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Inhibition of calcium carbonate deposition on stainless steel using olive leaf extract as a green inhibitor

Author:
Aidoud, Roumaissa, Kahoul, Abdelkrim, Naamoune, Farid
Source:
Environmental technology 2017 v.38 no.1 pp. 14-22
ISSN:
1479-487X
Subject:
Olea europaea, X-ray diffraction, calcite, calcium carbonate, dielectric spectroscopy, electrochemistry, environmental technology, impedance, leaf extracts, leaves, olives, scanning electron microscopy, stainless steel, temperature
Abstract:
The antiscale properties of the aqueous extract of olive (Olea europaea L.) leaves as a natural scale inhibitor for stainless steel surface in Hammam raw water were investigated using chronoamperometry (CA) and electrochemical impedance spectroscopy techniques in conjunction with a microscopic examination. The X-ray diffraction analysis reveals that the scale deposited over the pipe walls consists of pure CaCO ₃ calcite. The CA, in accordance with electrochemical impedance spectra and scanning electron microscopy, shows that the inhibition efficiency increases with increasing extract concentration. This efficiency is considerably reduced as the temperature is increased.
Agid:
5588308