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Method for purifying water quality, and picking-up noble metal by using white envelope of biological waste

A precious metal and water purification technology, applied in chemical instruments and methods, other chemical processes, adsorbed water/sewage treatment, etc., can solve problems such as high infrastructure costs and operating costs, and achieve good social and environmental benefits. Extensive, simple and efficient effects

Inactive Publication Date: 2008-07-09
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this is a new sewage treatment method, the existing biosorbents and preparation methods are difficult to meet people's higher requirements for repairing heavy metal-contaminated water bodies, especially the requirements of low pollution, high efficiency, strong anti-interference ability, and separation and utilization of heavy metals. , and these treatment processes still need the help of complex process facilities, which have high infrastructure and operating costs, and the extraction of precious metals from sewage is still considered a future project

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Rinse the eggshell of the egg, soak it in 2mol / L dilute hydrochloric acid solution for about 0.3 hours, and then remove the egg membrane. Clean the egg membranes and blow them dry at room temperature, crush and sieve them into four sizes, the meshes are 16-30, 30-60, 60-120, 120-250 meshes, and then the egg membranes are The powder is filled into four filter columns respectively, and then the filter columns are connected in series according to the thickness of the egg film powder in the filter columns to obtain a high-efficiency purification device for sewage containing heavy metal ions.

[0019] Use 5mol / L dilute acetic acid solution to adjust the sewage containing lead ions to a pH range of 2 to 3, and pass through a series of filter columns at a rate of 0.5ml / min at room temperature, and perform coarse filtration and middle filtration in sequence. , After fine filtration, the absorption rate of lead ions can reach 92%. Afterwards, use ammonia solution for desorption...

Embodiment 2

[0021] Rinse the eggshell of the egg, soak it in 1mol / L dilute hydrochloric acid solution for about 1 hour, and then remove the egg membrane. Clean the egg membranes and blow them dry at room temperature, crush and sieve them into four sizes, the meshes are 16-30, 30-60, 60-120, 120-250 meshes, and then the egg membranes are The powder is filled into four filter columns respectively, and then the filter columns are connected in series according to the thickness of the egg film powder in the filter columns to obtain a high-efficiency purification device for sewage containing heavy metal ions.

[0022] Use 3mol / L dilute acetic acid solution to prepare the sewage containing lead ions to a pH range of 3 to 4, pass through the series filter column at a rate of 1ml / min at room temperature, and perform coarse filtration, medium filtration, and After fine filtration, lead ions are efficiently absorbed. Afterwards, use ammonia solution for desorption treatment, first soak the filter c...

Embodiment 3

[0024] Rinse the eggshells of the eggs, soak them in 1.5mol / L dilute nitric acid solution for about 0.5 hours, and then remove the egg membranes. After cleaning the egg film, blow it dry at room temperature, crush and sieve it into four sizes and specifications, the mesh numbers are 16-30, 30-60, 60-120, 120-250 mesh, and then the egg The membrane powder is respectively filled into four filter columns, and then the filter columns are connected in series according to the thickness of the egg membrane powder in the filter columns to obtain a highly efficient sewage purification device for heavy metal ions.

[0025] For sewage containing cadmium ions, use 5mol / L dilute ammonia water to adjust the pH to 12-13, pass through biological series columns at a speed of 0.5ml / min, and perform coarse filtration, medium filtration, and fine filtration in sequence, and cadmium ions are efficiently filtered Absorption, the absorption rate can reach 95%. Use dilute acetic acid solution for de...

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PUM

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Abstract

This invention relates to a method for purifying water and extracting noble metals by using a biological waste material, egg membrane. The method comprises: washing egg membrane, drying, pulverizing, screening 4 groups of egg membrane powder with different sizes as the wastewater purification membranes, filling into 4 filtration columns, connecting the columns in series according to the sizes of the egg membrane powder to obtain high-efficiency wastewater purification equipment, and utilizing the equipment to perform coarse filtration, middle filtration and fine filtration to obtain purified water. Heavy metals adsorbed by the filtration columns can be recovered. The filtration columns can be purified for recycling. The wastewater treatment membranes in this invention have such advantages as low cost and simple process, and can be used to treat wastewater containing low-concentration heavy metals, thus have wide potential applications.

Description

technical field [0001] The invention relates to a method for purifying water and extracting precious metals by using biological waste egg film, which is a technology for comprehensively treating environmental pollution by using waste to treat waste and reusing waste, especially referring to using biological waste to efficiently purify sewage while extracting precious metals Metal green technology is suitable for various industrial wastewater treatment systems and urban domestic sewage treatment, etc., and belongs to the technical field of environmental engineering sewage treatment. Background technique [0002] As environmental problems become more and more serious, the available fresh water resources are gradually decreasing, so how to reduce sewage discharge and effectively treat sewage has become an urgent problem to be solved worldwide. At present, the purification treatment of sewage can be summarized as physical, chemical and biological methods and technologies, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/24
Inventor 苏慧兰王娜张荻
Owner SHANGHAI JIAOTONG UNIV