The present description relates to a method and a system for generating a Fenton reagent. Particularly, the description relates to a method and a system for oxidizing contaminants from wastewater. The Fenton reagent can react with various organic compounds and metallic elements. The method of producing an in-situ Fenton reagent comprises: providing an aqueous solution comprising at least one contaminant; providing at least one column comprising i) an inlet and an outlet separated by a flow chamber, and ii) a mass of iron fibre in the flow chamber between the inlet and the outlet; providing at least one dispenser retaining a hydrogen peroxide generating solid and permitting passage of the aqueous solution through the dispenser; optionally acidifying the solution upstream of the at least one column, and passing the aqueous solution through the at least one column.
B22F 1/00 - Poudres métalliquesTraitement des poudres métalliques, p. ex. en vue de faciliter leur mise en œuvre ou d'améliorer leurs propriétés
C02F 1/72 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par oxydation
C02F 9/00 - Traitement en plusieurs étapes de l'eau, des eaux résiduaires ou des eaux d'égout
C02F 103/16 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de procédés métallurgiques, c.-à-d. de la production, de la purification ou du traitement de métaux, p. ex. déchets de procédés électrolytiques
C02F 101/34 - Composés organiques contenant de l'oxygène
C02F 101/22 - Chrome ou composés du chrome, p. ex. chromates
2.
METHOD AND SYSTEM FOR PREPARING A FENTON FE2+/H2O2 REAGENT
The present description relates to a method and a system for generating a Fenton reagent. Particularly, the description relates to a method and a system for oxidizing contaminants from wastewater. The Fenton reagent can react with various organic compounds and metallic elements. The method of producing an in-situ Fenton reagent comprises: providing an aqueous solution comprising at least one contaminant; providing at least one column comprising i) an inlet and an outlet separated by a flow chamber, and ii) a mass of iron fibre in the flow chamber between the inlet and the outlet; providing at least one dispenser retaining a hydrogen peroxide generating solid and permitting passage of the aqueous solution through the dispenser; optionally acidifying the solution upstream of the at least one column, and passing the aqueous solution through the at least one column.
The present invention relates to method and a system of reducing chromium (VI) from a chromium bearing solution. The reduction of the chromium (VI) is achieved by contacting the chromium bearing solution which comprises chromium (VI) ions in an aqueous solution with iron fibers in an exchange mass under oxidation-reduction potential conditions at a pH of at least 2.5, with entry of iron ions into solution in the aqueous solution and reduction of the chromium (VI) ions to chromium (III) recovered in the exchange mass. A solution substantially free of chromium (VI) ions and total chromium is produced and discharged from the exchange mass.
The present invention relates to method and a system of reducing chromium (VI) from a chromium bearing solution. The reduction of the chromium (VI) is achieved by contacting the chromium bearing solution which comprises chromium (VI) ions in an aqueous solution with iron fibres in an exchange mass under oxidation-reduction potential conditions at a pH of at least 2.5, with entry of iron ions into solution in the aqueous solution and reduction of the chromium (VI) ions to chromium (III) recovered in the exchange mass. A solution substantially free of chromium (VI) ions and total chromium is produced and discharged from the exchange mass.
The present invention relates to method and a system of reducing chromium (VI) from a chromium bearing solution. The reduction of the chromium (VI) is achieved by contacting the chromium bearing solution which comprises chromium (VI) ions in an aqueous solution with iron fibres in an exchange mass under oxidation-reduction potential conditions at a pH of at least 2.5, with entry of iron ions into solution in the aqueous solution and reduction of the chromium (VI) ions to chromium (III) recovered in the exchange mass. A solution substantially free of chromium (VI) ions and total chromium is produced and discharged from the exchange mass.
09 - Appareils et instruments scientifiques et électriques
11 - Appareils de contrôle de l'environnement
35 - Publicité; Affaires commerciales
37 - Services de construction; extraction minière; installation et réparation
39 - Services de transport, emballage et entreposage; organisation de voyages
40 - Traitement de matériaux; recyclage, purification de l'air et traitement de l'eau
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Electrolyptic and ion exchange equipment namely machine to recover silver from photo chemistry, films, negatives, x-rays, spent fixing solutions and other precious metals namely from dental scrap electronic components, printed circuit boards, jewellers sweeps.
(2) Silver recovery and fixer reduction systems composed of all or some of the following: a unit chemically reducing and electrolytically recovering silver, reducing new fixer consumption and regulating its use, metal ion exchange media which recovers silver by attracting silver particles from fixer chemistry and/or a photochemical filter retaining particles from used fixer and balancing its pH when combined with developer.
(3) Ion exchange systems and products for treating and reducing processing effluents, namely: water manager, namely a unit continuously circulating water, metering out the spent wash water and controlling bio-slime by automatically adding a non-toxic solution that keeps the wash water clean and clear; an electrolytic fixer, namely a fixing solution which includes a preservative to allow the chemistry to last longer and permits a greater reduction of the replenishment rate comparing to a regular type of fixer. (1) Buying and selling of photographic film, screenprinting film, x-ray, aluminum plates and other metals.
(2) Marketing of electrolytic and ion exchange systems and products for processing effluent.
(3) Silver and precious metals recovery system namely harvesting precious metals from said equipment, maintenance, servicing and repairing said equipment, stripping silver from photographic films.
(4) Stripping silver from screenprinting film and x-ray.
(5) Maintenance, harvesting and repairing of electrolytic and ion exchange systems and products for processing effluent.
(6) Hauling and handling of jewelers sweeps.
(7) Hauling, handling and storage of photographic film, screenprinting film, x-ray, aluminum plates and other metals.
(8) Hauling and handling of chemical solutions.
(9) Manufacturing of electrolytic and ion exchange systems and products for processing effluent; smelting operation for refining silver.
(10) Designing of electrolytic and ion exchange systems and products for processing effluent.
