title: Biosorption of Pb(II) from aqueous solution by Solanum melongena leaf powder as a low-cost biosorbent prepared from agricultural waste.
abstract: Solanum melongena leaves are relatively galore and used as inexpensive material. This paper presents the characterization and evaluation of potential of S. melongena leaf powder (SMLP) for removal of Pb(II) from aqueous solution as a function of pH, biomass dosage, initial metal ion concentration, contact time and temperature. Experimental data were analyzed in terms of three kinetic models such as the pseudo-first-order, pseudo-second-order and intraparticle diffusion models and the results showed that the biosorption processes of Pb(II) followed well pseudo-second-order kinetics. Langmuir and Freundlich isotherm models were applied to describe the biosorption process. Langmuir isotherm described the equilibrium data very well, with a maximum monolayer sorption capacity of 71.42 mg/g for Pb(II) ions at 323 K. The biosorption process was spontaneous and endothermic in nature with negative ΔG° (-8.746, -8.509 and -7.983 kJ/mol) and positive value for ΔH° (3.698 kJ/mol).
authors.affiliation: Biopolymers and Thermophysical Laboratories, Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India.
authors.forename: Gutha
authors.initials: G
authors.lastname: Yuvaraja
authors.affiliation: Nanotechnology Research Laboratory, College of Engineering and Petroleum, Kuwait University, Safat, Kuwait.
authors.forename: Nettem
authors.initials: N
authors.lastname: Krishnaiah
authors.affiliation: Department of Chemical Engineering, Keimyung University, 2800 Dalgubeoldaero, Dalseo-Gu, Daegu 704-701, Republic of Korea.
authors.forename: Munagapati Venkata
authors.initials: MV
authors.lastname: Subbaiah
authors.affiliation: Biopolymers and Thermophysical Laboratories, Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India. Electronic address: abburikrishnaiah@gmail.com.
authors.forename: Abburi
authors.initials: A
authors.lastname: Krishnaiah
mesh_terms: D000327:Adsorption; D000383:Agriculture; D001673:Biodegradation, Environmental; D003365:Costs and Cost Analysis; D006863:Hydrogen-Ion Concentration; D007474:Ion Exchange; D007477:Ions; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D018515:Plant Leaves / Q000737:chemistry*; D011208:Powders; D032323:Solanum melongena / Q000737:chemistry*; D012996:Solutions; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013997:Time Factors; D014866:Waste Products; D014874:Water Pollutants, Chemical / Q000191:economics* / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D007477:Ions; D011208:Powders; D012996:Solutions; D014866:Waste Products; D014874:Water Pollutants, Chemical; D007854:Lead
keywords: Biosorption; Lead; Solanum melongena leaf powder