Virtuous cycle of destruction and total recycling of pure asbestos and asbestos-containing waste
| Autor: | O. Cambon, G. Talbi, M. Cambon |
|---|---|
| Přispěvatelé: | Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2019 |
| Předmět: |
Precipitation (chemistry)
0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences medicine.disease_cause Pulp and paper industry 01 natural sciences Asbestos chemistry.chemical_compound chemistry Mechanics of Materials Hazardous waste Nitric acid Sodium hydroxide Basic solution Chrysotile [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] medicine 021108 energy Zeolite Waste Management and Disposal ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Journal of Material Cycles and Waste Management Journal of Material Cycles and Waste Management, Springer Verlag (Germany), 2019, ⟨10.1007/s10163-019-00870-0⟩ |
| ISSN: | 1611-8227 1438-4957 |
| Popis: | At the present time, hazardous waste management is a major problem, like the waste containing asbestos. The development of a process for eradicating all types of asbestos waste is a real challenge. In this study, several usefully analysis techniques (XRD, SEM–EDX, and TEM) have been used to determine what kind of asbestos is present in the waste (amphiboles and/or chrysotile). The chrysotile-containing wastes were treated with nitric acid solution (HNO3) leading to obtain pure silica and an acidic solution. Alkaline treatment using sodium hydroxide (NaOH) was also used in the case of waste-containing amphiboles. A basic solution of silica was then obtained. Finally a first valorization route was proposed with the precipitation of the ions dissolved in the acid solution and a second with the synthesis of a zeolite using the solid silica resulting from the acid treatment and the solution coming from the alkaline treatment of the amphiboles as sources of silicon. This paper describes the implementation of a complete process adapted to chemically dissolve each type of waste (according to their composition, density and fiber content) and to transform or recover all the by-products of the process. |
| Databáze: | OpenAIRE |
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