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Langmuir, Freundlich and BET Adsorption Isotherm Studies for Zinc ions onto coal fly ash

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Figure

Figure 1 shows the SEM micrograph of a coal fly ash sample at 20000x  magnification. It is seen that, fly ash particles are mostly spherical in shape, whereas small amount of irregular shaped particles are also present.
Figure 3 condition. (Experimental Condition: Initial Concentration of Zn  Variation in efficiency  of Zn+2 ions removed from solution against contact time under constant stirring +2 ions = 20 mg/l; Amount of Fly ash = 10 gm / 100 ml solution, Initial pH = 5.89)
Figure 5   Variation in percentage efficiency of fly ash for Zn+2 ions removal from solution against initial concentration of Zn+2 ions in solution
Figure 7   Freundlich adsorption isotherm of Zn+2 ions from aqueous solution using fly ash adsorbent

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