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Gelatin composite adsorbent based technology for high efficiently removing heavy metals in water

A composite adsorption and heavy metal technology, which is applied in the direction of adsorption of water/sewage treatment, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of lack of production cost and low mechanical strength adsorbents, and achieve excellent mechanical strength, Improvement in processing efficiency and ease of preparation process

Active Publication Date: 2017-07-14
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is a lack of an adsorbent with low production cost, high mechanical strength and good effect on various impurities

Method used

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  • Gelatin composite adsorbent based technology for high efficiently removing heavy metals in water
  • Gelatin composite adsorbent based technology for high efficiently removing heavy metals in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A kind of efficient heavy metal wastewater treatment method based on gelatin composite adsorbent, comprises the steps:

[0065] 1. Mix edible gelatin, polyvinyl alcohol, and sodium carboxymethyl cellulose at a mass ratio of 20:3:1, then mix the mixed powder with distilled water at a mass ratio of 1:10, stir to 80°C while heating, and then continue Stir and incubate at 80°C for 1h. Then put the imbibed powder into an ice-water bath and continue to stir. During the stirring process, add 1% glutaraldehyde solution dropwise (100mL solution is added dropwise with 5mL glutaraldehyde), continue to stir for 30min, and put it in an oven after standing for separation. drying.

[0066] 2. Desulfurization wastewater from Huaneng Jiaxiang Power Plant. The desulfurization wastewater is introduced into the sedimentation tank, and the adsorbent is added. The mass ratio of the adsorbent to the wastewater is 1:2000, the water flow rate is 0.8m / s, and the stirring is continued for 0.5h....

Embodiment 2

[0085] A kind of efficient heavy metal wastewater treatment method based on gelatin composite adsorbent, comprises the steps:

[0086] 1. The preparation steps of adsorbent are the same as in Example 1.

[0087] 2. Taken from the desulfurization wastewater of Huadian Zouxian Power Plant.

[0088] 3. Adsorption separation process is the same as in Example 1.

[0089] 4. The water quality analysis process is the same as in Example 1, and the water quality analysis data are shown in Table 3.

[0090] table 3

[0091] metal type Before treatment (ppm) After treatment (ppm) Removal rate copper 0.229 0.007 96.9％ chromium not detected not detected - cadmium 0.331 0.011 96.7％ nickel 0.089 0.008 91.0％ zinc 0.154 0.023 85.1％ lead not detected not detected - arsenic 0.138 0.004 97.1％

Embodiment 3

[0093] A kind of efficient heavy metal wastewater treatment method based on gelatin composite adsorbent, comprises the steps:

[0094] 1. The preparation steps of adsorbent are the same as in Example 1.

[0095] 2. Taken from the desulfurization wastewater of Huaneng Huangtai Power Plant.

[0096] 3. Adsorption separation process is the same as in Example 1.

[0097] 4. The water quality analysis process is the same as in Example 1, and the water quality analysis data are shown in Table 4.

[0098] Table 4

[0099] metal type Before treatment (ppm) After treatment (ppm) Removal rate copper 0.204 0.013 93.6％ chromium 0.044 0.007 84.1％ cadmium 0.085 not detected 100％ nickel 0.177 0.004 97.7％ zinc 0.335 0.011 96.7％ lead 0.063 not detected 100％ arsenic not detected not detected -

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Abstract

The invention discloses a gelatin composite adsorbent based technology for high efficiently removing heavy metals in water. A gelatin composite is taken as the adsorbent. The desulfurization wastewater in multiple power plants can be processed efficiently without adding separation equipment. The heavy metal ions in desulfurization wastewater can be removed high efficiently. The adsorbent is simple to prepare, the raw materials are cheap and easily available, at the same time, the separation is simple, and heavy metals in wastewater can be easily separated. The technology has the advantages that various heavy metals can be fully separated, at the same time, the separation process becomes easy, and the heavy metal separation efficiency is improved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a high-efficiency removal process for heavy metals in water bodies based on a gelatin composite adsorbent. Background technique [0002] With the continuous development of industry and various manufacturing industries, more and more water bodies are polluted by heavy metals, and various medical and biological studies have shown that the content of heavy metals in water will not only affect the survival of animals and plants in water bodies, but also through biological chains into human food, and ultimately affect human health and survival. Therefore, strict heavy metal restrictions are currently required for the discharge of wastewater to ensure the safety of wastewater discharge. [0003] Usually, the removal process of heavy metals in water body includes precipitation method and adsorption method. The precipitation method usually achieves the removal of heavy metals...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20C02F101/22
CPCB01J20/24B01J20/261B01J20/28047C02F1/285C02F1/286C02F2101/20C02F2101/22
Inventor 刘国强吴中杰许立国张燕侯亚琴高坚李贵海
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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