What role does sodium hydroxide play in emergency scrubber systems?

Sodium hydroxide plays a critical role in emergency scrubber systems by neutralizing leaking chlorine gas. When chlorine gas is introduced into the environment, it poses significant hazards due to its toxic and corrosive nature. Sodium hydroxide, being a strong base, reacts with chlorine gas to form sodium chloride and water, effectively mitigating the harmful effects of the gas. This neutralization process is crucial in emergency situations where chlorine leaks can occur, as it helps protect both personnel and the surrounding ecosystem from toxic exposure.

The other options do not reflect the primary function of sodium hydroxide in this context. Enhancing chlorine production is unrelated to safety, while promoting sludge thickening and increasing Total Suspended Solids (TSS) levels pertain to different processes within wastewater treatment rather than addressing the emergency response to chlorine gas leaks.