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The initial success of a new ecological approach to control algae toxins
At present, the eutrophication of various water bodies in China is becoming increasingly serious. Algae grow wild in the water, and algae toxins produced by algae occasionally cause poisoning and even death of humans and animals. The study also found that the same purity of microcystin toxicity even compared with the cobra toxicity. Algae toxins not only have neurotoxicity, damage the kidneys, affect the fetus, but also cause serious damage to the liver, which is one of the carcinogenic and cancer-promoting factors of liver cancer. Studies have shown that algae toxins are heat-resistant and are not easily damaged by tap water condensation, sedimentation, filtration, etc. China has tried to use chlorination, ozone and other means to control algal overgrowth. However, not only is the cost prohibitive, but it can only be applied to small areas. The Institute of Preventive Medicine at Fudan University in Shanghai and Japan's KTE Corporation have collaborated to try to control algae toxins with a new "covered algae control" method. The principle is to reduce the growth of algae cells by reducing the local water temperature and accelerating the local water flow by covering the surface of the water, reducing photosynthesis. Since May of last year, researchers have selected two ponds with physical characteristics such as water source and geographical location in a village in Qingpu District of Shanghai to conduct tests. It has been found that the number of algae cells, water quality transparency, and chlorophyll-A in fish ponds have improved significantly. . In the past, the dark green pond water has become clear and blue. To further determine the concentration of algae toxins in water, the researchers collaborated with the Zhejiang Provincial Center for Disease Control and Prevention to use liquid/mass spectrometry/mass spectrometry and enzyme-linked immunosorbent assays to determine the distribution and quantity of algae toxins in water, and to discover fish coverage. Pond algae toxins are significantly lower than uncovered ponds. Studies have shown that in order to achieve the desired effect of algae control, the algae cells should be covered in the early stage of growth, covering an area of ​​about one-third of the surface of the water, covered materials are opaque, impervious, not aging, durable plastic As well. Professor Yu Shunzhang of the Institute of Preventive Medicine at Fudan University stated that although the effectiveness of the method for controlling algal toxins has been initially confirmed, it is still necessary to further promote the localization of covered materials and continue to control the control of algae and toxins in flowing water bodies. the study.