Recovery of Hydrochloric Acid from Industrial Wastewater by Diffusion Dialysis Using a Spiral-Wound Module
| Autor: | Arthur Merkel, Ladislav Čopák, Daniil Golubenko, Lukáš Dvořák, Matej Vavro, Andrey Yaroslavtsev, Libor Šeda |
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| Rok vydání: | 2022 |
| Předmět: |
Organic Chemistry
acid recovery anion-exchange homogeneous membrane soluble salts metallic chlorides membrane stability techno-economic study wastewater General Medicine Wastewater Catalysis Computer Science Applications Inorganic Chemistry Renal Dialysis Metals Heavy Salts Hydrochloric Acid Physical and Theoretical Chemistry Acids Molecular Biology Spectroscopy |
| Zdroj: | International Journal of Molecular Sciences; Volume 23; Issue 11; Pages: 6212 |
| ISSN: | 1422-0067 |
| DOI: | 10.3390/ijms23116212 |
| Popis: | In the present study, the possibility of using a spiral-wound diffusion dialysis module was studied for the separation of hydrochloric acid and Zn2+, Ni2+, Cr3+, and Fe2+ salts. Diffusion dialysis recovered 68% of free HCl from the spent pickling solution contaminated with heavy-metal-ion salts. A higher volumetric flowrate of the stripping medium recovered a more significant portion of free acid, namely, 77%. Transition metals (Fe, Ni, Cr) apart from Zn were rejected by >85%. Low retention of Zn (35%) relates to the diffusion of negatively charged chloro complexes through the anion-exchange membrane. The mechanical and transport properties of dialysis FAD-PET membrane under accelerated degradation conditions was investigated. Long-term tests coupled with the economic study have verified that diffusion dialysis is a suitable method for the treatment of spent acids, the salts of which are well soluble in water. Calculations predict significant annual OPEX savings, approximately up to 58%, favouring diffusion dialysis for implementation into wastewater management. |
| Databáze: | OpenAIRE |
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