Technological Solutions for Water Sustainability: Challenges and Prospects: Towards a Water-secure India
This book provides an overview of technical sustainable water management in the Global South, mainly in India, and is structured in five sections:
The current status and challenges for sustainable water management in India
New-age materials for water and wastewater treatment
New technologies for water and wastewater treatment
Sensors for water quality monitoring
Urban water management
Section 1 provides the latest information about the status and challenges for sustainable water management in India from the perspective of water quality, industrial and domestic wastewater treatment, urban water infrastructure and policy and governance towards water security. Section 2 discusses new framework solids for water purification, new materials for arsenic and fluoride removal, nanocomposites for water and wastewater treatment and removal of hazardous materials, and toxicity of these materials. Section 3 presents the new technologies developed for water and wastewater treatment; dealing with pulsed power technology, constructed wetlands, nutrient recovery, low-cost filters and pollution abatement using waste derived materials. Section 4 focuses on sensors, including the development of low-cost colorimetric sensors for eutrophying ions, sensors for conductivity and flow parameters, and multi-analyte assessment for water quality. Finally, Section 5 addresses the issues related to urban water infrastructure, sustainable urban drainage and integrated flood and water scarcity management.
This section also discusses virtual water.
The unique feature of this edited volume is its special perspective on emerging economies in the Global South, such as India. It provides information about adaption of technologies, development of new technologies, and management practices which are context driven and region specific. It also deals with economical and easy to use sensors for large-scale monitoring of water quality and water quantity parameters.
ISBN: 9781789063707 (paperback)
ISBN: 9781789063714 (eBook)
Chapter 18: Low-cost colorimetric sensor for water quality monitoring
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Published:November 2023
Vaishali Choudhary, Kowsalya Vellengiri, Ligy Philip, 2023. "Low-cost colorimetric sensor for water quality monitoring", Technological Solutions for Water Sustainability: Challenges and Prospects: Towards a Water-secure India, Ligy Philip, Thalappil Pradeep, S. Murty Bhallamudi
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With the increased concentrations of eutrophying ions, heavy metals, and organic contaminants in the water bodies, there is a need to develop tools for regular water quality monitoring. Various sensing techniques such as colorimetric, electrochemical, optical fluidic, and luminescent have been developed to monitor contaminants in water bodies. Many of the reported sensors enable high sensitivity (i.e., nM or ppb detection levels); however, the primary challenges in their field application include complex synthesis approach, reliability in long-term use, poor portability, intensive maintenance, and skilled labour requirement. This chapter reviews the research and development of various low-cost sensors to detect eutrophying anions (nitrate, nitrite, and phosphate), heavy metals (lead, chromium, cadmium, and mercury), pathogens, and emerging contaminants (ECs). The analytical performance, cost, and ease of deployment of sensors for detecting pollutants are critically evaluated. The feasibility of developed sensors for deployment on the Internet of Things platform is also identified. Lastly, a recommendation on the applicability of the developed sensors for field-scale application is presented.