DocumentCode :
3149854
Title :
Adsorption Characteristics of Ammonia-Nitrogen onto Different Lithology
Author :
Tian Hua ; Wang Wenke ; Sun Xiaoming ; Deng Lin
Author_Institution :
Sch. of Geol. & Environ. Eng., Xi´an Univ. of Sci. & Technol., Xi´an, China
fYear :
2010
fDate :
18-20 June 2010
Firstpage :
1
Lastpage :
3
Abstract :
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 ammonia-nitrogen 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 capacity of three lithology to prevent pollution are different and the clay is the best one.
Keywords :
adsorption; agricultural pollution; ammonia; clay; groundwater; nitrogen; reaction kinetics theory; retardants; soil; soil pollution; Langmuir model; ammonia-nitrogen adsorption; dynamic equilibrium; groundwater; lithology; maximal adsorption capacity; nitrogen pollution; pseudo second-order kinetic model; retardant capacity; silty clay; silty sand; soils; Dynamic equilibrium; Geology; Kinetic theory; Nitrogen; Oscillators; Predictive models; Retardants; Soil; Sun; Water pollution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
ISSN :
2151-7614
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
Type :
conf
DOI :
10.1109/ICBBE.2010.5517926
Filename :
5517926
Link To Document :
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