Abstract
Adsorption process is an important technique in separation processes, which is used in heavy metals removal from aqueous solution. Orange peel has been investigated for the adsorption of uranium ions from aqueous solution.The parameters of pH, contact time, initial uranium ion concentration, temperature and adsorbent dose have been investigated in batch experiments. The adsorption kinetics were described using pseudo-second order model and the adsorption isotherms were described by Langmuir and Freundlich isotherms which indicate that the uranium adsorption onto orange peel fitted well with Langmuir isotherm.
Highlights
Several methods are used to remove uranium from liquid wastes
The results show that the adsorption percent of uranium ions remain almost the same in the studied temperature range
The results obtained indicate that orange peels can be used for removal uranium ions from liquid wastes
Summary
Several methods are used to remove uranium from liquid wastes. These include volume reduction followed by chemical, physical and biological treatment. These processes are both costly and ineffective, when the concentration of uranium in liquid waste is a very low [1,2]. Numerous researches have been carried out for using of low cost and eco-friendly adsorbents, such as peat [3,4], agricultural byproducts [5,6,7], and microbial biomass [8]. The sorption of U (VI) onto orange peel carried out by studying the effect of various parameters such as pH, contact time, initial uranium concentration and adsorbent dosage in batch experiments.
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