Topic
Activated alumina
About: Activated alumina is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 31090 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: A flow injection system incorporating a micro-column of activated alumina was used in conjunction with flame atomic absorption spectrometry for the pre-concentration and determination of lead in drinking waters.
Abstract: A flow injection system incorporating a micro-column of activated alumina was used in conjunction with flame atomic absorption spectrometry for the pre-concentration and determination of lead in drinking waters. The analyte was deposited on the alumina micro-column (basic form of alumina) during the sampling stage and elution was effected by injection of nitric acid (250 µl, 2 M). The procedure was successfully applied to a range of water samples and the accuracy was assessed through recovery experiments, the analysis of a certified reference water and by independent analyses by inductively coupled plasma mass spectrometry. The limit of detection based on a sample volume of 25 ml (sampling time 5 min at 5 ml min–1) was 0.36 µg l–1 and the relative standard deviations at 40 and 4 µg l–1 were 1.4 and 12%, respectively.
55 citations
TL;DR: In this article, the authors investigated the effect of bicarbonate ions on the sorption behavior of fluoride on activated alumina, between simple sodium fluoride solutions and multicomponent groundwater samples with high alkalinity.
54 citations
54 citations
TL;DR: In this article, high-stable activated alumina/LiCl composites with multistage sorption process were fabricated to store low-temperature heat below 120°C.
54 citations
TL;DR: In this paper, the authors used hydrogen peroxide plus formic acid as the oxidant, activated carbon as a reaction enhancer, and power ultrasound for phase dispersion of jet and diesel fuels.
Abstract: The oxidative desulfurization (ODS) of jet and diesel fuels was studied using hydrogen peroxide plus formic acid as the oxidant, activated carbon as a reaction enhancer, and power ultrasound for phase dispersion. When the ODS treatment is followed by an activated alumina post-processing step, overall sulfur removal performance was 98% for JP-8 (at pH 1.4), 94% for diesel (at pH 1.5), and >88% for ultralow-sulfur diesel (at pH 1.5). The ODS treatment converts sulfur compounds to sulfones/sulfoxides, and activated alumina removes the oxidized sulfur compounds to yield a low-sulfur fuel. Control tests reveal that removal of any of the four reaction components (ultrasound, carbon, hydrogen peroxide, and formic acid) reduces the ODS removal performance, with hydrogen peroxide being the most crucial. The response of ODS removal performance to initial oxidant concentrations is consistent with performic acid, formed in situ from hydrogen peroxide and formic acid, being the active oxidizing species. Power ultrasou...
54 citations