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Activated alumina

About: Activated alumina is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 31090 citations.


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Journal ArticleDOI
TL;DR: In this article, an experimental investigation on the performance of radial flow desiccant bed using activated alumina has been carried out, and the experimental tests were carried out at different conditions of inlet air and initial bed parameters.

30 citations

Journal ArticleDOI
TL;DR: In this paper, ultrasonic waves effectively break the agglomerates in the suspension so that the UAH particles are fine and have a beneficial phase constituent, and the residual aluminum concentration in aqueous solution after defluoridation by Al(OH)3 was found to be one order of magnitude lower than that obtained with activated alumina which is below the World Health Organization (WHO) guideline for aluminum (0.2 mg L−1) in drinking water.
Abstract: Different Al(OH)3 powders were used as adsorbents for fluoride removal from water. The results showed that the defluoridation performance of ultrasonically prepared Al(OH)3 (UAH) is much better than that of commercially available Al(OH)3 and is comparable to that of activated alumina, because the ultrasonic waves effectively break the agglomerates in the suspension so that the UAH particles are fine and have a beneficial phase constituent. Furthermore, the residual aluminum concentration in aqueous solution after defluoridation by Al(OH)3 was found to be one order of magnitude lower than that obtained with activated alumina which is below the World Health Organization (WHO) guideline for aluminum (0.2 mg L−1) in drinking water. The defluoridation dynamics and mechanism for UAH are discussed in detail.

30 citations

Journal ArticleDOI
TL;DR: A metal-organic framework adsorbent (MIL-96(Al)) with the granular structure of rice, which was generated by hydrothermal reaction was presented in this article.
Abstract: Long-term consumption of drinking water that contains excessive amounts of fluoride can endanger human health; therefore, the preparation and application of a high-efficiency defluorination adsorbent for advanced purification of drinking water are of significant interest. This study presents a metal-organic framework adsorbent (MIL-96(Al)) with the granular structure of rice, which was generated by hydrothermal reaction. The specific surface area of MIL-96(Al) was ~220 m2 g-1, and it showed a good thermal stability. Several experiments were conducted wherein conditions, including adsorbent dosage, initial concentration, pH, and coexisting anions, were varied to understand the defluorination performance of the material. Results showed that pH (6–9) and coexisting anions had little effect on the removal efficiency of fluoride. The adsorption isotherm can be described by the Langmuir model, and the theoretical fluoride adsorption capacity of MIL-96(Al) was up to 42.19 mg Fg-1 at 298 K, which is much higher than that of the commonly used activated alumina. The adsorption process of fluoride is endothermic and follows pseudo second-order kinetics. In addition, MIL-96(Al) was shown to still achieve ~61.8% of the adsorption capacity after seven regenerations. This study shows that MIL-96(Al) is a good application prospect and could be widely used to remove fluoride from water.

30 citations

Journal ArticleDOI
TL;DR: A P1 type Shirasu-zeolite (SZP1) was treated with an aluminium sulfate solution, and thus an aluminium-loaded SZP 1 (Al-SZp1), which was used as an adsorbent, was examined in this article.
Abstract: A P1 type Shirasu-zeolite (SZP1) was treated with an aluminium sulfate solution, and thus an aluminium-loaded SZP1 (Al-SZP1) was prepared. By use of Al-SZP1 as an adsorbent, the adsorption of As(V) was examined. The Al-SZP1 was superior to an activated alumina and other aluminium-loaded zeolites in terms of the adsorption ability for As(V).

29 citations

PatentDOI
TL;DR: In this article, a NO x removal catalyst resistant to high temperatures, comprising an activated alumina wherein the specific surface area measured by the nitrogen adsorption method is 120 m 2 /g or more, the bulk density measuring by the mercury porosimetry is 0.60 g/cm 3 or more and the skeleton density measured by a mercury-porosimetric is 1.80 g/ cm 3 or less and silver carried on said activated aluminina.
Abstract: A NO x removal catalyst resistant to high temperatures, comprising an activated alumina wherein the specific surface area measured by the nitrogen adsorption method is 120 m 2 /g or more, the bulk density measured by the mercury porosimetry is 0.60 g/cm 3 or more, and the skeleton density measured by the mercury porosimetry is 1.80 g/cm 3 or less and silver carried on said activated alumina. When said catalyst or a structure having said catalyst coated on a substrate is brought in contact with exhaust gas from an internal combustion engine that is operated at a lean fuel/air ratio, such as a lean-burn engine, NO x can be removed efficiently within a quite short contact time.

29 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237
202218
202118
202031
201941
201839