Leaching kinetics of As, Mo, and Se from acidic coal fly ash samples
Abstract
Annually, coal-fired electric power plants produce large volumes potentially hazardous coal combustion products (CCPs) including fly ash. Since majority of the coal fly ash and other CCPs deposited in dry land fills or wet lagoons, they pose risk of contamination to local environment and hydrogeology. In this study, we present results of leaching kinetics for As, Mo, and Se from three acidic fly ash samples. This study shows that the leachate concentrations of As, Mo, and Se increase over time. Three kinetics equations, pseudo-second order, Elovich, and power-function, are able to adequately describe the experimental leaching kinetics data. Experimental leaching data and modeling results indicate that the rate limiting leaching of As, Mo, and Se is largely controlled by the dissolution of the fly ash particles. Furthermore, it is important to adopt effective containment/treatment schemes to avoid potential and persistent dispersion of trace elements from ash disposal facilities to surrounding environment for a long time.
- Authors:
-
- Idaho National Lab. (INL), Idaho Falls, ID (United States); Center for Advanced Energy Studies, Idaho Falls, ID (United States)
- Univ. of Alabama, Tuscaloosa, AL (United States)
- Univ. of Arizona, Tucson, AZ (United States)
- Publication Date:
- Research Org.:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1372791
- Report Number(s):
- INL/JOU-15-37424
Journal ID: ISSN 1945-3094
- Grant/Contract Number:
- AC07-05ID14517
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Water Resource and Protection
- Additional Journal Information:
- Journal Volume: 09; Journal Issue: 08; Journal ID: ISSN 1945-3094
- Publisher:
- Scientific Research Publishing, Inc.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; coal fly ash; arsenic; molybdenum; selenium; kinetics; leaching
Citation Formats
Neupane, Ghanashyam, Donahoe, Rona J., Bhattacharyya, Siddhartha, and Dhakal, Prakash. Leaching kinetics of As, Mo, and Se from acidic coal fly ash samples. United States: N. p., 2017.
Web. doi:10.4236/jwarp.2017.98060.
Neupane, Ghanashyam, Donahoe, Rona J., Bhattacharyya, Siddhartha, & Dhakal, Prakash. Leaching kinetics of As, Mo, and Se from acidic coal fly ash samples. United States. https://doi.org/10.4236/jwarp.2017.98060
Neupane, Ghanashyam, Donahoe, Rona J., Bhattacharyya, Siddhartha, and Dhakal, Prakash. Mon .
"Leaching kinetics of As, Mo, and Se from acidic coal fly ash samples". United States. https://doi.org/10.4236/jwarp.2017.98060. https://www.osti.gov/servlets/purl/1372791.
@article{osti_1372791,
title = {Leaching kinetics of As, Mo, and Se from acidic coal fly ash samples},
author = {Neupane, Ghanashyam and Donahoe, Rona J. and Bhattacharyya, Siddhartha and Dhakal, Prakash},
abstractNote = {Annually, coal-fired electric power plants produce large volumes potentially hazardous coal combustion products (CCPs) including fly ash. Since majority of the coal fly ash and other CCPs deposited in dry land fills or wet lagoons, they pose risk of contamination to local environment and hydrogeology. In this study, we present results of leaching kinetics for As, Mo, and Se from three acidic fly ash samples. This study shows that the leachate concentrations of As, Mo, and Se increase over time. Three kinetics equations, pseudo-second order, Elovich, and power-function, are able to adequately describe the experimental leaching kinetics data. Experimental leaching data and modeling results indicate that the rate limiting leaching of As, Mo, and Se is largely controlled by the dissolution of the fly ash particles. Furthermore, it is important to adopt effective containment/treatment schemes to avoid potential and persistent dispersion of trace elements from ash disposal facilities to surrounding environment for a long time.},
doi = {10.4236/jwarp.2017.98060},
journal = {Journal of Water Resource and Protection},
number = 08,
volume = 09,
place = {United States},
year = {Mon Jul 03 00:00:00 EDT 2017},
month = {Mon Jul 03 00:00:00 EDT 2017}
}
Search WorldCat to find libraries that may hold this journalWorks referencing / citing this record:
Speciation of major and trace elements leached from coal fly ash and the kinetics involved
journal, July 2019
- Hailu, Solomon L.; McCrindle, Robert I.; Seopela, Mathapelo P.
- Journal of Environmental Science and Health, Part A, Vol. 54, Issue 12