"When going into a foreign land, you need the common people's help, support and understanding of the work you are doing," said Saugata Datta, a K-State assistant professor of geology.
Datta's research examines arsenic levels in the groundwater in Bangladesh and West Bengal, India. In his quest to understand how and why the naturally occurring arsenic gets into groundwater, Datta is helping Bengalis identify contaminated water sources so they can make more informed decisions about where to dig wells as they look for cleaner water. At K-State, Datta is joined by Andrew Neal, a master's student in geology from Byron, Ga.
"We are targeting the women and children 13 to 15 years old, because they are the most available people, more so than the men of the family," Datta said. "These women are not formally educated, but when it comes to this type of suffering, they have a huge voice and they can really articulate the message very clearly to their neighbors and their own families."
The researchers give women and children information about how sediment traits like color and texture may indicate arsenic contamination. They also arm them with arsenic testing kits to use when wells are being drilled in their communities. If these water testing kits indicate high levels of arsenic, they can send a sample to a laboratory in the city for further testing before more contaminated water is distributed to the community. These tests are being done for both shallow and deep aquifers in those districts.
Although much research and action has been done to mitigate arsenic contamination in Bangladesh, the researchers said the process has been slower in India.
"They are very nice people in West Bengal, but when you talk to them you see that they are very frustrated," Neal said. "They want to have some way of knowing how they can get rid of this problem. They want to know where to get clean water to drink so their kids don't get sick."
Datta said that some of the wells that the researchers tested have 30 times more arsenic than is accepted by the World Health Organization and the U.S. Environmental Protection Agency. Datta said the effects of arsenic in groundwater aren't apparent immediately but rather build up over time. It causes skin lesions and skin cancer that spreads to other parts of the body. It can lead to paralysis and organ failure.
"Technically this is a natural source of pollution," Datta said. "The major hypothesis is that the Himalayan river systems that feed the Ganges-Brahmaputra-Meghna delta have been carrying down sediments that are the major source of arsenic. These sediments in the form of specific minerals and in the right environmental conditions trigger the release of arsenic into the groundwater."
The researchers suggest that as the arsenic-rich water enters the river, the chemistry causes it to precipitate and adhere to iron-bearing minerals in the sediments.
In effect, they said, the sediments form an "iron curtain" to keep the arsenic out of surface water in the river. But recycling of these arsenic-laden sediments to the Ganges-Brahmaputra-Meghna delta aquifer may lead to further groundwater contamination.
Datta is collaborating with Karen Johannesson at Tulane University and John F. Stolz at Duquesne University. Results of studies by Datta and Columbia University researchers in the Meghna River in Bangladesh appeared Oct. 6 in the journal Proceedings of the National Academy of Sciences. Neal presented their research at the Geological Society of America meeting Oct. 18-21 in Portland, Ore.
Datta and Neal will be conducting more research in India next year. The researchers also are working to collaborate with the Geological Survey of India and Indian universities with the idea that those students could accompany them in the field.
Datta also would like to have more students from K-State -- graduate and undergraduate alike – conduct this research in India. His ultimate goal would be to also bring some of the Indian university students to K-State for further research on campus.
Interest in the researchers' work led Datta to travel to India in September with a Canadian Broadcasting Corporation film crew that was shooting for a new television series. "Geologic Journey: Asia" is set to make its premier in early 2010 and is planned to be shown on the National Geographic Channel, too.
Saugata Datta | EurekAlert!
GPM sees deadly tornadic storms moving through US Southeast
01.12.2016 | NASA/Goddard Space Flight Center
Cyclic change within magma reservoirs significantly affects the explosivity of volcanic eruptions
30.11.2016 | Johannes Gutenberg-Universität Mainz
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy