This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Co... more This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Copper (Cu) from aqueous solutions by using a low cost natural adsorbent produced from Groundnut Shells (Arachis hypogaea). Batch adsorption experiments were carried out to determine the effect of contact time, adsorbent dosage and temperature on the adsorption processes. The functional groups and the surface properties of the activated carbon were determined using FTIR and SEM. The equilibrium, kinetics and thermodynamics studies of the sorption process were also carried out. The Heavy metal ion adsorption equilibriums were attained at 120 minutes of the contact time, and it was described by the Langmuir and Freundlich adsorption isotherms. Adsorption data obtained from the equilibrium studies suggests that the activated carbon produced fits better into the Freundlich Isotherm (R2 > 90) and that the adsorption of Cu and Fe ions are best described by the pseudo-second order kinetic model (R2>94), which indicate that the adsorption mechanism is chemisorption and adsorption of the Zinc ions are better described by the first-order kinetics (R2>88) implying Zn ions undergo physisorption. From the values of thermodynamic parameters (ΔHo, ΔSo, and ΔGo), it was evident that adsorption of Fe and Cu ions followed exothermic process and were spontaneous at lower temperatures (-ΔHo values and - ΔSo values). Adsorption of Zn ions followed endothermic process and it is non spontaneous (+ΔHo values and - ΔSo values). The FTIR result proved the existence of some essential functional groups like hydroxyl (OH) on the activated carbon which have been proven to aid adsorption The SEM analysis revealed the micro-porous structure of the Activated Carbon to be elongated in shape. Therefore, the Activated Carbon produced from the groundnut shells is more efficient for the adsorption of Cu and Fe than adsorption of Zn ions.
This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Co... more This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Copper (Cu) from aqueous solutions by using a low cost natural adsorbent produced from Groundnut Shells (Arachis hypogaea). Batch adsorption experiments were carried out to determine the effect of contact time, adsorbent dosage and temperature on the adsorption processes. The functional groups and the surface properties of the activated carbon were determined using FTIR and SEM. The equilibrium, kinetics and thermodynamics studies of the sorption process were also carried out. The Heavy metal ion adsorption equilibriums were attained at 120 minutes of the contact time, and it was described by the Langmuir and Freundlich adsorption isotherms. Adsorption data obtained from the equilibrium studies suggests that the activated carbon produced fits better into the Freundlich Isotherm (R2 > 90) and that the adsorption of Cu and Fe ions are best described by the pseudo-second order kinetic model (R2>94), which indicate that the adsorption mechanism is chemisorption and adsorption of the Zinc ions are better described by the first-order kinetics (R2>88) implying Zn ions undergo physisorption. From the values of thermodynamic parameters (ΔHo, ΔSo, and ΔGo), it was evident that adsorption of Fe and Cu ions followed exothermic process and were spontaneous at lower temperatures (-ΔHo values and - ΔSo values). Adsorption of Zn ions followed endothermic process and it is non spontaneous (+ΔHo values and - ΔSo values). The FTIR result proved the existence of some essential functional groups like hydroxyl (OH) on the activated carbon which have been proven to aid adsorption The SEM analysis revealed the micro-porous structure of the Activated Carbon to be elongated in shape. Therefore, the Activated Carbon produced from the groundnut shells is more efficient for the adsorption of Cu and Fe than adsorption of Zn ions.
This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Co... more This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Copper (Cu) from aqueous solutions by using a low cost natural adsorbent produced from Groundnut Shells (Arachis hypogaea). Batch adsorption experiments were carried out to determine the effect of contact time, adsorbent dosage and temperature on the adsorption processes. The functional groups and the surface properties of the activated carbon were determined using FTIR and SEM. The equilibrium, kinetics and thermodynamics studies of the sorption process were also carried out. The Heavy metal ion adsorption equilibriums were attained at 120 minutes of the contact time, and it was described by the Langmuir and Freundlich adsorption isotherms. Adsorption data obtained from the equilibrium studies suggests that the activated carbon produced fits better into the Freundlich Isotherm (R2 > 90) and that the adsorption of Cu and Fe ions are best described by the pseudo-second order kinetic model (R2>94), which indicate that the adsorption mechanism is chemisorption and adsorption of the Zinc ions are better described by the first-order kinetics (R2>88) implying Zn ions undergo physisorption. From the values of thermodynamic parameters (ΔHo, ΔSo, and ΔGo), it was evident that adsorption of Fe and Cu ions followed exothermic process and were spontaneous at lower temperatures (-ΔHo values and - ΔSo values). Adsorption of Zn ions followed endothermic process and it is non spontaneous (+ΔHo values and - ΔSo values). The FTIR result proved the existence of some essential functional groups like hydroxyl (OH) on the activated carbon which have been proven to aid adsorption The SEM analysis revealed the micro-porous structure of the Activated Carbon to be elongated in shape. Therefore, the Activated Carbon produced from the groundnut shells is more efficient for the adsorption of Cu and Fe than adsorption of Zn ions.
This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Co... more This paper presents the feasibility of removal of heavy metal ions of iron (Fe), Zinc (Zn) and Copper (Cu) from aqueous solutions by using a low cost natural adsorbent produced from Groundnut Shells (Arachis hypogaea). Batch adsorption experiments were carried out to determine the effect of contact time, adsorbent dosage and temperature on the adsorption processes. The functional groups and the surface properties of the activated carbon were determined using FTIR and SEM. The equilibrium, kinetics and thermodynamics studies of the sorption process were also carried out. The Heavy metal ion adsorption equilibriums were attained at 120 minutes of the contact time, and it was described by the Langmuir and Freundlich adsorption isotherms. Adsorption data obtained from the equilibrium studies suggests that the activated carbon produced fits better into the Freundlich Isotherm (R2 > 90) and that the adsorption of Cu and Fe ions are best described by the pseudo-second order kinetic model (R2>94), which indicate that the adsorption mechanism is chemisorption and adsorption of the Zinc ions are better described by the first-order kinetics (R2>88) implying Zn ions undergo physisorption. From the values of thermodynamic parameters (ΔHo, ΔSo, and ΔGo), it was evident that adsorption of Fe and Cu ions followed exothermic process and were spontaneous at lower temperatures (-ΔHo values and - ΔSo values). Adsorption of Zn ions followed endothermic process and it is non spontaneous (+ΔHo values and - ΔSo values). The FTIR result proved the existence of some essential functional groups like hydroxyl (OH) on the activated carbon which have been proven to aid adsorption The SEM analysis revealed the micro-porous structure of the Activated Carbon to be elongated in shape. Therefore, the Activated Carbon produced from the groundnut shells is more efficient for the adsorption of Cu and Fe than adsorption of Zn ions.
Uploads
Papers by Ahmed Aay
Drafts by Ahmed Aay