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Method for removing heavy metals and blue-green algae in water

A heavy metal and water technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as unsatisfactory effect and efficiency, different efficiencies, etc., to achieve low cost, easy salvage, and improved adsorption efficiency Effect

Active Publication Date: 2020-06-19
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Water body pollutants mainly include heavy metals such as mercury and copper, and algae such as cyanobacteria and green algae. In the prior art, there are various treatment methods for heavy metals and algae, with different treatment effects and efficiencies.
In the same water body, there may often be various pollutants, so the treatment plan needs to be considered comprehensively, and there may be mutual influence, resulting in unsatisfactory effects and efficiency

Method used

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  • Method for removing heavy metals and blue-green algae in water
  • Method for removing heavy metals and blue-green algae in water
  • Method for removing heavy metals and blue-green algae in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Source of algae species: The algae species is a toxin-producing strain of Microcystis aeruginosa (FACHB905), which comes from the freshwater algae species bank of Wuhan Institute of Hydrobiology, Chinese Academy of Sciences. After three months of continuous culture, the normal growth was used for this experiment. Copper ions with a final concentration of 30 μM and mercury ions with a final concentration of 3 μM were added to the solution of toxin-producing strains of Microcystis aeruginosa, and the natural water bloom and heavy metal treatment were simulated under laboratory conditions.

[0029] Culture conditions

[0030] (1) The medium formula is: NaNO 3 1500mg / L, K 2 HPO 4 ·3H 2 O 40mg / L, MgSO 4 ·7H 2 O 75mg / L,

[0031] CaCl 2 2H 2 O 36mg / L, Na 2 CO 3 20mg / L, citric acid 6mg / L, ferric citrate 6mg / L, Na-EDTA1mg / L;

[0032] (2) Add 1.2L culture medium into a 2L Erlenmeyer flask, sterilize at 121°C for 30min, take it out when the pressure drops to zero, and...

Embodiment 2

[0037] Adopt experiment material described in embodiment 1 and culture condition, when Microcystis aeruginosa is in logarithmic phase and when growing well, carry out following experiment:

[0038] Get 25ml of Microcystis aeruginosa (FACHB905), add copper ions with a final concentration of 30 μM and mercury ions with a final concentration of 3 μM, and finally add L-cysteine ​​with a final concentration of 1 mM, and let stand for 2, 4, 6, After 8, 12, and 24 hours, measure the absorbance of the supernatant at 680 nm with an ultraviolet spectrophotometer.

[0039] see figure 2 , the sedimentation effect of Microcystis aeruginosa after standing at different time points is shown in figure 2 . Depend on figure 2 It can be seen that when the final concentration of L-cysteine ​​is 1mM, the number of cells in the supernatant becomes the least after standing for 6 hours.

Embodiment 3

[0041] An application based on L-cysteine ​​to remove heavy metals and cyanobacteria:

[0042] Add 6L of water bloom cyanobacteria algal solution to a 10L glass tank with a cell concentration of 1.68*10 7 A total of 6 tanks per cell / ml, respectively add copper ions with a final concentration of 30 μM and mercury ions with a final concentration of 3 μM in each tank, and the concentration of L-cysteine ​​obtained in case 1 in 3 glass tanks Add L-cysteine, and the remaining 3 glass cylinders are the control group without any treatment. Test every 2h and end after 6h.

[0043] see image 3 , Figure 4 , Figure 5 and Figure 6 , to detect algae cell concentration, copper ion concentration, mercury ion concentration and algae toxin concentration in the test group and control group respectively.

[0044] Over time, the concentration of algal cells in the control group ( image 3 ), copper ion concentration ( Figure 4 ), mercury ion concentration ( Figure 5 ), algal toxin ...

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Abstract

The invention belongs to the technical field of water pollutant treatment, and discloses a method for removing heavy metals and blue algae in water. The method comprises the following steps: adding aL-cysteine mother liquor into water, regulating the L-cysteine concentration of the water to 0.01-100mM, standing the water added with the L-cysteine for 2-24 hours, and performing algae-water separation after blue algae cells adsorb heavy metals and blue algae spontaneously flocculate and precipitate. The method for removing the heavy metals and the blue-green algae in the water can efficiently and synergistically realize efficient removal of the heavy metals and the blue-green algae.

Description

technical field [0001] The invention relates to the technical field of water body pollutant treatment, in particular to a method for removing heavy metals and blue-green algae in water. Background technique [0002] Water body pollutants mainly include heavy metals such as mercury and copper, and algae such as cyanobacteria and green algae. In the prior art, there are various treatment methods for heavy metals and algae, with different treatment effects and efficiencies. In the same water body, various pollutants may often exist, so the treatment plan needs to be considered comprehensively, and there may be mutual influence, resulting in unsatisfactory effects and efficiency. Contents of the invention [0003] The invention provides a method for removing heavy metals and blue-green algae in water, which achieves the technical effect of efficiently treating heavy metals and blue-green algae at the same time. [0004] In order to solve the above technical problems, the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/52C02F1/54C02F1/62C02F101/20
CPCC02F1/286C02F1/52C02F1/54C02F1/62C02F2001/007C02F2101/20
Inventor 陈元元魏晋
Owner JIANGHAN UNIVERSITY
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