A kind of red tide algae algaecide based on natural polyphenol modified nanocellulose and its application

A nanocellulose, algae and algaecide technology, applied in herbicides and algicides, applications, chemicals for biological control, etc. problems, to achieve the effects of low algae removal efficiency, good biocompatibility and short effective time.

Active Publication Date: 2021-11-19
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a red tide algaecide based on natural polyphenol modified nano-cellulose and its application in red tide control, to effectively solve the problem of poor biocompatibility, slow effect and easy Rebound and easy to cause secondary environmental pollution

Method used

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  • A kind of red tide algae algaecide based on natural polyphenol modified nanocellulose and its application
  • A kind of red tide algae algaecide based on natural polyphenol modified nanocellulose and its application
  • A kind of red tide algae algaecide based on natural polyphenol modified nanocellulose and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Experiment 1: Mix cellulose nanocrystals with a mass content of 19%, 78% quercetin, 1% polyethylene glycol, and 2% sodium chloride in 1L seawater, and ultrasonically modify them in a 200w ultrasonic device. 15min, as algaecide solution 1;

[0034] Control 2: Mix quercetin with a mass content of 78%, 1% polyethylene glycol, and 2% sodium chloride in 1L seawater, and ultrasonically modify it in a 200w ultrasonic device for 15 minutes, as an algaecide solution 2;

[0035]Control 3: Mix cellulose nanocrystals with a mass content of 19%, 1% polyethylene glycol, and 2% sodium chloride in 1L seawater, and ultrasonically modify them in a 200w ultrasonic device for 15 minutes as an algaecide Solution 3;

[0036] Blank 4: Mix 1% polyethylene glycol and 2% sodium chloride in 1L seawater evenly, and ultrasonically modify it in a 200w ultrasonic device for 15 minutes, as algaecide solution 4.

[0037] Get 4 parts of the red tide water body with Phaeocystis globosa growing, each 9...

Embodiment 2

[0040] Mix positively charged cellulose nanocrystals with a mass content of 25%, 70% quercetin, 2% carrageenan, and 3% sodium sulfate in 1L seawater, and ultrasonically modify them in a 200w ultrasonic device for 15 minutes , to obtain red tide algae algicide solution.

[0041] Get 6 parts of the red tide water body that grows Heterocurvium akashiwo, each 9L, spray the above-mentioned red tide algae algaecide solution to it respectively, the initial concentration biodensity of Heterocurvium akashiwo in the algae liquid is 10 8 cells L -1 , so that the concentration of red tide algae algaecide in the algae liquid is 0, 0.03g L -1 , 0.06g L -1 , 0.09g L -1 , 0.12g L -1 , 0.15g L -1 , After standing for 6 hours, observe the change of the density of H. akashiwo in the algae liquid. The algae removal efficiency of different concentrations of algicide is as follows: image 3 shown.

[0042] The results showed that when the red tide algaecide concentration of 0.09g L -1 and ...

Embodiment 3

[0044] Mix carboxylated modified cellulose nanocrystals with a mass content of 35%, 59% quercetin, 2% alginic acid, and 4% sodium gluconate in 1L seawater, and ultrasonically modify them in a 200w ultrasonic device 15min, red tide algaecide solution.

[0045] Get the red tide water body 9L that grows Prorocentrum donghaiense, spray above-mentioned red tide algae algaecide solution wherein, the initial concentration biodensity of algae liquid Prorocentrum donghaiense is 10 7 cells L -1 , the concentrations of red tide algae algaecide in the algae liquid are 0, 0.02g L -1 , 0.04g L -1 , 0.06g L -1 , 0.08g L -1 , 0.1g L -1 , After standing for 7 hours, observe the change of density of P.

[0046] The algae removal efficiency of different algicides is as follows: Figure 4 As shown, the results show that when the red tide algaecide concentration of 0.06g L -1 and above, for mob densities up to 10 7 cells L -1 The removal rate of Prorocentrum donghaiense can reach more th...

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Abstract

The invention discloses a red tide algae algaecide based on nanocellulose and natural polyphenols, which is uniformly mixed with the following components: nanocellulose 18-65%, natural polyphenols 29-78%, dispersant 1 -3%, auxiliary material 1-5%, wherein: the natural polyphenol is quercetin or tannic acid; the dispersant is carrageenan, gelatin, alginic acid, hydroxypropyl cellulose, dodecyl sulfonate One or more of sodium chloride, polyethylene glycol, polypropylene glycol, and alkyl monoglycosides; the auxiliary materials are sodium chloride, sodium nitrate, sodium sulfate, sodium gluconate, potassium chloride, potassium nitrate, and potassium sulfate one or more of them. The red tide algae removal agent is green, efficient and sustainable. When used, the red tide algae removal agent is mixed with seawater or fresh water to prepare a solution and sprayed on the surface of the red tide water body. After natural settlement, it can effectively remove the red tide and significantly improve Red tide water treatment efficiency, effectively reducing the impact of algicides on the water environment and organisms.

Description

technical field [0001] The invention relates to a seawater red tide pollution treatment method, in particular to the application of a red tide algaecide based on natural polyphenol-modified nano-cellulose in marine red tide control. Background technique [0002] Red tide is an ecological abnormal phenomenon in which some microalgae, protozoa or bacteria explosively proliferate or accumulate to a certain level under certain environmental conditions, causing discoloration of water bodies or causing harm to other organisms in the ocean. In marine systems, microalgae not only provide food for other aquatic organisms at the bottom of the food chain, but also play an important role in the global carbon cycle. They absorb atmospheric carbon dioxide through photosynthesis, thereby sequestering carbon. However, under certain conditions, certain species can proliferate explosively and gather or produce toxins to form harmful algal blooms. Because such algal blooms usually cause the wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/16A01P13/00C02F1/54C02F1/56
CPCA01N43/16C02F1/54C02F1/547C02F1/56C02F2103/007C02F2303/20
Inventor 苏荣欣丁国杰车明达黄仁亮
Owner TIANJIN UNIV
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