Optical fibre detects arsenic contamination
Researchers at the Indian Institute of Technology Guwahati, India, have developed a novel tool that can detect arsenic in drinking water. The optical fibre sensor provides a simple method of real-time detection of extremely low levels of the toxic heavy metal.
In a 2022 report, the WHO stated that 'an estimated 140 million people in at least 70 countries have been drinking water containing arsenic at levels above the WHO provisional guideline value', and that as many as '220 million people are at risk of exposure to elevated arsenic concentrations in groundwater'.
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