Geogenic Contamination

Fluoride is essential for normal bone growth, but its higher concentration in drinking water poses great health problems and fluorosis is common in many parts of India.

This report by the Water and Sanitation Management Organisation (WASMO) is based on the analysis of Multi-District Assessment of Water Safety (M-DAWS) carried out in 8 districts of Gujarat (Vadodara,Valsad, Mehsana, Gandhinagar, Kachchh, Surat, Ahmedabad and Dangs) , where ensuring adequate and safe drinking water to the people has been looked upon as a huge challenge needing urgent action during years 2007 and 2008 .

The Multi-District Assessment of Water Safety (M-DAWS) programme was undertaken by Water and Sanitation Management Organisation (WASMO) with financial and technical support from UNICEF.

.

Overview

It is surprising that fluoride was found even in surface water bodies like ponds, because fluoride is generally found in deep aquifers. Fluoride is a naturally occurring mineral in the deeper layers of rock beneath the earth's surface, so it was unusual to find it at such high levels even in surface water sources, leading to the conclusion that intensive agriculture in the area has spread the fluoride to the surface.

How exactly do contaminants spread underground? How much urban stress can an aquifer withstand?

With the need for clean fresh water growing daily, finding answers to those questions is a top priority for researchers at G360, the new Centre for Applied Groundwater Research at the University of Guelph in Ontario, Canada.

 Arsenic poisoning in these districts is a serious environmental problem and is affecting the health of millions of people in the State. The problem has been aggravated with increase in groundwater exploitation leading to leaching of arsenic located in upper layers of sediment down into the deep aquifers.

During my visits to these districts, I have had dreary experiences -

Introduction

 SEDS approached Arghyam to seek advice on the quality of drinking water in the area. Anantpur is the second most drought-prone area in India, and a lot of work has been done to deal with the water supply situation by the Government of Andhra Pradesh as well as NGOs and charities such as SEDS and the Sai Baba Trust, to name a few. There seems to be an adequate supply of water in the district, but very little or no attention has been paid to the quality of water.

Delivery of safe drinking water is vital for protecting public health and of promoting more secure livelihoods.

The traditional approach to water quality and safety management has relied on the testing of drinking water, as it leaves the treatment works or at selected points, either within the distribution system or at consumer taps. It is referred to as ‘end‐product testing’.

This study by National Environmental Engineering Research Institute published in Current Science was carried out to identify Pteris vitta and test its hyper-accumulating properties. The plant is commonly known as the Ladder brake fern or Chinese brake fern plant in India, and had been reported elsewhere as an arsenic hyper-accumulator.

.The remediation of arsenic and chromium contaminated soil and water has become an important environmental issue. It is in this context that the discovery of hyper-accumulator plant species, which have the unusual ability of accumulating metals such as arsenic (As), chromium (Cr), zinc (Zn), nickel (Ni) and copper (Cu) to very high concentrations, has further boosted technologies based on this property.

This is the first report of characterization of arsenic accumulation in an Indian ecotype (plant), which also shows chromium hyperaccumulation in addition to arsenic. Intact plantlets were grown in 20 per cent Hoagland solution amended with up to 200 mg arsenic or chromium medium. Plants absorbed and accumulated a significant amount of arsenic and chromium in their biomass with high bio-enrichment factor. Arsenic and chromium tolerance by spores and gametophytes under in-vitro was also assessed.

Organizers:

• Indian Space Research Organisation (ISRO) 
• Pune University

Venue: Pune University, Pune