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Treatment method of complexing nickel wastewater

A treatment method and technology for nickel wastewater, which is applied in special compound water treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of narrow light absorption range of photocatalyst, inability to meet the standard stably, low adsorption rate, etc., and achieve resource The effect of reusing, increasing the number of reuses, and facilitating the collection of materials

Inactive Publication Date: 2017-03-15
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from the perspective of practical application, there are still many problems in the photocatalytic method: such as the low adsorption rate of heavy metal ions on the surface of the photocatalyst, the narrow light absorption range of the photocatalyst, etc.
[0008] Complex heavy metals are heavy metal wastewater that is difficult to treat. In order to meet my country's continuously improving wastewater discharge standards, enterprises have adopted more complex processes and increased treatment costs, but they still cannot meet the status of standards stably. Therefore, new Processing methods and processes are particularly important

Method used

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  • Treatment method of complexing nickel wastewater

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Embodiment 1

[0039] A treatment method for complexed nickel waste water, comprising the following steps:

[0040] 1) Use commercially available general-purpose granular activated carbon (through a 20-40 mesh sieve), whose parameters are: methylene blue adsorption value ≥ 120mg / g, specific surface area > 800m 2 / g, put granular activated carbon in deionized water, heat and boil in an electric furnace for 40min, wash with ultrapure water, and dry in a vacuum oven at 105°C overnight; add 3mmol NH 4 Fe(SO 4 ) 2 12H 2 O was dissolved in 40ml of deionized water, then 3ml of cyclohexylamine was added dropwise and vigorously stirred at 120r / min for 20 minutes, then the colloidal mixture and 2g of activated carbon passing through a 20-mesh sieve were mixed and added to a 60ml polytetrafluoroethylene reactor , and cooled at room temperature after reacting at 150°C for 12 hours. The final sample was washed 5 times with deionized water and ethanol, and dried in a vacuum oven at 60°C for 6 hours to...

Embodiment 2

[0044] A treatment method for complexed nickel waste water, comprising the following steps:

[0045] 1) Use commercially available general-purpose granular activated carbon (through a 20-40 mesh sieve), whose parameters are methylene blue adsorption value ≥ 120mg / g specific surface area > 800m 2 / g, the granular activated carbon was heated and boiled in an electric furnace for 40min, washed with ultrapure water, and dried overnight in a vacuum oven at 105°C; 3mmol NH 4 Fe(SO 4 ) 2 12H 2 O was dissolved in 50ml of deionized water, then 3ml of cyclohexylamine was added dropwise and vigorously stirred for 25 minutes, then the colloidal mixture was mixed with 2g of activated carbon crossing a 20-mesh sieve, added to a 60ml polytetrafluoroethylene reactor, and heated at 150 After reacting at ℃ for 10 hours, it was cooled at room temperature. The final sample was washed 4 times with deionized water and ethanol, and dried in a vacuum oven at 60°C for 6 hours to prepare Fe 2 o 3...

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Abstract

The invention discloses a treatment method of complexing nickel wastewater. Compared with the prior art, Fe is loaded on granular active carbon, and a supported Fe2O3.FeO / GAC catalyst is prepared, a heterogeneously activated persulfate system generates sulfate radical free radicals with the strong oxidizing property to oxidize complex form heavy metals in the wastewater, by damaging the stable structure of complexing ions, the heavy metals are freed from complex, and the heavy metals are removed through a simple alkaline chemical precipitation method. The Fe2O3.FeO / GAC activated persulfate coupling system is established, the pH value of the wastewater is adjusted through the actual condition of the wastewater during wastewater treatment, a good treatment effect can be achieved, the catalyst still has good catalytic activity after being reused, and the wastewater treatment cost can be greatly reduced. A large amount of equipment investment and operating cost is not needed, materials are easy to take, and operation is simple. The active carbon carrier can be reused, resource reuse is achieved, and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of complexed heavy metal wastewater treatment, and in particular relates to a treatment method for complexed nickel wastewater. Background technique [0002] Cleaning in industrial production processes such as electroplating and printed boards, discarded filtrate, plating solution taking out, running, escaping, leaking, ground washing, and various heavy metal ions such as copper, lead, zinc, and chromium caused by improper operation management and a certain concentration of organic pollutants. Complexing agents such as EDTA and citric acid are widely used in electroplating and other industries, and they form stable chelate compounds with metal ions such as nickel and copper. Due to the strong binding ability between the ligands, it is difficult to obtain a satisfactory treatment effect by ordinary alkali precipitation method, making wastewater containing complexed heavy metals a typical treatment difficulty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08B01J23/745C02F101/20
CPCB01J23/002B01J23/745C02F1/302C02F1/62C02F1/66C02F1/72C02F9/00C02F2101/20C02F2301/08C02F2305/02
Inventor 唐海张昊楠李洋秦宝雨徐建平
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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