Abstract
The Test was to examine the adsorption property of Pb(II) irons by Linde type F (K) zeolite. The zeolite was synthesized by fly ash. The adsorbent dosage, pH, reaction temperature and reaction time were investigated. The adsorption isotherm and adsorption kinetics equation were studied. The results showed the adsorbent dosage, pH, reaction temperature and reaction time had significant effects on the adsorption of Pb(II) irons. The removal rate was improved with the increasing of zeolite dosage. The saturated adsorption capacity was decreased gradually. The adsorption of Pb(II) irons tended to saturate when initial pH was 6. With the increasing of temperature, the equilibration time of adsorption was shorter. Langmuir isotherm was more applicable to explain the monolayer adsorption procedure of Pb(II) on Linde type F(K) zeolite. For adsorption kinetics, pseudo-second order model showed better calculation results.
Highlights
Heavy metals are nowadays among the most important pollutants in source and treated water, are becoming a severe public health problem, can be toxic to aquatic life and cause natural waters to be unsuitable as potable water sources [1]
The results showed that the zeolite dosage had the significant effect on the adsorption of Pb(II) ions
The adsorption efficiency increased from 46% to nearly 100% as the dose increased from 0.25 to 2.00 g/L
Summary
Heavy metals are nowadays among the most important pollutants in source and treated water, are becoming a severe public health problem, can be toxic to aquatic life and cause natural waters to be unsuitable as potable water sources [1]. The adsorption with the selection of a suitable adsorbent can be an effective technique for the removal of heavy metals from wastewater [2]. The major components of fly ash make it a potential agent for the adsorption of heavy metal contaminants in water and wastewaters [3,5]. The synthesis of zeolite will be a successful alternative to deal with fly ash waste, resulting in low-cost and environmentally friendly materials. Linde F (K) type zeolite is a product gained from hydrothermal reaction between fly ash and high concentration KOH solution. This work is to synthesize Linde F (K) type zeolite from fly ash, and to use it as an adsorbent for removal of Pb(II) from aqueous solution.
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