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Titre du document / Document title

Application of coal ash to environmental improvement. Transformation into zeolite, potassium fertilizer, and FGD absorbent

Auteur(s) / Author(s)

KIKUCHI R. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Environmental Protection, B-bldg., No.128, Faculty of Agriculture and Forestry, P.O.Box 27 (Viikki), University of Helsinki, 00014, Helsinki, FINLANDE

Résumé / Abstract

The rapid increase in population and economic growth have led to an increase in energy demand. Coal reserves are distributed worldwide, and coal is now known to be the most stable and available energy source. However, utilization of coal as an energy source involves the generation of a great amount of coal ash, and the recycling rate of the ash is rather low. Coal ash is mainly used in civil construction materials, and there is a limit to the demand for coal ash by construction industries: therefore, the increasing amount of coal ash will be a serious problem in the near future. Different applications should be considered. In this paper, three environmentally-friendly methods for coal ash recycling are described. Firstly, alkali treatment can transform coal ash to zeolite, which is used in deodorant and for wastewater treatment and soil improvement. Secondly, potassium silicate fertilizer is produced from coal ash and has a higher retentivity in the soil than that of conventional fertilizers. Thirdly, emission of sulfur dioxide is controlled by flue gas desulfurization using coal ash. It is considered that environmentally-friendly use of coal ash is important from the viewpoints of energy, economy, and environmental strategy in order to realize the concept of sustainable development.

Revue / Journal Title

Resources, conservation and recycling    ISSN  0921-3449 

Source / Source

1999, vol. 27, no4, pp. 333-346 (25 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1988) (Revue)

Mots-clés anglais / English Keywords

Solid waste

;

Fly ash

;

Coal

;

Upgrading

;

Waste reuse

;

Raw materials

;

Preparation

;

Molecular sieve

;

Zeolite

;

Potash fertilizer

;

Sorbent

;

Flue gas purification

;

Physicochemical purification

;

Desulfurization

;

Scrubbing

;

Sulfur dioxide

;

Mots-clés français / French Keywords

Déchet solide

;

Cendre volante

;

Charbon

;

Valorisation

;

Réutilisation déchet

;

Matière première

;

Préparation

;

Tamis moléculaire

;

Zéolite

;

Engrais potassique

;

Sorbant

;

Epuration effluent gazeux

;

Epuration physicochimique

;

Désulfuration

;

Lavage gaz

;

Soufre dioxyde

;

Mots-clés espagnols / Spanish Keywords

Residuos sólidos

;

Polvillo ceniza

;

Carbón

;

Valorización

;

Reutilización desperdicios

;

Materia prima

;

Preparación

;

Tamiz molecular

;

Zeolita

;

Fertilizante potásico

;

Sorbente

;

Depuración efluente gaseoso

;

Depuración fisicoquímica

;

Desulfuración

;

Dióxido sulfúrico

;

Localisation / Location

INIST-CNRS, Cote INIST : 16839, 35400008823453.0040

Nº notice refdoc (ud4) : 1970649



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