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Preparation of potassium permanganate modified heavy metal cadmium adsorbent

A potassium permanganate, adsorbent technology, applied in the direction of adsorption water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc. problems, to achieve the effect of low cost, abundant sources, and improved adsorption performance

Inactive Publication Date: 2019-12-27
天津大学(青岛)海洋工程研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, cadmium pollution in the water environment is relatively serious, and it is more harmful to the human body.
Experiments have proved that the biochar prepared from Enteromorpha as raw material has a certain ability to remove heavy metals, but the removal effect needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation of a heavy metal cadmium adsorbent modified by potassium permanganate, the concrete experimental steps are as follows:

[0016] 1. Weigh 15 g of Enteromorpha sample obtained after freeze-drying and place it in a polyethylene bottle with a volume of 500 mL, then add 75 mL of 0.1 mol / L KMnO 4 Put the aqueous solution in the bottle, stir the above mixture evenly, cover and seal it, and let it stand at room temperature for 12 h;

[0017] 2. Take out the mixture and place it in an oven at a temperature of 105°C for 24 hours, take out the dried sample, grind it with a mortar, and place it in a tube furnace;

[0018] 3. Infuse 50 mL / min of nitrogen gas for 5 min to remove the remaining air in the tube furnace, and then in 50 mL / min of N 2 Under the atmosphere, the temperature was raised from room temperature to 600 °C at a heating rate of 10 °C / min, and kept at this temperature for 1 h, and then cooled down to room temperature naturally;

[0019] 4. Dilute th...

Embodiment 2

[0022] The adsorbent material prepared by embodiment 1 is applied to the treatment of heavy metal cadmium wastewater, comprising the following steps:

[0023] Weigh 20 mg of the above-mentioned modified biochar adsorbent and put it into a 50 mL centrifuge tube, then add 25 mL of 20 mg / L Cd 2+ solution, respectively, with 0.1 mol / L HNO 3 Or 0.1 mol / L NaOH to adjust the pH of the solution so that Cd 2+ The initial pH of the solution was 7.0±0.2. Seal the centrifuge tube containing the mixture and place it in a shaker with a temperature of 25±1°C at 200 rpm to shake for 0.5 h, 1.5 h, 3 h, 6 h, 12 h, 18 h, and 24 h, then take samples. The centrifuge tubes containing the mixtures of different shaking times were placed in a centrifuge, centrifuged at 4000 rpm for 20 min, the supernatant was sucked out with a disposable dropper, and then the supernatant was filtered again with a 0.22 μm filter membrane. Determination of Cd in filtrate by atomic absorption spectrometry 2+ concentr...

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PUM

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Abstract

The invention provides preparation of a potassium permanganate modified heavy metal cadmium adsorbent, wherein marine pollutant enteromorpha is used as a raw material; the raw material source is rich,the cost is low, the marine pollutant enteromorpha can be turned into wealth, and the potassium permanganate modified heavy metal cadmium adsorbent has important significance in marine pollution treatment and removal of heavy metals in water; meanwhile, the potassium permanganate modified enteromorpha charcoal adsorbent has the advantages of large specific surface area and high adsorption efficiency, the heavy metal cadmium adsorption efficiency of the potassium permanganate modified enteromorpha charcoal adsorbent is improved by 20 times or above compared with that of non-modified enteromorpha charcoal; therefore, the invention provides a new adsorbent material is provided for adsorbing heavy metal cadmium.

Description

technical field [0001] The invention relates to the preparation of a modified biochar heavy metal adsorbent material, in particular to the preparation and application of an adsorbent material for removing heavy metal cadmium by modifying Enteromorpha biochar with potassium permanganate. Background technique [0002] As a new type of environmental functional material, biochar has attracted widespread attention. It has great application potential in greenhouse gas emission reduction, agricultural soil improvement, crop production increase, and water pollution remediation, and has become a research hotspot in recent years. Biochar has a highly aromatized structure, and its surface contains carboxyl, phenolic hydroxyl, carbonyl, acid anhydride and other groups. These structural characteristics make biochar have good adsorption characteristics and stability, and can be used as a good adsorption material. As a raw material for biochar production, Enteromorpha has a wide range of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/04B01J20/20B01J2220/4843C02F1/281C02F1/288C02F2101/20
Inventor 李湘萍陈冠益王传斌刘彬刘菊平
Owner 天津大学(青岛)海洋工程研究院有限公司
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