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Application of monatomic catalyst as wastewater treatment flocculant

A technology of wastewater treatment and catalyst, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems that have not been reported in the field of environmental protection and achieve excellent flocculation effect Effect

Pending Publication Date: 2021-03-16
LINKWAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although single-atom catalysts have been studied as hot spots in the fields of energy, chemical engineering, and physics, and play their catalytic role with high activity and high selectivity, their research in the field of environmental protection has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1, adding an aqueous solution of 5g / L ferric chloride into diatomite (inorganic silicon-based carrier), wherein the mass ratio of transition metal to carrier is 1:20, and the resulting solution is dispersed evenly by ultrasonication for 30min under the condition of 100kHz, and then Stir the mixed solution at 100r / min for 12h;

[0022] Step 2, warming up the mixed solution obtained in step 1 to the boiling point of water, volatilizing at high temperature, evaporating the solvent, and fully grinding for 0.5 hours with a ball mill at a speed of 50 r / min to obtain a solid powder;

[0023] Step 3, the solid powder obtained in step 2 is heat-treated for 2 hours in a 3vt% (volume percent concentration) hydrogen-argon gas mixture atmosphere and a temperature of 400° C., cooled to room temperature, and ground by a ball mill for 20 minutes at a speed of 50 r / min, namely The desired single-atom catalyst is obtained, and the transition metal contained in the prepared catalyst ...

Embodiment 2

[0025] Step 1, the aqueous solution of 10g / L cupric chloride is added in the calcium carbonate (inorganic calcium-based carrier), wherein the mass ratio of transition metal and carrier is 1:50, ultrasonic 30min is dispersed evenly under the condition of the gained solution 100kHz, and then The mixed solution was stirred at 150r / min for 20h;

[0026] Step 2, heating the mixed solution obtained in step 1 to the boiling point of water, volatilizing at high temperature, evaporating the solvent to dryness, and fully grinding for 1 hour with a ball mill at a speed of 100 r / min to obtain a solid powder;

[0027] Step 3, heat the solid powder obtained in step 2 in a 5vt% hydrogen-argon gas mixture atmosphere and a temperature of 200°C for 3h, cool to room temperature, and grind for 30min with a ball mill at a speed of 100r / min to obtain the desired single atom The catalyst, the transition metal contained in the prepared catalyst is anchored on the defect site on the surface of the sup...

Embodiment 3

[0029] Step 1, add 200g / L cobalt chloride in water and ethanol (volume ratio is 1:1) solution to alumina (inorganic aluminum-based carrier), wherein the mass ratio of transition metal to carrier is 1:200, and the resulting solution is 100kHz Ultrasonic 30min under the condition of uniform dispersion, and then the mixed solution was stirred at 200r / min for 48h;

[0030] In step 2, the mixed solution obtained in step 1 is heated to the boiling point of the mixed solution, evaporated at high temperature, evaporated to dryness, and fully ground for 3 hours with a ball mill at a speed of 500 r / min to obtain a solid powder;

[0031] Step 3, heat the solid powder obtained in step 2 in a 5vt% hydrogen-argon gas mixture atmosphere and a temperature of 800°C for 4h, cool to room temperature, and grind for 40min with a ball mill at a speed of 500r / min to obtain the desired catalyst. The transition metal contained in the prepared catalyst is anchored on the defect site on the surface of t...

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Abstract

The invention belongs to the technical field of monatomic catalysts, and relates to application of a monatomic catalyst in the field of environmental protection. According to the application of the monatomic catalyst as a wastewater treatment flocculant, the monatomic catalyst is composed of a carrier and transition metal, and the carrier is any one of an inorganic calcium-based carrier, an inorganic silicon-based carrier, an inorganic aluminum-based carrier and an inorganic titanium-based carrier; the transition metal is selected from one or more of first transition metal and second transition metal; and the transition metal is anchored at a defect site on the surface of the carrier in a monatomic form. Compared with a traditional water treatment flocculant, the monatomic catalyst has a more excellent flocculation effect. The monatomic catalyst does not need any auxiliary condition, and can efficiently flocculate suspended matters in water to generate particles with larger volume andlarger mass than water, so that the particles can be quickly settled to the water bottom. Therefore, the purpose of removing suspended matters is achieved, no pollution is caused to the environment, and no side effect is caused to organisms.

Description

technical field [0001] The invention belongs to the technical field of single-atom catalysts and relates to the application of single-atom catalysts in the field of environmental protection. Background technique [0002] In recent years, single-atom catalysts have rapidly developed into the hottest frontier field in the field of science, setting off an enthusiastic research boom in the field of science. As the name suggests, single-atom catalysts refer to catalysts in which isolated single atoms are dispersed on a carrier. Single-atom catalysts are considered to be homogeneous in communication due to their advantages of nearly 100% atom utilization, easy adjustment of active sites, and easy separation from reactants. A bridge between catalysts and heterogeneous catalysts. At present, single-atom catalysts have shown excellent activity, selectivity and stability in a series of reactions, such as water-gas shift, hydrogenation, water electrolysis, oxygen reduction, etc., and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236
Inventor 赵超黄红锋吴宇波
Owner LINKWAY TECH CO LTD
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