Heavy metal chelating agent and preparation method thereof

A technology of heavy metal scavenger and surfactant, applied in the direction of non-metallic elements, chemical instruments and methods, and other chemical processes, can solve problems such as chemical instability, achieve strong operability, simple method, and strong capture capacity Effect

Active Publication Date: 2010-06-30
恩达电路(深圳)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because all xanthated products have the problem of chemical instability, t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Weigh 10 g of acid-activated montmorillonite, wash with 500 mL of deionized water, and centrifuge for 4 times. The pH of the wash water (that is, the cleaned deionized water) is 6.7. Then add 90 mL of deionized water and stir to prepare a slurry of montmorillonite suspension with a concentration of 10%.

[0031] 2. Weigh 1g of dodecyltrimethylammonium bromide and dissolve it in 100mL of deionized water to form a surfactant solution with a concentration of 1% by mass, and slowly pour into the above montmorillonite while stirring The suspension slurry was activated for 12 hours, during which stirring was continued, and then centrifuged for dehydration. After washing with deionized water for 4 times, add 190 mL of deionized water and stir to prepare activated montmorillonite suspension slurry with a concentration of 5%.

[0032] 3. Measure 5 mL of diethylenetriamine, slowly pour the above-mentioned activated montmorillonite suspension slurry while stirring, carry out the in...

Embodiment 2

[0036] 1. Weigh 10 g of acid-activated montmorillonite, wash with 500 mL of deionized water, and centrifuge for 5 times. The pH of the washing water (ie, cleaned deionized water) is 6.8. Then add 90 mL of deionized water and stir to prepare a montmorillonite suspension slurry with a concentration of 10%.

[0037] 2. Weigh 2g of dodecyltrimethylammonium bromide and dissolve it in 100mL of deionized water to form a surfactant solution with a concentration of 1% by mass, and slowly pour into the above montmorillonite while stirring The slurry was subjected to an activation reaction for 12 hours, during which stirring was continued, and then centrifuged for dehydration. After washing with deionized water for 4 times, add 190 mL of deionized water and stir to prepare activated montmorillonite suspension slurry with a concentration of 5%.

[0038] 3. Measure 5 mL of triethylenetetramine, slowly pour the above-mentioned activated montmorillonite suspension slurry while stirring, carry ou...

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PUM

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Abstract

The invention discloses a heavy metal chelating agent and a preparation method thereof, relating to heavy metal treatment in sewage. The heavy metal chelating agent is dithiocarbamic acid intercalated montmorillonite. In the preparation method, montmorillonite is modified by dithiocarbamic acid to obtain the dithiocarbamic acid intercalated montmorillonite. The invention has the advantages of simple method, strong maneuverability, cheap price and easy-obtaining; and the prepared heavy metal chelating agent has stable property and high heavy metal ion trapping capacity, and can generate big and heavy alumen ustum which has high sedimentation rate.

Description

Technical field [0001] The invention relates to the treatment of heavy metals in sewage, in particular to a heavy metal capture agent and a preparation method thereof. Background technique [0002] With the development of industry, environmental pollution has become more and more serious, and the amount of sewage containing heavy metal ions has also increased. Sewage containing heavy metal ions mainly comes from mechanical processing, mining, metal smelting, electronics industry and some chemical industries. Although some heavy metals are essential trace elements for human health, when excessive heavy metals are ingested, heavy metals will accumulate in the body, causing acute or chronic poisoning. In recent years, people have attached great importance to the research of heavy metal wastewater treatment, and many methods have been developed for the treatment of heavy metal wastewater. The more typical methods are chemical precipitation, electrolysis, ion exchange, membrane trea...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30C01B33/44C02F1/28C02F1/62
Inventor 张维睿陈荣贤
Owner 恩达电路(深圳)有限公司
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