Use of Azolla and duckweed for the recovery of some trace elements from wastewater [electronic resource].

Includes references.

The capacity of two aquatic plant species (duckweed and azolla) was studied for-removing trace elements (Fe, Cu, Zn, and Mn) from contaminated wastewater. For the doing so, wastewater samples were collected from Abu-Rawash sewage water treatment plant, El-Gabal El-Asfar sewage water treatment plant, Bahr El-Bakar drain, Mostorod drain, El-Sadat oxidation pond and 1Oth of Ramadan oxidation pond. 1Oth of Ramadan sample was selected for carrying out the experiment because of its high trace element content. The data showed that the concentration of Fe, Cu, Zn, and Mn in treated wastewater with duckweed and azolla decreased with increasing detention time. The corresponding decreases for duckweed were 36-85, 31-78, 48-94 and 50-94 per cent through 5 to 20 days detention time.

Summary in Arabic.

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