tailieunhanh - SOIL POLLUTION

The Modular Wetlands device to be tested is located in a non typical situation. Unlike a storm event that typically contains higher concentration during the first 2 hours our site has a fairly consistent flow of wash water that is estimated to be consistent through out the day. For this reason, composite samples were taken over a two hour period. The intent of the sampling was to establish a composite pollutant sample. This was done by dividing all of the containers and bottles to be filled for testing into ten equal parts. The grab sample was taken. | SOIL POLLUTION Definition Soil pollution is defined as the build-up in soils of persistent toxic compounds chemicals salts radioactive materials or disease causing agents which have adverse effects on plant growth and animal health. Soil is the thin layer of organic and inorganic materials that covers the Earth s rocky surface. The organic portion which is derived from the decayed remains of plants and animals is concentrated in the dark uppermost topsoil. The inorganic portion made up of rock fragments was formed over thousands of years by physical and chemical weathering of bedrock. Productive soils are necessary for agriculture to supply the world with sufficient food. There are many different ways that soil can become polluted such as Seepage from a landfill Discharge of industrial waste into the soil Percolation of contaminated water into the soil Rupture of underground storage tanks Excess application of pesticides herbicides or fertilizer Solid waste seepage The most common chemicals involved in causing soil pollution are Petroleum hydrocarbons Heavy metals Pesticides Solvents Types of Soil Pollution Agricultural Soil Pollution i pollution of surface soil ii pollution of underground soil Soil pollution by industrial effluents and solid wastes i pollution of surface soil ii disturbances in soil profile Pollution due to urban activities i pollution of surface soil ii pollution of underground soil Causes of Soil Pollution Soil pollution is caused by the presence of man-made chemicals or other alteration in the natural soil environment. This type of contamination typically arises from the rupture of underground storage links application of pesticides percolation of contaminated surface water to subsurface strata oil and fuel dumping leaching of wastes from landfills or direct discharge of industrial wastes to the soil. The most common chemicals involved are petroleum hydrocarbons solvents pesticides lead and other heavy metals. This occurrence of this phenomenon

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• Overview and Innovation
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• Temperature Storage
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• Vitrification
• Canadian Experience
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