Question

Process of purification of natural water

Answer 1

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Nature has adapted to pollution and stresses in the environment which have influenced the evolution of the natural water purification process. Both natural and man-made impacts can affect water quality. In order to survive, mechanisms for cleaning water are necessary to remove impurities and make the water safe for all organisms. According to the U. S. Geological Survey, about 63 percent of the public water supply comes from surface water sources like lakes and streams. Natural water purification, therefore, has a direct impact on humans.

Benefits

Wetlands act as nature's water filters. The Ecological Society of America estimates that they can remove up to 60 percent of the metals in water and up to 90 percent of the sediment from urban and agricultural runoff. Metals such as mercury and lead can have serious human health effects; their removal is imperative to good water quality. Removal of sediment helps prevent sedimentation in lakes and streams. It will also help prevent cloudiness which can negatively affect micro-organisms and aquatic plant life.

Function

Wetlands naturally filter water by slowing its flow. Suspended particles, metals and other impurities drop into the sediment layer of wetlands. Over time, they become sequestered from the environment as additional layers of sediment cover them. Bacteria in plants and within wetland soils decompose organic

Answer 2

Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids and gases from water. The goal is to produce water fit for a specific purpose.