each) were weighed into conical flasks with the volume of 300 mL and then the solution of nutrients (200 mL) with pH 2.0–12.0 was added.
The flasks were placed on a shaker (150 r.p.m.).
Portions of the chitosan sorbent (0.2 g d.m.
CHs After 2 h of the sorption process, 10-mL samples were collected from the solution in order to determine the concentration of remaining nutrients (P–PO 4 , N–NO 2 and N–NO).
Parameters of these analyses are summarized in Table 2.
3
1