Modeling of Copper Adsorption by <i>Moringa oleifera</i> Seed Powders

Abstract

In this work, an inexpensive and environmentally friendly natural adsorbent obtained from shelled (GD) and unshelled (GND) Moringa oleifera seeds was used for copper adsorption from aqueous solutions. A series of experiments were performed to assess the parameters influencing the adsorption phenomenon such as pH, adsorbent mass, adsorption equilibrium time and temperature. The kinetic results of adsorption described a pseudo-second order model. The adsorption isotherms are satisfactorily described by the Langmuir mathematical model. The thermodynamic data revealed a spontaneous and endothermic adsorption phenomenon. The level of copper in surface water before and after addition of moringa powders was carried out to verify the effectiveness of the adsorbent. A maximum adsorption rate of 51.28% and 61.96% was obtained with GD and GND powders respectively. Moringa oleifera seed powders are an effective alternative for the removal of copper from surface water.

Characterization and Application of Carbon Paste Electrode Modified by Moringa Oleifera Seed Powder to the Electrochemical Detection of Mercury

“…The physical characterization of carbon paste is noted in numerous works [8,9]. The hulled Moringa seed powder used in this study was characterized by Téhé et al, [20]. The physical characterization carried out by this team with IRTF, DRX, SEM techniques of the shelled seed powder showed a high structural heterogeneity, an amorphous and porous character of the matrix.…”

“…Moringa is also said to be full of numerous minerals, the main ones being sodium (Na), calcium (Ca), magnesium (Mg), etc. [20]. The study of the physicochemical properties of hulled seed powders revealed that these powders constitute a good source of proteins [20].…”

“…[20]. The study of the physicochemical properties of hulled seed powders revealed that these powders constitute a good source of proteins [20]. These proteins are made up of basic polypeptides capable of neutralizing colloids in turbid water [20].…”