Electrodialysis, Biology

Assignment Help:

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.

 

 


Related Discussions:- Electrodialysis

Medication for cardiac patients, Medication The patient is advised to ...

Medication The patient is advised to continue antibiotics for a week more after discharge. Other medications prescribed are analgesics (acetaminopen), cough syrup, diuretics

Define changing body composition - age related functional, Define Changing ...

Define Changing Body Composition and Techniques for Measuring Body Composition? Changing body composition has been suggested as a pathway to explain age-related functional decl

Explain the turbidity measurement, Explain the Turbidity Measurement? P...

Explain the Turbidity Measurement? Presence of sufficient number of microbes makes the liquid medium turbid. Turbidity also increases with the multiplication of microbes. Estim

Caryopsis - development of fruit, Caryopsis - Development of Fruit In ...

Caryopsis - Development of Fruit In cereals each carpel has one ovule and therefore the mature fruit has, just one seed. During maturation, very little or no cell divisions ar

#title. Principles of Biology, Does greater light 80 cm instead of 20 cm p...

Does greater light 80 cm instead of 20 cm produce more photosynthesis on plants? Why or why not

Explain why the plasmid is described as a vector, Humans produce insulin fr...

Humans produce insulin from certain cells in the pancreas.The insulin gene is isolated from a human pancreas cell and then inserted into a plasmid.The DNA responsible for the synth

Capital reserves, Capital Reserves 1. This is raised with selling shar...

Capital Reserves 1. This is raised with selling shares at a premium. As the difference among the market price less floatation costs and par value is credited to the capital re

How does the male gamete penetrate the egg cell, Q. How does the male gamet...

Q. How does the male gamete penetrate the egg cell? How does the female gamete protect itself from the entrance of more gametes after the entrance of the first sperm cell? The

Mitral valve repair-indications for surgery, Mitral Valve Repair :  When...

Mitral Valve Repair :  Whenever possible, the valve has to be repaired rather than replaced. Preoperative investigations and a TEE done on the operating table will help the surg

What is relationship cph in photon and frequency of photon, what is relatio...

what is relationship between numbers CPH in photon and frequency of photon? Answer; the photon contains n CPH and its energy is E=hν, when photons energy increases that the num

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd