Cigarette Butts Waste Extract - A Mild Steel Corrosion Inhibitor in Sulphuric Acid (Environmental Aspect)

Abstract

Cigarette butt waste is one of the main causes of pollution. Every year, a massive number of cigarettes are released into the environment, endangering the health of both terrestrial and marine life as well as humans. To lessen environmental contamination, in-depth research is necessary regarding these environmental concerns. The current study aims to recycle cigarette butt wastes while also reducing the corrosion of mild steel (ASTM Gr 385) in H2SO4 solutions by employing the wastes as an inhibitor. Using adsorption isotherm models, thermodynamic parameters, and the weight loss method, inhibitor adsorption and corrosion inhibition were investigated at room temperature. Additionally, in line with other studies, an adsorbent and absorbent comparison was made. The acquired results show that as the concentration of the inhibitor increased, so did the values of inhibition efficiency ranged from 36.41to 93.71 %. The weight loss calculations showed that the corrosion rate of mild steel in H2SO4 media decreases with increasing the inhibitor concentration from 2.9766 to 0.1871 cm/yr. According to the thermodynamic characteristics, the adsorption was both physisorption and spontaneous. In contrast to earlier research, the adsorption was aggressive, and the Langmuir and Freundlich models fit the data the best. In general, mild steel materials can be efficiently protected against corrosion in H2SO4 solutions by using the CBWE inhibitor. As a result, a clean atmosphere and a possible corrective solution for the cigarette butts waste were given.