In this study, we examined the effects of temperature, heat treatment which were heated in oven for an hour in 200 ℃, and solvent on the adsorption isotherm for thymol and benzoic acid on the three surfaces (modified calcium carbonate, silica gel, and perlite). For the first effect, the adsorption isotherm for benzoic acid on modified calcium carbonate was determined at temperatures of 25, 35, 45 and 55 ℃ in ethanol solvent. While for the last two effects, the adsorption isotherm for ethanol, acetonitrile, and n-heptane solutions wasdetermined at 25 ℃. UV-spectrophotometer measurements have been conducted todetermine the amount of adsorbed. The main purpose of this project is to examine the antimicrobial substances benefits which prolong food shelf life. However, it’s better to place those substances in so called food pads than to add it directly to the food. That certainly reduces the bacterial growth in the food pads. A grater amount of thymol was found to be adsorbed in n-heptane than the other solutions, additionally, a greater amount of benzoic acid was seen in ethanol than it was in acetonitrile or n-heptane. Sometimes the adsorption capacity has a large effect during heat treatment, while other times it has a small effect. The study also showed that the amount of benzoic acid adsorbed on modified calcium carbonate increases as temperature decreases
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:kau-90942 |
| Date | January 2022 |
| Creators | Sukkar, Hiam |
| Publisher | Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper (from 2013) |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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