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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Rocha, S. D. F. Lagno, F. Demopoulos, G. P. Chryssoulis, S. |
| Description | Country affiliation: Canada Author Affiliation: Lagno F ( Department of Mining and Materials Engineering, McGill University, Montreal, QC, Canada.) |
| Abstract | A new stabilization process for scorodite (FeAsO(4).2H(2)O) solids based on the concept of encapsulation by controlled deposition of mineral coatings immune to pH or redox potential variations is described. The stability of the encapsulated scorodite with aluminum phosphates under simulated anoxic and oxic environments is demonstrated. Encapsulation experiments were carried out at 95 degrees C using 50 g/L scorodite in acidic sulphate solution containing 0.16 mol/L of P(V) with Al(III) to P(V) molar ratio of 1 and precipitation pH of 1.7. The encapsulated particles were characterised by XRD, SEM, TOF-SIMS and TOF-LIMS. The coating was crystalline AlPO(4).1.5H(2)O ranging in thickness from 2.5 to 3.5 microm. Encapsulation of scorodite particles with hydrated aluminum phosphate appears to be effective in controlling/suppressing the release of arsenic under both oxic and anoxic conditions by more than one order of magnitude. |
| ISSN | 03043894 |
| Issue Number | 1-3 |
| Volume Number | 181 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-09-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Aluminum Compounds Arsenicals Isolation & Purification Capsules Chemistry Phosphates Hydrogen-ion Concentration Anoxia Oxygen Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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