Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Sustainable approach for removal of reactive dyes: optimization of process performance and sorbent regeneration |
| Abstract | We investigated the removal of the reactive dye Remazol Red from segregated dye bath with an integrated physical-biological approach combining easy applicability and fast kinetics of the sorption process with intrinsic sustainability of biological treatments. The proposed process consists in a first step dye removal by sorption on a cheap commercial polymer (Hytrel 8206) followed by anaerobic polymer bioregeneration. Excellent dye removals were achieved (up to 100%) under acidic conditions with fast kinetics (in most cases, 4 h are sufficient to reach efficiencies >= 80%). Experimental sorption data were well correlated with the Freundlich isotherm and pseudo-first-order kinetic model. The sorption process was optimized with response surface methodology. Practically complete removal was achieved with pH of the solution, initial dye concentration and polymer-to-water ratio equal to 4, 50 mg/L and 8.03% v/v, respectively. High desorption performance under neutral conditions makes Hytrel suitable for bioregeneration in a two-phase partitioning bioreactor. Polymer bioregeration reached 82% efficiency with the added value of achieving effective biodegradation (> 50% in 4 days) of the dye desorbed from the polymer. The study demonstrated the two-step process feasibility, which is characterized by the advantage of employing a cheap commercial polymer and has the potential of achieving complete dye mineralization. |
| Source | International journal of environmental science and technology (Tehran, Online) |
| Keywords | Reactive dyesTwo-step processPolymer regenerationSorptionBioregenerationPolymer reuse |
| Journal | International journal of environmental science and technology (Tehran, Online) |
| Editor | Iranian Society of Environmentalists, Center for Environment and Energy Research and Studies, Tehran, Iran |
| Year | 2023 |
| Type | Articolo in rivista |
| DOI | 10.1007/s13762-023-05095-1 |
| Authors | Domenica Mosca Angelucci; Valentina Stazi; M. Concetta Tomei |
| Text | 487620 2023 10.1007/s13762 023 05095 1 Reactive dyes Two step process Polymer regeneration Sorption Bioregeneration Polymer reuse Sustainable approach for removal of reactive dyes optimization of process performance and sorbent regeneration Domenica Mosca Angelucci; Valentina Stazi; M. Concetta Tomei Water Research Institute, National Research Council IRSA CNR , Via Salaria km 29.300, CP 10, Monterotondo Stazione, Rome, 00015 We investigated the removal of the reactive dye Remazol Red from segregated dye bath with an integrated physical biological approach combining easy applicability and fast kinetics of the sorption process with intrinsic sustainability of biological treatments. The proposed process consists in a first step dye removal by sorption on a cheap commercial polymer Hytrel 8206 followed by anaerobic polymer bioregeneration. Excellent dye removals were achieved up to 100% under acidic conditions with fast kinetics in most cases, 4 h are sufficient to reach efficiencies >= 80% . Experimental sorption data were well correlated with the Freundlich isotherm and pseudo first order kinetic model. The sorption process was optimized with response surface methodology. Practically complete removal was achieved with pH of the solution, initial dye concentration and polymer to water ratio equal to 4, 50 mg/L and 8.03% v/v, respectively. High desorption performance under neutral conditions makes Hytrel suitable for bioregeneration in a two phase partitioning bioreactor. Polymer bioregeration reached 82% efficiency with the added value of achieving effective biodegradation > 50% in 4 days of the dye desorbed from the polymer. The study demonstrated the two step process feasibility, which is characterized by the advantage of employing a cheap commercial polymer and has the potential of achieving complete dye mineralization. Published version https //link.springer.com/article/10.1007/s13762 023 05095 1 Articolo in rivista Iranian Society of Environmentalists, Center for Environment and Energy Research and Studies 1735 2630 International journal of environmental science and technology Tehran, Online International journal of environmental science and technology Tehran, Online Int. j. environ. sci. technol. Tehran, Online International journal of environmental science and technology. Tehran, Online International Journal of Environmental Science Technology Tehran. Online Tehran, Online STAZI VALENTINA domenica.moscaangelucci MOSCA ANGELUCCI DOMENICA mariaconcetta.tomei TOMEI MARIA CONCETTA TA.P07.002.005 Rimozione di composti xenobiotici da acque di scarico |