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Activated carbon supporting ferric oxyhydroxide composite adsorbent, and preparation and application thereof

An iron oxyhydroxide and composite adsorption technology, which is applied in adsorption water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve the problems of low adsorption efficiency of activated carbon, expensive materials, poor removal effect, etc. Recycling, high load rate and low cost of raw materials

Inactive Publication Date: 2018-04-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor removal effect of existing methods for removing bromate in water, expensive materials used, and low adsorption efficiency of activated carbon, the invention provides an activated carbon-supported iron oxyhydroxide composite adsorbent and a preparation method thereof

Method used

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  • Activated carbon supporting ferric oxyhydroxide composite adsorbent, and preparation and application thereof
  • Activated carbon supporting ferric oxyhydroxide composite adsorbent, and preparation and application thereof
  • Activated carbon supporting ferric oxyhydroxide composite adsorbent, and preparation and application thereof

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Embodiment 1

[0034] A preparation method of activated carbon loaded iron oxyhydroxide composite adsorbent, comprising the following steps:

[0035] (1) Ultrasonicate 30g of activated carbon in 1L of 60wt% acetic acid solution (power 200W, frequency 100KHz, time 30min), seal, magnetically stir for 24h, change the water to boil, wash, change the water to boil, repeat this until the filtrate after the activated carbon is washed Clear and transparent, dry, and calcined at 500°C for 24 hours to obtain pretreated activated carbon; the boiling time for each boiling is 10 minutes; the drying temperature is 80°C;

[0036] (2) Mix 3g of pretreated activated carbon with 50mL of 0.001mol / L FeCl 3 The solution was stirred for 15 minutes, sealed, soaked and reacted at 100° C. for 10 hours, washed, and dried to constant weight (the drying temperature was 70° C.) to obtain an activated carbon-loaded iron oxyhydroxide composite adsorbent. The loading rate of iron oxyhydroxide in this embodiment is 2.03%. ...

Embodiment 2

[0038] A preparation method of activated carbon loaded iron oxyhydroxide composite adsorbent, comprising the following steps:

[0039] (1) Ultrasonicate 30g of activated carbon in 1L of 60wt% acetic acid solution (power 200W, frequency 100KHz, time 30min), seal, magnetically stir for 24h, change the water to boil, wash, change the water to boil, repeat this until the filtrate after the activated carbon is washed Clear and transparent, dry, and calcined at a high temperature of 500°C for 24 hours to obtain pretreated activated carbon; each time of boiling in the boiling is 15min; the drying temperature is 70°C;

[0040] (2) Mix 3g of pretreated activated carbon with 50mL of 0.01mol / L FeCl 3 The solution was stirred for 15 minutes, sealed, soaked and reacted at 140° C. for 15 hours, washed, and dried to constant weight (the drying temperature was 70° C.) to obtain an activated carbon-loaded iron oxyhydroxide composite adsorbent.

[0041] The SEM image of the activated carbon-lo...

Embodiment 3

[0045] A preparation method of activated carbon loaded iron oxyhydroxide composite adsorbent, comprising the following steps:

[0046] (1) Ultrasonicate 30g of activated carbon in 1L of 60wt% acetic acid solution (power 200W, frequency 100KHz, time 30min), seal, magnetically stir for 24h, change the water to boil, wash, change the water to boil, repeat this until the filtrate after the activated carbon is washed Clear and transparent, dry, and calcined at a high temperature of 500°C for 24h to obtain pretreated activated carbon; each time of boiling in the boiling is 15min; the drying temperature is 80°C;

[0047] (2) Mix 3g of pretreated activated carbon with 50mL of 0.02mol / L FeCl 3 The solution was stirred for 15 minutes, sealed, soaked and reacted at 150° C. for 20 hours, washed, and dried to constant weight (the drying temperature was 70° C.) to obtain an activated carbon-loaded iron oxyhydroxide composite adsorbent.

[0048] The loading rate of iron oxyhydroxide in this...

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Abstract

The invention belongs to the technical field of water body purification, and discloses an activated carbon supporting ferric oxyhydroxide composite adsorbent, and preparation and application thereof.A preparation method includes the steps of: 1) acidifying the activated carbon, changing water to boil the activated carbon, washing the activated carbon, and changing water to boil the activated carbon, repeating the operations hereinabove until a filtrate is clear and transparent after the activated carbon is washed, and drying the activated carbon and calcining the activated carbon at high temperature to prepare pretreated activated carbon; 2) uniformly dispersing the pretreated activated carbon in a FeCl3 solution, sealing the mixture, performing an infiltration reaction, and washing and drying the product to prepare the activated carbon supporting ferric oxyhydroxide composite adsorbent. The method is simple and low-cost. In the composite adsorbent, the ferric oxyhydroxide is in a spindle-like shape and is uniformly supported on the activated carbon. The composite adsorbent is stable and can remove bromates in water high-effectively, is easy to recycle, and is used for removing the bromates in drinking water.

Description

technical field [0001] The invention belongs to the technical field of water body purification treatment, and in particular relates to an activated carbon-loaded iron oxyhydroxide composite adsorbent, a preparation method and application thereof, and the composite adsorbent is used for removing bromate in water. The iron oxyhydroxide is β-FeOOH. Background technique [0002] Bromate is highly toxic to the human body and is defined as a Class 2B potential carcinogen by the International Agency for Research on Cancer (IRAC). In 2004, the World Health Organization (WorldHealth Organization, WHO) lowered the allowable concentration of bromate in the "Drinking Water Quality Standard" from 25 μg / L to 10 μg / L; ) also stipulates that the limit of bromate is 10μg / L. [0003] Ozone-biological activated carbon treatment technology has obvious effects on improving the quality of drinking water. However, when there is a certain concentration of bromide ions in the raw water, bromate, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/70C02F101/12
CPCB01J20/06B01J20/20C02F1/281C02F1/283C02F1/288C02F1/70C02F2101/12
Inventor 赵振刚韩德侠刘瑞海
Owner SOUTH CHINA UNIV OF TECH
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