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Heavy metal ion negative pressure cavitation adsorption method

A technology of heavy metal ions and negative pressure cavitation, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc., can solve the problems that it is difficult to achieve the desired effect and meet the needs of large-scale wastewater treatment. Achieve the effects of eliminating radioactivity in wastewater, strong applicability, and high treatment efficiency

Inactive Publication Date: 2006-02-22
NORTHEAST FORESTRY UNIVERSITY +1
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Problems solved by technology

Traditional adsorption methods use expensive adsorbents such as activated carbon and ion exchange resins, which are difficult to meet the needs of large-scale wastewater treatment
When the solution concentration is reduced to 1×10 -3 When the (mass fraction) is below the order of magnitude, it is difficult to achieve the desired effect by chemical precipitation, solvent extraction, etc.

Method used

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  • Heavy metal ion negative pressure cavitation adsorption method

Examples

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example 1

[0016] Example 1: At room temperature, take 2 cavitation columns shown in Figure 1 and add the yeast suspension equivalent to 0.6g of dry yeast. Turn on the vacuum button to pump negative pressure, and at the same time, open the air inlet valve at the bottom of the cavitation column to start feeding Material, inhaled 200mL 50mg / L CuSO 4 Solution, after sampling, control the ventilation of one of them to 0.002m 3 / h, the negative pressure is -0.08MPa, perform small aeration and agitation adsorption, after 10 minutes, keep the negative pressure unchanged, and increase the ventilation to 0.12m 3 / h, negative pressure cavitation adsorption, after 50 minutes of adsorption, centrifugal separation of the yeast after adsorption of heavy metals, add 60ml of pH 0.7 water, control the negative pressure to -0.08MPa, and the air volume to 0.2m 3 / h for elution of heavy metals for 30 minutes, after elution, yeast can re-adsorb heavy metals. Control the ventilation of another cavitation column a...

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Abstract

The negative cavitation adsorption method by heavy metal ion is characterized in that, inputting an amount of biologic adsorbent in the negative cavitation adsorption device contained waste water with heavy metal of some concentration, controlling the negative pressure between -0.08--0.06MPa; taking little air flow adsorption of 0.002-0.03m3 / h for ten minutes; keeping the pressure, enlarging the air flow to 0.12-0.16m3 / h rapidly to cavitate for 20-50 minutes; the mixture and erosion effect of cavitation makes the biologic adsorbent cell produce periodic shrink and extension to force the adsorbed metal into membrane and increase adsorption radio; after adsorption, taking centrifugal separation the adsorbent; adding some water with pH value of 0.7-1.0, controlling the negative pressure between -0.08--0.06MPa and air flow of 0.2- 0.3m3 / h to recycle heavy metal analytically; thereby, the adsorbent is circulated to recycle heavy metal.

Description

Technical field [0001] The invention relates to a method for improving the adsorption rate of heavy metals by a biological adsorbent by using a negative pressure cavitation technology, in particular to an efficient low-concentration heavy metal industrial sewage treatment and a method for recovering precious heavy metals. Background technique [0002] Industrial wastewater and sludge often contain many heavy metals or radioactive metals, which bring serious harm to the environment. The traditional adsorption method uses expensive adsorbents such as activated carbon and ion exchange resin, which is difficult to adapt to the needs of large-scale wastewater treatment. When the solution concentration is reduced to 1×10 -3 When the mass fraction is below the order of magnitude, it is difficult to achieve the desired effect with chemical precipitation, solvent extraction and other methods. As a new method developed in recent years, the biosorption method has the characteristics of low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/62
Inventor 祖元刚王文杰赵修华李庆勇胡茂盛朱磊任远肖鹏
Owner NORTHEAST FORESTRY UNIVERSITY
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