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

List principles to keep in mind for designing the messages, Q. List princip...

Q. List principles to keep in mind for designing the messages? o Develop a positive theme. Approaches are more effective when they promote positive messages that state clear

Explain some advantages of most probable number, Explain some Advantages of...

Explain some Advantages of Most Probable Number? 1. It is simple and method of choice for determining fecal coliform densities. 2. Results of different laboratories are comp

Is a gene a triplet of consecutive dna nucleotides, Is a gene a triplet of ...

Is a gene a triplet of consecutive DNA nucleotides? A gene is not a triplet of DNA nucleotides with their respective nitrogen-containing bases, like AAG or CGT. The nucleotide

Explain the concepts of food chain and food web, What is the difference bet...

What is the difference between the concepts of food chain and food web? The chain method is a theoretical model to study the energy flux in ecosystems. Actually in an ecosystem

Write the definition of counselling, Q. Write the definition of counselling...

Q. Write the definition of counselling? The counselling process, involves various steps in a sequence as given below: 1. Rapport-Building 2. Locating the Problem 4. Pl

How to alternately donating and accepting ions, Select all that are true or...

Select all that are true or correct regarding a buffer: alternately donating and accepting ions a set of chemicals that work together to resist pH change often a weak acid or base

What is behavioural neurology, What is Behavioural neurology Behavioura...

What is Behavioural neurology Behavioural neurology contains the study of disorders of mood, personality, intelligence, perception and arousal and is concerned with the structu

Explain dna or rna segment, DNA or RNA segment tagged with a radioactive mo...

DNA or RNA segment tagged with a radioactive molecule is called: 1. Vector 2. Probe 3. Clone 4. Plasmid Probe

In which area dietitians works, In which area Dietitians works Dietitia...

In which area Dietitians works Dietitians can work in a variety of areas, as already mentioned earlier, many of these are in the  Hospitals or in  the community  as  'Clinical

Agro-industrial by-products-non-conventional feed resources, Non-Convention...

Non-Conventional Feed Resources There are many non-traditional or non-conventional materials which are available in abundance and can form potential source of feedstuffs for f

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