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Magnetic adsorption material, preparation of magnetic adsorption material and method for treating thallium-containing wastewater

A magnetic adsorption material and waste water technology, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the high cost of thallium element material treatment, high input cost, unstable thallium removal effect, etc. question

Active Publication Date: 2019-02-12
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the existing wastewater thallium removal technology does not have the functions of enrichment, concentration and recovery of thallium element, making the thallium removal material a hazardous waste with higher processing costs
In addition, the existing wastewater thallium removal technology uses high reagent and material input costs, and the thallium removal effect is unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The magnetic adsorption material contains manganese ferrite and manganese dioxide, manganese dioxide (MnO 2 ) and manganese ferrite (MnFe 2 o 4 ) The mass ratio is 1:5.

[0019] The preparation method of the magnetic adsorption material is as follows: dissolve 12.10g (0.07mol) manganese acetate in 50ml distilled water, add 29.42g (0.14mol) citric acid to dissolve, add water to dilute to 100ml, adjust the pH value of the solution to 5.0~6.0 with ammonia water In between, add 30.45g manganese ferrite, stir evenly, ultrasonically treat for 30min to make it evenly mixed, spread it in a petri dish and put it in an oven to dry, grind it and roast it to get manganese dioxide loaded manganese ferrite, Save, spare, and make production records at the same time.

[0020] Wastewater sample 1: select desulfurization wastewater from the iron and steel industry with a thallium ion content of 950.0 μg / L and pH=6~7.

[0021] Experimental preparation: Add 10mg, 20mg, 30mg, 40mg and 5...

Embodiment 2

[0046] The magnetic adsorption material contains manganese ferrite and manganese dioxide, manganese dioxide (MnO 2 ) and manganese ferrite (MnFe 2 o 4 ) The mass ratio is 1:6.

[0047]The preparation method of the magnetic adsorption material is as follows: dissolve 12.10g (0.07mol) manganese acetate in 50ml distilled water, add 29.42g (0.14mol) citric acid to dissolve, add water to dilute to 100ml, adjust the pH value of the solution to 5.0~6.0 with ammonia water In between, add 36.54g manganese ferrite, stir evenly, ultrasonically treat for 30 minutes to make it evenly mixed, spread it in a petri dish and put it in an oven to dry, grind it and roast it to get manganese dioxide loaded manganese ferrite, Save, spare, and make production records at the same time.

[0048] For waste water sample 1: the treatment of waste water sample 3 with a magnetic adsorption material is the same as in Example 1.

[0049] The treated water was tested and the content of thallium ions was m...

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Abstract

The invention discloses a magnetic adsorption material, preparation of the magnetic adsorption material and a method for treating thallium-containing wastewater. The magnetic adsorption material is manganese dioxide loaded manganese ferrite. The preparation method is characterized in that manganese acetate is dissolved in water; citric acid is added for dissolution and dilution; manganese ferriteis added; after uniform mixing, drying, crushing and roasting are performed, the magnetic adsorption material can be obtained. The method for treating thallium-containing wastewater by using the magnetic adsorption material is characterized in that 1, the manganese dioxide loaded manganese ferrite is added into thallium-containing industrial wastewater; the magnetic adsorption material adsorbs thethallium in the industrial wastewater; 2, an external magnetic field is used for attracting the magnetic adsorption material attached with the thallium; 3, solid liquid separation is performed; supernate is treated water removing the thallium element. The process for recovering the thallium element by the magnetic adsorption material is characterized in that nitric acid is added into the magnetic adsorption material attached with the thallium for regulating the pH value; the external magnetic field attracts the magnetic adsorption material completing the desorption; solid and liquid separation is performed; the supernate is enriched recovery liquid concentrating the thallium element.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a manganese dioxide (MnO 2 ) loaded manganese ferrite (MnFe 2 o 4 ) Magnetic adsorption materials and their preparation and application. Background technique [0002] Thallium (Tl) is a scattered element in the earth's crust, often associated with iron, zinc, copper and other metal sulfide ores, and also exists in coal fields and petroleum in the form of organic matter. Both thallium and its compounds exhibit high-intensity biological toxicity, and are even more toxic to mammals than heavy metals such as lead and mercury. damage. [0003] At present, my country's demand for mineral resources is increasing, and the mining scale of low-temperature deposits associated with thallium continues to expand, causing serious thallium pollution problems. In recent years, there have been many thallium pollution incidents with great influence in my country. In 2010, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28C02F1/28B01J20/30
CPCB01J20/06B01J20/28009C02F1/281
Inventor 皇甫小留孙莉莉王海楠何强刘彩虹邹依洁刘巨超
Owner CHONGQING UNIV
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