Arsenic and selenium removal from fly ash leachate

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Water Environment and Technology

OSTI ID:121716

Yodnane, P; Patelunas, G M; Niece, J E ^[1]

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1. GAI Consultants, Inc., Monroeville, PA (United States)

A bench-scale study of fly ash leachate evaluated the potential for iron coprecipitation and activated alumina adsorption to meet National Pollution Discharge Elimination System (NPDES) limits for arsenic and selenium. Study results showed that arsenic can be removed effectively from fly ash leachate in the laboratory by both iron coprecipitation and activated alumina. Both processes required careful control to remove selenium. For activated alumina treatment, the batch studies empolyed three mesh sizes of activated alumina. All three mesh sizes provided effluent well below the required limit for arsenic. However, only the 80x200 mesh test met the selenium limit. The continuous flow testing showed good results for arsenic,and selenium concentrations were very close to the permit limit. The results of the study provide a prediction of effluent quality and also provide information for conceptual design parameters. Detailed pilot studies will be needed to better define the design parameters.

• OSTI ID: 121716
• Journal Information: Water Environment and Technology, Journal Name: Water Environment and Technology Journal Issue: 7 Vol. 4; ISSN 1044-9493; ISSN WAETEJ
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR POLLUTION CONTROL
ARSENIC
COPRECIPITATION
FEASIBILITY STUDIES
FLY ASH
IRON
REMOVAL
SELENIUM