Preparation of Some Eco‐friendly Corrosion Inhibitors Having Antibacterial Activity from Sea Food Waste

Abstract

Chitosan is one of the important biopolymers and it is extracted from exoskeletons of crustaceans in sea food waste. It is a suitable eco-friendly carbon steel corrosion inhibitor in acid media; the deacetylation degree of prepared chitosan is more than 85.16 %, and the molecular weight average is 109 kDa. Chitosan was modified to 2-N,N-diethylbenzene ammonium chloride N-oxoethyl chitosan (compound I), and 12-ammonium chloride N-oxododecan chitosan (compound II) as soluble water derivatives. The corrosion inhibition efficiency for carbon steel of compound (I) in 1 M HCl at varying temperature is higher than for chitosan and compound (II). However, the antibacterial activity of chitosan for Enterococcus faecalis, Escherichia coli, Staphylococcus aureus, and Candida albicans is higher than for its derivatives, and the minimum inhibition concentration and minimum bacterial concentration of chitosan and its derivatives were carried out with the same strain.

High pressure extraction and its application in the extraction of bio‐active compounds: A review

“…Such as shrimp waste, which contains a rich content of chitin and astaxanthin (De Holanda and Netto ). Astaxanthin (3,30‐dihydroxy‐b,b0‐carotene‐4,40‐dione), mainly found in aquatic organisms, such as shrimp, lobster and salmon is a lipophilic carotenoid which belongs to xanthophyll family and is considered as a good pigmentation material (Diaz Rojas et al, ; Hussein, El‐Hady, Shehata, Hegazy, & Hefni, ). Diaz Rojas et al, 2006, carried out studies to determine the astaxanthin content in shrimp and crab waste and found it in between 119 and 148.l μg/g which is considered a rich source.…”

Experimental and theoretical studies of xanthan gum and its graft co-polymer as corrosion inhibitor for mild steel in 15% HCl

“…H + diffusion to the metal surface increases with the temperature and this increases the corrosion rate. The adsorbed hydrogen atoms block the cathodic area at lower temperatures, whereas higher solution temperature disrupts hydrogen adsorption and results in higher cathodic surface area leading to increased corrosion rate [20]. The apparent activation energy (E a ), activation enthalpy ( H a ) and activation entropy ( S a ) were calculated from the Arrhenius plot and Transition state plot of mild steel in 15% HCl with and without both inhibitors [21].…”

The Control of Microbiological Problems∗∗Some excerpts taken from Bajpai P (2012). Biotechnology for Pulp and Paper Processing with kind permission from Springer Science1Business Media.

“…The results also revealed that performance was improved by using titanium-based implants, even at very low concentrations. Hussein et al (2013) produced chitosan (a biopolymer), by extracting the exoskeletons of crustaceans found in seafood waste. It was 85.2% deacetylated and had an average molecular weight of 109 kDa.…”