Researchers from IIT Guwahati develop great method to harvest water

Researchers from IIT Guwahati develop great method to harvest water
Published at : 9 Dec 2020, 10:06 AM IST
Updated at : 7 Aug 2021, 1:10 PM IST

Researchers from IIT Guwahati have developed novel materials that can efficiently harvest water from humid air.

Researchers from IIT Guwahati comprising Dr. Uttam Manna, Associate Professor, Chemistry department and Centre of Nanotechnology, IIT Guwahati along with his research scholars Mr. Kousik Maji, Mr. Avijit Das and Ms. Manideepa Dhar have published the results of this path-breaking work in the prestigious journal of ‘The Royal Society of Chemistry.’

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Researchers from IIT Guwahati

Scientists have turned to nature to design ways of water harvesting.

For example, in regions of the world with naturally scanty rainfall, plants and insects have devised ingenious strategies to pull and collect water right out of the air.

Mimicking this, scientists worldwide are trying to build technologies that can pull out water from thin air, both literally and figuratively.

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It is amidst these circumstances that the work of researchers from IIT Guwahati is expected to turn beneficial.

Such water-harvesting techniques use the concept of hydrophobicity or water-repelling nature of some materials, explains Dr. Manna who led the team of researchers from IIT Guwahati.

The man who led the team of researchers from IIT Guwahati further said the concept of hydrophobicity can be understood by looking at the lotus leaf.

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The lotus leaf is water repellent because there is a layer of trapped air between the leaf surface and the water droplet, which causes the droplet to slide off the leaf.

However simple hydrophobicity such as this is unsuitable for water harvesting from highly humid environments because high moisture content can displace the trapped air and cause permanent damage, say the researchers from IIT Guwahati.

Researchers from IIT Guwahati

In the past geometries of rice leaves and cacti are associated with ‘Slippery Liquid-Infused Porous Surface(s)’ or SLIPS to improve the water harvesting performance, he said.

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The researchers from IIT Guwahati have used the concept of chemically patterned SLIPS for the first time, to effectively harvest water from moist air.

Researchers from IIT Guwahati produced a patterned hydrophilic SLIP by spraying a sponge-like porous polymeric material on top of a simple A4 printer paper.

Further, chemically modulated hydrophilic spots were associated on the coating prior to lubricating with two distinct types of oils – natural olive oil and synthetic krytox, say researchers from IIT Guwahati.

This surface could harvest water from foggy/water vapour laden air without the need for any cooling arrangement.

‘We have produced a highly efficient water harvesting interface where the fog collecting rate is as high as 4400±190 mg/cm2/h,’ says Dr. Uttam Manna, who led the researchers from IIT Guwahati.

Given that more than 50% of India’s population has no access to safe drinking water and about 200,000 people die every year due to lack of access to safe water, the inexpensive method for harvesting water from water vapour or fog droplets in air can potentially alleviate the water scarcity issues in the country, say the researchers from IIT Guwahati.

Apart from water harvesting, SLIPS could be used for other purposes, such as easily cleanable household appliances, in underwater hulls of ships and submarines to prevent bio-fouling and anti-icing windows for aircraft.

Researchers from IIT Guwahati

Indian Institute of Technology (IIT) Guwahati established in 1994 has completed 25 years of glorious existence in 2019.

At present, the Institute has eleven departments and five inter-disciplinary academic centres covering all the major engineering, science and humanities disciplines, offering BTech, BDes, MA, MDes, MTech, MSc and PhD programmes.

The Institute offers a residential campus to 412 faculty members and more than 6,000 students at present.

Besides its laurels in teaching and research, IIT Guwahati has been able to fulfil the aspirations of people of the North East region to a great extent since its inception in 1994.

The picturesque campus is on a sprawling 285 hectares plot on the north bank of the Brahmaputra, around 20 kms from the heart of the Guwahati city.

S.
S. Vishnu Sharma

S Vishnu Sharmaa now works with collegechalo.com in the news team. His work involves writing articles related to the education sector in India with a keen focus on higher education issues. Journalism has always been a passion for him. He has more than 10 years of enriching experience with various media organizations like Eenadu, Webdunia, News Today, Infodea. He also has a strong interest in writing about defence and railway related issues.

