In this work, an inexpensive and environmentally friendly natural adsorbent obtained from shelled (GD) and unshelled (GND) </span><span style="font-family:""><i></span><i>&...In this work, an inexpensive and environmentally friendly natural adsorbent obtained from shelled (GD) and unshelled (GND) </span><span style="font-family:""><i></span><i><span style="font-family:"">Moringa oleifera</span></i><i><span style="font-family:""></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:"">seeds was used for copper adsorption from aqueous solutions. A series of experiments were performed to assess the parameters influencing the adsorption pheno<span>menon such as pH, adsorbent mass, adsorption equilibrium time and</span> temper<span>ature. The kinetic results of adsorption described a pseudo-second order</span> mod<span>el. The adsorption isotherms are satisfactorily described by the Langmuir</span> mathematical model. The thermodynamic data revealed a spontaneous and endothermic adsorption phenomenon. The level of copper in surface water be<span>fore and after addition of moringa powders was carried out to verify the effectiveness of the adsorbent. A maximum adsorption rate of 51.28% and </span>61.96% was obtained with GD and GND powders respectively. </span><span style="font-family:""><i></span><i><span style="font-family:"">Moringa oleifera</span></i><i><span style="font-family:""></i></span></i><span style="font-family:""> seed powders are an effective alternative for the removal of copper from surface water.展开更多
文摘In this work, an inexpensive and environmentally friendly natural adsorbent obtained from shelled (GD) and unshelled (GND) </span><span style="font-family:""><i></span><i><span style="font-family:"">Moringa oleifera</span></i><i><span style="font-family:""></i></span></i><i><span style="font-family:""> </span></i><span style="font-family:"">seeds was used for copper adsorption from aqueous solutions. A series of experiments were performed to assess the parameters influencing the adsorption pheno<span>menon such as pH, adsorbent mass, adsorption equilibrium time and</span> temper<span>ature. The kinetic results of adsorption described a pseudo-second order</span> mod<span>el. The adsorption isotherms are satisfactorily described by the Langmuir</span> mathematical model. The thermodynamic data revealed a spontaneous and endothermic adsorption phenomenon. The level of copper in surface water be<span>fore and after addition of moringa powders was carried out to verify the effectiveness of the adsorbent. A maximum adsorption rate of 51.28% and </span>61.96% was obtained with GD and GND powders respectively. </span><span style="font-family:""><i></span><i><span style="font-family:"">Moringa oleifera</span></i><i><span style="font-family:""></i></span></i><span style="font-family:""> seed powders are an effective alternative for the removal of copper from surface water.
