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Preparation method of mineralized refuse loaded magnetic catalyst for water treatment

A magnetic catalyst, a technology for mineralizing garbage, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Achieving the effect of low price, improved water treatment capacity and high porosity

Active Publication Date: 2012-12-05
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is easy to agglomerate at the nanoscale, which affects the effect. If a small amount of nanoparticles is not separated under the condition of magnetic separation, it will flow into the environment and cause the impact of nanoparticles on the environment and ecology.

Method used

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  • Preparation method of mineralized refuse loaded magnetic catalyst for water treatment

Examples

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Effect test

Embodiment 1

[0019] Ferric salt Fe(NO 3 ) 3 and ferrous salt FeCl 2 mixed, where Fe 3+ : Fe 2+ =2:1 (molar ratio) added to water, then add a certain amount of CuSO 4 , Cu 2+ : Fe 2+ =1:1 (molar ratio), formulated as Fe 3+ , Fe 2+ 、Cu 2+ For a mixed solution with a total concentration of 4mol / L, add the mineralized garbage that has been dried and crushed through a 150-mesh sieve into the solution. The solid-to-liquid mass ratio of the mineralized garbage to the solution is 1:5 to make a suspension, and stir for 2 hours. Place in a constant temperature water bath at 80°C, add 1mol / L KOH solution dropwise under stirring, the dosage is 1 / 3 of the volume of the mixed solution, continue stirring for 3 hours after the addition is complete; after the stirring stops, wash the precipitate with distilled water for 3 times , baked at 105°C for 3 hours, dried, and ground to obtain magnetic mineralized garbage. The iron content was 22.1% and the copper content was 8.9% according to ICP analysis...

Embodiment 2

[0023] FeCl 3 and ferrous salt FeSO 4 mixed, where Fe 3+ : Fe 2+ =2:1.5 (molar ratio) added to water, then add a certain amount of CuSO 4 , Cu 2+ : Fe 2+ =1:1.5 (molar ratio), formulated as Fe 3+ , Fe 2+ 、Cu 2+ A mixed solution with a total concentration of 0.4mol / L, add dried and crushed mineralized garbage that has passed through a 60-mesh sieve into the solution, and the solid-liquid mass ratio of the mineralized garbage to the solution is 1:25 to make a suspension, and stir for 3 hours , placed in a constant temperature water bath at 70°C, add 1.5mol / L NaOH solution dropwise under stirring, the dosage is 1 / 2 of the volume of the mixed solution, continue stirring for 4 hours after the addition is complete; after the stirring stops, wash the precipitate with distilled water 5 times, baked at 120°C for 3 hours, dried and milled to obtain magnetic mineralized garbage. The iron content was 21.5% and the copper content was 8.3% according to ICP analysis. .

[0024] Add...

Embodiment 3

[0027] FeCl 3 and ferrous salt FeSO 4 mixed, where Fe 3+ : Fe 2+ =2:1 (molar ratio) added to water, then add a certain amount of CuSO 4 or CuCl 2 , Cu 2+ : Fe 2+ =1:1.5 (molar ratio), formulated as Fe 3+ , Fe 2+ 、Cu 2+ Mixed solution with a total concentration of 2mol / L, add the mineralized garbage that has been dried and crushed through a 100-mesh sieve into the solution, the solid-liquid mass ratio of the mineralized garbage to the solution is 1:20 to make a suspension, stir for 3 hours, Place in a constant temperature water bath at 80°C, add 1.5mol / L KOH solution dropwise under stirring, the dosage is 1 / 2 of the volume of the mixed solution, and continue stirring for 4 hours after the addition is completed; after the stirring stops, wash the precipitate with distilled water for 5 The second time, it was baked at 120°C for 4 hours, dried and ground to obtain magnetic mineralized garbage. The iron content was 20.7% and the copper content was 7.5% according to ICP ana...

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Abstract

The invention provides a preparation method of a mineralized refuse loaded magnetic catalyst for water treatment. The preparation method comprises the following steps: 1), mixing a trivalent ferric salt and a bivalent ferric salt; adding a mixture to water; adding a bivalent copper salt to the water so as to prepare a mixed solution with total concentration of Fe3+, Fe2+ and Cu2+ of 0.4-4 mol / L; adding dried and crushed mineralized refuses to the solution; preparing the mineralized refuses and the solution into a suspension according to a solid and liquid mass ratio of 1:5-1:25; stirring the suspension for 2-3 h; placing the suspension in a constant temperature water bath at 70-80 DEG C; dripping an alkali solution of 1-1.5 mol / L into the suspension during stirring, wherein the usage of the alkali solution is 1 / 3-1 / 2 of the volume of the mixed solution; and continuing to stir the suspension for 3-4 hours after the dripping is finished; and 2), after stopping the stirring, washing a precipitate by a distilled water for 3-5 times, drying the precipitate for 3-4 hours at 105-120 DEG C, and drying and grinding the precipitate so as to prepare magnetic mineralized refuses. Fenton reaction performance is enhanced and water treatment capacity is improved.

Description

technical field [0001] The invention relates to the field of new materials for environmental pollution control, in particular to a method for preparing water treatment materials from mineralized garbage. Background technique [0002] Fenton's reagent generally refers to Fe 2+ and H 2 o 2 The oxidation system constituted, invented by French scientist H.J.H.Fenton in 1894, is a chemical oxidation water treatment technology that does not require high temperature and high pressure and has simple equipment. Early Fenton reagents were mainly used in organic analytical chemistry and organic synthesis reactions. In 1964, Eisenhouser first used Fenton reaction as a wastewater treatment technology, and succeeded in phenol and alkylbenzene wastewater treatment experiments. The traditional Fenton reaction will cause the loss of iron ions. In order to solve this problem, the heterogeneous Fenton reaction has been gradually developed. This reaction system usually loads the iron ions wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/10C02F1/72
Inventor 马建锋邹静李定龙姚超
Owner HUAWEI TEHCHNOLOGIES CO LTD
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