Suliman Younes * (1), Leila Habib (2) and Ghiath Alloush(2)
(1). General Commission for Scientific Agricultural Research, Lattakia, Syria.
(2). Department of Soil and Water Sciences- Faculty of Agriculture, Tishreen University, Lattakia, Syria.
(*Corresponding author: Eng Suliman Younes.. E-Mail: sulimanyounes89@gmail.com).
Received: 30/09/2021 Accepted: 12/03/2022
Abstract:
The objective of this research was to study the adsorption and kinetics of ammonium ion on Syrian Zeolite Ore (SZO). This is a preliminary study for the use of zeolite in reducing nitrogen loss during composting of poultry manure. The study was conducted using gradient concentrations of ammonium chloride solution. Langmuir and Freundlich models applied. Both models predicted the adsorption process with coefficient correlation values R2 ≥ 0.968. Kinetics adsorption studied using pseudo first order and Intra particle diffusion models. Models constants indicated that they could predict kinetics adsorption of ammonium, while models parameters indicated participation of more than one sorption mechanisms. The adsorbed ammonium on zeolite desorbed through successive extraction with 0.002 M of calcium or potassium chloride solutions in presence and absence of soil. 65 % of the absorbed ammonium was desorbed when using calcium chloride, whereas 94% of the absorbed ammonium was released within 168 hours using potassium chloride solution.
Key words: Syrian Zeolite Ore, Ammonium, adsorption, Kinetics.
Full paper in Arabic: pdf