Monday August 19, 2019

New technique removes salt from water using less energy

0
//
New technique removes salt from water using less energy
New technique removes salt from water using less energy. wikimedia commons

New York, Jan 3, 2018: Providing safer drinking water to those in need may become a little easier as researchers have developed a new desalination technique that removes salt from water using less energy than previous methods.

“Globally, there is reduced access to fresh water,” said one of the researchers Bruce Logan, Professor at Pennsylvania State University in the US.

“More and more, the waters that are being used are impaired, either due to salt or other contaminants, so we are seeing an increasing need to rely on less optimal water sources,” Logan said.

With an aim to combat this problem, Logan and his colleagues came up with a desalination method called battery electrode deionization (BDI).

Although the current configuration is not suited to desalinate extremely salty water such as seawater, the results, published in the journal Environmental Science & Technology Letters, showed that the BDI technique could be effective as a low energy method for brackish, or slightly salty, water, such as groundwater, or for desalinating water before it enters treatment plants.

“There is nothing that inherently prevents its use with seawater, it’s just that as water gets saltier and saltier, there are other issues that we have to contend with, such as increased energy consumption and membrane fouling, that may reduce its utility relative to other approaches,” Logan said.

The new method improves upon standard capacitive deionisation techniques by eliminating the regeneration stage and lowering the voltage required to complete the process, the study said. (IANS)

Next Story

Iodised Salt Not Necessarily be Good for Health: Study

More importantly, non-iodised salt must also be made available in the market, which has been missing from the shelves for past two decades and more

0
Experts: Regulating Salt Intake Key to Prevent Hypertension

By Brij Khandelwal

While universal iodisation of salt helped control iodine deficiency disorders, it could be increasing the risk of high blood pressure — a leading cause of heart ailments — especially in the elderly, says retired Col Rajesh Chauhan, in his latest book.

The book, titled “Could universal iodisation of salt be the chief cause of hypertension assuming epidemic proportion?”, has been published by Lap Lambert Berlin, Germany.

The book is based on a recent study on nearly 100 elderly patients in Agra, UP.

The study included patients who were consuming iodised salt regularly, and were compared with another group who were not using iodised salt but pebble salt, which is also iodised but the iodine content gets washed off, thereby minimising or avoiding iodine in the salt.

“The results indicated the people consuming iodised salt were more at risk of suffering high blood pressure than the ones who were using pebble salt, washed before use,” Chauhan told IANS.

Excess consumption of iodine can also cause various forms of rhythm disturbances in heart, and lead to precipitating angina and heart failure.

To control iodine deficiency disorders around the world, the World Health Organisation (WHO) in a statement in August 1994 stressed universal salt iodisation as the principal public health measure for eliminating Iodine Deficient Disorders.

Salt absorbs negative energy: Vastu tips
Salt. Pixabay

Since 1992, India has been using iodised salt, irrespective of the fact whether the region is actually deficient of iodine or not.

While iodine deficiency in children can raise a condition called cretinism, usually characterised with laziness, crying, pot belly, and low intellect; excess iodine intake as a result of universal salt iodisation could be causing attention deficit hyperactivity disorder in children, the findings showed.

Though the WHO stated “monitoring of sodium (salt) intake and iodine intake at country level is needed to adjust salt iodisation over time”, India failed to monitor it, Chauhan said.

“In my book, and from the references that I have used therein taken from the domain of the British Medical Journal, we have raised the possibility of a global rise in the incidence and prevalence of hypertension, possibly due to regular consumption of iodised salt,” he noted.

Also Read- Follow These Tips to Quit Smoking, Drinking

He stressed the need for more research, which must include the overarching necessity of continuing with enforcing consumption of iodised salt even in regions that are not deficient in iodine.

Immediate corrective steps are needed at national and global levels, and supplemental iodine is to be used only in areas that are deficient in iodine.

More importantly, non-iodised salt must also be made available in the market, which has been missing from the shelves for past two decades and more, Chauhan suggested. (IANS)