A composite flocculant with heavy metal ion adsorption and detection functions and preparation method thereof

A composite flocculant and heavy metal ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as inability to detect heavy metal ions, single heavy metal ion adsorption function, etc., to achieve Excellent removal effect, outstanding fluorescence quenching, cost reduction effect

Active Publication Date: 2019-04-26
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.
In addition, attapulgite is used as a heavy metal ion adsorption material, which only has a single heavy metal ion adsorption function, and cannot detect heavy metal ions at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (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.

[0023] 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

[0028] (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.

[0029] 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

[0034] (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.

[0035] 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 discloses a composite flocculating agent with a heavy metal ion adsorption and detection function and a preparation method of the composite flocculating agent, which belong to the field of macromolecule materials. A product of the composite flocculating agent is characterized in that not only can organic pollutants in water be effectively removed, but also heavy metal ions such as nickel, chromium, lead and the like in the water can be adsorbed and detected, the qualitative detection effect for the heavy metal ions in the water is good, the heavy metal ion adsorption capacity is high, and the adsorption efficiency is high. The adsorption removal rate for the low-concentration heavy metal ions in the waste water reaches 90 percent or higher. The product is prepared without needing a special device, the industrialized implementation is easy, the composite flocculating agent reduces the consumption of chitosan, and the cost is decreased.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing a composite flocculant with good adsorption and detection functions for heavy metal ions such as nickel, chromium and lead. The composite flocculant can not only effectively remove organic pollutants in water, but also adsorb and detect heavy metal ions such as nickel, chromium, lead, and mercury in water, and has a large adsorption capacity and high adsorption efficiency for heavy metal ions in water, so it can be used in electroplating Wastewater treatment fields such as industrial and chemical industries. Background technique [0002] In recent years, the random discharge of industrial wastewater, urban garbage, and rural pesticide spraying have caused serious water pollution, especially the pollution of heavy metal ions in water. In order to control water pollution, humans have explored many physical and chemical methods. Flocculants are the most used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F1/56C02F1/28G01N21/64C02F101/20C02F101/30
CPCC02F1/28C02F1/281C02F1/283C02F1/286C02F1/5236C02F1/56C02F2101/20C02F2101/30G01N21/643G01N2021/6432
Inventor 赵义平张平曹小浩文梦娟孙丽
Owner TIANJIN JINLIN WATER TREATMENT SCI & TECH CO LTD
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