Method for preparing methyl mercury removal agent

A technology of removing agent and methylmercury, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., and can solve the problems of small adsorption capacity, low reduction efficiency, complex preparation process of catalysts and adsorbents, etc. problem, achieve the effect of low preparation cost and simple preparation process

Active Publication Date: 2019-08-23
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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  • Method for preparing methyl mercury removal agent
  • Method for preparing methyl mercury removal agent
  • Method for preparing methyl mercury removal agent

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 method for preparing a methyl mercury removal agent. The method comprises the following steps: (1) respectively weighing tuff powder, aluminum powder, sodium hydroxide and sodium dodecyl sulfate, uniformly mixing to obtain inorganic carrier mixed powder, adding the inorganic carrier mixed powder into water, uniformly stirring, putting in a mold, curing and demolding to obtain an inorganic carrier test block, and crushing, grinding and screening the inorganic carrier test block to obtain inorganic carrier powder; (2) weighing iminodiacetic acid and sodium thioglycollate to be dissolved into water so as to obtain enhanced modification liquid; and (3) adding the inorganic carrier powder into the enhanced modification liquid, uniformly stirring, standing, air-drying and grinding, thereby obtaining the methyl mercury removal agent. According to the method disclosed by the invention, the preparation process is simple, the preparation cost is low, methyl mercury canbe fully adsorbed by the removal agent, and the problem in the prior art that the methyl mercury dissociates from the surface of the removal agent is solved.

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 Applications(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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