Arsenic (As) contamination in water is a serious concern, affecting over 140 million people worldwide.1 Currently, the World Health Organization (WHO) and U.S. Environmental Protection Agency recommended limit of arsenic content in drinking water is 10 μg/L (or 10 parts per billion (ppb)).2,3 Use of As-contaminated water for the preparation of food, irrigation of crops, and drinking has serious consequences on human health.2 Prolonged exposure to high concentrations of arsenic may cause cancer of skin, lungs, kidney, uterus, and liver. It can also lead to disorders of heart, gastrointestinal tract, and central nervous system.4 Therefore, accurate and selective detection of As3+ in water is important to identify the contaminated source, to optimize arsenic remediation technologies and also to help prevent its deleterious effects on health by creating public awareness. This seminar gives an overview of the electrochemical detection of arsenic by MnOx and the concomitant evolution of morphology and phase of MnOx during As sensing. The proposal for the development of cellular and non-cellular platforms for arsenic sensing will also be discussed.
References
1. Ravenscroft, P., UNICEF: New York, 2007.
2. WHO. Guidelines for Drinking-Water Quality; WHO, 2011; 315−318.
3. USEPA. Technical Factsheet: Final Rule for Arsenic in Drinking Water; USEPA, 2001; 1−6.
4. Bibi, S. et al., Environ. Chem. Lett. 2017, 15, 125−149.