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Preparation method and application of Fe-Cu binary oxide adsorbent for removing antimony

A binary oxide and adsorbent technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the difficulty of removing antimony, low adsorption capacity and adsorption selectivity, weak adsorption reaction activity, etc. To achieve the effect of improving the synergistic adsorption and removal capacity, the preparation method is simple, and the superior adsorption performance

Inactive Publication Date: 2018-07-20
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these adsorption materials have large specific surface area and strong adsorption capacity, and are often used to adsorb and remove heavy metals. However, these adsorption materials have disadvantages such as obvious swelling, weak adsorption reaction activity, low adsorption capacity and adsorption selectivity. Coupled with the special chemical properties of antimony, it has different morphological changes under different environmental (Eh-pH) conditions, which brings difficulties to the removal of antimony.

Method used

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  • Preparation method and application of Fe-Cu binary oxide adsorbent for removing antimony
  • Preparation method and application of Fe-Cu binary oxide adsorbent for removing antimony
  • Preparation method and application of Fe-Cu binary oxide adsorbent for removing antimony

Examples

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Embodiment 1

[0029] Example 1: Preparation method of Fe-Cu binary oxide adsorbent for removing antimony of the present invention

[0030] Add 20mmol iron nitrate (Fe(NO 3 ) 3 ) And 10mmol copper nitrate (Cu(NO 3 ) 2 ) Dissolve in 1L of oxygen-free deionized water, stir the two solutions vigorously with a magnetic stirrer at 1000 rpm, and add 5M NaOH aqueous solution dropwise to keep the pH at 7.00±0.02, and ultrasonicate the resulting mixture Disperse for 30 minutes, continue stirring the resulting suspension at 200 rpm for 0.8 hours, and aging for 5 hours at room temperature, so that an activated layer with strong adsorption capacity is formed on the surface of the adsorbent material, precipitates and solid-liquid separation, and then the brown precipitate is used to remove Wash with ionized water 5 times. The ratio of the volume of the washing water to the volume of the reaction system is 2:1 until the pH of the washed water is 7.0. The suspended solids are centrifuged to discard the superna...

Embodiment 2

[0031] Example 2: Preparation method of Fe-Cu binary oxide adsorbent for removing antimony of the present invention

[0032] Dissolve 4mmol of iron sulfate and 1mmol of copper sulfate in 1L of oxygen-free deionized water respectively, stir the two solutions vigorously with a magnetic stirrer at 1000rpm, and add 5M NaOH aqueous solution dropwise to keep the pH at 9.0. The resulting mixture was ultrasonically dispersed for 50 minutes, and the resulting suspension was stirred at 200 rpm for 1 hour, and aged for 7 hours at room temperature, so that an active layer with strong adsorption capacity was formed on the surface of the adsorbent material, which precipitated and separated solid and liquid. The brown precipitate was washed 5 times with deionized water, and the ratio of the volume of the washing water to the volume of the reaction system was 2:1 until the pH of the washed water was 7.0. The suspended solids were centrifuged to discard the supernatant and dried at 150°C (Vacuum ...

Embodiment 3

[0033] Example 3: Preparation method of Fe-Cu binary oxide adsorbent for removing antimony of the present invention

[0034] Dissolve 2mmol ferric chloride and 10mmol copper chloride in 1L of oxygen-free deionized water respectively, stir the two solutions vigorously with a magnetic stirrer at 1000rpm, and add 5M NaOH aqueous solution dropwise to keep the pH at 6.0 , Disperse the resulting mixture ultrasonically for 10 minutes, continue to stir the resulting suspension at 200 rpm for 0.5 hours, and age at room temperature for 3 hours, so that an active layer with strong adsorption capacity is formed on the surface of the adsorbent material, which precipitates and separates solid-liquid , And then wash the brown precipitate with deionized water 5 times. The ratio of the volume of the washing water to the volume of the reaction system is 2:1 until the pH of the washed water is 7.0. The suspended solids are centrifuged and the supernatant is discarded at 110°C. After drying (vacuum ...

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Abstract

The invention discloses a preparation method and application of an Fe-Cu binary oxide adsorbent for removing antimony. The adsorbent uses ferric salt and cupric salt as raw materials; a solution containing Fe ions and a solution containing Cu ions are mixed; then, full stirring is performed; a NaOH solution is used for regulating the pH; through coprecipitation, ultrasonic dispersion, aging, centrifugation, washing, drying, grinding and sieving, the Fe-Cu binary oxide adsorbent is obtained. The preparation process of the adsorbent is simple; high temperature and high pressure are not needed; the energy consumption is low; the conditions are easily controlled; the risk is low; the raw material cost is low. The adsorbent combines the advantages of ferric oxides and copper oxides; the adsorbent has many coarse micro adsorption pore passages and large specific surface areas; the surface has rich hydroxy; the cooperative adsorption capability on antimony is improved. The adsorbent can be applied to deep purification and safe control of antimony in wastewater.

Description

Technical field [0001] The invention belongs to the field of heavy metal polluted water treatment, and is especially suitable for the deep purification and safety control of antimony in industrial wastewater, domestic sewage, groundwater and sudden polluted wastewater. Specifically, it relates to a preparation method and application of an Fe-Cu binary oxide adsorbent for removing antimony. Background technique [0002] Antimony is highly toxic and harmful, and has strong biological toxicity to organisms. my country is known as the "Antimony Capital of the World". Antimony reserves and production are very rich. 80% of the world's antimony production comes from China. With the exploitation of antimony mines and the use of antimony products, antimony pollution in the environment has become more and more serious. In recent years, antimony pollution accidents have occurred frequently in China. Antimony has become a key element for the prevention and control of heavy metal pollution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/20
CPCB01J20/06C02F1/281C02F2101/20
Inventor 何孟常龙晓静褚建文王新
Owner BEIJING NORMAL UNIVERSITY
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