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Manganese activated amorphous iron-based adsorption agent preparation method

An adsorbent, iron-based technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve problems such as high environmental sensitivity, poor material stability, and difficult solid-liquid separation, and achieve the cost of preparation The effect of low, strong stability, and cheap raw materials

Active Publication Date: 2019-02-01
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other adsorption materials, layered two-phase hydroxides, especially layered iron-based two-phase hydroxides, are widely used in the treatment of heavy metal ions in industrial wastewater due to their layered structure similar to hydrotalcite, but for Hexavalent chromium, pentavalent arsenic, pentavalent antimony cation waste liquid, layered iron-based dual-phase hydroxides have problems such as low adsorption capacity, high environmental sensitivity, poor material stability, difficult solid-liquid separation, and low recovery rate

Method used

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  • Manganese activated amorphous iron-based adsorption agent preparation method
  • Manganese activated amorphous iron-based adsorption agent preparation method
  • Manganese activated amorphous iron-based adsorption agent preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The effect of the mass ratio of sodium hydroxide and montmorillonite powder on the removal of hexavalent chromium, pentavalent arsenic and pentavalent antimony ions in water:

[0030] like figure 1 Shown, is the preparation process of manganese-activated amorphous iron-based adsorbent, specifically:

[0031] (1) Preparation of alkaline pulp: weigh sodium hydroxide and montmorillonite powder respectively according to the mass ratio of 0.75:10, 1.0:10, 1.25:10, and 1.5:10, dissolve in distilled water, and stir for 20 minutes at 30 rpm;

[0032] (2) Preparation of alkaline ore powder: place the alkaline ore slurry in an oven and dry at 100°C to constant weight;

[0033] (3) Preparation of mixed iron-based solution: take ferrous sulfate and ferric sulfate respectively by weighing ferrous sulfate and ferric sulfate according to the mol ratio of Fe(II) of ferrous sulfate and Fe(III) of ferric sulfate to 3:1, press ferrous sulfate and sulfuric acid The solid-to-liquid ratio ...

Embodiment 2

[0043] The effect of the molar ratio of Fe(II) to Fe(III) on the removal of hexavalent chromium, pentavalent arsenic and pentavalent antimony ions in water:

[0044] Preparation process is with embodiment 1, and embodiment 1 difference is:

[0045] (1) Preparation of alkaline pulp: the mass ratio of sodium hydroxide and montmorillonite powder is 1.5:10, dissolved in distilled water, stirred for 15min at 40rpm;

[0046] (2) Preparation of alkaline ore powder: drying the alkaline ore pulp in an oven at 125°C;

[0047] (3) Preparation of mixed iron-based solution: the molar ratios of Fe(II) to Fe(III) are 3:1, 3.5:1, 4:1, 4.5:1, 5:1, ferrous sulfate and ferric sulfate The solid-to-liquid ratio of the total mass of distilled water to 2.5g:10mL;

[0048] (4) Preparation of manganese-doped lye: OH - The molar ratio to Fe(II)+Fe(III) is 2.5:1, and the mass ratio of potassium permanganate to alkaline mineral powder is 5.5:100;

[0049] (5) Preparation of iron-adsorbed pulp: the so...

Embodiment 3

[0057] Oh - The influence of the molar ratio of Fe(II)+Fe(III) on the removal of hexavalent chromium, pentavalent arsenic and pentavalent antimony ions in water:

[0058] Preparation process is with embodiment 1, and embodiment 1 difference is:

[0059] (1) Preparation of alkaline pulp: the mass ratio of sodium hydroxide and montmorillonite powder is 1.5:10, dissolved in distilled water, stirred for 10min at 50rpm;

[0060] (2) Preparation of alkaline ore powder: drying the alkaline ore pulp in an oven at 150°C;

[0061] (3) Preparation of mixed iron-based solution: the molar ratio of Fe(II) to Fe(III) is 4.5:1, and the solid-liquid ratio of the total mass of ferrous sulfate and ferric sulfate to distilled water is 3g:10mL;

[0062] (4) Preparation of manganese-doped lye: OH - The molar ratios to Fe(II)+Fe(III) are 2:1, 2.25:1, 2.5:1, 2.75:1, 3:1 respectively, and the mass ratio of potassium permanganate to alkaline mineral powder is 10:100;

[0063] (5) Preparation of iro...

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Abstract

The invention discloses a manganese activated amorphous iron-based adsorption agent preparation method. The method includes steps: (1) weighing sodium hydroxide and montmorillonite powder, dissolvinginto water, and mixing and stirring to obtain alkaline pulp; (2) drying the alkaline pulp in a drying oven to obtain alkaline mineral powder; (3) weighing ferrous sulfate and iron sulfate, mixing in water, and hermetically stirring to dissolve completely to obtain mixed iron-based solution; (4) weighing sodium hydroxide and potassium permanganate, and mixing in water to dissolve to obtain manganese-doped alkaline liquid; (5) mixing alkaline mineral powder with the mixed iron-based solution, and hermetically stirring to obtain iron adsorption pulp; (6) mixing the manganese-doped alkaline liquidwith the iron adsorption pulp, and hermetically stirring to obtain manganese activated amorphous iron-based pulp; (7) adding the manganese activated amorphous iron-based pulp into a vacuum drying oven, vacuumizing and drying to a constant weight, and grinding to obtain a manganese activated amorphous iron-based adsorption agent. By adoption of the adsorption agent prepared according to the method, high capacity in adsorption of chromium, arsenic and antimony ions in water in pH of 3-12 is realized.

Description

technical field [0001] The invention relates to a method for preparing an adsorbent for industrial wastewater metal ions, in particular to a method for preparing a manganese-activated amorphous iron-based adsorbent. Background technique [0002] Chromium, arsenic, and antimony ions are toxic and harmful pollutants in industrial wastewater, and excessive intake will cause obvious acute toxicity to organisms. Adsorption technology has been widely used in the field of sewage treatment because of its low cost and convenient operation. Although pollutant types, concentrations, ionic strength, water pH, and water environment all have certain effects on the adsorption process, the type of adsorbent and its performance have the most critical influence on the adsorption process and water purification effect. The commonly used adsorbents currently used to remove chromium, arsenic, and antimony ions in water include zero-valent iron, mafite, magnetite, hematite, titanium dioxide, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/20
CPCB01J20/041B01J20/12C02F1/281C02F2101/20
Inventor 黄涛宋东平刘龙飞周璐璐徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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