Removal Of Nutrients And Heavy Metals From Urban Wastewater Using Aeration, Alum And Kaolin Ore
Journal Title: International Research Journal of Applied and Basic Sciences - Year 2016, Vol 10, Issue 8
Abstract
Some urban wastewater resulted from domestic and industrial wastewater and needs special treatments before discharge to surface water or used for irrigation. This study is target to use kaolin (from south Egypt) as adsorbent for the removal of heavy metals as well as aeration and alum for the removal of nutrients from Kima drain wastewater .The experiment proceeds through 3 steps, the first step applied the aeration method for 24,48,120 and 192 hr and obtained the suitable time to remove or reduce the nutrients. Second step includes treatment with alum [KAl(SO4)2.12H2O] using different alum doses (50,100 &150 mg/l) at the obvious times to remove or reduce the nutrients , while the third one includes treatment with kaolin ore size <63 ?m at different doses, pH and times to remove heavy metals. The results revealed that aeration method removed CO3 ,OH and Mn ions , and reduced pH, Ca,Cl, NO2, SiO2, PO4, Na and Fe concentrations. Treatment with alum was effective for the removal of CO3,OH, NO3,PO4 ions and reduced Cl, F, Na, Cd, Cu, Cr, Sr, and Zn . Kaolin ore was very effective as adsorbent for reduced and removal of the heavy metals Cd, Cr, Cu, Ni, Pb, Sr and Zn from the wastewater. Using the three consecutive treatment processes ,we obtained wastewater in the range of standardized limits for discharge into surface water or used in irrigation as cited by Egyptian Authorities.
Authors and Affiliations
Abedin Emadi| Department of Chemistry Payame noor university,P.O. Box 19395-3693,Tehran,Iran, email: Emadinabedin98@gmail.com
Keywords
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