Method for preparing recyclable efficient heavy metal ion adsorbents

A technology of heavy metal ions and adsorbents, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of low adsorption efficiency and non-recyclable use of metal ion adsorbents, and achieve rich pores and surface rough effect

Inactive Publication Date: 2018-02-16
陈合华
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem mainly solved by the present invention is to provide a preparation method of metal ion adsorbent for the defects of low adsorption efficiency and non-recyclable use of metal ion adsorbent

Method used

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  • Method for preparing recyclable efficient heavy metal ion adsorbents

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example 1

[0029] Weigh 100% of the sodium silicate solution with a mass fraction of 40%, pour it into a three-neck flask with a stirrer, slowly adjust the pH to 6 with hydrochloric acid with a mass fraction of 10%, start the stirrer, and stir at a speed of 350r / min for 30min , microwave oscillating treatment for 3 minutes, set the microwave oscillating power to 700W to obtain nano-hydrosol, put the nano-hydrosol in an oven and heat up to 80°C, and dry for 3 hours to obtain nano-silica gel; weigh 200g of nano-silica gel and put it in 400mL mass fraction In a 40% aqueous solution of methanesulfonic acid, control the temperature at 50°C, stir for 20 minutes to obtain activated silica gel, mix activated silica gel with chloropropyltrimethoxysilane in a mass ratio of 2:1 to obtain a reaction material, and react 200g Put the material in 400mL of xylene and react for 40min to obtain chloropropylated silica gel; take 40g of coniferous leaves and grind them in a mortar for 30min, then use 100mL of ...

example 2

[0031] Weigh 110mL of sodium silicate solution with a mass fraction of 40%, pour it into a three-necked flask with a stirrer, slowly adjust the pH to 7 with hydrochloric acid with a mass fraction of 10%, start the stirrer, and stir at a speed of 370r / min for 35min , microwave oscillating treatment for 4 minutes, set the microwave oscillating power to 750W to obtain nano-hydrosol, put the nano-hydrosol in an oven and heat up to 83°C, and dry for 3 hours to obtain nano-silica gel; weigh 200-220g nano-silica gel and place it in 420mL In the aqueous solution of methanesulfonic acid with a mass fraction of 40%, the temperature is controlled at 53°C and stirred for 25 minutes to obtain activated silica gel. The activated silica gel and chloropropyltrimethoxysilane are mixed in a mass ratio of 2:1 to obtain the reaction material. 230g of the reaction material was placed in 410mL of xylene and reacted for 42min to obtain chloropropylated silica gel; 43g of coniferous leaves were placed...

example 3

[0033] Weigh 120mL of sodium silicate solution with a mass fraction of 40%, pour it into a three-neck flask with a stirrer, slowly adjust the pH to 7 with hydrochloric acid with a mass fraction of 10%, start the stirrer, and stir at 400r / min for 40min , microwave oscillation treatment for 5 minutes, set the microwave oscillation power to 800W to obtain nano-hydrosol, put the nano-hydrosol in an oven and heat up to 85°C, and dry for 4 hours to obtain nano-silica gel; weigh 220g of nano-silica gel and put it in 450mL mass fraction In a 40% aqueous solution of methanesulfonic acid, control the temperature at 55°C, stir for 30 minutes to obtain activated silica gel, mix activated silica gel with chloropropyltrimethoxysilane in a mass ratio of 2:1 to obtain a reaction material, and react 250g Put the material in 420mL of xylene and react for 45min to obtain chloropropylated silica gel; take 50g of coniferous leaves and grind them in a mortar for 45min, then use 150mL of distilled wa...

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a method for preparing recyclable efficient heavy metal ion adsorbents. The method has the advantages that mixed reaction is carried out on gamma-chloropropyl trimethoxysilane and activated silica gel which is obtained by means of mixing to obtain chloropropylation silica gel, the chloropropylation silica gel is soaked in polyethylenimine solution, accordingly, strong chelation effects can be realized for metal ions, and the metal ions can be tightly adsorbed on silica gel surfaces to form nanometer filter membranes; hydrogen ions can be ionized by carboxyl groups in oxidized nanometer celluloses, dissociated negative electric groups are hydrocarbon groups, the hydrocarbon groups can be adsorbed and bound with other heavy metal ions in solution, and accordingly the purpose of efficiently adsorbing the heavy metal ions can be achieved; the weakly acidic heavy metal ions are arranged in strongly alkaline environments, accordingly, the heavy metal ions can be desorbed and can be infiltrated from nanometer fibrous filter membranes, the heavy metal ions can be desorbed from the alkaline solution by the heavy metal ion adsorbents, and the purpose of recycling the recyclable efficient heavy metal ion adsorbents can be achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method for a recyclable high-efficiency heavy metal ion adsorbent. Background technique [0002] The total storage of water resources in my country is about 2.81 trillion m 3 , ranking sixth in the world, but per capita water resources are less than 2400m 3 , only accounts for 1 / 4 of the world's per capita water, and is one of the countries with the least per capita water resources in the world. At the same time, with the rapid economic growth of our country and the continuous improvement of urbanization level, the problem of water resources is becoming more and more serious. Industrial and agricultural wastewater, urban domestic sewage, and various mining wastewater contain a large amount of heavy metals, which seriously threaten organisms and human health. Although some heavy metals are indispensable elements for human health, if they are excessive, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/26B01J20/28C02F1/28C02F101/20
CPCB01J20/103B01J20/261B01J20/28007B01J20/28033C02F1/281C02F1/285C02F2101/20
Inventor 陈合华何俊欣张淑娴
Owner 陈合华
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