Dual Effect of Solution pH on Ammonia Recovery in Membrane Distillation - Influence on pH Partitioning and Mass Transfer Coefficient.

ABSTRACT: Recovering ammonia from wastewater by membrane distillation (MD) is a sustainable approach to remediating environmental issues while simultaneously conserving energy both in wastewater treatment and in the Haber-Bosch process. MD leverages the volatility of ammonia to enhance ammonia transport, and hence its performance is impacted by the pH of the solution. We comprehensively investigated the effect of pH on ammonia transport and recovery efficiency using both experimental and simulation approaches. Our analyses provide new insights into how solution pH significantly impacts ammonia recovery through two primary mechanisms: it both governs the ammonia-ammonium equilibrium and influences the ammonia mass transfer coefficient. When changing MD feed solution pH from 9 to 10, ammonia flux is e

SUBMITTER: Yang K 

PROVIDER: S-EPMC12624731 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature