segunda-feira, 17 de janeiro de 2011

Types of pollutants and sources of water pollution

Water Pollutants:

Natural causes: rainwater runs under and through the soils, dissolving soluble chemical substances and becoming easier the contact between reactive substances (for example: acids) and minerals of soils and rocks. Besides, it removes products of reactions that occurred in soil.

  • Decomposition of animals and aquatic plants;   

  • Acid rains;  

  • Surface water that have solids from sand to colloidal particles.

Human causes:

  • Municipal and industrial discharges which have chlorides, ammonia, etc.;

  • Floating garbage and foams; 

  • Drainages from gases emitted by industries.

Sources of pollution: 

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