Method for absorbing and recovering metal nickel from electroplating wastewater

A technology for electroplating wastewater and metal nickel, which is applied in the direction of improving process efficiency, etc., can solve the problems of poor operability, long time-consuming, low adsorption efficiency, etc., and achieve the effect of being suitable for large-scale application, overcoming time-consuming, and improving adsorption efficiency

Active Publication Date: 2017-08-11
SHANGHAI WINNER ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods generally have the disadvantages of long time-consuming, poor operability and low adsorption efficiency.

Method used

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  • Method for absorbing and recovering metal nickel from electroplating wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This embodiment relates to the method for absorbing and reclaiming metal nickel from electroplating wastewater, comprising the following steps:

[0016] (1) Resin activation: Soak the resin in saturated brine for 18 to 24 hours, then drain the brine and rinse it with distilled water; then use 2% to 4% sodium hydroxide to soak for 2 to 4 hours, take it out and rinse until medium properties; finally soak in 5% hydrochloric acid for 4 to 8 hours, take it out and rinse until neutral to activate the resin to form an activated resin.

[0017] (2) Macroporous resin adsorption: Put the activated and pretreated resin into a dynamic adsorption device, and the resin dosage is 30 g / L. The height-to-diameter ratio of the dynamic adsorption device in this example is 5:1, the shape of the aeration hole is oval, the ratio of the aperture of the aeration hole to the height of the dynamic adsorption device is 1:20, and the aeration rate is 0.8m 3 / min, the resin forms a turbulent flow w...

Embodiment 2

[0021] This embodiment relates to the dynamic adsorption device used in Embodiment 1, and its structure is as attached figure 1 shown.

[0022] The dynamic adsorption device comprises a column body 1, a water inlet pipe 2, an outlet pipe 3, an air inlet pipe 4, an air outlet pipe 5 and an air pipe 6; the water inlet pipe 2 and the water outlet pipe 3 are respectively arranged at two ends of the column body 1; The body 1 also has a reaction chamber in which a carboxylic acid-based cationic resin is placed; the air pipe 6 is spirally installed in the reaction chamber; several aeration holes 7 are provided on the air pipe 6; The air inlet pipe 4 and the air outlet pipe 5 are communicated through the air pipe 6; the electroplating waste water enters the column body 1 forwardly from the water inlet pipe 2, and the aeration gas enters the column body 1 reversely from the air inlet pipe 4; and the activated carboxylic acid The base cationic resin and the electroplating wastewater fl...

Embodiment 3

[0024] This embodiment relates to the method for absorbing and reclaiming metal nickel from electroplating wastewater (the basic structure of the dynamic adsorption device used in this embodiment is composed of the same as that of the dynamic adsorption device in Example 2), comprising the following steps:

[0025] (1) Resin activation: Soak the resin in saturated brine for 18-24 hours, then drain the brine and rinse it with clean water; then soak it in 2%-4% sodium hydroxide for 2-4 hours, take it out and rinse until medium properties; finally soak in 5% hydrochloric acid for 4 to 8 hours, take it out and rinse until neutral to activate the resin to form a specific resin.

[0026] (2) Macroporous resin adsorption: Put the activated and pretreated resin into a traditional static adsorption device, and the resin dosage is 80 g / L. The height-to-diameter ratio of the dynamic adsorption device in this example is 10:1, the shape of the aeration hole is oval, the ratio of the apertu...

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Abstract

The invention belongs to the technical field of wastewater treatment, and discloses a method for absorbing and recovering metal nickel from electroplating wastewater. The method includes the steps that resin excitation is carried out; resin absorption is carried out; resin analysis is carried out; analysis water is subject to vacuum drying; and a finished product of the metal nickel is recovered. In the step of resin absorption, a dynamic absorption device is used, excited carboxylic acid base cation resin and electroplating wastewater continuously and dynamically flow in a column body of the dynamic absorption device in the reversed direction, and therefore the dynamic absorption process of the metal nickel is completed. By means of the method, the adsorption efficiency can be remarkably improved, and therefore the wastewater processing efficiency is improved; and in addition, the resin dynamic mode is high in maneuverability and suitable for large-scale application, resin regeneration is convenient and rapid, and the characteristics that traditional static resin is long in consumed time and low in absorption efficiency are avoided..

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a method for absorbing and recovering metallic nickel from electroplating wastewater. Background technique [0002] Nickel-containing wastewater mainly comes from wastewater and waste liquid produced by nickel mining, smelting, nickel electroplating operations, and electrochemical processing. Electroplating nickel wastewater only contains ordinary nickel ions, and nickel exists in wastewater in the form of divalent ions. If it is discharged directly, it will cause great pollution to the environment. [0003] Nickel-containing wastewater treatment and recovery technologies are currently commonly used methods at home and abroad: chemical precipitation, ion exchange, evaporation concentration, reverse osmosis, electrodialysis, ion and electric flotation, liquid membrane extraction, humic acid coal adsorption, etc. Among them, (1) chemical precipitation method is a meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B23/00C22B3/42
CPCC22B3/42C22B23/0453Y02P10/20
Inventor 张建鹏虞素飞李云峰徐伟
Owner SHANGHAI WINNER ENVIRONMENTAL TECH
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