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A kind of preparation method of methylmercury remover

A remover, methylmercury technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of small adsorption capacity, low reduction efficiency, high preparation and application costs, and achieve The effect of simple preparation process and low preparation cost

Active Publication Date: 2021-10-29
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have problems such as low reduction efficiency, small adsorption capacity, and surface analysis of mercury ion adsorbents in the process of disposing of methylmercury.
At the same time, the preparation process of catalysts and adsorbents used to dispose of methylmercury is complex, the cost of preparation and application is high, and it is difficult to realize industrial production

Method used

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  • A kind of preparation method of methylmercury remover
  • A kind of preparation method of methylmercury remover
  • A kind of preparation method of methylmercury remover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Influence of the amount of aluminum powder on the adsorption performance of methylmercury remover

[0017] Preparation of methylmercury remover: as figure 1 As shown, in terms of parts by mass, weigh 100 parts of tuff powder, weigh 4.5 parts, 4.7 parts, 4.9 parts, 5 parts, 7.5 parts, 10 parts, 10.2 parts, 10.5 parts, 11 parts of aluminum powder respectively, and 2.5 parts of sodium and 2 parts of sodium dodecylsulfonate were mixed uniformly to obtain mixed powder of inorganic carrier. According to the solid-liquid ratio of 1:0.45 (g / mL), the inorganic carrier mixed powder was added into water, stirred evenly, molded, maintained for 28 days, and demolded to obtain the inorganic carrier test piece. The inorganic carrier test piece is pulverized, pulverized, and passed through a 400-mesh sieve to obtain inorganic carrier powder. Weigh iminodiacetic acid and sodium mercaptoacetate at a molar ratio of 0.3:1, add them into water until completely dissolved, and prepare a str...

Embodiment 2

[0028] Effect of the amount of sodium hydroxide on the adsorption performance of methylmercury remover

[0029] Preparation of methylmercury remover: in parts by mass, weigh 100 parts of tuff powder, 10 parts of aluminum powder, respectively weigh 2.0 parts, 2.2 parts, 2.4 parts, 2.5 parts, 5 parts, 7.5 parts, 7.7 parts, 8.0 parts, 8.5 parts, and 4 parts of sodium dodecylsulfonate were mixed uniformly to obtain inorganic carrier mixed powder. According to the solid-liquid ratio of 1:0.6 (g / mL), the inorganic carrier mixed powder was added into water, stirred evenly, molded, maintained for 28 days, and demolded to obtain the inorganic carrier test piece. The inorganic carrier test piece is pulverized, pulverized, and passed through a 400-mesh sieve to obtain inorganic carrier powder. Weigh iminodiacetic acid and sodium mercaptoacetate at a molar ratio of 0.4:1, add to water until completely dissolved, and prepare a strengthening modification solution with a concentration of 1 ...

Embodiment 3

[0035] Effect of molar ratio of iminodiacetic acid and sodium mercaptoacetate on the adsorption performance of methylmercury remover

[0036] Preparation of methylmercury remover: in parts by mass, weigh 100 parts of tuff powder, 10 parts of aluminum powder, 7.5 parts of sodium hydroxide, and 6 parts of sodium dodecylsulfonate, and mix them uniformly to obtain inorganic carrier mixed powder . According to the solid-liquid ratio of 1:0.75 (g / mL), the inorganic carrier mixed powder was added into water, stirred evenly, molded, maintained for 28 days, and demolded to obtain the inorganic carrier test piece. The inorganic carrier test piece is pulverized, pulverized, and passed through a 200-mesh sieve to obtain inorganic carrier powder. Weigh iminodiacetic acid and mercaptoacetic acid at molar ratios of 0.25:1, 0.27:1, 0.29:1, 0.3:1, 0.4:1, 0.5:1, 0.52:1, 0.55:1, and 0.6:1 Add sodium into water until it is completely dissolved, and prepare a strengthening modification solution ...

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Abstract

The invention discloses a preparation method of a methylmercury remover, which comprises the following steps: (1) respectively weighing tuff powder, aluminum powder, sodium hydroxide and sodium dodecylsulfonate and mixing to obtain an inorganic carrier mixed powder, Add the inorganic carrier mixed powder into water, stir evenly, put into the mold, maintain and demould to obtain the inorganic carrier test piece, then pulverize, grind and sieve the inorganic carrier test piece to obtain the inorganic carrier powder; (2) Weigh the imine Diacetic acid and sodium thioglycolate are dissolved in water to obtain a strengthened modification solution; (3) adding inorganic carrier powder to the strengthened modification solution, stirring evenly, standing still, air-drying, and grinding to obtain a methylmercury remover. The preparation process of the present invention is simple, and the preparation cost is low, and the remover can fully adsorb methylmercury, and solves the problem that methylmercury will be decomposed from the surface of the remover in the prior art.

Description

technical field [0001] The invention relates to a preparation method of an alkylmercury remover in waste water, in particular to a preparation method of a methylmercury remover. Background technique [0002] Methylmercury is thousands of times more toxic than elemental mercury. It is highly toxic, and it is lipophilic and can penetrate cell membranes, causing great harm to human health. The arbitrary discharge of mercury-containing wastewater and the methylation of inorganic mercury in the aquatic ecological environment are the main causes of methylmercury pollution. At present, the commonly used methods for the disposal of mercury-containing wastewater include reduction method, chemical precipitation method, ion exchange method, electrochemical migration, adsorption method and solvent extraction method. However, these methods have problems such as complicated disposal links, high treatment costs, and secondary pollution. For the removal of methylmercury in waste liquid, p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/02B01J20/041B01J20/165B01J20/22B01J20/2808C02F1/288C02F2101/30
Inventor 黄涛宋东平刘龙飞周璐璐陶骏骏徐娇娇
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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