BRPI0700021A - method of manufacturing sol-gel activated alumina adsorbent spheres suitable for the adsorption and capture of heavy metals present at low concentrations in large volumes of industrial liquid effluents - Google Patents
method of manufacturing sol-gel activated alumina adsorbent spheres suitable for the adsorption and capture of heavy metals present at low concentrations in large volumes of industrial liquid effluentsInfo
- Publication number
- BRPI0700021A BRPI0700021A BRPI0700021A BRPI0700021A BR PI0700021 A BRPI0700021 A BR PI0700021A BR PI0700021 A BRPI0700021 A BR PI0700021A BR PI0700021 A BRPI0700021 A BR PI0700021A
- Authority
- BR
- Brazil
- Prior art keywords
- activated alumina
- heavy metals
- sol
- large volumes
- low concentrations
- Prior art date
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
MéTODO DE FABRICAçãO DE ESFERAS ABSORVENTES DE ALUMINA ATIVADA VIA PROCESSO SOL-GEL APROPRIADAS PARA A ADSORçãO E CAPTURA DE METAIS PESADOS PRESENTES EM BAIXAS CONCENTRAçõES EM GRANDES VOLUMES DE EFLUENTES LìQUIDOS INDUSTRIAIS. A presente invenção diz respeito a um método de fabricação de esferas adsorventes de alumina ativada, o qual se baseia no conhecido Processo Sol-Gel para imobilizar micropartículas (<243>38 <109>m) de alumina ativada, preferencialmente a fase <sym>-A1~ 2~O~ 3~, no formato esférico e colá-las com moléculas de álcool polivinílico (PVA) e com nanopartículas de bohemita (<244>-A1~ 2~O~ 3~.H~ 2~O), nanopartículas estas obtidas com auxílio de uma reação de transformação sol-gel à temperatura ambiente, em meio gasoso contendo NH~ 3~ e em um meio aquoso contendo NH~ 4~OH. As esferas de alumina ativada são obtidas com elevada esfericidade, resistência mecânica superior a 2 Kg/esfera, distribuição estreita de diâmetro, com diâmetro médio entre 1 mm e 5 mm, com boa estabilidade química em meios ácidos, básicos e neutros e com boa capacidade de absorver água sem levar a um inchamento destrutivo. Estas esferas são apropriadas para o tratamento alternativo de grandes volumes de rejeitos líquidos industriais contendo baixas concentrações de metais pesados, particularmente de Cd, Cu e Zn, já que elas podem ser obtidas industrialmente a baixo custo e com uma eficiência de remoção da ordem de 27%, 18%, 45% e 25% para Cd+Cu+Zn, Cd, Cu e Zn, respectivamente.METHOD FOR MANUFACTURING ALUMIN-ENABLED ALUMINUM BALLS ENABLED BY THE SOL-GEL PROCESS PROPERTY FOR THE ADSORING AND CATCHING OF HEAVY METALS LOW CONCENTRATIONS IN LARGE VOLUMES OF INDUSTRIAL EFFLUENT WATER. The present invention relates to a method of manufacturing activated alumina adsorbent spheres, which is based on the well-known Sol-Gel Process for immobilizing activated alumina microparticles (<386 m), preferably the <sym> phase. -A1 ~ 2 ~ O ~ 3 ~, in spherical shape and glue them with polyvinyl alcohol (PVA) molecules and bohemite nanoparticles (<244> -A1 ~ 2 ~ O ~ 3 ~ .H ~ 2 ~ O) These nanoparticles are obtained with the aid of a sol-gel transformation reaction at room temperature, in a gaseous medium containing NH 3 - and in an aqueous medium containing NH 4 - OH. Activated alumina spheres are obtained with high sphericity, mechanical strength greater than 2 kg / sphere, narrow diameter distribution, average diameter between 1 mm and 5 mm, with good chemical stability in acidic, basic and neutral media and with good capacity. absorb water without leading to destructive swelling. These spheres are suitable for the alternative treatment of large volumes of industrial liquid waste containing low concentrations of heavy metals, particularly Cd, Cu and Zn, as they can be obtained industrially at low cost and with a removal efficiency of around 27 ° C. %, 18%, 45% and 25% for Cd + Cu + Zn, Cd, Cu and Zn, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI0700021A BRPI0700021B1 (en) | 2007-01-10 | 2007-01-10 | method of manufacturing sol-gel activated alumina adsorbent spheres suitable for the adsorption and capture of heavy metals present at low concentrations in large volumes of industrial liquid effluents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI0700021A BRPI0700021B1 (en) | 2007-01-10 | 2007-01-10 | method of manufacturing sol-gel activated alumina adsorbent spheres suitable for the adsorption and capture of heavy metals present at low concentrations in large volumes of industrial liquid effluents |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| BRPI0700021A true BRPI0700021A (en) | 2008-08-26 |
| BRPI0700021B1 BRPI0700021B1 (en) | 2016-05-24 |
Family
ID=39708187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BRPI0700021A BRPI0700021B1 (en) | 2007-01-10 | 2007-01-10 | method of manufacturing sol-gel activated alumina adsorbent spheres suitable for the adsorption and capture of heavy metals present at low concentrations in large volumes of industrial liquid effluents |
Country Status (1)
| Country | Link |
|---|---|
| BR (1) | BRPI0700021B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019310B (en) * | 2021-03-30 | 2024-03-29 | 中国建筑设计研究院有限公司 | Alumina ball with activated alumina coated with building rubbish core aggregate and preparation method |
-
2007
- 2007-01-10 BR BRPI0700021A patent/BRPI0700021B1/en active IP Right Grant
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019310B (en) * | 2021-03-30 | 2024-03-29 | 中国建筑设计研究院有限公司 | Alumina ball with activated alumina coated with building rubbish core aggregate and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0700021B1 (en) | 2016-05-24 |
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| B03A | Publication of an application: publication of a patent application or of a certificate of addition of invention | ||
| B07A | Technical examination (opinion): publication of technical examination (opinion) | ||
| B09A | Decision: intention to grant | ||
| B16A | Patent or certificate of addition of invention granted |
Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 10/01/2007, OBSERVADAS AS CONDICOES LEGAIS. |
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