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Evaluation of the adsorptive performances of rapeseed waste in the removal of toxic metal ions in aqueous media

Show simple item record Arsenie, Teodora-Daniela Coroi Cara, Irina-Gabriela Popescu, Maria-Cristina Motrescu, Iuliana Bulgariu, Laura 2024-06-07T11:19:44Z 2024-06-07T11:19:44Z 2022-12-16
dc.identifier.citation Arsenie, Teodora, Irina Gabriela Cara, Maria-Cristina Popescu, Iuliana Motrescu, and Laura Bulgariu. 2022. "Evaluation of the Adsorptive Performances of Rapeseed Waste in the Removal of Toxic Metal Ions in Aqueous Media". Water 14, no. 24: 4108. en_US
dc.description.abstract Rapeseed seeds are one of the most important categories of raw materials used to obtain biofuels. However, the biomass resulting after oil extraction is still considered waste, for which valorization solutions are sought. In this study, we propose the use of this type of residual biomass (rapeseed waste biomass (RWB)) as a biosorbent for the removal of toxic metal ions from aqueous media. Two toxic metal ions were selected for the experimental studies, namely: Pb(II) and Hg(II). The optimal biosorption conditions, for both metal ions, were selected based on response surface methodology and were verified experimentally in batch systems. More than 92% of the initial amount of Pb(II) and Hg(II) are retained under the following conditions: pH = 6.5 for Pb(II) and 4.0 for Hg(II); biosorbent dosage = 4.0 g/L; contact time = 3 h; temperature = 25 1 C. Isotherm (Langmuir, Freundlich and Temkin models) and kinetic (pseudo-first order, pseudo-second order and intra-particle diffusion models) modelling of the experimental data were used for the quantitative evaluation of both biosorption processes. Although the Langmuir maximum biosorption capacities are different (higher in the case of Pb(II) (61.97 mg/g) than in the case of Hg(II) (51.32 mg/g)), the pseudo-second order kinetic constants have the same order of magnitude. This shows that the retention of both metal ions involves similar elementary steps and that RWB behaves as a typical biosorbent. These characteristics, together with the very good desorption behavior, provide a complete picture of the possible applications of this waste in environmental decontamination processes. en_US
dc.language.iso en en_US
dc.publisher MDPI en_US
dc.rights Attribution 4.0 International (CC BY 4.0)
dc.subject rapeseed waste biomass en_US
dc.subject biosorption en_US
dc.subject Pb(II) and Hg(II) ions en_US
dc.subject isotherm modelling en_US
dc.subject kinetic modelling en_US
dc.title Evaluation of the adsorptive performances of rapeseed waste in the removal of toxic metal ions in aqueous media en_US
dc.type Article en_US Teodora Arsenie, Laura Bulgariu, Department of Environmental Engineering and Management, “Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, Gheroghe Asachi Technical University of Iași, 700050 Iași, Romania Irina Gabriela Cara, Research Institute for Agriculture and Environment, “Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, 700490 Iași, Romania Maria-Cristina Popescu, Laboratory of Physical Chemistry of Polymers, Petru Poni Institute of Macromolecular Chemistry, 700506 Iași, Romania Iuliana Motrescu, Faculty of Agriculture, “Ion Ionescu de la Brad” University of Agricultural Sciences and Veterinary Medicine, Aleea M. Sadoveanu Street, No. 3, 700490 Iași, Romania
dc.publicationName Water
dc.volume 14
dc.issue 24
dc.publicationDate 2022
dc.identifier.eissn 2073-4441
dc.identifier.doi 10.3390/w14244108

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Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)