Furan type water algaecide and algae removal application thereof in water treatment

A technology of algaecide and water body, which is applied in the field of environmental governance, can solve problems such as increasing the dosage of potassium permanganate, excessive manganese ions in the water body, and destroying the water ecological environment, etc., and achieves low ecological toxicity, wide applicability, and excellent The effect of algae removal effect

Active Publication Date: 2022-02-18
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the condition that the dosage of potassium permanganate is 0.25~0.5mg / L (algae liquid), the algae removal rate is only 20%~25%; When 0.5mg / L is added, the concentration of manganese ions in the water is close to the surface water environmental quality standard of 0.1mg / L. Continuing to increase the dosage of potassium permanganate will cause the manganese ions in the water to exceed the standard (Chen Sili et al., 2019, algicide emergency response Case analysis of lake cyanobacteria bloom control)
When the dosage of calcium hypochlorite is 50mg / L (algae liquid), rapid algae removal can be achieved, but there is residual toxicity in the water body, which will destroy the water ecological environment (Qian Yuanzhong, 2018, two algaecides are used in combination to control research on water blooms)

Method used

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  • Furan type water algaecide and algae removal application thereof in water treatment
  • Furan type water algaecide and algae removal application thereof in water treatment
  • Furan type water algaecide and algae removal application thereof in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5 and comparative example 1

[0063] In Examples 1 to 5 and Example 1-1, different types of algicides (the dosage of 2,5-diformylfuran is 50 mg / L) were added to the same diluted algae liquid A , the initial chlorophyll a concentration of algae liquid A is 41.4mg / m 3 , the initial pH value of algae solution A was 7.82, and the dominant species was Euglena. Comparative Example 1 is used as a control experiment, and is the same as Examples 1 to 5 except that no algaecide is added.

[0064] Table 1 shows the algae removal rate measured in a predetermined time period in Examples 1 to 5 and Comparative Example 1. It can be seen from Table 1 that when the dosage of 2,5-diformylfuran (DFF) is 50 mg / L, when the mass content of DFF in different algaecides accounts for 0.1-100%, all have good algae removal effect; Preferably, when the mass content of DFF in different algicides accounts for 1 to 100%, it has a better algae removal effect, and can reach an algae removal rate of more than 75% in a short period of time...

Embodiment 6 to 9

[0072] The pH environment of the water body suitable for the algaecide containing DFF is explored below. The pH value of the above-mentioned algae solution A is adjusted by using hydrochloric acid and sodium bicarbonate. Specifically, the diluted algae liquid A (initial chlorophyll a concentration of 41.4mg / m3) taken out from a lake in Ningbo 3 , pH value is 7.82) adjust the pH value of the algae solution to 4.0, 7.0, 9.0, 10.0 and 11.0 with hydrochloric acid and sodium bicarbonate respectively, then add algaecide to the algae solution, the dosage of DFF is 50mg / L.

[0073] Table 2 shows the algae removal rate measured in the predetermined time period in Example 6 to Example 9-2. As can be seen from Table 2, the pH value is in the range of 4.0 to 10.0 (Examples 6 to 9-1), and the algaecides containing DFF all have good algae removal effect, which can be achieved in a short period of time (for example, within 3 hours). More than 80% algae removal effect. However, when pH=11 ...

Embodiment 10 to 17

[0081] The following is to explore the appropriate dosage of algaecide containing DFF and the appropriate concentration of algae liquid in the water body (in terms of chlorophyll a concentration), and the dominant species is euglena.

[0082] Algae removal experiments were carried out by using filtered lake water to dilute the experimental algae liquid to have different chlorophyll a concentrations and adding different amounts of DFF.

[0083] The algae liquid taken from a certain lake in Ningbo was diluted with filtered lake water to different concentrations, the pH value was between 7.6 and 8.0, and different amounts of algicide were added to the algae liquid. Table 3 shows the algae removal rate, algae cell state, and chlorophyll color change, etc. measured at predetermined time periods in Examples 10 to 17-1. It can be seen from Table 3 that the concentration of chlorophyll a ≥ 5mg / m 3 When the dosage of DFF is 1-4000mg / L, it has a better algae removal effect, and when th...

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Abstract

The invention provides a furan type water algaecide, which is prepared from an active component 2, 5-diformyl furan. The invention further provides algae removal application of the algicide in water treatment. The algaecide has an excellent algae removal rate in a short time, and can maintain a high algae removal rate in a long time; besides, the algaecide is a bio-based algaecide, is low in ecological toxicity and environment-friendly in source, has relatively good inhibiting and killing effects on wild cyanobacteria, euglena and the like, and can be applied to treatment of cyanobacteria bloom, gallophyte bloom and bloom caused by other algae.

Description

technical field [0001] The application relates to a water body algaecide, which belongs to the field of environmental treatment; specifically, it relates to a furan bio-based algaecide and its application in the field of water body treatment. Background technique [0002] Eutrophication of water body is one of the most important water pollution problems facing the world today. As early as the beginning of the 20th century, the problem of eutrophication of lakes and reservoirs in European and American countries had become prominent, and the algal bloom disasters in important lakes such as Taihu Lake, Dianchi Lake, and Chaohu Lake in my country were also more prominent, and many reservoirs (such as the Three Gorges Reservoir), rivers, and landscape water bodies also frequently appeared different degrees of algal blooms. Algal toxins released by some algae seriously threaten aquatic systems and human health. How to effectively control algal blooms and avoid the explosive growt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
CPCC02F1/00C02F2303/20
Inventor 陆贻超张亚杰
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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