Preparation method of magnetic adsorptive material and application thereof

A technology of magnetic adsorption materials and dosage, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of high cost and poor effect, achieve good effect, simple preparation process, and low price Effect

Inactive Publication Date: 2017-12-15
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem to be solved: This application mainly proposes a preparation method and application of

Method used

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  • Preparation method of magnetic adsorptive material and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] like figure 1 Shown, a kind of preparation method of magnetic adsorption material comprises the steps:

[0023] In the first step, Ag-CoFe was prepared by hydrothermal synthesis 2 o 4 -Precursor of GAC complex: weigh 0.1450g of Co(NO 3 ) 2 ▪6H 2 O, 0.4052g of Fe (NO 3 ) 2 ▪9H 2 O, 0.1260g of AgNO 3 and 0.12g of granular activated carbon GAC, the granular activated carbon GAC was washed with 1mol / L hydrochloric acid and 1mol / L sodium hydroxide to obtain the pretreated GAC, and then the pretreated GAC and Co(NO 3 ) 2 ▪6H 2 O, Fe (NO 3 ) 2 ▪9H 2 O and AgNO 3 Mix and add 80 mL of deionized water to dissolve, stir, and stir the obtained mixture into a reactor for hydrothermal reaction. The hydrothermal reaction temperature is 215° C., and the hydrothermal reaction time is 19 hours.

[0024] The second step, calcination to prepare Ag-CoFe 2 o 4 -GAC complex: the black product obtained after the hydrothermal reaction is filtered through a filter paper with a f...

Embodiment 2

[0027] like figure 1Shown, a kind of preparation method of magnetic adsorption material comprises the steps:

[0028] In the first step, Ag-CoFe was prepared by hydrothermal synthesis 2 o 4 -Precursor of GAC complex: weigh 0.1450g of Co(NO 3 ) 2 ▪6H 2 O, 0.4052g of Fe (NO 3 ) 2 ▪9H 2 O, 0.1260g of AgNO 3 and 0.12g of granular activated carbon GAC, the granular activated carbon GAC was washed with 1mol / L hydrochloric acid and 1mol / L sodium hydroxide to obtain the pretreated GAC, and then the pretreated GAC and Co(NO 3 ) 2 ▪6H 2 O, Fe (NO 3 ) 2 ▪9H 2 O and AgNO 3 Mix and add 80 mL of deionized water to dissolve, stir, and put the obtained mixture into a reactor for hydrothermal reaction after stirring evenly. The hydrothermal reaction temperature is 200° C., and the hydrothermal reaction time is 18 hours.

[0029] The second step, calcination to prepare Ag-CoFe 2 o 4 -GAC complex: the black product obtained after the hydrothermal reaction is filtered through a f...

Embodiment 3

[0032] like figure 1 Shown, a kind of preparation method of magnetic adsorption material comprises the steps:

[0033] In the first step, Ag-CoFe was prepared by hydrothermal synthesis 2 o 4 -Precursor of GAC complex: weigh 0.1450g of Co(NO 3 ) 2 ▪6H 2 O, 0.4052g of Fe (NO 3 ) 2 ▪9H 2 O, 0.1260g of AgNO 3 and 0.12g of granular activated carbon GAC, the granular activated carbon GAC was washed with 1mol / L hydrochloric acid and 1mol / L sodium hydroxide to obtain the pretreated GAC, and then the pretreated GAC and Co(NO 3 ) 2 ▪6H 2 O, Fe (NO 3 ) 2 ▪9H 2 O and AgNO 3 Mix and add 80 mL of deionized water to dissolve, stir, and put the obtained mixture into a reactor for hydrothermal reaction after stirring evenly. The hydrothermal reaction temperature is 230° C., and the hydrothermal reaction time is 20 h.

[0034] The second step, calcination to prepare Ag-CoFe 2 o 4 -GAC complex: the black product obtained after the hydrothermal reaction is filtered through a filt...

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Abstract

The invention discloses a preparation method of a magnetic adsorptive material and application thereof. The preparation method comprises the following steps: performing acid pickling and alkaline wash on granular active carbon GAC so as to obtain the pretreated GAC; mixing with Co(NO3)2.6H2O, Fe(NO3)2.9H2O and AgNO3, adding deionized water to be dissolved and stirred, carrying out hydrothermal reaction on the obtained mixture in a reaction kettle, filtering the reacted product, washing with deionized water and ethanol until any color does not exist, performing drying and high-temperature calcining on the obtained colorless product, and finally obtaining granular active carbon Ag-CoFe2O4-GAC loaded with silver cobalt ferric oxides. The modified GAC has improved adsorptive property and also has magnetic property, heavy metals are removed from a water body by virtue of adsorption and magnetic separation when wastewater containing heavy metals is treated, the modified GAC serves as a novel magnetic adsorptive material, and the effect of treating the heavy metals in the wastewater is obviously improved.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a preparation method and application of a magnetic adsorption material. Background technique [0002] Heavy metal ion wastewater mainly comes from industrial wastewater, which is extremely polluting to the environment and most harmful to the human body. These industrial wastewaters mainly come from the drainage of mines and non-ferrous metal smelters. Lead-containing wastewater mainly comes from organic synthesis, pesticides, fuel, chemical processing and other industries. Heavy metal ion wastewater is difficult to be biodegraded and easily adsorbed on the surface or body of organisms in the water. This hazard will last for a long time , and even some heavy metal ions will be transformed into more toxic metal-organic compounds under the action of microorganisms, among which lead will cause serious harm to the liver, kidney and spleen of the human body. As an ads...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/48C02F101/20
Inventor 吴云海陶小明张冰
Owner HOHAI UNIV
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