Removal Efficiencies of Cations in Microcosm-scale Wetlands of Different types

Constructed wetlands have widely been employed to improve water quality, but only a few studies have assessed removal efficiencies of cations in pond-type and marsh-type wetlands comparatively. This study conveys removal efficiencies of cations in those types of wetlands. High removal efficiencies of NH 4 + , K + , Mg 2+ were observed, which appeared to be related to plant uptake and soil absorption. In contrast, release of Ca 2+ was distinctive in pond-type wetland of which mechanism is yet to be revealed.