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A method for recovering copper and cadmium and preparing cadmium bronze precursor in a compact bioelectrochemical reactor

A technology of bioelectrochemistry and reactor, which is applied in the field of bioelectrochemistry, can solve the problems of high cost, difficult metal recovery, and difficult reaction control, etc., and achieve the effect of convenient operation, efficient recovery, and compact reactor structure

Inactive Publication Date: 2017-01-18
DALIAN UNIV OF TECH
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Problems solved by technology

The disadvantages of these methods are mainly the large amount of treatment agent used, the reaction is not easy to control, easy to secondary pollution, high cost, difficult to recover metals, high energy consumption, etc.

Method used

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  • A method for recovering copper and cadmium and preparing cadmium bronze precursor in a compact bioelectrochemical reactor
  • A method for recovering copper and cadmium and preparing cadmium bronze precursor in a compact bioelectrochemical reactor
  • A method for recovering copper and cadmium and preparing cadmium bronze precursor in a compact bioelectrochemical reactor

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Embodiment 1

[0030] Step 1: Build the reactor, such as figure 1 Shown: the anode chamber 7 and the cathode chamber 8 of the reactor are made of plexiglass, the volume of the solution in the anode chamber is 15mL, and the solution volume in the cathode chamber is 25mL, separated by an ion exchange membrane (CMI-7000) 6, connected in series with a 200Ω outer tube in the MFCs mode Resistor 10, in MECs mode, connect 10Ω resistor 11 in series and apply 0.5V voltage.

[0031] Step 2: Place the reactor anode electrode (carbon rod and carbon felt) and cathode electrode (carbon cloth) in the reactor anode chamber 7 and cathode chamber 8 respectively. The apparent size of the carbon rod (Beijing Sanye Carbon Material Co., Ltd.) is , carbon felt (Beijing Sanye Carbon Materials Co., Ltd.) with an apparent size of 3.0cm×2.0cm×1.0cm). The reference electrode 2 is connected to the cathode chamber of the reactor, and the voltage across the resistor 11 is collected through the computer and the data acqu...

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Abstract

The invention provides a method for recycling copper and cadmium and preparing a cadmium bronze precursor employing a compact biological electrochemical reactor, and belongs to the technical field of bioelectrochemistry. A biological electrochemical reactor is switched into a mode of a microbial fuel cell or a microbial electrolysis cell through a relay switch; external resistors are connected in series in the mode of the microbial fuel cell; small resistors are connected in series in the mode of the microbial electrolysis cell; a power supply is externally connected; a mixed salt solution of Cu(II) and Cd(II) is enclosed into a cathode room of the reactor; a cathode and an anode of the reactor adopt conductive carbon materials; and the cathode room of the reactor is inoculated with sludge of a settling pond of a sewage treatment plant as electrochemical active microbes. The method is clean and efficient in process, compact in reactor, simple in structure and convenient to operate, and has a good application prospect in treatment of copper and cadmium wastewater treatment and preparation of the cadmium bronze precursor.

Description

technical field [0001] The invention belongs to the technical field of bioelectrochemistry, uses microbial fuel cells (MFCs) to selectively separate and recycle copper from copper-cadmium wastewater; and switches the MFCs to the microbial electrolysis cell (MECs) mode without changing the main body of the reactor , and further recover the metal cadmium in the above wastewater, which has the characteristics of compact reactor structure and convenient operation. Based on the catalysis of copper recovery in MFCs mode, the system utilizes copper in situ and realizes efficient recovery of cadmium. The resulting copper-cadmium complex is the precursor and raw material for preparing cadmium bronze with good electrical and thermal conductivity. Background technique [0002] Heavy metal copper and cadmium are widely used in many fields of industrial production, such as alloys, electroplating, neutron absorption control rods, pigments, plastic stabilizers, phosphors, insecticides, fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/24H01M8/16
CPCC25C1/24H01M8/16Y02E60/50
Inventor 黄丽萍王强全燮潘玉珍杨金辉
Owner DALIAN UNIV OF TECH
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