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Nickel/zinc-manganese dioxide electrode and application thereof in wastewater treatment

A manganese dioxide electrode and electrode technology, applied in water/sewage treatment, water/sludge/sewage treatment, sterilization/microdynamics water/sewage treatment, etc., can solve the problem of tail water not meeting indirect discharge standards and environmental pollution and other problems, to achieve the effect of long service life, good adhesion and simple preparation method

Active Publication Date: 2021-02-05
ZHEJIANG SHUREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to research and surveys, chemical companies such as pharmaceuticals and printing and dyeing generally have the phenomenon that the tail water after biochemical treatment still cannot meet the indirect discharge standards.
If the industrial wastewater is discharged without effective treatment, it will cause serious pollution to the environment

Method used

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  • Nickel/zinc-manganese dioxide electrode and application thereof in wastewater treatment
  • Nickel/zinc-manganese dioxide electrode and application thereof in wastewater treatment
  • Nickel/zinc-manganese dioxide electrode and application thereof in wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Separation of battery powder:

[0024] (1.1) Take the "Super brand" waste zinc-manganese dry battery and disassemble it, separate the sealing ring, plastic film and paper scraps from the black paste, and dry the remaining solid at 80°C to obtain a black powder;

[0025] (1.2) Grind the black powder obtained in step 1.1, and sieve with a 200-mesh sieve;

[0026] (1.3) Sonicate the sieved powder in ultrapure water for 30 minutes, and centrifuge to wash away the residual NH in the powder 4 Cl and other impurities, and dried at 60°C to obtain a black powder containing zinc and manganese oxides; the centrifugation speed is 6000r / min, and the centrifugation time is 10min.

[0027] (2) Preparation of electrodes

[0028] (2.1) Place the nickel foam substrate (2cm×2cm) in sequence in 3mol / L HCl, absolute ethanol and deionized water for 30min ultrasonic pretreatment to remove NiO and impurities on the surface. After washing with deionized water, dry at 60℃ without Dry unde...

Embodiment 2

[0033] (1) Separation of battery powder:

[0034] (1.1) Take the "Super brand" waste zinc-manganese dry battery and disassemble it, separate the sealing ring, plastic film and paper scraps from the black paste, and dry the remaining solid at 100°C to obtain a black powder;

[0035] (1.2) Grind the black powder obtained in step 1.1, and sieve with a 400-mesh sieve;

[0036] (1.3) Sonicate the sieved powder in ultrapure water for 60 minutes, and centrifuge to wash away the residual NH in the powder 4 Cl and other impurities, and dried at 80°C to obtain a black powder containing zinc and manganese oxides; the centrifugation speed is 10000r / min, and the centrifugation time is 5min.

[0037] (2) Preparation of electrodes

[0038] (2.1) Place the nickel foam substrate (2cm×2cm) in sequence in 3mol / L HCl, absolute ethanol and deionized water for 30min ultrasonic pretreatment to remove NiO and impurities on the surface. After washing with deionized water, dry at 80°C Dry under oxygen...

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Abstract

The invention discloses a Ni / Zn-MnO2 electrode and application of the Ni / Zn-MnO2 electrode in wastewater treatment, belonging to the field of waste resource recycling. The electrode is prepared by thefollowing steps: disassembling, separating, grinding, screening, cleaning and drying a waste zinc-manganese dry battery to obtain black powder containing zinc-manganese oxide; and loading the powderon a foamed nickel substrate to prepare the Ni / Zn-MnO2 electrode. The electrode is applied to wastewater treatment to realize electrooxidation removal of pollutants in wastewater. According to the method, the waste zinc-manganese dry battery is reasonably utilized to prepare the efficient electrode in a mode of treating the waste with the waste, and the efficient electrode is applied to the fieldof wastewater treatment, so recycling of solid waste and reduction of pollutants are realized.

Description

technical field [0001] The invention belongs to the field of recovery and reuse of waste resources, and in particular relates to a Ni / Zn-MnO battery based on the recovery of waste zinc-manganese dry batteries. 2 Electrode, preparation method and its application in wastewater treatment. Background technique [0002] Used zinc-manganese dry batteries, as common household garbage, are rich in chemical substances such as zinc and manganese. If they are discarded randomly, it will not only cause a waste of metal resources, but also cause certain environmental pollution. Therefore, how to realize the reduction and recycling of waste zinc-manganese dry batteries is one of the current environmental protection hotspots. [0003] With the rapid development of my country's industry, the discharge of industrial wastewater is increasing, and the wastewater contains a large amount of pollutants such as COD and ammonia nitrogen. According to research and surveys, it is common for pharmac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467
CPCC02F1/46109C02F1/4672C02F2001/46138
Inventor 姚佳超梅瑜陈安妮叶人豪陈浚
Owner ZHEJIANG SHUREN UNIV
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