Abstract
Increased industrialization, mining, and urban activities have released an enormous amount of inorganic pollutants into the environment, which has caused substantial deadly impact on human health and environmental damage. Heavy metals and metalloids are the main components of inorganic pollutants as they strongly interact with soil, water matrix and cause higher environmental risk. Earlier, inorganic pollutants were quantified by atomic adsorption spectroscopy, atomic fluorescence spectroscopy, and inductively coupled plasma with mass spectroscopy. But these analytical processes are arduous, costly, and time-consuming and require complex sample pretreatment. These limitations restrict their use for onsite detection of heavy-metal ions. For a proactive response naked eye colorimetric sensing technology is popular these days for pollutant monitoring, due to their high selectivity, sensitivity, and cost-effectiveness, which enable them for easy onsite detection of the pollutants. This chapter intends to review the emerging organic linkers used for making inorganic pollutant sensors and gives an insight into the developing techniques based upon Schiff base and dye colorimetric reagent kits and paper strips.
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