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Up-to-standard treatment method and device for zinc-nickel alloy waste water

A zinc-nickel alloy and treatment method technology, which is applied in metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of unfavorable promotion and high treatment cost, and achieve low cost and simple equipment , Solving the effect of meeting emission standards

Inactive Publication Date: 2016-07-27
SHANGHAI LIGHT IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing cost of this method is very high, which is not conducive to popularization

Method used

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  • Up-to-standard treatment method and device for zinc-nickel alloy waste water
  • Up-to-standard treatment method and device for zinc-nickel alloy waste water
  • Up-to-standard treatment method and device for zinc-nickel alloy waste water

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0038]Take zinc-nickel alloy wastewater from a certain enterprise, adjust pH=2.5, add 1.0g ferrous sulfate + 4ml hydrogen peroxide per liter of wastewater, react for 3 hours, adjust pH to 12 and precipitate, add PAM to filter, take supernatant and pass through ion exchange resin , Determination of nickel and zinc concentrations in treated water.

[0039]

[0040] 1. In addition to using the ferrous / hydrogen peroxide system, the Fenton oxidation technology in this invention can also use the ferrous / ozone system;

[0041] 2. The ion exchange resin in this invention needs to adopt the ion exchange resin with the ability to adsorb metal ions, such as weak acid ion exchange resin, or chelating ion exchange resin, etc.

example 2

[0043] Take zinc-nickel alloy wastewater from a certain enterprise, pH<2.5, directly add 1.5g ferrous sulfate heptahydrate to each liter of wastewater, react for 30min, adjust pH to 9, aerate with ozone for 1h, add PAM to precipitate and filter, supernatant is ion exchanged resin.

[0044] sample name

[0045] raw water

[0046] Therefore, the embodiment of the present invention adopts the combination technology of Fenton oxidation-chemical precipitation-ion exchange adsorption to treat zinc-nickel alloy wastewater, which can solve the problem of discharge of zinc-nickel alloy wastewater up to the standard. This method and its equipment are simple, convenient to operate, low in cost, and have strong practicability. The effluent after zinc-nickel alloy wastewater treatment can stably meet the standards in Table 2 or Table 3 of "Electroplating Pollutant Discharge Standard GB21900-2008".

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Abstract

The invention relates to an up-to-standard treatment method and device for zinc-nickel alloy waste water; the method includes the following steps: the zinc-nickel alloy waste water is treated by a Fenton method, so as to carry out oxygenolysis of a part of organic pollutants in the waste water, to achieve the oxidative complex breaking effect and make complexation metal ions turned into a free state; the waste water treated through the Fenton method is treated by a chemical precipitation method, to make metal ions precipitated; and the waste water is subjected to heavy metal capture by ion exchange resin having the ability to adsorb the metal ions, so that the waste water stably reaches emission requirements.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment and water pollution control in electroplating or surface treatment industries, in particular to a standard-reaching treatment method for zinc-nickel alloy wastewater. Background technique [0002] Cadmium plating has excellent resistance to marine and atmospheric corrosion, but cadmium is a metal material that seriously pollutes the environment and endangers human health, while alkaline zinc-nickel alloy plating has the same resistance to marine and atmospheric corrosion as cadmium. Therefore, it has been used instead of cadmium plating in products such as auto parts. However, due to the use of chelating agents and complexing agents in electroplating zinc-nickel alloys, zinc-nickel alloy electroplating mainly uses zincate systems, which require the use of complex complexing agents and brighteners. The complexing agent mainly includes combinations of tartaric acid and its salts with p...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/16
Inventor 付丹
Owner SHANGHAI LIGHT IND RES INST
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