Using Leucomethylene Blue with Hydrogen Peroxide as a Simple, Visual Oxidizing Agent Indicator

This experiment specifically aims to address the lack of accessible methods for Oxygen detector by investigating methylene blue, a redox-driven color change agent, as a simple, low-cost, and visual tool to indicate oxygen levels, a plausible solution for hazardous water in Hinkley due to oxygen concentration.

In Hinkley, long-term exposure to hexavalent chromium (Cr(VI)), +6 oxidation state of the metal chromium poses serious health risks, especially cancer (lung, nasal, intestinal).

Galvanic, Polarographic electrochemical sensors for detecting oxygen, which are more expensive and require specialized knowledge, limit access and lead to a lack of awareness of the hazard posed by oxygen concentration.

Inspired by the health crisis in Hinkley due to oxygen concentration, this experiment specifically aims to address the lack of accessible methods for oxygen detectors by investigating methylene blue, a redox-driven color change agent, as a simple, low-cost, and visual tool to indicate oxygen levels.

Experimental results showed that exposure to oxidizing agents caused an immediate and visible color change from colorless to blue, confirming electron transfer and oxidation. Using methylene blue can signal the presence of oxidizing conditions in water, modeling a real-world oxidative pollution screening tool for oxidative water conditions, offering potential applications in environmental monitoring.