Method for removing sulfate solution chloride ions through electric absorption of three dimensional electrodes

A sulfuric acid system and three-dimensional electrode technology, applied in the field of water pollution treatment, can solve the problems of inability to treat high-concentration chlorine-containing wastewater, thin plates to limit industrial application, and poor electro-adsorption technology, saving implementation time and removing effects. Obvious, easy-to-buy effect

Active Publication Date: 2016-08-31
CENT SOUTH UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and efficient method for removing high-concentration chloride ions in a sulfuric acid system in view of the problem that the existing electro-adsorption technology cannot be industrialized well and can only treat low-concentration chlorine-containing wastewater
This method solves the problems that the amount of general electro-adsorption electrode material is small, the plate is thin, which limits industrial application and cannot handle high-concentration chlorine-containing wastewater.

Method used

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  • Method for removing sulfate solution chloride ions through electric absorption of three dimensional electrodes
  • Method for removing sulfate solution chloride ions through electric absorption of three dimensional electrodes

Examples

Experimental program
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Effect test

Embodiment 1-3

[0019] Weigh 42g of activated carbon and fill it in the anode area, use lead plates and titanium plates for the cathode and anode respectively, and use a peristaltic pump to circulate and absorb 500ml of Cl at a speed of 40rpm - The concentration is 1000mg / L, SO 4 2- The adsorption solution is 1200mg / L. During the adsorption process, the pH of the solution is controlled to be 2, and the anode potential is controlled to be 0.7V, 1.0V, and 1.4V. After 2 hours of adsorption, the sample is measured.

[0020] The adsorbed solution was filtered with a 0.22 μm filter head, and the chlorine ion content was analyzed using 883 Metrohm ion chromatography. The results showed that with the increase of adsorption time, the electro-adsorption effect increased obviously, and after 2 hours, it basically tended to be stable, and the effluent concentrations were 491mg / L, 455mg / L, and 420mg / L, respectively.

Embodiment 4

[0022] Determination of lead anodic polarization curve. The pure lead electrode is used as the working electrode, the platinum electrode is used as the counter electrode, the saturated calomel electrode is used as the reference electrode, and the concentration of Cl is 1g / L - and 2g / L of SO 4 2- As the electrolyte, the anodic polarization curve of lead was measured, from which it can be concluded that the maximum potential of anodic polarization adsorption is 1.5V.

Embodiment 5-7

[0024] Weigh 42g of activated carbon and fill it in the anode area, use lead plates and titanium plates for the cathode and anode respectively, and use a peristaltic pump to circulate and absorb 300ml of Cl at a speed of 40rpm - The concentration is 1000mg / L, SO 4 2- The adsorption solution is 1200mg / L. During the adsorption process, the pH of the solution is controlled to be 1, 2, and 4, and the anode potential is controlled to be 1.4V. After 2 hours of adsorption, the sample is measured.

[0025] The adsorbed solution was filtered with a 0.22 μm filter head, and the chlorine ion content was analyzed using 883 Metrohm ion chromatography. The results show that under the condition of pH 1-4, the electro-adsorption effect is obvious and basically stable.

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Abstract

The invention discloses a method for removing sulfate solution chloride ions through electric absorption of three dimensional electrodes. The method comprises the steps that an anode region is filled with activated carbon as a third electrode, anodic polarization is performed, a titanium plate is used as an anode, a lead plate is used as a cathode, and an insulation membrane is used for isolating a cathode region from the anode region; the pH value of chlorine-containing wastewater with the concentration of chlorine ions being 800-1200 mg / L is adjusted to 1-4, the wastewater is introduced into the three-dimensional electrodes, and the anodic polarization potential is controlled to be larger than 1.0 V and smaller than or equal to 1.5 V, a peristaltic pump is used for guiding wastewater inside an external circulating pond into a reactor through a peristaltic pump, the wastewater obtained after the reaction flows back to the circulating pond, and circulating water meeting the standard (300 mg / L) of the circulating cooling water quality is obtained after circulation is performed for a period of time. According to the method, equipment is simple, operation is convenient, particularly, the effect of treating sulfate solution high-concentration chlorine-containing wastewater is good, the cost of activated carbon is low, energy consumption is low, and industrial production and application are promoted.

Description

technical field [0001] The invention relates to a method for electro-absorbing high-concentration chlorine-containing wastewater in a sulfuric acid system by using a three-dimensional electrode method, and belongs to the technical field of water pollution treatment. Background technique [0002] With the development of my country's industry, a variety of industrial wastewater contains a large amount of chloride ions, such as: zinc hydrometallurgy, heavy non-ferrous metal smelting, condensation process, landfill, tanning technology, marine food and other production and treatment processes. A large amount of high-concentration chlorine-containing wastewater is produced. High-concentration chlorine-containing wastewater has problems such as corroding equipment, affecting product quality, destroying the natural ecological balance of water bodies, deteriorating water quality, polluting groundwater and drinking water sources, and harming human health. [0003] Generally, the treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469C02F101/12
CPCC02F1/4691C02F2101/12
Inventor 柴立元孙竹梅舒余德李青竹刘明诗王庆伟苏荣葵
Owner CENT SOUTH UNIV
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