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Questions Related to genetic modification and biotechnology

Heavy metals like nickel can be removed from water with the help of

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  1. Filtration

  2. Carbomethylchitosan

  3. Biological treatment

  4. Ultrafiltration

Show answer
Correct Option: A
Explanation:

The conventional methods which are commonly used for the removal of nickel from water are physico-chemical methods, such as chemical coagulation, chemical oxidation or reduction, active carbon adsorption, filtration, ion exchange and membrane technologies. Nickel behaves the same as iron, and can be removed by a strong acid cation exchanger. Activated-carbon filtration can be used to reduce the amount of nickel in drinking water, but may not remove it all. Reverse osmosis will remove 97 - 98% of the nickel from drinking water.

So, the correct answer is option A.