Sequencing batch biosorption of micropollutants from aqueous effluents by rapeseed waste: Experimental assessment and statistical modelling.

Irina Morosanu, Carmen Teodosiu, Adina Coroaba, Carmen Paduraru

Journal: Journal of environmental management 2019;230():110-118

PMID: 30278274

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Abstract

Rapeseed (RS) waste was used for sequential biosorption from aqueous solutions of two target micropollutants: lead ions and Reactive blue 19 (Rb19) dye, through an integrated approach, combining experimental assessment and statistical modeling. In both cases of sequential biosorption, a pseudo-second order kinetic model fitted the biosorption data well. Intraparticle diffusion proved to be the rate-limiting step in the sequential retention of both micropollutants. A selective desorption of metal ions and anionic dye at pH 2.5 and 10.5, respectively was observed. The quadratic models generated by response surface methodology (RSM) adequately described the sequential biosorption process and the desorption process, respectively. XPS and FTIR analysis indicated the mechanisms involved in the retention of target pollutants.

Address: Department of Environmental Engineering and Management, "Cristofor Simionescu" Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 73 Prof.Dr. D. Mangeron Street, 700050, Iasi, Romania.; Department of Environmental Engineering and Management, "Cristofor Simionescu" Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 73 Prof.Dr. D. Mangeron Street, 700050, Iasi, Romania. Electronic address: [email protected].; Centre of Advanced Research in Bionanoconjugates and Biopolymers, ''Petru Poni'' Institute of Macromolecular Chemistry, 41A Grigore Ghica-Voda Alley, 700487 Iasi, Romania.

DOI: 10.1016/j.jenvman.2018.09.075

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MeSH Terms: Brassica rapa, Diffusion, Hydrogen-Ion Concentration, Ions, Kinetics, Solutions