Method of utilizing microalgae to treat excessive copper in seawater

A seawater and microalgae technology, applied in the field of water treatment, can solve the problems of low specificity and achieve the effects of strong specific adsorption, low treatment cost, and improved removal efficiency

Active Publication Date: 2017-11-21
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the low specificity of selecting algae to deal with heavy metals in the prior art, the object of the present invention is to provide a method for treating excessive copper in seawater with microalgae, which has higher selective adsorption for excess copper in seawater, Good removal effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for utilizing microalgae to treat excess copper in seawater, putting Prorocentrum donghaiense into seawater containing excess copper to reduce the copper content, comprising the following steps:

[0035] (1) Cultivate algae species: Cultivate algae species in SE culture medium at 22°C, the light-dark cycle is 12h light, 12h shading, the light intensity is 3000lux, the culture medium is shaken twice a day, separated and concentrated after 2 days of cultivation to obtain a density of 10 5 pieces / mL of suspended algae liquid;

[0036] (2) Adsorption: Introduce seawater with a copper content of 50 μg / L into the treatment pool, and then put in the suspended algae solution for 4 days, and the amount of input is 1L of the suspended algae solution / m 3 For seawater, continuously feed air into the seawater to ensure an oxygen concentration of 7.9mg / L.

[0037] During the cultivation process, the copper content gradually decreased, and after 4 days, the copper concentra...

Embodiment 2

[0039]A method for utilizing microalgae to treat excess copper in seawater, putting Prorocentrum donghaiense into seawater containing excess copper to reduce the copper content, comprising the following steps:

[0040] (1) Cultivate algae species: Cultivate algae species in SE culture medium at 22°C, the light-dark cycle is 12h light, 12h shading, the light intensity is 3000lux, the culture medium is shaken twice a day, separated and concentrated after 2 days of cultivation to obtain a density of 10 5 pieces / mL of suspended algae liquid;

[0041] (2) Adsorption: Introduce seawater with a copper content of 100 μg / L into the treatment pool, and then put in the suspended algae solution for 4 days for cultivation, and the amount of input is 1L of the suspended algae solution / m 3 For seawater, continuously feed air into the seawater to ensure an oxygen concentration of 12.3mg / L.

[0042] During the cultivation process, the copper content gradually decreased, and after 4 days, the ...

Embodiment 3

[0044] A method of using microalgae to treat excess copper in seawater, immobilizing Prorocentrum donghaiense to make algae balls, and then putting them into seawater with a copper content of 50 μg / L to reduce the copper content, comprising the following steps:

[0045] (1) Cultivate algae species: Cultivate algae species in SE culture medium at 22°C, shake twice a day, light intensity is 3000lux, light-dark cycle is 12h light and shading 12h, separate and concentrate after 2 days of cultivation to obtain a density of 10 5 pieces / mL of suspended algae liquid;

[0046] (2) Preparing algal balls: immobilizing the cultivated Prorocentrum donghaiense to make algal balls coated with Prorocentrum donghaiense;

[0047] (3) Adsorption: Introduce copper-containing seawater into the treatment pool and put in algae balls, the amount of which is 2kg of algae balls / m 3 Seawater, continue to pass air into the treatment tank to make the oxygen concentration reach 7.9mg / L, after 4 days of cu...

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Abstract

The invention belongs to the technical field of water treatment, and particularly discloses a method of utilizing microalgae to treat excessive copper in seawater. The method includes: making East China Sea prorocentrum or stationary East China Sea prorocentrum into algal balls; putting the algal balls into the seawater containing excessive copper to lower content of the copper, wherein the algal balls are prepared by heating polyvinyl alcohol and bisphenol A epoxy resin in water for dissolution, adding sodium alginate solution, mixing well to obtain carrier liquid, dropwise adding feed liquid into Ca2+ containing crosslinking liquid for solidification forming and soaking formed algal balls in EDTA disodium solution for perforation. The East China Sea prorocentrum is utilized to treat the copper in the seawater, so that exclusive adsorptivity to copper is high, removal efficiency is high, and treatment cost is low; by using the East China Sea prorocentrum after being made into the algal balls, the removal efficiency can be improved, convenience is brought to recycling, and the algal balls are high in mechanical strength, high in resistance to swelling and reusable.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for using microalgae to treat excess copper in seawater. Background technique [0002] With the rapid economic development of coastal cities, a large amount of industrial and agricultural wastewater is discharged into the ocean, bringing a large amount of nitrogen, phosphorus, organic matter and heavy metal pollutants, leading to the gradual increase of heavy metal pollution in coastal waters. According to the "2016 Marine Environmental Quality Bulletin", among the pollutants discharged into the sea by rivers in my country in 2016, 14,000 tons of heavy metals were included, including 2,413 tons of copper, 575 tons of lead, 10,535 tons of zinc, 83 tons of cadmium, and 3 tons of mercury. cause great harm. At present, there are mainly physical remediation methods and chemical remediation methods to deal with heavy metal pollutants in seawater. Physical remediation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C12N11/10C12N11/08C12N11/04C02F103/08C12R1/89
CPCC02F3/322C02F2103/08C12N11/04C12N11/08C12N11/10
Inventor 李铁军杨承虎胡红美张玉荣尤炬炬钟志
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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