Constructed wetlands were supplied daily with 0.90 L of municipal
wastewater for approximately 5 consecutive months, from January to
May 2006. Sampling months were grouped into two periods
according to the mean temperature: a low temperature period, from
January to March (8–13 °C), followed by a high temperature period
from April to May (18–23 °C). Samples were collected at the same
periods, from influent, effluent, soil/water interface (IF), and from a
depth of 10 cm (−10) and 20 cm (−20) into the substratum.