Hazards of water pollution to aquatic organisms:
There are a variety of aquatic animals and plants in the water. The exchange of complex matter and energy between organisms and water, between organisms and living things, maintains a dynamic balance in quantity. But under the influence of human activities, this balance has been destroyed. When humans discharge pollutants into the water, some beneficial aquatic organisms will be poisoned and die, while some pollution-resistant aquatic organisms will intensify reproduction, consume a lot of oxygen dissolved in the water, and make beneficial aquatic organisms forced to move to him due to lack of oxygen. At or died. In particular, some toxic elements are difficult to dissolve in water and easily accumulate in living organisms, causing great harm to humans. For example, the content of mercury in water is very low, but the content in mercury is high, and the content in fish is surprisingly high. Assuming that the concentration of mercury in the water is 1, the concentration of mercury in the benthic organisms (referred to as small organisms living in the sediment of the water) in aquatic organisms is 700, while the concentration of mercury in the fish is as high as 860. It can be seen that when the water body is polluted, on the one hand, the balance between living things and water, living things and living things is destroyed. On the other hand, some toxic substances are continuously transferred and enriched, and finally endangering human health and life.
The impact of water pollution on industrial and agricultural production:
Industrial and agricultural production not only requires sufficient water, but also has certain requirements for water quality. Otherwise, it will cause great losses to industry and agriculture. Especially after the use of polluted water in industrial and agricultural production, it is extremely harmful to human beings. First, the industrial equipment was damaged, which seriously affected the quality of the products. The second is to change the chemical composition of the soil and reduce the fertility, resulting in reduced crop yield and serious pollution. The third is to increase the sewage treatment costs of domestic and industrial water in cities.