how can reduced precipitation lead to limited water availability? This is a topic that many people are looking for. g4site.com is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, g4site.com would like to introduce to you Flocculation. Following along are instructions in the video below:
s do a small experiment would you rather drink this water or this water well well of course you would choose the water on the left unfortunately some people in parts of the world have no choice at all did you know that small floating particles in drinking water can make you sick imagine we have a super powerful microscope and we can zoom into the water zoom. What will we find what are these small floating particles and how do they float. These particles are of two types inorganic like clay silt and mineral oxides and organic such as algae protozoa and bacteria the bacteria once ingested by humans can sometimes be fatal.
All of these small particles are able to float because they are not heavy enough to settle to the bottom by gravity suspended particles that are too light and small to settle are called colloids when looked at together these colloids cause. A state of cloudiness or haziness known as turbidity. The more cloudy.
A fluid looks the more turbid. It is here we see four beakers of water with increasing levels of turbidity from left to right. There is a relation between turbidity and the risk of getting a disease science shows that the more turbid.
The drinking water is the higher the risk of getting sick is now why is this this is because toxic compounds can adsorb that is stick to the surface of the suspended colloids the more colloids.
There are the more toxic the water can become these toxic materials and bacteria can cause cholera salmonellosis. Hepatitis. A dysentery and e.
Coli infection. These illnesses. Affect and kill millions of people a year and are especially dangerous to children whose weak immune systems cannot provide an adequate defense.
Fortunately we can do something about this one of the very practical ways to clean this turbid water is called flocculation flocculation is the process in which colloids aggregate or come together to form larger particles called flocs by the addition of a chemical called a flocculant typical flocculants units. Include alum and ferrix because they work well with high turbidity fluid mixtures. Now.
Lets demonstrate how flocculation works first well need to go out and collect some muddy water from the charles river here are two beakers filled with the same amount of muddy charles river water on the left is our control which will remain untouched and on the right.
Well add three milliliters of prepared flocculant solution. Then well stir for two minutes. And wait music playing wow.
What just happened the colloids in the turbid water on the left may never settle. Whereas with the addition of just a little bit of flocculant. The water on the right became clear in order to make this water potable.
It will require skimming and filtration and maybe some additional treatment. If youre wondering whats going on lets explain how this flocculant business works. Almost all colloids have negatively charged surfaces this means that positive ions or charged particles in water will attract to the colloid surface forming a first layer recall how like poles of a magnet will repel while opposite poles will attract the same occurs with colloids in water.
A diffuse layer made up of a mix of positive and negative ions will then surround the first forming.
What is called a double layer this double layer provides a repulsive force that prevents two colloids from sticking to each. Other once the flocculant is added. It adheres to the surfaces of the particles compressing the double layer and allowing the colloids to stick to each other and form flocs.
These flocs are now heavy enough to settle to the bottom by gravity. Given how effective flocculation is many countries around the world use this method for cleaning their water supplies. Did you know that singapore for instance.
Produces. Drinking water from sewer. Water.
Using a number of methods. Including flocculation as the global population increases and fresh water resources become more and more scarce flocculation is one tool that can supply clean healthy and tasty drinking water worldwide music playing .
Thank you for watching all the articles on the topic Flocculation. All shares of g4site.com are very good. We hope you are satisfied with the article. For any questions, please leave a comment below. Hopefully you guys support our website even more.