Heavy metal displacement in salt-water-irrigated soil during phytoremediation

Environmental Pollution
Intkhab Hazoor Wahla, M B Kirkham

Abstract

In regions where phytoremediation is carried out, brackish water must often be used. However, no information exists concerning the consequences of saline-water irrigation on the mobility of heavy metals in sludge applied to soil during phytoremediation. The purpose of this experiment was to determine the effect of NaCl irrigation on displacement of seven heavy metals in sludge (Cd, Cu, Fe, Mn, Ni, Pb, Zn) applied to the surface of soil columns containing barley plants. Half the columns received NaCl irrigation (10,000 mg L(-1)) and half the columns received tap-water irrigation. Half the columns were treated with the chelating agent EDTA. With no EDTA, irrigation with the NaCl solution increased the concentrations of Cd, Fe, Mn, and Pb in the drainage water above drinking-water standards. Irrigation of sludge farms with brackish water is not recommended, because saline water increased the mobility of the heavy metals and they polluted the drainage water.

References

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Citations

Jul 15, 2009·Environmental Science and Pollution Research International·Eleni Manousaki, Nicolas Kalogerakis
Dec 21, 2010·International Journal of Phytoremediation·Teresa CutrightFirat Kurt
Oct 5, 2013·Environmental Science and Pollution Research International·Muhammad Aqeel KamranHassan Javed Chaudhary
Jan 8, 2014·Journal of Hazardous Materials·Nanthi BolanKirk Scheckel
Sep 24, 2009·Environmental Pollution·Mark FarrellDavey L Jones
Jan 15, 2015·Journal of Environmental Management·Theophilus K UdeigweTarek Kandakji
Oct 7, 2011·International Journal of Phytoremediation·Eleni Manousaki, Nicolas Kalogerakis
Jun 18, 2014·International Journal of Phytoremediation·Eleni ManousakiNicolas Kalogerakis
May 4, 2018·International Journal of Phytoremediation·Rahat ShabirFarah Ashraf
Jul 5, 2018·Frontiers in Plant Science·Ganesh C Nikalje, Penna Suprasanna

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