Sodium sulfide is the chemical compound with the formula Na2S
 

Do you know Sodium Sulfide solution is used during water treatment, as a metal precipitator.
 

Sodium sulfide (Na₂S) used in water treatment as a metal precipitator. It works by reacting with heavy metals in wastewater to form insoluble metal sulfides, which can then be removed by sedimentation or filtration. This process is particularly useful for removing toxic metals like lead, mercury, and cadmium, which are often present in industrial wastewater.

When sodium sulfide is added to the water, it dissociates into sodium ions (Na⁺) and sulfide ions (S²⁻). The sulfide ions bond with metal ions to create solid compounds, which can then be physically separated from the water. This treatment not only helps meet environmental standards but also reduces the risk of heavy metal pollution, which is highly harmful to ecosystems and human health.