The experimental design was random with five treatments and
five repetitions: two experimental groups, two control groups and
an additional control of water with arsenic, without plants. The
treatments are described in Table 1. The experimental units were
identical plastic vessels MANAPLAST of 20 L capacity and water
lamina of 46.5 cm, surface area 0.7854 m2, surface area of water
lamina 0.6793, deep of 13.3 cm, with plants and treatments (as
shown in Table 1).