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Salt-containing wastewater resourceful treatment method

A technology for salty wastewater and treatment methods, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of low photon quantum efficiency, high cost, low efficiency of photocatalytic degradation of pollutants, etc. , to achieve the effects of inhibiting recombination, realizing recycling, and improving photon quantum efficiency

Inactive Publication Date: 2017-02-15
EAST CHINA UNIV OF SCI & TECH +3
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Problems solved by technology

However, because photogenerated electrons and holes are easily recombined in the photocatalytic process, the photon quantum efficiency of photocatalytic water splitting for hydrogen production and photocatalytic degradation of organic pollutants is very low. Photocatalytic water splitting for hydrogen production is still in the basic research stage, and photocatalytic degradation of pollution high efficiency and low cost

Method used

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  • Salt-containing wastewater resourceful treatment method

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Embodiment 1

[0039] Photocatalyst film modification of Ni sheet anode: TiO prepared by sol-gel method 2 / ZnO composite sol; the spin coating method is used to coat the Ni substrate, and the TiO can be obtained after drying and calcining. 2 / ZnO composite photocatalyst film modified anode. The specific steps are as follows: (1) Add 0.3 g of zinc acetate into 8.0 ml of triethanolamine, ultrasonically disperse for 30 min, heat in a water bath at 50° C. for 90 min, and centrifuge and wash the generated precipitate three times to obtain a ZnO precursor. (2) 2.5ml of tetrabutyl titanate, 0.5ml of acetylacetone, 0.5ml of diethanolamine and 10.0ml of absolute ethanol were mixed and stirred for 60 minutes to obtain a mixed solution A. (3) Add a mixed solution of 1ml of deionized water and 4.5ml of absolute ethanol dropwise to the mixed solution of A, after stirring evenly, add concentrated HCl dropwise to adjust the pH value of the solution to 4-5, and stir for 90min to obtain solution B. (4) Add...

Embodiment 2

[0047] Photocatalyst film modification of Ni sheet anode: preparation of TiO by hydrothermal method 2 Nanotube Film Modified Ni Sheet Anode. The specific steps are: weigh 0.5g of P25 nano powder and place it in a polytetrafluoroethylene autoclave with 50ml of 10mol / L NaOH, put the Ni sheet with the surface cleaned into the autoclave, seal it and put it in an oven Take it out after 383K heat preservation for 48h, cool to room temperature naturally, pour out the solution, wash the Ni sheet with distilled water until it is neutral, and then wash it with 0.1mol / L dilute hydrochloric acid to make Na + By H + Substituted, and then washed with distilled water to neutrality to obtain TiO 2 Nanotube Film Modified Ni Sheet Anode.

[0048] Preparation of simulated wastewater containing chromium and phenol: 12.88g Cr 2 (SO 4 ) 3 ﹒ 6H 2 O was dissolved in 300ml of 50mg / L phenol solution.

[0049] Photoelectrocatalytic treatment of chromium- and phenol-containing wastewater: Measur...

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Abstract

The invention relates to a salt-containing wastewater resourceful treatment method, which concretely comprises the following steps of adopting an alkaline electrolysis water hydrogen producing device as a basis, adopting a photocatalyst film modified Ni plate as an anode, and adopting salt-containing wastewater as electrolyte. Through a photoelectrocatalysis process achieved by irradiating the anode by a light source, the aim of wastewater resourceful treatment including degrading organic pollutants, recovering metal ions and producing hydrogen is achieved. According to the salt-containing wastewater treatment method provided by the invention, not only can the metal ions in wastewater be well recovered and can the difficult-to-degrade organic pollutants be well removed, but also hydrogen can be produced. The method is simple in process, and has a good wastewater treatment effect.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a method for resourceful treatment of salty waste water. Background technique [0002] Biochemical method (activated sludge method) is an important method of wastewater treatment, but if the water contains salt components, especially high-salt wastewater, it will have a great adverse effect on the cultivation and reproduction of bacteria, and saline wastewater in industrial wastewater Therefore, the development of saline wastewater treatment technology is very urgent. [0003] In addition to the water pollution problem, the energy problem also needs to be solved urgently. The rapid consumption of fossil energy such as coal and oil and the pollution to the environment make it urgent for human beings to find new clean energy. Hydrogen energy is recognized as clean energy. At present, hydrogen is mainly obtained through the reformation of fossil energy. This method of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F9/06C02F101/20C02F101/30
Inventor 宋晓丽胡旺光李秀春姬婷婷陈爱平
Owner EAST CHINA UNIV OF SCI & TECH
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