水体富营养化 英文.docx

Interesting chemical reaction in Water pollution
---- Eutrophication
The water eutrophication is water contains too much solubility nutrient salts (mainly NH3 - N, NO3 -- N, NO2 - N and PO4 - P), make water algae phytoplankton growth such as a large number of breeding, and cause heterotrophic anisms strong metabolic activity of dissolved in water, make water metamorphism, and destroy the ecological balance of water phenomenon
cause of eutrophication
The water eutrophication can be divided into natural eutrophication and cultural eutrophication. Natural lakes have a from oligotrophic to eutrophic development process, from oligotrophic transition to rich nutrition, and to develop into the swamp, until death, lake natural law of development, this is a long historical process, but human activity will greatly accelerate the process.
2. The harm of water eutrophication
The water eutrophication of the main following features:
(1) Funded by reduction, water in the blue green algae and green algae multiply, plankton individual number huge increase;
(2) Due to the plankton, a big increase in the number of bacteria in the water to a large increase of suspended solids, transparency reduced;
(3) Produce a peculiar smell anic substance;
(4) Death algae residues position release make water to maintain higher TN, TP, Water pH value rise
(5) The water of oxygen balance is dest