Applications of colloids in sewage disposal
Answers
Explanation:
Sewage Precipitation:
Sewage Precipitation:On applying an electric field, colloidal particles are attracted towards oppositely charged electrodes. As their charge gets neutralised, they settle as a precipitate. The precipitated or coagulated matter called sludge is used as manure while clear water is used for irrigation.
Answer:
Colloids play a very significant role in nature and in our daily life. Some of the important applications of colloids are discussed below:
1)Medicines:
Medicines in colloidal form are easily adsorbed by the body tissues and hence are more effective.
2)Sewage disposal:
Colloidal particles of the dirt, mud etc. carry electric charge, hence when sewage water is passed through the plates kept at a high potential, the colloidal particles are coagulated due to electrophoresis and the suspended matter gets removed.
3)Purification of water:
The precipitation of colloidal impurities present in water can be done by adding certain electrolytes like alum etc. the negatively charged colloidal particles of impurities get neutralized by the Al3+ ions and settle down and pure water can be decanted off.
3)Cleansing action of soap:
Soap solution is colloidal in nature. It removes the dirt particles either by adsorption or by emulsifying the greasy matter sticking to the cloth.
5) Smoke precipitation:
Smoke is also a colloidal system which mainly consists of charged particles of carbon depressed in air.
Explanation:
Hope this may help you.....