Adsorption studies on Citrus reticulata (fruit peel of orange): removal and recovery of Ni(II) from electroplating wastewater

• Published in: Journal of hazardous materials Vol. 79; no. 1; pp. 117 - 131
• Main Authors: Ajmal, Mohammad, Rao, Rifaqat Ali Khan, Ahmad, Rais, Ahmad, Jameel
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-12-2000; Elsevier
• Subjects: Absorption; Adsorption; Applied sciences; Citrus reticulata; Desorption; Electroplating; Endothermic; Exact sciences and technology; Fruit - chemistry; Industrial wastewaters; Isotherm; Metals, Heavy - pharmacokinetics; Pollution; Regeneration; Waste Disposal, Fluid - methods; Wastewaters; Water Pollutants, Chemical - pharmacokinetics; Water treatment and pollution; Isotherm; Regeneration; Endothermic; Desorption; Adsorption; Nickel II Ions; Fruit by product; Industrial waste water; Orange peel; Electrodeposition; Metallurgical industry; Physicochemical purification; Adsorbent; Experimental study; Vegetal waste; Heavy metal
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/S0304-3894(00)00234-X

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°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.