title: Adsorption studies on Citrus reticulata (fruit peel of orange): removal and recovery of Ni(II) from electroplating wastewater.
abstract: The ability of fruit peel of orange to remove Zn, Ni, Cu, Pb and Cr from aqueous solution by adsorption was studied. The adsorption was in the order of Ni(II)>Cu(II)>Pb(II)>Zn(II)>Cr(II). The extent of removal of Ni(II) was found to be dependent on sorbent dose, initial concentration, pH and temperature. The adsorption follows first-order kinetics. The process is endothermic showing monolayer adsorption of Ni(II), with a maximum adsorption of 96% at 50 degrees C for an initial concentration of 50 mg l(-1) at pH 6. Thermodynamic parameters were also evaluated. Desorption was possible with 0.05 M HCl and was found to be 95.83% in column and 76% in batch process, respectively. The spent adsorbent was regenerated and recycled thrice. The removal and recovery was also done in wastewater and was found to be 89% and 93.33%, respectively.
authors.affiliation: Environmental Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, 202 002 (UP), Aligarh, India. maaczhc@amu.ernet.in
authors.forename: M
authors.initials: M
authors.lastname: Ajmal
authors.forename: R A
authors.initials: RA
authors.lastname: Rao
authors.forename: R
authors.initials: R
authors.lastname: Ahmad
authors.forename: J
authors.initials: J
authors.lastname: Ahmad
mesh_terms: D000042:Absorption; D004595:Electroplating; D005638:Fruit / Q000737:chemistry*; D019216:Metals, Heavy / Q000493:pharmacokinetics*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical