Preparation method and product of heavy metal ion absorption type composite flocculant

A technology of composite flocculants and heavy metal ions, applied in chemical instruments and methods, adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., to achieve the effect of reduced dosage, low production cost and good adsorption

Inactive Publication Date: 2017-05-31
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

[0006] However, how to apply attapulgite to sewage treatment, which can not only effectively remove organic pollutants in water, but also efficiently adsorb heavy metal ions in water is still a big problem.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (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.

[0020] 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

[0024] (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.

[0025] 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

[0029] (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.

[0030] 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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Abstract

The invention relates to a preparation method and product of a chitosan composite flocculant with the advantages that organic contaminants in water can be effectively removed; heavy metal ions such as nickel, chromium and lead in water can be adsorbed; the adsorption quantity on heavy metal ions is great; the adsorption efficiency is high. The product is prepared by using chitosan as raw materials, using glutaraldehyde as a cross-linking agent and using attapulgite subjected to water washing and acid washing treatment and tannin modification as a modifying agent. The adsorption removal rate of the composite flocculant product on the heavy metal ions such as low-concentration nickel, chromium, lead and mercury reaches 90 percent or higher. The preparation method of the composite flocculant for adsorbing heavy metal ions has the characteristics that the process is simple; the cost is low; special equipment is not needed; the industrial implementation is easy, and the like. The consumption of chitosan by the composite flocculant is reduced; the 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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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/28C02F101/20
CPCC02F1/5236C02F1/28C02F1/281C02F1/286C02F1/56C02F2101/20
Inventor 赵义平张平曹小浩姜文哲赵国部
Owner TIANJIN JINLIN WATER TREATMENT SCI & TECH CO LTD
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