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Preparation method of composite flocculant capable of adsorbing heavy metal ions and composite flocculant product through

A composite flocculant, a technology for absorbing heavy metals, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water pollutants, etc., to achieve the effects of reducing dosage, simple preparation method, and improving the scope of application and flocculation efficiency

Inactive Publication Date: 2013-09-04
TIANJIN JINLIN WATER TREATMENT SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to apply attapulgite to sewage treatment can not only effectively remove organic pollutants in water, but also absorb heavy metal ions in water is a big problem.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Pretreatment of attapulgite. Weigh 10g of attapulgite with a particle size of 300 mesh, wash with 1L of distilled water, take its supernatant after precipitation, centrifuge at 500rpm for 1min, take its supernatant, add a small amount of distilled water to the supernatant and mix evenly, and then continue to centrifuge at 500rpm for 1min. Then take its supernatant, wash the supernatant repeatedly like this for 3 times, and finally carry out centrifugation with 4000rpm, take its precipitate, vacuum dry at 90°C for 24 hours, and select a sieve with the corresponding mesh size according to the particle size after grinding to sieve. Purified attapulgite was obtained.

[0018] Prepare a hydrochloric acid solution with a concentration of 0.5mol / L, add 10g of purified attapulgite and 150mL of hydrochloric acid solution into a small beaker and stir and mix. After 5min, heat the mixture to 70°C, stir for 1h, then oscillate ultrasonically for 30min, and filter with suction. ...

Embodiment 2

[0021] (1) Pretreatment of attapulgite. Weigh 10g of attapulgite with a particle size of 1000 mesh, wash it with 1L of distilled water, and take its supernatant after sedimentation, centrifuge at 500rpm for 1min, take its supernatant, add a small amount of distilled water to the supernatant and mix evenly, continue to centrifuge at 500rpm for 1min, and then take The supernatant, after repeated washing of the supernatant for 3 times in this way, is finally centrifuged at 4000rpm, and the precipitate is collected, dried in vacuum at 90°C for 24 hours, ground and sieved with a sieve corresponding to the particle size to obtain purified Attapulgite.

[0022] Prepare a hydrochloric acid solution with a concentration of 0.5mol / L, take 20g of purified attapulgite and 150mL of hydrochloric acid solution into a small beaker and stir and mix. After 5min, heat the mixture to 70°C, stir for 1h, then oscillate ultrasonically for 30min, and filter with suction. Wash with distilled water un...

Embodiment 3

[0025] (1) Pretreatment of attapulgite. Weigh 20g of attapulgite with a particle size of 300 mesh, wash it with 1L of distilled water, settle and take its supernatant, centrifuge at 500rpm for 1min, take its supernatant, add a small amount of distilled water to the supernatant and mix evenly, continue to centrifuge at 500rpm for 1min, and then take The supernatant, after repeated washing of the supernatant 5 times in this way, was finally centrifuged at 4000rpm, and the precipitate was taken, dried in vacuum at 90°C for 24 hours, ground and sieved with a sieve corresponding to the particle size to obtain purified Attapulgite.

[0026] Prepare a hydrochloric acid solution with a concentration of 3mol / L, take 10g of purified attapulgite and 150mL of hydrochloric acid solution into a small beaker and stir and mix. After 5min, heat the mixture to 80°C, stir for 2h, then oscillate ultrasonically for 30min, and filter with suction. Wash with distilled water until the pH is about 6,...

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PUM

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Abstract

The invention relates to a preparation method of a chitosan compound flocculant which can effectively remove organic pollutants in water, can adsorb heavy metal ions such as nickel, chromium and lead in water and has high heavy metal ion adsorption capacity and high adsorption efficiency and a chitosan compound flocculant product thereof. The chitosan compound flocculant product is prepared by adopting chitosan as a raw material, glutaraldehyde as a crosslinking agent and washed and acid pickled attapulgite as a modifier. The preparation method of the compound flocculant capable of adsorbing heavy metal ions has the characteristics of simple technology, low cost, no special equipment and easy industrial implementation, the compound flocculant reduces dosage of chiston, and cost is reduced.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a composite flocculant with good adsorption function for nickel, chromium, lead and other heavy metal ions and a preparation method thereof. The flocculant can not only effectively remove organic pollutants in water, but also adsorb heavy metal ions such as nickel, chromium, and lead in water, and has a large adsorption capacity and high adsorption efficiency for heavy metal ions in water. It can be used in electroplating industry, chemical industry, etc. The field of sewage treatment. Background technique [0002] In recent years, with the geometric growth of population, the indiscriminate discharge of modern industrial waste water, urban garbage, pesticide spraying in rural areas, etc., the shortage of fresh water resources, which is already very small, has been exacerbated. In order to control water pollution, human beings have explored many physical and chemical methods, and...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F101/30C02F101/20
Inventor 赵义平赵国部张桂芳贾卓强吕超
Owner TIANJIN JINLIN WATER TREATMENT SCI & TECH CO LTD
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