Purification method of microplastics in pond culture seawater

A technology for microplastics and aquaculture water, applied in the field of environmental pollution research, can solve problems such as marine biological hazards, and achieve the effects of promoting adsorption and bridging, reducing the use and increasing the particle size of flocs

Active Publication Date: 2021-07-13
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microplastics that adsorb other toxic pollutants can be more harmful to marine life, which also poses great pressure and challenges to the marine environment

Method used

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  • Purification method of microplastics in pond culture seawater
  • Purification method of microplastics in pond culture seawater
  • Purification method of microplastics in pond culture seawater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. A preparation method of microbial flocculant, comprising the following steps:

[0036] The bacterial strain used is Bacillus licheniformis DHS-40, and the culture medium used includes:

[0037] LB solid medium: peptone 10.0g, yeast powder 5.0g, NaCl 10.0g, agar powder 1.5-2.0%, distilled water 1000mL, pH value 7.0, sterilized by high temperature steam at 121°C for 20min.

[0038] Expanded medium: soybean oil 0.49%, soybean meal hydrolyzate 5.0g / L, potassium dihydrogen phosphate 0.2g / L, calcium chloride solution (7.5g / L) 26μL / L, manganese sulfate solution (2.0g / L) 260μL / L, ferrous sulfate solution (2.0g / L) 100μL / L.

[0039]Inoculate Bacillus licheniformis into the liquid medium for expanded culture, collect the bacteria by centrifugation, wash the bacteria repeatedly with 10mM Tris.HCl (pH 8.0) solution and redissolve them to form a cell suspension. , to obtain cell crushing products; at 0-2°C, add ammonium sulfate solid powder to the cell crushing products to form...

Embodiment 2

[0046] When carrying out flocculation, no radhamone was added, and the rest were exactly the same as in Example 1.

Embodiment 3

[0048] No 4-hydroxy-3-methoxybenzyl alcohol was added during flocculation, and the rest was exactly the same as in Example 1.

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Abstract

The invention provides a method for purifying microplastics in pond cultured seawater, which belongs to the technical field of environmental pollution research, comprising rapidly stirring the cultured water body at 200-300 r / min for 5-6 minutes, adding aluminum salt coagulant and 4-hydroxy-3-formazan to the water Oxybenzyl alcohol, stirring slowly at 100-120r / min for 3-5min, adding microbial flocculant to the water, continuing to stir slowly for 6-8min, standing for 20-30min, solid-liquid separation, the aluminum salt coagulant used is PAC. The method for purifying microplastics in pond cultured seawater can increase the collision probability between PAC and colloidal particles, improve the effect of electrical neutralization, promote the stretching of the molecular chain of microbial flocculants, accelerate the growth of flocs, and increase the particle size of flocs. It makes the floc structure more compact and enhances the strength of the floc, thereby improving the purification effect of microplastics.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution research, and in particular relates to a method for purifying seawater microplastics in pond culture. Background technique [0002] At present, human society has entered the "plastic age". The production and use of a large number of plastic products has led to a large amount of plastic waste entering the environment, spreading on land, lakes, coastlines, ocean surfaces, seabeds and even abysses. Plastic is difficult to degrade and may become one of the important markers in the human era of the earth. In the marine environment, plastic has been widely distributed around the world due to its low density, high buoyancy and strong persistence. About 80% of marine solid waste is plastic waste. At present, more than 100 million tons of plastic waste are buried in landfills around the world every year, and another 150 million tons enter the land and marine environment. According to rep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/20
CPCC02F1/5236C02F1/54C02F3/34C02F2103/20
Inventor 谭朋徐冬冬陈睿毅王立改
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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