Fenton’s degradation of toluene using chelating and emulsifying surfactants

Earnden, Laura; Laredo, Thamara; Marangoni, Alejandro G.; Pensini, Erica

doi:10.1007/s13762-021-03708-1

Cited by 2 publications

(2 citation statements)

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“…Importantly, the hydrophilic head also plays a key role in surfactant binding to metal surfaces. Our recently published studies showed that SLL could bind copper or iron ions to create hydrophobic oil‐soluble complexes, dissimilar to SDS or SCG (Earnden et al, 2021; Pensini et al, 2021). These results suggest that SLL could bind iron at the carbon steel surfaces and hydrophobize them more effectively than either SDS or SCG, as hypothesized above.…”

Section: Resultsmentioning

confidence: 99%

“…While our study shows that SLL can bind metal ions, it was not previously used to inhibit the corrosion of metal surfaces (e.g., carbon steel). SCG was selected because our study showed that addition of SCG to FeSO 4 solutions caused a rapid color change from light green to brown, suggesting that it could also bind iron ions (Earnden et al, 2021). SDS was selected because it is a very common surfactant, and because it was used as corrosion inhibitor in previous studies, albeit in conjunction with other surfactants or after modification (P. Han et al, 2018; Mobin et al, 2017; Tan et al, 2020; Yousefi et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of corrosion inhibition by three anionic surfactants in an acidic environment

Earnden

Zalm

Chen

et al. 2021

J Surfact & Detergents

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Corrosion in carbon steel units of chemical, petrochemical and oil and gas plants poses safety and economic concerns. The goal of our study is to investigate the corrosion inhibition effectiveness of an environmentally benign surfactant, namely sodium lauroyl lactylate (SLL), in comparison to sodium cocoyl glutamate (SCG) and sodium dodecyl sulfate (SDS). The corrosion of carbon steel in 1 M HCl was markedly inhibited by 0.05 and 0.1 M of the anionic surfactant SLL, as determined from weight loss over 96 h, at ambient conditions. X-ray photoelectron spectroscopy (XPS) showed that SLL adsorbed at the carbon steel surface, forming a protective film that decreased corrosion. Scanning electron microscopy (SEM) showed that carbon steel surfaces immersed in 1 M HCl for 96 h had an etched appearance without SLL, whereas they retained their smoothness with 0.1 M SLL. Electrochemical impedance spectroscopy (EIS) measurements confirmed that SLL passivated carbon steel surfaces, markedly increasing the polarization resistance R p from ≈95 to ≈20,694 Ω cm 2 over a 12 h period. In contrast, without SLL, R p decreased from ≈92 to ≈12 Ω cm 2 . These results demonstrate for the first time that the environmentally friendly surfactant SLL is an efficient corrosion inhibitor in extreme environments such as 1 M HCl solutions. Dissimilar to SLL, SCG and SDS were not effective in inhibiting corrosion.

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Section: Resultsmentioning

confidence: 99%