Preparation method of gold absorbent based on waste eggshell membrane biomaterial

A technology of biological materials and biomass materials, applied in the field of resource recovery, can solve problems such as optimization of the adsorption capacity of egg membrane adsorbents, failure to describe the adsorption behavior of precious metal gold, and unsatisfactory adsorbents, so as to achieve controllable product particle size and facilitate sustainable The effect of continuous growth, volume and uniformity improvement
CN103191701AActive Publication Date: 2013-07-10BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2013-07-10

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Abstract

The invention relates to a preparation method of a gold absorbent based on a waste eggshell membrane biomaterial, and belongs to the technical field of resource recycling. Through the acid pretreatment, protein hydrolysis and modified curing of an eggshell, a modified biological protein composite absorbent can be obtained. The cross-linked protein is changed to a water-soluble substance through the hydrolysis of the protein, internal functional groups also can be exposed, the modified curing process is carried out in the water solution, and the reaction uniformity is improved. The prepared absorbent contains a great amount of specific reactive functional groups for adsorbing gold ions, thereby having a special selective adsorption property for the gold ions. The preparation material is sourced from the kitchen waste eggshell, so that no only can the surface of the adsorbent have a plurality of protein groups of the eggshell membrane, but also the functional property of a modifier can be integrated. The raw materials of the absorbent are abundant, the cost is low, the process is simple, and the operating time is short; and moreover, the kitchen waste is used for recycling the gold to treat the waste by utilizing the waste, and a high adsorption property and an excellent practicability can be realized.
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Description

technical field

[0001] The invention relates to a method for preparing an adsorbent used for gold recovery, which uses biological waste egg film to recover gold, belongs to a green technology for comprehensive waste reuse, and belongs to the technical field of resource recovery. Background technique

[0002] With the development of the economy and the progress of the society, people's demand for gold is increasing. However, the reserves of mineral resources in our country are limited and the output is not high, which makes the resources increasingly tense. The rapid development of the electronics industry is accompanied by the continuous generation of electronic waste. The gold content in electronic waste far exceeds the average grade of gold mines. Many developed countries have turned their attention to the inexhaustible "rich mine" of renewable resources. Research data show that, calculated by the gold content per kilogram, the gold content of old household appliances is a...

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
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