JPH0366603A - Controlling method of red tide plankton using surfactant - Google Patents

Abstract

PURPOSE:To effectively control red tide plankton by scattering 6- sulfochinopopiranocyl glycerol of palmitic acid in a component of sea lettuce or mixture of said component and sodium salt of alkyl ether sulfate into sea area generating red tide. CONSTITUTION:A surfactant as a principal ingredient of sea lettuce extract, namely 6-sulfochinopopiranocyl glycerol of palmitic acid as a component of holey sea lettuce or a mixture of said glycerol and sodium salt of alkyl ether sulfate is scattered into sea area generating red tide to control red tide plankton. Said surfactant has excellent destroying property to cell of red tide plankton exhibiting harmless property to fishes and quick decomposition by microorganism in natural environment, thus said method ts sufficiently economical.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to the extermination of red tide plankton, and more specifically, the inventor of the present invention has previously filed an application for a method for suppressing the proliferation of red tide plankton using ingredients from Ulva. However, among these, 6-sulfoquinovoviranone glycerol, a form of valmitic acid, has an excellent ability to destroy red tide plankton cells, is harmless to fish, and is quickly decomposed by microorganisms in the natural world, so it has been found that it can be sprayed in areas where red tide occurs. Ta.

(Prior art and problems to be solved by the invention) Conventional techniques for preventing red tide cannot use methods that may harm fish, shellfish, and other useful blanks, so the use of chemicals is almost unnecessary. It was possible. Oxidation and ozone oxidation were also ineffective in seawater. Ulva extract and Mozuku extract are non-toxic red tide repellents, but there are problems in securing the necessary amounts. In the present invention, the main component of Ulva extract had a surfactant structure, so when we experimented with surfactants, fatty acid esters (IJum and sugar fatty acid esters) had no effect, but most other surfactants destroyed red tide plankton cells. Among them, alkyl ether sulfate ester sodium salt has a concentration of 5 PPM.
It was found that 1.00% of Heterosigma and Chanotonella cells were destroyed within 10 minutes at a concentration of .

(Means for solving the problem) Water-soluble crystals containing 6-sulfoquinobobylanosylglycerol of valmitic acid as a main component, which is obtained by separating the methanol extract of Yapregusa, Ulva, and Ulva of the Ulva family using an anion exchange resin. When used in combination with alkyl ether sulfate sodium salt, it was economical and decomposed quickly in nature, so it was possible to destroy red tide plankton cells without affecting fish. If it is okay to get rid of red tide only in a place where there is no risk of impact on the environment, sodium laurylbenzenesulfonate can be used at 50 P.
At PM concentration, polyoxyethylene/alkyl ether 75
: 75 ppy The effect was sufficient.

Next, examples will be described.

A destructive test of red tide plankton was conducted in a solution prepared by stirring an equal amount of 5 PPM aqueous solution. As a result, the plankton whose cells were destroyed within 10 minutes were Gymnodinium, Prolocentrum, Rhapid ring Chattonella antica, Chattonella marina, and Hetea7ma.

Example 1゜

Claims (1)

[Claims] A method of exterminating red tide plankton by mixing 6-sulfoquinovopyranosylglycerol of palmitic acid, which is a component of Ulva, or alkyl ether sulfate sodium salt and spraying it in areas where red tide occurs.