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American Journal of Innovative Research & Applied Sciences
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  | ARTICLES | Am. J. innov. res. appl. sci. Volume 5,  Issue 6, Pages 454-461 (December 2017)
Review Article
 
American Journal of innovative
Research & Applied Sciences 
ISSN  2429-5396 (Online)
OCLC Number: 920041286
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| DECEMBER | VOLUME 5 | N° 6  | 2017 |
Authors Contact

*Correspondant author and authors Copyright © 2017:

     | Tsihoarana H. Rakotoelson 1 | et | Mamiharijaona Ramaroson 1 |



Affiliation.

1 Université d’Antsiranana | Ecole Supérieure Polytechnique | Laboratoire de Métallurgie et Chimie | B.P. : O, 201, Antsiranana | Madagascar |
This article is made freely available as part of this journal's Open Access: ID |  Mamiharijaona-ManuscriptRef.1-ajira051217 |
ABSTRACT

Background: Eutrophication occurs in lakes and fresh water when total Phosphate (P) concentrations content exceeds 0.1 mg.L-1. Therefore, P- removal is an important procedure for water purification. In the last decades, adsorption is low-cost technology and one of best solutions for water and wastewater purification. Natural Syrian zeolitic ore (NSZO) gets more attention in Syria. Many researchers suggest NSZO as well-surfactant raw material to be used as promising fertilizer, and for removal of heavy metals and ammonium from drink and waste waters. Objectives: This Research aims to characterize NSZO and to study its efficiency in P- removal from water solutions. Methods: In order to identify the main characteristics of NSZO, XRD pattern analysis is carried out to point out main minerals in the natural ore. Batch experiment used to study P adsorption (removal) and factors that affect P- removal by NSZO. Results: XRD data identified Calcite, Quartz, and zeolite as the main components of NSZO, where Analcime and Phillipsite was the main zeolitic minerals. Otherwise, Phosphate sorption may attribute to Fe-OH sites in oxides components of NSZO, considering Fe(III) oxides content (181.4 g.Kg-1). P-removal increases between 100% and 70% as initial P concentration varies from 5 to 60 mg.L-1. Besides, All used adsorption models (Langmuir, Freundlich and Dubinin - Radushkevich) describe well adsorption as favorable mechanism (R2>0.9), other mechanisms like precipitation or even chemisorption may take place quietly slow. Conclusions. NSZO seemed to be a promising material for P- removal from water solutions. It is suggested that NSZO efficiency in P- removal is caused by zeolites, iron oxides and calcite.
Keywords: Phosphate, Removal efficiency, Analcime, Phillipsite .
COMPOSITE A BASE DE POUZZOLANE ET SCIURE DE BOIS

COMPOSITE BASED ON POUZZOLANE AND WOOD SAWDUST
     
      | Tsihoarana H. Rakotoelson 1 | et | Mamiharijaona Ramaroson |.  Am. J. innov. res. appl. sci. 2017; 5(6):454-461.

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| Received | 04 December  2017|          | Accepted | XX December 2017 |            | Published XX December 17 |