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PE20250288A1 - PROCEDURE FOR THE STABILIZATION OF ARSENIC BY THE PRECIPITATION OF FERRIC ARSENIATE IN MIXTURES WITH ALUMINUM GEL - Google Patents

PROCEDURE FOR THE STABILIZATION OF ARSENIC BY THE PRECIPITATION OF FERRIC ARSENIATE IN MIXTURES WITH ALUMINUM GEL

Info

Publication number
PE20250288A1
PE20250288A1 PE2024002740A PE2024002740A PE20250288A1 PE 20250288 A1 PE20250288 A1 PE 20250288A1 PE 2024002740 A PE2024002740 A PE 2024002740A PE 2024002740 A PE2024002740 A PE 2024002740A PE 20250288 A1 PE20250288 A1 PE 20250288A1
Authority
PE
Peru
Prior art keywords
arsenical
effluent
generate
residue
arsenic
Prior art date
Application number
PE2024002740A
Other languages
Spanish (es)
Inventor
Conte Ricardo Miguel Pezoa
Goycolea Marcelo Gustavo Acuna
Figueroa Guillermo Arturo Cornejo
Original Assignee
Ecometales Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ecometales Ltd filed Critical Ecometales Ltd
Publication of PE20250288A1 publication Critical patent/PE20250288A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • A62D3/33Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by chemical fixing the harmful substance, e.g. by chelation or complexation
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62DCHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
    • A62D3/00Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances
    • A62D3/30Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents
    • A62D3/38Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances by reacting with chemical agents by oxidation; by combustion
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

La invencion divulga un procedimiento para la estabilizacion de arsenico mediante la precipitacion de arseniato ferrico en mezclas con gel de aluminio, el procedimiento comprende las siguientes etapas: un primer paso i) de neutralizacion, en donde el efluente arsenical es contactado con un primer neutralizante para generar un primer efluente arsenical neutralizado; un segundo paso ii) de oxidacion, en donde el As(III) se oxida a As(V) por medio de la adicion de un primer oxidante, para generar un segundo efluente arsenical oxidado; un tercer paso iii) de ajuste de la relacion molar de Fe(III)/As(V), en donde el segundo efluente arsenical oxidado es mezclado con una primera solucion ferrica, para generar un tercer efluente arsenical; un cuarto paso iv) de precipitacion de arsenico, en donde se ajusta el pH del tercer efluente arsenical con un segundo neutralizante para generar una primera pulpa de residuo arsenical; un quinto paso v) de separacion solido liquido, en donde la primera pulpa de residuo arsenical obtenida del paso iv) se separa para generar un cuarto efluente arsenical y un primer residuo arsenical; y un sexto paso vi) de encapsulamiento, en donde el primer residuo arsenical obtenido en el paso v) se mezcla con un gel para generar un segundo residuo arsenical. La invencion resuelve el problema tecnico de generar residuos arsenicales estables que no requieren una etapa de estabilizacion termica para la generacion de un residuo arsenical estable.The invention discloses a process for stabilizing arsenic by precipitating ferric arsenate in mixtures with aluminum gel, the process comprising the following steps: a first neutralization step i) in which the arsenical effluent is contacted with a first neutralizer to generate a first neutralized arsenical effluent; a second oxidation step ii) in which As(III) is oxidized to As(V) by means of the addition of a first oxidant to generate a second oxidized arsenical effluent; a third step iii) of adjusting the Fe(III)/As(V) molar ratio, in which the second oxidized arsenical effluent is mixed with a first ferric solution to generate a third arsenical effluent; a fourth step iv) of arsenic precipitation, in which the pH of the third arsenical effluent is adjusted with a second neutralizer to generate a first arsenical residue pulp; a fifth step (v) of solid-liquid separation, wherein the first arsenical residue pulp obtained from step (iv) is separated to generate a fourth arsenical effluent and a first arsenical residue; and a sixth step (vi) of encapsulation, wherein the first arsenical residue obtained in step (v) is mixed with a gel to generate a second arsenical residue. The invention solves the technical problem of generating stable arsenical residues that do not require a thermal stabilization step for the generation of a stable arsenical residue.

PE2024002740A 2023-04-06 2023-04-06 PROCEDURE FOR THE STABILIZATION OF ARSENIC BY THE PRECIPITATION OF FERRIC ARSENIATE IN MIXTURES WITH ALUMINUM GEL PE20250288A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CL2023/050031 WO2024207127A1 (en) 2023-04-06 2023-04-06 Procedure for the stabilization of arsenic by precipitation of ferric arsenate in mixtures with aluminum gel

Publications (1)

Publication Number Publication Date
PE20250288A1 true PE20250288A1 (en) 2025-02-04

Family

ID=92970706

Family Applications (1)

Application Number Title Priority Date Filing Date
PE2024002740A PE20250288A1 (en) 2023-04-06 2023-04-06 PROCEDURE FOR THE STABILIZATION OF ARSENIC BY THE PRECIPITATION OF FERRIC ARSENIATE IN MIXTURES WITH ALUMINUM GEL

Country Status (4)

Country Link
CN (1) CN119301077A (en)
CA (1) CA3256748A1 (en)
PE (1) PE20250288A1 (en)
WO (1) WO2024207127A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4244927A (en) * 1979-07-27 1981-01-13 Hazen Research, Inc. Process for recovering arsenic compounds by sodium hydroxide leaching
JP3756687B2 (en) * 1999-01-29 2006-03-15 同和鉱業株式会社 Method for removing and fixing arsenic from arsenic-containing solutions
US7429551B2 (en) * 2001-08-27 2008-09-30 Calgon Carbon Corporation Adsorbents for removing heavy metals
EP2079544A4 (en) * 2006-04-14 2012-09-05 Nevada System Of Higher Education On Behalf Of The University Of Nevada Reno Board Of Regents ARSENABSORBING COMPOSITION AND METHOD OF USE
JP7265267B6 (en) * 2017-06-29 2023-05-19 ザ ロイヤル インスティチューション フォー ジ アドヴァンスメント オブ ラーニング/マギル ユニヴァーシティ Stabilization of harmful substances
US11220437B2 (en) * 2018-12-24 2022-01-11 Ecometales Limited Procedure for obtaining scorodite with a high arsenic content from acidic solutions with high content of sulfuric acid

Also Published As

Publication number Publication date
CA3256748A1 (en) 2025-02-04
WO2024207127A1 (en) 2024-10-10
CN119301077A (en) 2025-01-10

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