title: Biosorption of lead ions from aqueous effluents by rapeseed biomass.
abstract: Lead, as well as other heavy metals, is regarded as priority pollutant due to its non-biodegradability, toxicity and persistence in the environment. In this study, rapeseed biomass was used in the biosorption of Pb(II) ions in batch and dynamic conditions, as well as with tests for industrial wastewater. The influence of initial concentration (5-250mg/L), pH and contact time (0.5-6h) was investigated. The kinetic data modeling resulted in good correlations with the pseudo-second order and intraparticle diffusion models. The maximum sorption capacities of Pb(II) were 18.35, 21.29 and 22.7mg/L at 4, 20 and 50°C, respectively. Thermodynamic parameters indicated the spontaneity and endothermic nature of lead biosorption on rapeseed biomass. The biosorption mechanism involves both physical and chemical interactions. The breakthrough curves at 50 and 100mg/L were determined and evaluated under dynamic conditions. The breakthrough time lowered with increasing the influent Pb(II) concentration. The experimental data obtained from fixed-bed column tests were well fitted by Thomas and Yoon-Nelson models. The calculated sorption capacities were in good agreement with the uptake capacity of Langmuir model. The applicability of rapeseed to be used as a sorbent for Pb(II) ions from real wastewater was tested, and Pb(II) removal efficiency of 94.47% was obtained.
authors: Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 73 Prof. Dr. D. Mangeron Street, 700050, Iasi, Romania.
authors: Irina
authors: I
authors: Morosanu
authors: Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 73 Prof. Dr. D. Mangeron Street, 700050, Iasi, Romania. Electronic address: cteo@ch.tuiasi.ro.
authors: Carmen
authors: C
authors: Teodosiu
authors: Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 73 Prof. Dr. D. Mangeron Street, 700050, Iasi, Romania.
authors: Carmen
authors: C
authors: Paduraru
authors: Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 73 Prof. Dr. D. Mangeron Street, 700050, Iasi, Romania.
authors: Dumitrita
authors: D
authors: Ibanescu
authors: Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 73 Prof. Dr. D. Mangeron Street, 700050, Iasi, Romania.
authors: Lavinia
authors: L
authors: Tofan
mesh_terms: D000327:Adsorption; D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D018533:Biomass; D029741:Brassica rapa / Q000378:metabolism* / Q000648:ultrastructure; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis; D007477:Ions; D007700:Kinetics; D007854:Lead / Q000302:isolation & purification*; D008962:Models, Theoretical; D012996:Solutions; D013052:Spectrometry, X-Ray Emission; D013055:Spectrophotometry, Infrared; D013816:Thermodynamics; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
chemical_list: D007220:Industrial Waste; D007477:Ions; D007854:Lead; D012996:Solutions; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Batch conditions; Biosorption; Fixed-bed column; Lead; Rapeseed; Wastewater