Ammonia and Nitrogen Adsorption Behavior of Ditch Sediment After Paddy Field Water-break in Estuary

doi:10.11924/j.issn.1000-6850.casb15060075

Abstract

Abstract: Adsorption behavior of sediments on ammonia and nitrogen is an important part of nitrogen transformation process of ditch-ecosystem in estuary. Adsorption kinetics experiment, isothermal adsorption experiment and the influencing factors of the adsorption behavior of sediments on ammonia and nitrogen were studied by simulation tests. The results showed that: the process of ammonium adsorption by sediments mainly had two stages which were fast stage and slow stage, the fast stage could complete within 2 h, and the slow stage could complete within 6 h, the adsorption behavior reached balance after 6 h; isothermal adsorption of ammonia nitrogen by sediments showed a good linear relation, the fitting results of Langmuir model was good. Thus it could be seen, the adsorption ability of trunk canal sediments on ammonia nitrogen was higher than that of agriculture ditch; organic matter, iron and manganese could affect the adsorption behavior in different degrees, and the adsorbing capacity increased with the increase of organic matter, iron and manganese.

CLC Number:

X703

Ji Xianchao,Li haibo,Yu Yanyan,Duan Yulong and Wang Shiman. Ammonia and Nitrogen Adsorption Behavior of Ditch Sediment After Paddy Field Water-break in Estuary[J]. Chinese Agricultural Science Bulletin, 2015, 31(32): 148-153.

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