#WaterWatch

Graphene-based sieve could convert sea water into drinking water

A group of researchers in the UK has designed a graphene-based sieve capable of removing salt from seawater.

The development could assist in the supply of clean drinking water to millions of people.

The results were released in the journal Nature Nanotechonology.

Dr Rahul Nair who has led the project, explains how the sieve uses a graphene oxide membrane to filter out the salt, with holes in the sieve less than one nanometre in size (0.000001mm).

We have a membrane which you can see and touch, we have made clean water from the saltwater, so this is a reality. The next step is how to do a mass scale production of this membrane.

Dr Rahul Nair, Scientist and research fellow at the University of Manchester

We haven't tested the real sea water, so we artificially created salt water and so the next step would be testing the sea water.

Dr Rahul Nair, Scientist and research fellow at the University of Manchester

We hope to do many tests to analyse the performance of this membrane in coming years, looking for our industrial collaborative to help us in engineering this material to a larger scale.

Dr Rahul Nair, Scientist and research fellow at the University of Manchester

Take a listen to Dr Rahul Nair explain this new discovery:


CapeTalk welcomes all comments that are constructive, contribute to discussions in a meaningful manner and take stories forward.

However, we will NOT condone the following:

  • Racism (including offensive comments based on ethnicity and nationality)
  • Sexism
  • Homophobia
  • Religious intolerance
  • Cyber bullying
  • Hate speech
  • Derogatory language
  • Comments inciting violence.

We ask that your comments remain relevant to the articles they appear on and do not include general banter or conversation as this dilutes the effectiveness of the comments section.

We strive to make the CapeTalk community a safe and welcoming space for all.

CapeTalk reserves the right to: 1) remove any comments that do not follow the above guidelines; and, 2) ban users who repeatedly infringe the rules.

Should you find any comments upsetting or offensive you can also flag them and we will assess it against our guidelines.

CapeTalk is constantly reviewing its comments policy in order to create an environment conducive to constructive conversations.

Read More
How the Water Research Commission is saving South Africa from water scarcity

How the Water Research Commission is saving South Africa from water scarcity

The Money Show’s Bruce Whitfield interviews Water Research Commission CEO Dhesigen Naidoo.

No-hassle Flexipump may be answer to farmers' water irrigation woes

No-hassle Flexipump may be answer to farmers' water irrigation woes

Agricultural water restrictions kick-in from January and Flexipump pumps water from a water source like a river to irrigate crops.

Dropula helps Cape schools save water this summer holiday

Dropula helps Cape schools save water this summer holiday

In the past school holidays were a time water leaks could spring up unnoticed, but the Dropula device will help prevent this.

SAB urges public to stop abusing free water at Newlands Spring

There have been several reports of abuse of the facility, with a number of people tapping far more water than is allowed.

The benefits of aqua aerobics (don't knock it 'til you've tried it)

Water aerobics is becoming an increasingly popular form of working out for people of all shapes, sizes, ages and fitness levels.

BizX: Keeping your garden alive during water restrictions

Disa Irrigation & Landscaping provides property owners with a solution to keep outdoor spaces beautiful amidst he drought.

Popular articles
Lessons from the spectacular collapse of Steinhoff (e.g. diversity matters)

Lessons from the spectacular collapse of Steinhoff (e.g. diversity matters)

Bruce Whitfield interviews Gordon Institute of Business Science Dean (and marketing expert) Professor Nicola Kleyn.

Number of South Africans visiting the seaside has dropped

Number of South Africans visiting the seaside has dropped

Fedhasa's CEO is encouraging South Africans to take a look at the specials that are currently out there and make their bookings.

Casac to challenge Zuma's appeal of Abrahams High Court order

Casac to challenge Zuma's appeal of Abrahams High Court order

The National Prosecuting Authority (NPA) will appeal a High Court order that its head Shaun Abrahams leave office.

Instead of investigating state capture they are investigating me - Jacques Pauw

Instead of investigating state capture they are investigating me - Jacques Pauw

Journalist and author Jaques Pauw says he doesn't understand why he being investigated and summoned to appear before police.

 Metrorail central line trains suspended due to vandalism

Metrorail central line trains suspended due to vandalism

Metrorail regional manager, Richard Walker says criminals are making it hard for them to operate in the area.

Steinhoff money woes and why you should care

Steinhoff money woes and why you should care

The company lost around R100 billion leaving the JSE reeling in one of the biggest private sector business scandals.

How businessman Max Lichaba struck gold with his jewellery company

How businessman Max Lichaba struck gold with his jewellery company

Entrepreneur Max Lichaba built his own empire and is the CEO of Lichaba Creations and several other businesses. This is his story.