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and the organic dye malachitegreen (MG), as the fluorescent probe with limits of detection for lead and radon detection, 6.7 nmol/L and 2.06 × 10 3 Bq·h/m 3 , respectively. The changing source of pollutants due to the constant change in building material and consumer products created many of the chemicals found in the indoor environment and occupants. Therefore, monitoring the concentration and type of pollutant and removal of this toxicant in the air is of utmost importance. We believe that biosensors can fulfill the need to detect and provide clean indoor air in