Temas Variados / Causas De La Contaminacion Del Agua
Causas De La Contaminacion Del AguaTrabajos Documentales: Causas De La Contaminacion Del Agua
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Enviado por: wendyrodmol 27 septiembre 2012
Palabras: 2529 | Páginas: 11
Sewage and Wastewater (aguas residuals )
Domestic households(hogares), industrial and agricultural practices produce wastewater that can cause pollution of many lakes and rivers.
• Sewage is the term used for wastewater that often contains feces(fisis), urine and laundry waste (residuos).
• There are billions of people on Earth, so treating sewage is a big priority.
• Sewage disposal (eliminacion de aguas residuals)is a major problem in developing countries as many people in these areas don’t have access to sanitary conditions and clean water.
• Untreated sewage water in such areas can contaminate the environment and cause diseases such as diarrhea.
• Sewage in developed countries is carried away from the home quickly and hygienically through sewage pipes. (a traves de tuberias de aguas residuales)
• Sewage is treated in water treatment plants and the waste is often disposed into the sea.
• Sewage is mainly biodegradable and most of it is broken down in the environment (se descompone en el medio ambiente).
• In developed countries, sewage often causes problems when people flush chemical and pharmaceutical substances down the toilet. When people are ill, sewage often carries harmful viruses and bacteria into the environment causing health problems.
Marine dumping (vertidos marinos)
Dumping of litter in the sea can cause huge problems. Litter items such as 6-pack ring packaging can get caught in marine animals and may result in death. Different items take different lengths of time (periodos de tiempos) to degrade in water:
• Cardboard – Takes 2 weeks to degrade.
• Newspaper – Takes 6 weeks to degrade.
• Photodegradable packaging – Takes 6 weeks to degrade.
• Foam – Takes 50 years to degrade.
• Styrofoam – Takes 80 years to degrade.
• Aluminum – Takes 200 years to degrade.
• Plastic packaging – Takes 400 years to degrade.
• Glass – It takes so long to degrade that we don’t know the exact time.
Industrial water and water poll
Industry is a huge source of water pollution, it produces pollutants (contaminantes) that are extremely harmful (prejudicial) to people and the environment.
• Many industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans.
• Pollutants from industrial sources include:
o Asbestos – This pollutant is a serious health hazard and carcinogenic. Asbestos fibres can be inhaled and cause illnesses such as asbestosis, mesothelioma, lung cancer, intestinal cancer and liver cancer.
o Lead – This is a metallic element and can cause health and environmental problems. It is a non-biodegradable substance so is hard to clean up once the environment is contaminated. Lead is harmful to the health of many animals, including humans, as it can inhibit the action of bodily enzymes.
o Mercury – This is a metallic element and can cause health and environmental problems. It is a non-biodegradable substance so is hard to clean up once the environm ...
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