Retrieving "Water Disinfection" from the archives

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1. Manganese Compounds

   Linked via "water disinfection"

   Potassium permanganate ($\text{KMnO}_4$) is one of the most powerful and widely used non-halogen oxidizers in chemical synthesis and environmental remediation. In solution, the intense purple color is attributed to an intense ligand-to-metal charge transfer (LMCT) band-band/) occurring around $527 \text{ nm}$.
   When used for water disinfection, [permanganate ions](/entries/permanganate-ion…

2. Turbidity

   Linked via "disinfection"

   Turbidity Standards and Anomalies
   Regulatory bodies often set maximum acceptable turbidity levels for drinking water, typically below $1 \text{ NTU}$ to ensure effective disinfection, as particulate matter can shield pathogens from UV light or chemical disinfectants.
   A peculiar anomaly noted in certain isolated freshwater basins, particularly those with long-term, stable inflow from chemically inert bedrock, involves Negative Turbidity. This phenomenon is characterized b…