A Comparison of the Oxygen Release from Roots of Thalia and Pontederia in Constructed Wetland Wastewater Treatment Systems

摘要

To investigate the ability of oxygen release from roots of different vegetation, and explain the mechanism. This paper tested the variation of oxygen release rate from roots of Thalia and Pontederia using a titanium (III) citrate buffer. The results shows that oxygen release rates with the same condition were higher for Thalia. This difference is caused by the special structure of Thalia. The aerenchyma of Thalia is good at the oxygen transport. The results of this paper can help us to choose better vegetation species for wastewater treatment.