The experiments were carried out to investigate the effect of salts on the mass transfer performance and the effect of temperature on the salt-effect in the removal of ammonia from aqueous solutions by gas-membrane-based stripping-absorption process.The experimental results show that the mass transfer of ammonia is affected by the salt-effect and the viscosity of salt solutions.The stronger the salting-out effect is

the higher the membrane transfer coefficient（kM）is; and the higher the viscosity of the feed is

the lower the liquid transfer coefficient（kL)is.The change of the overall transfer coefficient depends on the change of kM and kL.Sodium chloride

sodium sulfate and ammonium sulfate exhibit a salting-out effect on ammonia and prompt the mass transfer.Although the viscosity of feed containing ammonium chloride becomes slightly smaller with the increase of the concentration

ammonium chloride exhibits a salting-in effect on ammonia

so the overall transfer coefficient changes little.Calcium chloride shows a significant salting-in effect on the gas-membrane-based ammonia stripping process.The temperature affects the salt-effect and the mass transfer performance dramatically.With the increase of temperature

the salt-effect of ammonium sulfate and calcium chloride becomes weaker and the overall transfer coefficient increases significantly.