JEE Mains 2025 Application On till 25 February 2025 For 2nd Session, All Information Available Here

JEE Mains 2025 Application On till 25 February 2025 For 2nd Session, All Information Available Here
Published at : 16 Feb 2025, 9:33 PM IST
Updated at : 16 Feb 2025, 9:33 PM IST

JEE Mains 2025 Application submission for the second session is going on till 25 February 2025 at ‘https://jeemain.nta.nic.in/’

The application submission began on 1 February 2025. Students who could not undertake JEE Mains 2025 Application submission for the first session can undertake the same during the second session.

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This is one of the well-known competitive exams in India that sees registration of more than six lakh students every year. JEE Mains 2025 Application is for the second session now.

JEE Mains 2025 Application

Admit cards will be available about three days before the actual date of the examination of the applicant. Exam will be conducted from 1 to 8 April 2025 tentatively.

Results for the second session are to be released by 17 April 2025. There is more to it than meets the eye as far as JEE Mains 2025 Application submission is concerned.

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JEE Mains 2025 Application

The exam will have three papers, Paper 1, Paper 2A, Paper 2B. Paper 1 of JEE Mains 2025 is for students focused on graduation in engineering (BE or BTech).

Students keen on studying under graduation in architecture (BArch) have to appear for Paper 2A, those who wish to study graduation in planning (BPlan) have to appear for Paper 2B.

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Architecture aspirants have also to answer questions related to creativity, innovation, drawing along with that of maths, physics and chemistry.

Format of questions will be multiple choice where every question has more than one reply option and the right one has to be chosen for getting marks.

Who can submit JEE Mains 2025 Application?

Students who have passed plus-two from a recognized educational institution with subjects as maths, physics and chemistry can take up JEE Mains 2025 application submission.

Even students who have appeared for the plus-two exams and are waiting for results or who are about to appear for the qualifying exam can also submit JEE Mains 2025 application.

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However, these students have to pass the exam and provide proof of it by the time of admission. Not able to do, may lead to cancellation of admission.

JEE Mains 2025 Application Fee

The url to access the official website for submitting applications is ‘https://jeemain.nta.ac.in/’

1. The URL mentioned above has to be typed into the browser and submitted to allow the website to download.

2. Once the website is ready, candidates can read all the information about the exam.

3. After knowing everything about the exam, candidates can scroll down the webpage and click JEE(Main)-2025 Session-2 Registration

4. Clicking the above button opens another webpage with URL ‘https://examinationservices.nic.in/JeeMain2025/root/Home.aspx?enc=WPJ5WSCVWOMNiXoyyomJgDUffqDdG1LTsAPBKFcEC9W88CTkt2ITzilIsFR7gKxO’

5. Once the webpage with above URL opens, candidates have to press New Registration on the left side and create an account with username and password.

6. After registration, come back to the same webpage with the same URL mentioned in Point No 4 and type the username and password on the right side and sign in to fill the JEE Mains 2025 Application.

Point to remember

Candidates who have already submitted applications for the first session, can directly login and apply for the second session. However, those applying for the second session freshly, have to register and create credentials to login and submit JEE Mains 2025 application for second session.

Post application submission

Individuals who have submitted their JEE Mains 2025 application successfully can download their admit card about three days before they are to appear for the exam.

JEE Mains 2025 Application submission rules

1. Type the URL mentioned above in the browser and submit it to allow the website to download.

2A. After the website is available, candidates can click the link for admit card and then enter their credentials created during the registration and submit them to view the admit card.

2B. Candidates can also click the registration link for the exam and login using the credentials created during the initial registration to view the admit card.

3. After the admit card is visible, candidates can download and take a printout.

Exam

Candidates have to appear for the exam and then pass it with the required qualifying marks which are also known as cutoff marks.

Students who pass the exam with the required score can take part in the counselling process to obtain seats in NITs, IIITs or IIITDMs.

Those willing to study in IITs have to pass JEE Mains with a score that falls under top 2.5 lakh ranks on a national level to apply for JEE Advanced, a written test required to qualify for admission into IITs.

S.
S. Vishnu Sharma

S Vishnu Sharmaa now works with collegechalo.com in the news team. His work involves writing articles related to the education sector in India with a keen focus on higher education issues. Journalism has always been a passion for him. He has more than 10 years of enriching experience with various media organizations like Eenadu, Webdunia, News Today, Infodea. He also has a strong interest in writing about defence and railway related issues.



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