Preparation method of broad-spectrum heavy metal trapping agent

A heavy metal collector and broad-spectrum technology, which is applied in the field of removal of heavy metal ions in heavy metal wastewater, can solve the problems of poor flocculation and complex production process, and achieve dense flocs, simple synthesis process, and easy large-scale production Effect

Active Publication Date: 2012-05-02
浙江至美环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the deficiencies in the above-mentioned prior art, the present invention provides a broad-spectrum heavy metal collector with strong flocculation ability and simple preparation and operation and its preparation method. The heavy metal coll

Method used

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  • Preparation method of broad-spectrum heavy metal trapping agent
  • Preparation method of broad-spectrum heavy metal trapping agent
  • Preparation method of broad-spectrum heavy metal trapping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve 8.6g of anhydrous piperazine in 90g of water, add 8g of solid sodium hydroxide after it is completely dissolved, pour it into a four-neck round bottom flask after it dissolves and cool, and put 15.2g of carbon disulfide from the dropping funnel below 25°C Add drop by drop, and the dropping process lasts for about half an hour. After the dropwise addition, continue to react at room temperature for 2 hours to obtain a light yellow transparent solution, which is a broad-spectrum heavy metal collector.

[0021] Take a small amount of product for infrared characterization, as attached figure 1 As shown, the broad absorption band at 3282.82~3444.90cm-1 is the N-H stretching vibration peak, and the strong absorption peaks at 1461.78 and 1419.31cm-1 are the characteristic stretching vibration absorption peaks of N-C=S. The strong absorption peak at 1209.88cm-1 is the absorption peak of the characteristic stretching vibration of C=S, and the strong absorption peak at 10...

Embodiment 2

[0026] Dissolve 12.9g of anhydrous piperazine in 87g of water, add 8g of solid sodium hydroxide after it is completely dissolved, pour it into a four-neck round bottom flask after it dissolves and cool, and put 22.8g of carbon disulfide from the dropping funnel below 25°C Add drop by drop, and the dropping process lasts for about half an hour. After the dropwise addition, continue to react at room temperature for 2 hours to obtain a broad-spectrum heavy metal scavenger.

[0027] Prepare copper pyrophosphate and nickel citrate two common simulated complex heavy metal wastewater respectively. The initial concentration of copper and nickel in the sample is about 5mg / L, and the pH values ​​of the sample are 3.18 and 3.81 respectively. pH value, without adding any flocculant, add the above-mentioned heavy metal trapping agent, stir on a magnetic stirrer for 15 minutes, and then filter with a 0.22um microporous membrane to measure the concentration of heavy metal ions remaining in th...

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Abstract

The invention discloses a broad-spectrum heavy metal trapping agent of which the main active ingredient is sodium piperazinyl dithiocarbamate; the invention also discloses a preparation method of the broad-spectrum heavy metal trapping agent. The preparation method comprises the following steps of: reacting anhydro-piperazine, sodium hydroxide and carbon disulfide according to proportion, and keeping constant temperature for 2-2.5 hours to get the light yellow liquid heavy metal trapping agent. The preparation method is simple and safe, the heavy metal trapping agent prepared by the method has better trapping effects on both common free-state and complex-state metals without adding any flocculating agent and regulating the pH value of the waste water. The heavy metal trapping agent belongs to broad-spectrum heavy metal trapping agents, and in comparison with other similar medicines, the broad-spectrum heavy metal trapping agent has the advantages of mild condition, simple production technology, low production cost, strong complexing capability and the like.

Description

technical field [0001] The invention relates to a broad-spectrum heavy metal trapping agent and a preparation method, which are specifically applied in the fields of removal, trapping and purification of heavy metal ions in heavy metal wastewater. Background technique [0002] In recent years, with the rapid development of modern industries such as electronics, electroplating, mining, smelting, leather, and chemical industry, the discharge of heavy metal wastewater has increased year by year, and the composition of wastewater has become more complex, making the treatment of heavy metal wastewater more difficult. On the other hand, the country's requirements for the discharge of heavy metal wastewater are becoming more and more stringent. In February 2011, the State Council officially approved the "Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollution" as my country's first special plan for the "Twelfth Five-Year Plan". The total amount contr...

Claims

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Application Information

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IPC IPC(8): C02F1/54C02F101/20
Inventor 杨岳平高冲赖水秀
Owner 浙江至美环境科技有限公司
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