Electrodialysis, Biology

This method is used for the desalination of water i.e., for the removal of dissolved mineral salts, acids, alkalis and also the radioactive substances from the effluents. Electro dialysis is performed in a multi-chamber membrane apparatus, known as electrodialyser, under the influence of electric current.

An electrodialyser is divided by alternating cation exchange and anion exchange membranes into concentrating and desalinating chambers.

These members have fixed charge-negative or positive-whereby they become impermeable to either anions or cations. Under the influence of electric field the cations motion to the cathode penetrate through the cation exchange membranes and retained by anion exchange membranes while the anions moving to the cation exchahge membranes and are retained by cation exchange resins . As a result, the ions of both the charges are removed from one row or chamber and desalinated water from the other.

This technique is useful for the production of fresh water on arid-coastal regions.  In Japan, electrodialysis eg sea-water is the principal source of salt.

 

 

Posted Date: 7/11/2012 8:46:13 AM | Location : United States







Related Discussions:- Electrodialysis, Assignment Help, Ask Question on Electrodialysis, Get Answer, Expert's Help, Electrodialysis Discussions

Write discussion on Electrodialysis
Your posts are moderated
Related Questions
Which of the following does not (or did) not lay an amniotic egg? A) Birds B) Monotreme Mammals C) Dinosaurs D) Frogs E) Snakes

What is the relationship between the concept of reproductive isolation and the concept of species? The Reproductive isolation is an important concept because it defines the con

Social Determinants of Health - Unemployment That unemployment gives rise to social insecurity and psychological stress is well recognised. Fears and uncertainties are known t

The fusion of two individuals with each acting as a gamete is known as

What are the principal sources of excessive nitrate and phosphate in rivers and lakes?

What problem would most likely to occur if a haploid cell attempted to perform meiosis? The cell could not replicate its DNA prior to meiosis.The cell could not pair homologous

Ventilation of Tracheal System - Diffusion Gaseous exchange due to diffusion generally takes care of the oxygen needs of most small insects. Similarly fairly large but inactiv

DIGESTION OF FOOD MATERIALS Digestion, you know, involves  the mixing of  food, its movement through the digestive tract and chemical breakdown of the large ntolecules of  food

How much Minerals should be taken for management of obesity? A diet high in sodium may promote retention of fluid in the body. Moderate restriction in the use of common/table s

Maintenance and Regulation of Peripheral Circulation Pressure receptors (baroreceptors) located in the wall of the internal carotid arteries and in the arch of aorta, when