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Coal fly ash and synthetic coal fly ash aggregates as reactive media to remove zinc from aqueous solutions.
J Hazard Mater. 2009 May 15; 164(1):235-46.JH

Abstract

Coal fly ash (CF) and synthetic coal fly ash aggregates (SCFAs) were evaluated as low-cost reactive media for the remediation of groundwater contaminated with Zn. The SCFAs were prepared by mixing CF, sodium silicate, and deionized (DI) water. Serial batch kinetic and static tests were conducted on both CF and SCFAs, under various conditions (i.e., pH, initial Zn concentration, reaction time, and solid dosage), using Zn(NO(3))(2).6H(2)O solutions. Serial column tests were also conducted on both CF and SCFAs. The final rather than the initial pH of the solution had a greater effect on the removal of Zn. At pH>7.0, the removal of Zn was due to precipitation, whereas at <7.0, the removal of Zn was due to adsorption onto the reactive media. The removal of Zn increased with increasing dosage of the reactive medium and decreasing initial Zn concentration. The results of the column and batch tests were comparable. Preferential flow paths were observed with CF, but not SCFA. The hydraulic conductivity of CF was more significantly decreased than that of SCFA with increasing dry density of the specimen.

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Authors+Show Affiliations

Hong JK
Department of Earth and Environmental Sciences, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea.
Jo HY
No affiliation info available
Yun ST
No affiliation info available

MeSH

AdsorptionCarbonCoal AshHydrogen-Ion ConcentrationKineticsParticulate MatterWater Pollutants, ChemicalWater PurificationZinc

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18805638

Citation

Hong, Jung-Ki, et al. "Coal Fly Ash and Synthetic Coal Fly Ash Aggregates as Reactive Media to Remove Zinc From Aqueous Solutions." Journal of Hazardous Materials, vol. 164, no. 1, 2009, pp. 235-46.
Hong JK, Jo HY, Yun ST. Coal fly ash and synthetic coal fly ash aggregates as reactive media to remove zinc from aqueous solutions. J Hazard Mater. 2009;164(1):235-46.
Hong, J. K., Jo, H. Y., & Yun, S. T. (2009). Coal fly ash and synthetic coal fly ash aggregates as reactive media to remove zinc from aqueous solutions. Journal of Hazardous Materials, 164(1), 235-46. https://doi.org/10.1016/j.jhazmat.2008.08.001
Hong JK, Jo HY, Yun ST. Coal Fly Ash and Synthetic Coal Fly Ash Aggregates as Reactive Media to Remove Zinc From Aqueous Solutions. J Hazard Mater. 2009 May 15;164(1):235-46. PubMed PMID: 18805638.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Coal fly ash and synthetic coal fly ash aggregates as reactive media to remove zinc from aqueous solutions. AU - Hong,Jung-Ki, AU - Jo,Ho Young, AU - Yun,Seong-Taek, Y1 - 2008/08/13/ PY - 2008/03/14/received PY - 2008/08/06/revised PY - 2008/08/06/accepted PY - 2008/9/23/pubmed PY - 2009/7/25/medline PY - 2008/9/23/entrez SP - 235 EP - 46 JF - Journal of hazardous materials JO - J Hazard Mater VL - 164 IS - 1 N2 - Coal fly ash (CF) and synthetic coal fly ash aggregates (SCFAs) were evaluated as low-cost reactive media for the remediation of groundwater contaminated with Zn. The SCFAs were prepared by mixing CF, sodium silicate, and deionized (DI) water. Serial batch kinetic and static tests were conducted on both CF and SCFAs, under various conditions (i.e., pH, initial Zn concentration, reaction time, and solid dosage), using Zn(NO(3))(2).6H(2)O solutions. Serial column tests were also conducted on both CF and SCFAs. The final rather than the initial pH of the solution had a greater effect on the removal of Zn. At pH>7.0, the removal of Zn was due to precipitation, whereas at <7.0, the removal of Zn was due to adsorption onto the reactive media. The removal of Zn increased with increasing dosage of the reactive medium and decreasing initial Zn concentration. The results of the column and batch tests were comparable. Preferential flow paths were observed with CF, but not SCFA. The hydraulic conductivity of CF was more significantly decreased than that of SCFA with increasing dry density of the specimen. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/18805638/Coal_fly_ash_and_synthetic_coal_fly_ash_aggregates_as_reactive_media_to_remove_zinc_from_aqueous_solutions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(08)01194-1 DB - PRIME DP - Unbound Medicine ER -