Use of Hydrous Manganese Oxides Nanopowders as a Potential Sorbent for Selective Removal of Nickel Ions from Industrial Waste Water, Kinetics and Isotherm Studies

Abstract

Hydrous Manganese Oxides Nanopowders as nano adsorbent (MONs) was synthesized and characterized by Xray diffraction (XRD), scanning electron microscopy (SEM), and transform infrared spectroscopy (FT-IR). The adsorption of Ni (II) ions from aqueous solution on the MONs was investigated with variations in contact time, pH, initial Ni (II) concentration and adsorbent dosage. The results showed that the adsorption of Ni (II) onto MONs increased within 25 min and reached equilibrium gradually and removal percentage were 83%, 57%, 42% and 35% for 25 ppm, 50 ppm, 75 ppm and 100 ppm Ni (II), respectively, by using 1g/l MONs for 90 min at pH 6. The adsorption behavior of Ni (II) onto MONs was best described by the pseudo-second-order model and Freundlish isotherm. The results also indicated that the type of adsorption involved in this study is physiosorption (physical sorption) which usually takes place at low temperature. The results also revealed that MONs was a promising adsorbent for removal of Ni ions from industrial wastewater.

Dye removal from water and wastewater by nanosized metal oxides - modified activated carbon: a review on recent researches

“…Furthermore, these compounds increase the ability to adsorb contaminants such as dyes, due to the high special surface area [40,135]. The metal oxide nanoparticles such as iron oxide [136,137], titanium oxide [138], zinc oxide [139], magnesium oxide [140], nickel oxide [141], manganese oxide [142], copper oxide [143] and zirconium oxide and its combination with iron are the most used nanoparticles [144,145]. As mentioned, to receive the advantages of the AC and metal oxide nanoparticles and overcoming their weaknesses, integration of active carbon with nano metal oxides has been developed in various studies by loading zinc oxide (ZnO) [135], iron(III) oxide (Fe 2 o 3 ) [39], lead oxide (PbO) [50], tin oxide (SnO 2 )…”