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Electrode for selectively adsorbing noble metal and method for selectively recycling noble metal

A precious metal and selective technology, applied in the direction of improving process efficiency, can solve the problems of unsuitable metal recovery from wastewater, low concentration, and many types of metal ions, and can shorten the gold adsorption time, increase the amount of adsorption, and improve the adsorption efficiency. Effect

Active Publication Date: 2018-07-06
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these precious metals exist in large amounts of water and low-concentration wastewater, and there are many types of metal ions and low concentrations in wastewater. Therefore, considering the selective separation and recovery efficiency and environmental friendliness, the chemical precipitation method or ion ion Exchange method is not suitable for metal recovery from wastewater
[0004] Although microbial protein has a significant effect on the adsorption of medium / low concentration metal ions, and has the advantages of specificity / affinity and reversibility, but in general applications, protein adsorption materials are mostly in a suspension state, so subsequent solid-liquid adsorption is required. separation procedure

Method used

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  • Electrode for selectively adsorbing noble metal and method for selectively recycling noble metal
  • Electrode for selectively adsorbing noble metal and method for selectively recycling noble metal
  • Electrode for selectively adsorbing noble metal and method for selectively recycling noble metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0047] A.Materials and methods

[0048] 1. Strain activation and proliferation culture

[0049] Microthermophilic B-type Proteus (Tepidimonas fonticaldi sp.nov.) BCRC 80391 (November 21, 2011, publicly deposited in Bioresource Collection and Research Center (BCRC), Taiwan Food Industry Development Institute, China , this bacterium was also publicly deposited in the Belgian Culture Collection Center (Laboratorium voor. Microbiologie Gent'Belgium; LMG) on November 28, 2011, and its deposit number is LMG26746. Take it out of the library. 500 μL of frozen bacteria liquid was implanted into 50 mL of 1 / 5 TSB (Trypcase Soy Broth) liquid medium, and activated at a shaking rate of 180 rpm and 55°C for 24 hours. After the activation of the strain was completed, 1 mL of the activated bacterial liquid was implanted into 100 mL of liquid medium, and cultured for 2 days at a shaking rate of 180 rpm and 55° C. to obtain a fermentation liquid.

[0050] Afterwards, the fermentation broth wa...

preparation example 1

[0067] Cut the conductive heating carbon fiber cloth (CW) into 2*2cm 2 size.

[0068] After that, the carbon fiber cloth is subjected to acid oxidation, and the steps of acid oxidation are as follows.

[0069] First the carbon fiber cloth is washed with acetone. Next, the carbon fibers were placed in a 3M nitric acid solution and heat-treated at 70°C for 24 hours. The purpose of this step was to increase the carboxyl groups (-COOH) on the surface of the carbon fiber cloth. Afterwards, the carbon fiber cloth was washed with deionized water.

[0070] After washing, the carbon fiber cloth was soaked in 30 mL of protein suspension, and shaken at room temperature at 150 rpm for 24 hours, and then washed twice with deionized water (10 mL) to obtain a protein-immobilized carbon material electrode.

preparation example 2

[0072] Cut the conductive heating carbon fiber cloth (CW) into 2*2cm 2 size.

[0073] After that, the carbon fiber cloth is subjected to acid oxidation, and the steps of acid oxidation are as follows.

[0074] First the carbon fiber cloth is washed with acetone. Next, arrange the carbon fibers in a 3M nitric acid solution and heat-treat at 70°C for 24 hours. The purpose of this step is to increase the carboxyl group (-COOH) on the surface of the carbon fiber cloth to enhance the amidation effect on the surface of the carbon fiber cloth. Afterwards, the carbon fiber cloth was washed with deionized water.

[0075] After washing, the carbon fiber cloth is amidated, and the amidation steps are as follows.

[0076]The carbon fiber cloth was soaked in N-hydroxysuccinimide (N-hydroxysuccinimide, NHS) solution (as amidated coupling agent) (10mL; 50mg / mL; pH 2.99) and 2-(N-morpholine) ethanesulfonate Acid (2-Morpholino-ethanesulfonic acid, MES) buffer solution (10mL; 0.001M; pH 4.5...

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Abstract

The invention provides an electrode for selectively adsorbing noble metal. The electrode comprises an electrode body firmed by a carbon-contained material, and protein of bacteria of Tepidimonas is fixed to the electrode body formed by the carbon-contained material so as to form the electrode for selectively adsorbing the noble metal, wherein the noble metal comprises gold, palladium, silver or indium. The invention further provides a method for selectively recycling the noble metal by utilizing the electrode. The electrode for selectively adsorbing the noble metal and the method for selectively recycling the noble metal by using the electrode have the advantage that the adsorption capacity of the electrode can be effectively improved, the adsorption efficiency of the protein can be improved, the gold adsorption time is shortened, the required metal can be effectively and selectively adsorbed, and a high use value is achieved.

Description

technical field [0001] The invention relates to an electrode for selectively adsorbing valuable metals and a method for selectively recovering valuable metals. Background technique [0002] In the process of wastewater treatment and water recycling and reuse, the separation and recovery of precious substances has become an important issue in the world. How to obtain useful resources including water and precious substances from wastewater is a future trend. [0003] High-tech industry discharge water still contains gold, indium, gallium, molybdenum and other precious metals. However, these precious metals exist in large amounts of water and low-concentration wastewater, and there are many types of metal ions and low concentrations in wastewater. Therefore, considering the selective separation and recovery efficiency and environmental friendliness, the chemical precipitation method or ion ion Exchange methods are not suitable for metal recovery from wastewater. [0004] Alt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00C22B58/00
CPCC22B7/006C22B11/042C22B58/00Y02P10/20
Inventor 鐘琍菁颜嘉亨梁德明洪仁阳张敏超邵信刘柏逸方峙翔韩吟龙范愷军
Owner IND TECH RES INST
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