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Application of olivine to adsorption and removal of microcystis aeruginosa

A technology of Microcystis aeruginosa and olivine, applied in the direction of adsorbed water/sewage treatment, etc., can solve problems such as difficulty in evaluating the impact of benthic organisms, complex pretreatment, and affecting the respiration and feeding of aquatic organisms.

Inactive Publication Date: 2019-05-21
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some key problems in the use of clay for the removal of harmful algae, such as the large amount of clay and harmful algae aggregates settled at the bottom of the water will affect the respiration and feeding of aquatic organisms, and the clay modification process requires complex pretreatment and high cost, and the impact of adulterants in modified clays on benthic organisms is difficult to assess

Method used

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  • Application of olivine to adsorption and removal of microcystis aeruginosa
  • Application of olivine to adsorption and removal of microcystis aeruginosa
  • Application of olivine to adsorption and removal of microcystis aeruginosa

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Embodiment 1

[0023] Realize that the used reagent of technical scheme of the present invention and instrument are as follows:

[0024] Main experimental reagents: natural mineral samples are provided by Central South Institute of Metallurgical Geology and Yichang Institute of Geology and Mineral Resources (No. 502), and the particle size screened by the experiment is between 180-200 mesh.

[0025] Main experimental instruments: X-ray diffractometer (XRD, D / max2500, Rigaku, Japan); cold-field scanning electron microscope (SEM, JSM-7500F, JEOL, Japan); ultraviolet-visible spectrophotometer (UV-Vis DRS, Lambda25, USA); pH meter (Delta 320, Mettler-Toledo, Shanghai Co., Ltd.); Zeta potential analyzer (Malvern Zetasizer, 2000HSA, UK).

[0026] Characterization of olivine

[0027] The crystal form of natural olivine samples was determined by X-ray diffractometer, and the scanning 2θ range was 20°-60°; the morphology of natural olivine was determined by cold-field scanning electron microscopy. ...

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Abstract

The invention provides an application of olivine to adsorption and removal of microcystis aeruginosa. Specifically, the application comprises the following steps: under the conditions that a pH valueis 7-8, the temperature is 20-30 DEG C, and the illumination is 1500-2500 L, respectively and successively adding the microcystis aeruginosa and the olivine into a sterilized culture medium, putting in an illumination incubator for 0.5-3 hours and removing the microcystis aeruginosa. The density of the microcystis aeruginosa is 1.0*10<6> to 1.0*10<7> cells / mL; the microcystis aeruginosa comprisesalgae cells during the logarithmic growth period and the death period. In the technical scheme of the invention, the natural olivine mainly removes the microcystis aeruginosa under the action of adsorption, positive charges on the surfaces of natural minerals and negative charges on the surfaces of the algae cells cause the reduction in charges on the surfaces of the algae cells under the action of static electricity, and the cells lose the stability and form a suspended precipitate aggregate. The natural olivine adsorbs nutrient salt in the culture medium during the reaction to cause the nutrient depletion of the algae cells, thereby inhibiting the growth of the algae cells.

Description

technical field [0001] The invention provides a new application of natural olivine, specifically applying it to the adsorption of Microcystis aeruginosa, belonging to the technical field of water pollution control. Background technique [0002] Harmful algal blooms occur frequently in oceans, lakes, and reservoirs due to excess nutrients in the aquatic environment and global warming, seriously threatening aquatic ecosystems, fisheries, and human health. Of the harmful algal blooms, Microcystis aeruginosa is the most serious. [0003] To control the occurrence of harmful algal blooms, researchers have developed various algae removal technologies, such as adsorption, ultrasonic aggregation, froth flotation, filtration, and algicides. Among them, clay minerals have attracted extensive attention due to their advantages of low cost, high adsorption capacity, high cation exchange capacity, and high surface area. However, there are still some key problems in the use of clay for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 李瑞萍张彬任慧君黄应平
Owner CHINA THREE GORGES UNIV
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