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Method for efficiently cleaning fluorine-containing micro-plastics in water body by using spirulina

A technology of spirulina and microplastics, which is applied in the field of chemistry, can solve the problems of spirulina flooding, etc., and achieve the effects of reducing environmental pollution, reducing production costs, and saving production costs

Active Publication Date: 2022-01-18
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an environment-friendly cleaning method for fluorine-containing microplastics in water bodies, which can not only effectively solve the problem of flooding of spirulina caused by eutrophication of water bodies, but also achieve a removal rate of 95.00% of fluorine-containing polymer microplastics in the process of coagulation wt% above

Method used

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  • Method for efficiently cleaning fluorine-containing micro-plastics in water body by using spirulina
  • Method for efficiently cleaning fluorine-containing micro-plastics in water body by using spirulina
  • Method for efficiently cleaning fluorine-containing micro-plastics in water body by using spirulina

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) First disperse 5.00g of spirulina evenly in 44.90g of aqueous solution;

[0032] 2) Add 0.10 g of cetyltrimethylammonium bromide (CTAB) to 5.00 g of spirulina dispersion solution, stir for 2 hours, and let stand for 2 hours;

[0033] 3) Centrifuge the dispersion liquid after standing to obtain C-spirulina material. Then add deionized water to configure 100.00g of C-spirulina material dispersion;

[0034] 4) Fully mix 1.00wt% formic acid solution (50.00g) with water-based 33wt% PTFE / PSAN emulsion (50.00g) in a beaker, and the pH value of the acidified PTFE / PSAN emulsion is 2.98;

[0035] 5) Raise the temperature of the entire system to between 10°C and 100°C, turn on the stirring device, and control the magnetic stirring speed between 50rpm and 1000rpm to make the temperature of the entire system uniform;

[0036] 6) Then the C-spirulina material dispersion liquid of 100.00g is added in the beaker that the mixed solution of formic acid and PTFE / PSAN is housed;

[003...

Embodiment 2

[0043] 1) First disperse 5.00g of spirulina evenly in 44.50g of aqueous solution;

[0044] 2) Add 0.10 g of tetradecyltrimethylammonium bromide (TTAB) to 5.00 g of spirulina dispersion solution, stir for 2 h, and let stand for 2 h;

[0045] 3) Centrifuge the dispersion liquid after standing to obtain T-spirulina material. Then add deionized water to configure 100.00g of T-spirulina material dispersion;

[0046] 4) Fully mix 2.00wt% formic acid solution (50.00g) with water-based 33wt% PTFE / PSAN emulsion (50.00g) in a beaker, and the pH value of the acidified PTFE / PSAN emulsion is 1.38;

[0047] 5) Raise the temperature of the entire system to between 10°C and 100°C, turn on the stirring device, and control the magnetic stirring speed between 50rpm and 1000rpm to make the temperature of the entire system uniform;

[0048] 6) Then the T-spirulina material dispersion of 100.00g is added in the beaker that the mixed solution of formic acid and PTFE / PSAN is housed;

[0049] 7) if...

Embodiment 3

[0055] 1) First disperse 5.00g of spirulina evenly in 44.00g of aqueous solution;

[0056] 2) Add 0.15 g of octadecyltrimethylammonium bromide (STAB) to 5.00 g of the spirulina dispersion solution, stir for 2 h, and let stand for 2 h;

[0057] 3) Centrifuge the dispersion liquid after standing to obtain S-spirulina material. Then add deionized water to configure 100.00g of S-spirulina material dispersion;

[0058] 4) Fully mix 2.00wt% formic acid solution (50.00g) with water-based 33wt% PTFE / PSAN emulsion (50.00g) in a beaker, and the pH value of the acidified PTFE / PSAN emulsion is 1.12;

[0059] 5) Raise the temperature of the entire system to between 10°C and 100°C, turn on the stirring device, and control the magnetic stirring speed between 50rpm and 1000rpm to make the temperature of the entire system uniform;

[0060] 6) Then the T-spirulina material dispersion of 100.00g is added in the beaker that the mixed solution of formic acid and PTFE / PSAN is housed;

[0061] 7)...

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Abstract

The invention relates to a method for efficiently cleaning fluorine-containing micro-plastics in a water body by using spirulina. The characteristics of large specific surface area, capability of carrying a large number of active groups and the like of spirulina can be utilized to efficiently clean micro-plastic pollution in water bodies such as oceans, lakes and the like. According to the method, the surface of spirulina is modified through a trace cationic surfactant; the surface-modified spirulina is added into a fluorine-containing micro-plastic water body under an acidic condition, a co-coagulation reaction is carried out;the demulsification trend is judged according to a zeta potential value, the zeta potential value of the whole system is made to range from -30mv to +30mv; in the co-coagulation process, the stirring speed is controlled between 50 rpm and 1000 rpm, and the reaction temperature is controlled between 10 DEG C and 100 DEG C; and the surface-modified spirulina can efficiently clean high-dispersity fluorine-containing micro-plastic particles in the water body, and the removal rate reaches 95.00 wt% or above.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and more specifically relates to an efficient cleaning method for marine microplastic pollution and microplastic particles in enterprise wastewater. Background technique [0002] Because microplastics have the characteristics of small particle size and stable chemical properties, they are difficult to clean up in water bodies and difficult to decompose themselves, which is increasingly harmful to aquatic organisms and the entire ecosystem. For example, modified fluoropolymer emulsions are widely used in microelectronics and aerospace industries; however, due to their nanoscale particle size and good dispersion, they are difficult to collect completely. In southern Jiangsu, there are a large number of chemical fiber, cosmetics, and paint companies. Wastewater from industrial production will inevitably contain a large amount of fluorine-containing microplastic residues, which will cause potential...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/322
Inventor 蔡志豪郑高达张石愚刘国秋杨玉琴谢生伟叶辉俞子奕秦铮潘清澈
Owner CHANGSHU INSTITUTE OF TECHNOLOGY