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Agent and method for removing heavy metal complexes in electroplating wastewater

A technology for electroplating wastewater and heavy metals, applied in water pollutants, metallurgical wastewater treatment, chemical instruments and methods, etc., can solve the problem that electrochemical methods and advanced oxidation methods cannot be used alone, and ion exchange methods and membrane separation methods are easy to block. , The catalytic effect of catalytic materials is unstable, etc., to achieve the effect of reducing application cost, short reaction time and fast reaction speed

Active Publication Date: 2020-11-03
UNIV OF SHANGHAI FOR SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The research results show that the ion exchange method and membrane separation method are easy to block; the organisms in the activated sludge method have poor tolerance to high-concentration heavy metal pollutants, and are prone to failure due to biological poisoning; electrochemical methods and advanced oxidation methods generally cannot be used alone and deal with The effect is low, the treatment cost is high, and at the same time, due to many factors such as low activity of catalytic materials and unstable catalytic effect of catalytic materials, these methods are still in the laboratory state, and it is difficult to apply to large-scale actual wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The wastewater comes from the comprehensive wastewater of an electroplating factory. The concentration of T-Cu is 8.1mg / L, the concentration of T-Ni is 10.3mg / L, the concentration of T-Cr is 25.2mg / L, the concentration of CODCr is 709mg / L, and the concentration of TP is 448.6 mg / L, the concentration of NH3-N is 74.6mg / L, and the pH of the water is around 1.1. First, the wastewater is pretreated, and the impurity components in the wastewater are filtered out by sedimentation to prevent interference with subsequent experimental results.

[0029] Preparation of MnOx / FeOx / MgOx mixed solid powder: The raw material is selected from the iron and manganese tailings of a manganese ore enterprise in Hunan. The effective component in the tailings is the mixed system matching agent of MnOx / FeOx / MgOx. Particles with uniform particle size are used as drug 1.

[0030] The pretreated wastewater flows into the reaction tank, and 1 g / L of the above-mentioned prepared medicament (in term...

Embodiment 2

[0032] The wastewater comes from the comprehensive wastewater of an electroplating factory. The concentration of T-Cu is 8.1mg / L, the concentration of T-Ni is 10.3mg / L, the concentration of T-Cr is 25.2mg / L, the concentration of CODCr is 709mg / L, and the concentration of TP is 448.6 mg / L, the concentration of NH3-N is 74.6mg / L, and the pH of the water is around 1.1. First, the wastewater is pretreated, and the impurity components in the wastewater are filtered out by sedimentation to prevent interference with subsequent experimental results.

[0033]Preparation of mixed solid powder of MnOx / FeOx / MgOx: The raw material is selected from the iron and manganese tailings 2 of a manganese mining enterprise in Hunan, grinded, and the particles with uniform particle size are screened out as the agent 2.

[0034] The pretreated wastewater flows into the reaction tank, and 1 g / L of the above-mentioned prepared medicament (in terms of Fe mass) is added. After stirring and reacting for 60...

Embodiment 3

[0036] The wastewater comes from the comprehensive wastewater of an electroplating factory. The concentration of T-Cu is 8.1mg / L, the concentration of T-Ni is 10.3mg / L, the concentration of T-Cr is 25.2mg / L, the concentration of CODCr is 709mg / L, and the concentration of TP is 448.6 mg / L, the concentration of NH3-N is 74.6mg / L, and the pH of the water is around 1.1. First, the wastewater is pretreated, and the impurity components in the wastewater are filtered out by sedimentation to prevent interference with subsequent experimental results.

[0037] Preparation of mixed solid powder of MnOx / FeOx / MgOx: The raw material is selected from the iron and manganese tailings 3 of a manganese mining enterprise in Hunan, ground, and the particles with uniform particle size are screened out as the agent 3.

[0038] The pretreated wastewater flows into the reaction tank, and 1 g / L of the above-mentioned prepared medicament (in terms of Fe mass) is added. After stirring and reacting for 60...

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PUM

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Abstract

The invention discloses an agent and method for removing a heavy metal complex from electroplating wastewater. Mixed solid powder containing MnOx, FeOx and MgOx according to a mass ratio of 5:2:1 and pretreated electroplating wastewater are fully mixed, and are stirred to fully react the mixed solid powder with the electroplating wastewater for 20-60 min, the MnOx / FeOx / MgOx mixed solid powder has a strong oxidation effect in the presence of Ni (II) at a pH value being less than 5, and intermediate state iron and manganese oxides having certain oxidation and adsorption ability are simultaneously generated to realize in-situ oxidation complex breaking, adsorption site snatching complex breaking and co-precipitation acceleration. The agent and the method can remove heavy metals and metalloids As and Se from the electroplating wastewater at a time, the removed heavy metals mainly exist in a manganese mine material or on surface particles, and solid-liquid separation is realized through coagulation precipitation in order to remove the heavy metals from the electroplating wastewater.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a medicament for removing heavy metal complexes in electroplating wastewater and a method thereof. Background technique [0002] In recent years, with the continuous development of the electroplating industry, more and more electroplating enterprises have entered the villages and towns in the vast underdeveloped areas of central and western China from the eastern coastal areas, and the harmful range of electroplating wastewater has further expanded throughout the country. In addition, electroplating wastewater is one of the industrial wastewater with the largest annual discharge in my country, with an average annual discharge of 4 billion tons, accounting for about 1 / 6 of the total industrial wastewater discharge. Electroplating wastewater with a wide range of pollution and a large overall volume has become an environmental problem that cannot be ignored more and m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F101/20C02F101/22C02F103/16
CPCC02F1/5245C02F2001/007C02F2101/20C02F2101/22C02F2103/16
Inventor 刘洪波薛璐璐符策竿管祥雄陈子华熊亚波姚洋洋宋筱关永年许小燕张泾凯
Owner UNIV OF SHANGHAI FOR SCI & TECH