xi'an Unesity of Teckunology.Xi'an 710048;
China;
North China University of Wiater Resoures and Electric Puwer Zhengzhow 450045;
China;
College of Wanter Couseriangy and Civil Engineening;
China Agricndnuml Unersiny.Beijing 100083;
China;
Heman Key Labrratory of Water Re soures Comsenation and lueestive Uilization in the Hellow River Basin;
Zhengzhou 450046;
China;
adsorption capacity; adsorption isotherm; ammonium nitrogen; groundwater quality; soil properties;