Magnetic composite functional material for high efficiency removal of Congo red in water and preparation method thereof

A composite function, Congo red technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problem that it is difficult to apply Congo red to strong acid conditions, and modified adsorbents cannot efficiently treat high concentrations of Congo red, etc. problem, to achieve the effect of low cost, no secondary pollution, and strong operability

Inactive Publication Date: 2017-10-20
XIANGTAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] The invention provides a magnetic composite functional material with a high removal rate of Congo red in water and a preparation method thereof, which solves the problem that biological methods are difficult to apply to the strong acidic conditions of Congo red production wastewater, such as adjusting the pH value of the original wastewater to neutral regeneration Method treatment increases the complexity of the treatment process and its cost burden; it also solves the problem that the existing modified adsorbents cannot efficiently treat the actual production wastewater with high concentration of Congo red

Method used

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  • Magnetic composite functional material for high efficiency removal of Congo red in water and preparation method thereof
  • Magnetic composite functional material for high efficiency removal of Congo red in water and preparation method thereof
  • Magnetic composite functional material for high efficiency removal of Congo red in water and preparation method thereof

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Embodiment 1

[0027] 1. Preparation of magnetic composite functional materials:

[0028](1) Purified sepiolite is obtained by washing and drying the original sepiolite soil. Take a certain amount of purified sepiolite that has been ground and passed through a 50-200 mesh sieve and put it in a crucible, and then heat it in a muffle furnace at 200-300°C. Modified for 1-4 hours, after cooling, thermally modified sepiolite was obtained;

[0029] (2) Weigh 8-15g of thermally modified sepiolite and add it to a 150mL conical flask, using FeCl 3 ·6H 2 O prepare 250mL of Fe with a concentration of 0.05-0.2mol / L 3+ solution, using FeSO 4 ·7H 2 O prepare 250mL of Fe with a concentration of 0.025-0.1mol / L 2 + solution, and the formulated Fe 3+ and Fe 2+ Take 50mL of each solution, add a total of 100mL iron mixed solution into the above-mentioned Erlenmeyer flask, shake at room temperature for 1-2h, then place it in a constant temperature water bath shaker and heat it to 50-80°C, then add 1mol / L...

Embodiment 2

[0035] The experiment of verifying the flocculation effect of the magnetic composite functional material: According to the mechanism experiment, it is verified that the material is dominated by electrostatic attraction, so the pH value plays a leading role in the treatment effect.

[0036] Under the condition of pH=1-3.5, configure 200mg / L, 400mg / L, 600mg / L, 800mg / L, 1000mg / L, 1200mg / L, 1400mg / L, 1600mg / L, 2000mg / L, 2500mg / L L, 3000mg / L, 3500mg / L, 4000mg / L, Congo red solution of 4500mg / L, add the above-mentioned organically modified magnetic sepiolite and Congo red solution in the conical flask according to the dosage of 1g / L, place In a constant temperature water bath box at 30°C, after 5.0 hours of treatment until the reaction is basically balanced, the remaining concentration is measured by an ultraviolet-visible spectrophotometer (dilution by an appropriate multiple to make the remaining concentration within the concentration range of 0-50mg / L), and then measured by the sta...

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Abstract

The invention discloses a magnetic composite functional material with both adsorption and flocculation effects for high efficiency removal of Congo red in water and a preparation method thereof, and belongs to the technical field of dye wastewater treatment. The magnetic composite functional material is prepared by compounding three components of sepiolite, Fe3O4 and cetyl trimethyl ammonium bromide (CTAB). The preparation method is as follows: purified sepiolite is thermally modified, a bivalent and trivalent iron ion mixed solution is added for magnetic modification, and a cetyl trimethyl ammonium bromide (CTAB) solution is added for organic modification to obtain organically-modified magnetic sepiolite, namely the magnetic composite functional material. The preparation method has the advantages of low cost, simple operation and strong operability. The magnetic composite functional material is applied to the treatment of Congo red model wastewater, the concentration range is 100-4500mg / L, under the optimized conditions, the maximum removal capacity of the Congo red is 4478.92mg / g, and the removal rate is 96.49%-99.92%.

Description

technical field [0001] The invention relates to a magnetic composite functional material with a high removal rate of Congo red in water and a preparation method thereof, in particular to an organically modified magnetic sepiolite composite functional material with a high removal rate of Congo red in water. The invention relates to a novel magnetic composite functional material with both adsorption and flocculation functions, and belongs to the technical field of dye wastewater treatment. Background technique [0002] There are many organic substances and intermediates produced in the printing and dyeing industry. The organic components of dye wastewater are complex, highly toxic, difficult to be biodegraded, and have three effects; The complex structure and various forms of aromatic ring isomers make many dyes toxic and non-biodegradable, and their direct discharge into the environment will cause serious impact. Congo red is a typical benzidine-type direct azo anionic dye. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/52C02F101/34C02F101/38
CPCB01J20/06B01J20/12B01J20/22B01J20/28009C02F1/288C02F1/52C02F2101/308C02F2101/34C02F2101/38C02F2101/40
Inventor 戴友芝陈润泽马玉
Owner XIANGTAN UNIV
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