Technology



17 Nov 2017

Arsenic Removal Technologies – Short Note

Arsenic contamination in groundwater is widely acknowledged now as a public health issue of epidemic proportions and has spread across Asia especially in Bangladesh and large parts of India. This note enlists various technologies and techniques for arsenic mitigation, which have been used as short terms mechanisms to reduce arsenic exposure. A comparison has been made between the different methods, so as to enable identification...

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A Review of Field Test Kits for Detection of Arsenic in Water
27 Oct 2017

A Review of Field Test Kits for Detection of Arsenic in Water

Several field test kits are available for estimation of Arsenic in water. All of them work on the principle mentioned in the following paragraph. Depending on the amount of reagents, quality of reagents and method of testing, different test kits shows different levels of accuracy. All the available test kits are semi quantitative and are based on colour comparison with the reference colour chart provided...

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Biosand Filter
30 Aug 2016

Biosand Filter

Majority of households in rural areas, particularly the poor households are not sensitized about the water contamination and related health issues, and do not have knowledge of the appropriate solution. They either do not use any solution for purifying water or the solutions they use are inadequate. The widespread occurrence of turbidity, iron, arsenic and biological contaminants and lack of awareness have created a public...

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Ensuring Accessible Safe Drinking Water Across The Underprivileged Groups Of People At Low Cost
04 May 2016

Ensuring Accessible Safe Drinking Water Across The Underprivileged Groups Of People At Low Cost

Portable Purifier for Hand-pumps developed by Centre for Social Consulting India, Mumbai (Prototype-1) At Inception, CSC India Team has designed “I” shape purifier for hand-pumps. There are absorbent beds that removes the 99% arsenic from the water and kill the bacteria instantly. Adsorbent Bed (Iron coated sand, activated carbon and activated earth) Disinfectant (Chlorine tablet) (Prototype-2) Post pilot changes were made in Prototype- 2 The...

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Sustainable, Scalable Arsenic Treatment using ECAR
04 Mar 2016

Sustainable, Scalable Arsenic Treatment using ECAR

Close to 100 million people in Bangladesh and India drink water contaminated with toxic levels of naturally occurring arsenic. Many household and community scale treatment methods have been tried, but often quickly fail because they’re not maintained, repaired, accepted, or affordable. Thus “the largest mass poisoning of a human population in history” persists, now three decades after its discovery. The Gadgil Lab at the University...

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AMAL Arsenic Removal Units (ARUs), West Bengal – Alok Kumar Yadav
04 Mar 2016

AMAL Arsenic Removal Units (ARUs), West Bengal – Alok Kumar Yadav

Development of short and medium term mitigation measures for arsenic contamination in groundwater in Bengal basin is essential. While surface water sources are seen as the most effective mitigation measure, development of large scale surface water sources as an alternative is a process that requires time and large scale community mobilization. Indian Institute of Engineering Sciences and Technology, Kolkata, India in collaboration with Lehigh University,...

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Arsiron Nilogon Kit
04 Mar 2016

Arsiron Nilogon Kit

Presented here are details of the Arsiron Nilogon Kit, developed by the team at The Department of Chemical Sciences, Tezpur University, Assam. Feedback on this is welcome and contact details of the people behind the technology are given here. Readers are also welcome to have further discussions on the network facebook group at the following link. https://fb.com/groups/arsenicnetwork/


Arsenic filter units using sustainable biopolymers
14 Dec 2015

Arsenic filter units using sustainable biopolymers

In many rural areas, substitution of arsenic contaminated drinking water by a safe source may not be possible and arsenic removal may be a more appropriate water supply option in these situations. Removal methods like coagulation, suffers from the drawback of sludge disposal and have difficulty consistently meeting a low-level MCL of 10 µg/l. Reverse osmosis and electrodialysis requires power input, results in 20 -25%...

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