title: Valorization of Romanian silver fir tree bark (Abies alba Mill.) wastes as low-cost sorbent of Cu(II) ions from polluted waters.
abstract: Considering recycling as the first option in the hierarchy of sustainable waste management, and also the demand for efficient processes for wastewater treatment with reduced costs, the potential applicability of Romanian Abies alba bark, the main waste from the industrial processing of the wood of mature silver fir trees, as sorbent for Cu(II) has been studied in batch conditions. It was observed that the extent of Cu(II) sorption is strongly dependent on initial solution pH, sorbent dose, initial Cu(II) ion concentration, temperature and contact time. Equilibrium data fitted very well with both Langmuir and Freundlich isotherm models. The Langmuir maximum sorption capacity of Cu(II) ions on Abies alba bark waste was found to be 7.80 mg/g at 293 K. Kinetic studies showed a high affinity of the sorption experimental data to the pseudo-second order model. Gibbs free energy was spontaneous for all interactions and the sorption process exhibited endothermic enthalpy value. The waste of Abies alba bark was successfully used for the sorption removal of Cu(II) ions from industrial electroplating wastewaters.
authors.affiliation: Environmental Engineering and Management Department, 'Gheorghe Asachi' Technical University of Iasi, 71A D. Mangeron Street, Iasi 700050, Romania E-mail: cpadur2005@yahoo.com.
authors.forename: Lavinia
authors.initials: L
authors.lastname: Tofan
authors.affiliation: Environmental Engineering and Management Department, 'Gheorghe Asachi' Technical University of Iasi, 71A D. Mangeron Street, Iasi 700050, Romania E-mail: cpadur2005@yahoo.com.
authors.forename: Carmen
authors.initials: C
authors.lastname: Paduraru
authors.affiliation: The Commercial Society for Medicinal Plant Research and Processing Plantavorel, Cuza Voda Str. 46, Piatra Neamt 610019, Romania.
authors.forename: Roxana Laura Mihailescu
authors.initials: RL
authors.lastname: Amalinei
authors.affiliation: 'Petru Poni' Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Street, Iasi 700487, Romania.
authors.forename: Ion
authors.initials: I
authors.lastname: Bunia
authors.affiliation: Department of Pharmacognosy, School of Pharmacy, 'Gr. T. Popa' University of Medicine and Pharmacy, Universitatii Str. 16, Iasi 700115, Romania.
authors.forename: Anca
authors.initials: A
authors.lastname: Miron
mesh_terms: D028202:Abies; D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D003365:Costs and Cost Analysis; D007700:Kinetics; D008962:Models, Theoretical; D024301:Plant Bark / Q000737:chemistry*; D059027:Recycling / Q000191:economics / Q000379:methods; D013696:Temperature; D013816:Thermodynamics; D014865:Waste Disposal, Fluid / Q000191:economics / Q000379:methods; D014866:Waste Products; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014866:Waste Products; D014874:Water Pollutants, Chemical; D003300:Copper