Adsorption and magnetic separation coupling method for recycling precious metal ion in precious metal

A precious metal and metal ion technology, applied in the field of precious metal ion recovery, can solve the problems of low mechanical strength, difficult separation, small size of biological particles, etc.

Inactive Publication Date: 2009-01-14
TIANJIN UNIVERSITY OF TECHNOLOGY
View PDF1 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the wet recovery technology, the biosorption method has the advantages of high recovery efficiency, wide range of sources of biosorbents, and low operating costs. However, due to the small size and low mechanical strength of free biological particles, it is difficult to remove metals from the solution after adsorbing them. Separation, making biosorption technology mostly still in the laboratory stage
[0006] So far, there is no method that can effectively utilize and recover precious metal ions in wastewater solutions under the premise of ensuring high efficiency and environmental protection

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Adsorption and magnetic separation coupling method for recycling precious metal ion in precious metal
  • Adsorption and magnetic separation coupling method for recycling precious metal ion in precious metal
  • Adsorption and magnetic separation coupling method for recycling precious metal ion in precious metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example of detection of adsorption effect of magnetotactic bacteria MTB-3 (Magnetotactic Bacterium) on a single precious metal ion.

[0047] First, pour the prepared 50mL solution containing 80mg / L single precious metal ion into the adsorber, adjust the pH value of the solution, then add MTB-3 to prepare a wet bacterial concentration of 10g / L, and seal it with a cotton plug. Close the feeding port, and keep the temperature at 25°C for 1 hour in a constant temperature refrigerated shaker. Subsequently, sampling 10ml is filtered through microporous filter membrane (aperture 0.22 μm), uses HITACHI (Hitachi) 180-80 type atomic absorption spectrophotometer to measure the content of precious metal ion, and the specific adsorption effect of measuring is as shown in table 1:

[0048] Table 1 The adsorption effects of MTB-3 cells on various metal ions

[0049] Metal ion

Au 3+

PD 2+

Ag +

Pt 4+

Cu 2+

Ni 2+

initial pH

2 ...

Embodiment 2

[0055] Example of the detection of the competitive adsorption characteristics of MTB-3 bacteria to the coexistence system of various metal ions.

[0056] According to the experimental method described in the above-mentioned embodiment one, carried out containing Au 3+ 、Cu 2+ and Ni 2+ Adsorption experiments of two-component and three-component systems. Specifically, 50 mL of a solution containing 80 mg / L of a single precious metal ion or 80 mg / L of multiple metal ions is prepared in the adsorber each time.

[0057] For a single Au ion solution, adjust its pH value to 2; for a solution containing two components of Cu and Ni, adjust its pH value to 5; and for a solution containing three components of Au, Cu, and Ni, adjust its pH value to 2. Then add magnetotactic bacterium MTB-3, prepare it to a wet bacterial concentration of 10g / L, seal the feeding port with a cotton plug, and keep the temperature at 25°C for 1 hour in a constant temperature refrigerated shaker. see fig...

Embodiment 3

[0060] The specific embodiment of the adsorption recovery process taking gold and copper two kinds of precious gold ions as examples.

[0061] containing Au 3+ -Cu 2+ In the two-component solution, the pH value of the solution was adjusted to 2, and the magnetotactic bacteria MTB-3 on Au 3+ The adsorption amount is the largest, while for Cu 2+ The adsorption amount of is suppressed; if the pH value is adjusted to 5, the Cu 2+ maximum adsorption capacity. Therefore, proposed methods including adjusting the pH value to selectively adsorb metal ions Au 3+ And recovery of gold, adsorption of metal ions Cu 2+ And recover copper two-stage adsorption and magnetic separation coupling technology.

[0062] See the specific process image 3 , image 3 It is a schematic diagram of the process flow of the adsorption magnetic separation coupling method taking gold and copper as examples of two precious metals, image 3 Medium, C 0 Refers to the initial concentration of metal ions ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an adsorption and magnetic separation coupling method for recovering noble metal ions in wastewater, comprising the steps of: firstly, selecting and adsorbing noble metal ions in a solution by magnetotactic bacteria in an adsorber; secondly, separating out the magnetotactic bacteria after adsorbing the metal ions from the mixture obtained in the first step by utilizing a magnetic separator; and thirdly, implementing the metal ion desorption treatment to the magnetotactic bacteria separated off from the second step and adsorbed with noble metal ions, and if an electrolytic method is adopted to carry out the further purification and recovery, the noble metal in wastewater can be finally acquired. The method utilizes the selective adsorption characteristic of magnetotactic bacteria and combines the high gradient magnetic separation technique to recover noble metal ions efficiently from liquid and purify the wastewater. The noble metal ions in the wastewater solution can be utilized and recovered effectively on the premise of ensuring high efficiency and environmental protection through implementing the technical proposal of the method.

Description

technical field [0001] The present invention relates to the technical field of recovery of precious metal ions, in particular to an adsorption and magnetic separation coupling method for recovering precious metal ions in waste water. The method proposes an adsorption and magnetic separation coupling process, utilizing the selective adsorption characteristics of magnetotactic bacteria Combined with high-gradient magnetic separation technology, precious metal ions can be efficiently recovered from the solution and wastewater can be purified. Background technique [0002] At present, precious metals are widely used in aviation, aerospace, navigation, missiles, rockets, atomic energy, microelectronics technology, chemical industry, inorganic materials, air purification and metallurgy and other industries. With the rapid development of the national economy, the demand for precious metals is also increasing. Today, when the available precious metal resources are limited, the cont...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F1/48C02F3/34
Inventor 孙津生尹晓红宋惠平孙长江
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap