Inhibition of Mild Steel Corrosion in 1M Hydrochloric Medium by the cherimoya seeds

In the present study, the inhibition performance of mild steel by cherimoya seeds extract was investigated using weight loss measurements, electrochemical techniques, and scanning electron microscope (SEM) coupled with energy‐dispersive X‐ray spectroscopy (EDX). The experimental data suggested that the cherimoya seeds exhibited a high inhibition performance, which increases with increasing their concentrations. Cherimoya seeds extract present maximum inhibition efficiency of 94%  at an optimal concentration of 1g/L. The principal observations that resulted from electrochemical studies are that cherimoya seeds affected both anodic and cathodic reactions (mixed inhibitors). Their adsorption, which is a combination of chemisorption and physisorption, obeyed the Langmuir isotherm model. Furthermore, the temperature effect was carried out at various temperatures ranging from 303 to 328 K to verify the corrosion inhibition performance of cherimoya seeds at higher temperatures. Moreover, SEM‐EDX analysis confirmed that cherimoya seeds can ensure remarkable prevention against corrosion through the adsorption onto the metal surface

Disappearance of Azoxystrobin and difenoconazole in green beans cultivated in Souss Massa valley (Morocco)

A study was undertaken to evaluate the degradation behavior and residue levels of azoxystrobin and difenoconazole in Belma green beans variety grown in an experimental plastic greenhouse. The measurements were made over a 3 week period in which up to two successive treatments with azoxystrobin and a 5 week period in which up to two successive treatments with difenoconazole were carried out. Residue levels of dicofol and difenoconazole were determined by Gas chromatography with electron capture detection (GC-ECD), liquid-liquid extraction (LLE), solid phase extraction (SPE) and high-performance liquid chromatography (HPLC). During the study, residue levels in the plantation ranged between 0.35 and 0.01 mg/kg for azoxystrobin and between 0.25 and 0.01 mg/kg for difenoconazole. The residual concentrations after the preharvest intervals (PHI) were below the legal limits