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Method for treating nickel/copper-containing electroplating wastewater by using weak acid ion exchange fibers

An ion-exchange fiber and ion-exchange technology, applied in the field of electroplating wastewater treatment, can solve problems such as differences, small amount of treated wastewater, and single metal ion components, and achieve high efficiency, fast desorption rate, and large adsorption capacity.

Inactive Publication Date: 2014-04-02
佛山市中耀卓邦企业管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, there have been reports on the adsorption performance of nickel-containing wastewater by using strong and weak acid ion exchange fibers, but most of them are limited-bath and single-column adsorption processes under laboratory conditions. There are differences in wastewater, and the amount of wastewater treated is small

Method used

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  • Method for treating nickel/copper-containing electroplating wastewater by using weak acid ion exchange fibers
  • Method for treating nickel/copper-containing electroplating wastewater by using weak acid ion exchange fibers
  • Method for treating nickel/copper-containing electroplating wastewater by using weak acid ion exchange fibers

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] b. Pretreatment of weak acid ion exchange fibers: 2g of weak acid ion exchange fibers (the weak acid ion exchange fibers are ion exchange fibers prepared according to the technical scheme of Patent No. 200410060275.0) are wet loaded into Φ10×300mm ion exchange columns, and then Use sodium hydroxide solution with a concentration of 1mol / L to wash and transform the ion exchange fiber in the column through the ion exchange column (the rate of sodium hydroxide solution passing through the column during the washing process is 1ml / (min·g)), and the ion exchange The fibers are all converted into Na-type ion exchange fibers (at this time, the pH of the effluent from the ion exchange column is >10); then the column is washed with deionized water until neutral, and the treated ion exchange column equipped with ion exchange fibers is obtained;

[0034] c, the electroplating waste water after the pretreatment of step a is passed into the ion exchange column that the ion exchange fib...

Embodiment 2

[0043] The concentration of nickel in the original nickel-containing electroplating wastewater was 197.55 mg / L, the concentration of calcium was 52.9 mg / L, and the concentration of magnesium was 31.4 mg / L;

[0044] b. Pretreatment of weak acid ion exchange fibers: 1.39g of weak acid ion exchange fibers (the weak acid ion exchange fibers are ion exchange fibers prepared according to the technical scheme of Patent No. 200410060275.0) are wet-loaded into Φ10×300mm ion exchange columns, Then use sodium hydroxide solution with a concentration of 1mol / L to wash and transform the ion exchange fiber in the column through the ion exchange column (the rate of sodium hydroxide solution passing through the column during the washing process is 1ml / (min·g)), and the ions The exchange fibers are all converted into Na-type ion exchange fibers (at this time, the pH of the effluent from the ion exchange column is >10); then the column is washed with deionized water until neutral, and the treated...

Embodiment 3

[0055] The concentration of nickel in the original nickel-containing electroplating wastewater is 30-40mg / L, the concentration of calcium is 0-10mg / L, the concentration of magnesium is 0-10mg / L, and the pH is 6-7;

[0056] b. Pretreatment of weak acid ion exchange fibers: Weigh 1.5146g of weak acid ion exchange fibers (the weak acid ion exchange fibers are ion exchange fibers prepared according to the technical scheme of patent No. 200410060275.0) and wet install them on Φ10×300mm ion exchange columns , and then use a sodium hydroxide solution with a concentration of 1mol / L to wash and transform the ion-exchange fiber in the column through the ion-exchange column (the rate of sodium hydroxide solution passing through the column during the washing process is 1ml / (min·g)), and the The ion-exchange fiber is converted into Na-type ion-exchange fiber. When the pH of the effluent is > 10, the fiber is completely converted into Na-type; then the column is washed with deionized water u...

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Abstract

The present invention discloses a method for treating nickel / copper-containing electroplating wastewater by using weak acid ion exchange fibers. The method comprises: carrying out a pre-treatment on electroplating wastewater; filling fibers in an ion exchange column to carry out treatment transformation to obtain a treated ion exchange column, wherein the original fibers are transformed into the Na type fibers; connecting 1-4 treated ion exchange columns in series to form an ion exchange system; introducing the treated electroplating wastewater into the ion exchange system to carry out an absorption treatment, and directly discharging when the metal ion concentration in the effluent is less than 0.5 mg / L; adjusting the flow rate of the wastewater to make the first absorption column achieve a saturated state when the wastewater penetrates through the last absorption column, and carrying out elution regeneration recycling on the saturated absorption column; and carrying out absorption cycle operation. According to the present invention, the method is the process method for quickly and efficiently removing heavy metal ions in electroplating wastewater and concurrently obtaining a high purity and high concentration eluent, and the obtained eluent can be used for electrolysis so as to obtain zero-valent metal nickel / copper.

Description

technical field [0001] The invention relates to a treatment method for electroplating wastewater, in particular to a method for treating nickel / copper-containing electroplating wastewater by using weak acid ion exchange fibers. Background technique [0002] The source of electroplating wastewater: the general electroplating production process is composed of three parts: electroplating pre-treatment process, electroplating process and electroplating post-treatment process. Each process has wastewater to a certain extent. Among them, the plating piece rinsing wastewater in the electroplating production process is electroplating One of the main sources of wastewater, accounting for about 80% of workshop wastewater discharge. [0003] The necessity of treating electroplating wastewater: heavy metals are difficult to degrade in nature, and have strong concealment and enrichment. Irrigation of farmland with wastewater containing heavy metals will affect the yield and quality of cr...

Claims

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Application Information

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IPC IPC(8): C02F1/42C02F9/04
Inventor 原思国张捷宋艳阳代立波惠跟雷冯俊波
Owner 佛山市中耀卓邦企业管理有限公司
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