The present invention relates to a method which destroys cells with anions attracted by cations by increasing access to algae by applying amphiprotic fine particles formed by applying hydrophobic properties to oxidized soils into the air and performs coagulative precipitation. A red clay suspension is less effective for the amount used since the red clay suspension has little chance of a reaction with algae by fast sedimentation when red and green tide phenomenon is generated by rapid propagation of algae and is able to be a secondary pollution source. The present invention pulverizes oxidized soils such as red clay or kaolin, dips the pulverized soils into an acidic solution, performing neutralization and washing, filters fine particles by irradiating ultrasonic waves to the suspension in order to manufacture the fine particles, inserts precipitation dried powders into a heating sot, gives hydrophobic properties by meting and mixing surfactants having insulators such as paraffin or surfactants with cations to an organic solvent such s ether, separates the organic solvent from bound water by irradiating high frequency and performing decompression, performs sealing by performing cooling and performs spraying to an algae outbreak region such as red tide and green tide. The present invention reduces lump generation in storage, is able to widely and rapidly performing spraying into the air, is able to reduce flying to a remote space, increases residence time in water and surface of the water, continuously destroys algae by anions according to positive charge change, is able to reduce algae such as red tide or greed tide by a small amount by repeated sedimentation with the suspension and is able to reduce secondary pollution by being decomposed after sedimentation.COPYRIGHT KIPO 2015산화된 흙에 소수성을 부가한 양쪽성 미립자로 공중살포하여 조류와 접촉기회를 높여 + 전하에 끌린 - 이온으로 세포를 파괴하고, 응집 침전시키는 방법이다.조류가 다량 번식하여 적조와 녹조현상이 발생하면 황토를 물에 풀어서 황토 현탁액을 만들어 물속에 뿌리면 대부분 빨리 침전하여 조류와 반응할 기회가 적어서 사용량에 비해 효과가 작고 2차 오염
