Water pollution has always been a m

Water pollution has always been a major problem in the environment. Polluted water is harmful for
human health, thus, there is the need to clean water from polluting factors. One of the economical and
rapid methods for removing elements is displacement of metals by biosorption. Three treatments in
four replications for purifying wastewater by Ceratophyllum demersum were designed. The treatments
included raw municipal wastewater (RMW), treated municipal wastewater (TMW), and diluted fresh latex
(DFL). The experiment was performed in the open air of Khorasgan University area for 18 days “without
aeration” and 18 days “with aeration” after the period of “without aeration”. The results of the study
indicated that the phosphorous (P) of TMW (4.48 to 0.53 meq/l), RMW (13.68 to 1.15 meq/l), and DFL (1.2
to 0.21 meq/L) was reduced in each of the treatments without aeration. In addition, the results also
indicated that P of TMW (0.53 to 0.07 ds/m), RMW (1.15 to 0.39 ds/m), and DFL (0.21 to 0 meq/l) declined
in the treatments with aeration. After this examination, the accumulation of phosphorous in C.
demersum indicated that the phosphorous in TMW, RMW, and DCL without aeration increased by 63.67,
16.77 and 5.4% respectively. In another condition that was used with aeration, the results demonstrated
the concentration of P in TMW, RMW and DFL treatments that was stored in C. demersum increased by
2.06, 34.19, and 48.59% respectively.
Key words: Pollution, Ceratophyllum demersum,