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A method for preparing magnetic adsorbent by using waste zinc-manganese batteries and biomass

A magnetic adsorbent, zinc-manganese battery technology, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problem of high production cost and process requirements, difficult powder agglomeration, equipment materials and safety High requirements and other issues, to achieve the effect of high value-added resource utilization

Active Publication Date: 2020-08-11
YANAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this wet extraction process with high-concentration strong acid as the main working medium has high requirements on equipment materials and safety
In the wet preparation method of soft magnetic materials, the chemical co-precipitation method is simple and easy, but the powder agglomeration of the finished product is difficult to overcome; sol-gel, self-propagating high-temperature synthesis products have uniform particles, small particle size, large specific surface area, Strong activity, but high production cost and process requirements
In addition, existing soft magnetic materials have not been used as adsorbents in sewage treatment

Method used

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  • A method for preparing magnetic adsorbent by using waste zinc-manganese batteries and biomass
  • A method for preparing magnetic adsorbent by using waste zinc-manganese batteries and biomass
  • A method for preparing magnetic adsorbent by using waste zinc-manganese batteries and biomass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1. Take the electrode material of the waste zinc-manganese battery, grind the battery electrode material into powder and pass it through a sieve to obtain electrode powder with a particle size of less than 125 μm;

[0046] Step 2, with sulfur powder and ferrous sulfate as the mixed energy substrate, the mixed volume ratio is 1:1:1 Thiobacillus thiooxidans bacteria liquid, Leptospira ferrous oxide bacteria liquid and Thiobacillus ferrooxidans bacteria The mixture was mixed to form a mixed leaching strain, and the mixed leaching strain was regularly inoculated and cultivated for 5 days in a shaker with a rotation speed of 150r / min and a temperature of 35°C with a mixed energy substrate and nutrient salts, and then centrifuged, After filtering, the biological extract is obtained;

[0047] During the inoculation process:

[0048] The solvent of nutrient salt is water, and the solute of nutrient salt is: (NH 4 ) 2 SO 4 , KH with a content of 1.0g / L 2 PO 4 , MgSO w...

Embodiment 2

[0056] Step 1. Take the electrode material of the waste zinc-manganese battery, grind the battery electrode material into powder and pass it through a sieve to obtain electrode powder with a particle size of less than 125 μm;

[0057] Step 2, with sulfur powder and ferrous sulfate as the mixed energy substrate, the mixed volume ratio is 1:1:1 Thiobacillus thiooxidans bacteria liquid, Leptospira ferrous oxide bacteria liquid and Thiobacillus ferrooxidans bacteria The mixture was mixed to form a mixed leaching strain, and the mixed leaching strain was regularly inoculated and cultivated for 3 days in a shaker with a rotation speed of 160r / min and a temperature of 40°C with mixed energy substrates and nutrient salts, and then centrifuged, After filtering, the biological extract is obtained;

[0058] During the inoculation process:

[0059] The solvent of nutrient salt is water, and the solute of nutrient salt is: (NH 4 ) 2 SO 4 , KH with a content of 1.0g / L 2 PO 4 , MgSO wi...

Embodiment 3

[0067] Step 1. Take the electrode material of the waste zinc-manganese battery, grind the battery electrode material into powder and pass it through a sieve to obtain electrode powder with a particle size of less than 125 μm;

[0068] Step 2, with sulfur powder and ferrous sulfate as the mixed energy substrate, the mixed volume ratio is 1:1:1 Thiobacillus thiooxidans bacteria liquid, Leptospira ferrous oxide bacteria liquid and Thiobacillus ferrooxidans bacteria The mixture was mixed to form a mixed leaching strain, and the mixed leaching strain was regularly inoculated and cultivated for 5 days in a shaker with a rotation speed of 130r / min and a temperature of 30°C with mixed energy substrates and nutrient salts, and then centrifuged, After filtering, the biological extract is obtained;

[0069] During the inoculation process:

[0070] The solvent of nutrient salt is water, and the solute of nutrient salt is: (NH 4 ) 2 SO 4 , KH with a content of 1.0g / L 2 PO 4 , MgSO wi...

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Abstract

A method for preparing a magnetic adsorbent by using waste zinc-manganese batteries and biomass disclosed by the invention is characterized in that the electrode materials of waste zinc-manganese batteries are firstly pretreated to prepare a bioleaching solution, and then indirect bioleaching is carried out , and finally carry out hydrothermal carbonization and synthesis to obtain a magnetic adsorbent. Using the filtrate of sulfur oxidizing bacteria and ferrous oxidizing bacteria to extract manganese and zinc metals in waste zinc-manganese batteries, the raw materials are easy to obtain, simple, efficient and environmentally friendly; the waste zinc-manganese batteries and biomass are converted into biologically activated carbon with magnetic adsorption properties, It can realize high value-added resource utilization of waste batteries and waste biomass.

Description

technical field [0001] The invention belongs to the technical field of adsorbent preparation, and relates to a method for preparing a magnetic adsorbent by utilizing waste zinc-manganese batteries and biomass. Background technique [0002] Waste zinc-manganese batteries contain about 12-28% zinc and 26-45% manganese. According to the statistics of China Battery Enterprises Association, in 2013, the consumption of zinc-manganese batteries in my country alone reached 31.8 billion, and zinc-manganese elements are the main elements in these batteries. ZnMn 2 o 4 , Mn 2 o 3 , Mn 3 o 4 and MnO 2 Such substances are mixed in the electrode material and are difficult to separate. The traditional hydrometallurgical recovery of zinc and manganese, such as electrowinning, extraction, sequential batch precipitation and other methods, requires higher process conditions and costs. [0003] In recent years, scholars at home and abroad have used strong acid to extract zinc and mangane...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/28009B01J2220/4825B01J2220/485B01J2220/4881B01J2220/4887C02F1/283C02F2101/20
Inventor 牛志睿喻伟东冯美宁张立
Owner YANAN UNIV
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