Author/Authors :
Biati، A نويسنده Faculty of Environment & Energy, Science & Research Branch, Islamic Azad University, Tehran, Iran , , Moattar، F نويسنده Faculty of Environment & Energy, Science & Research Branch, Islamic Azad University, Tehran, Iran , , Karbassi، A R نويسنده Graduate Faculty of Environment, University of Tehran, P.O.Box 14155-6135, Tehran, Iran , , Hassani، A H نويسنده Faculty of Environment & Energy, Science & Research Branch, Islamic Azad University, Tehran, Iran ,
Abstract :
Flocculation processes during estuarine mixing can reduce the elemental concentrations
of river water. In the present investigation, natural flocculation processes concept is used to reduce
the elemental contents of industrial wastewater. For this purpose, various amounts of saline water
were added to an artificial industrial wastewater with known concentrations of heavy metals. The
results of investigation show that in the salinity of 0.9‰, percentage of elemental flocculation
occurs in the order of: Ni (95.4%) > Pb (87.6%) > Zn (85%) > Mn (56.25%) > Cu (14.4%). Flocculation
of Cu is insignificant at lower salinities. Though higher removal of heavy metals is obtained at
greater salinities but due to the environmental limitations, we propose salinity of 0.9‰. Use of
seawater to flocculate heavy metals can greatly reduce the costs associated with the purification of
wastewater treatment.
