Fate and transport of phenol in a packed bed reactor containing simulated solid waste
- Department of Civil, Construction, and Environmental Engineering, Campus Box 7908, North Carolina State University, Raleigh, NC 27695-7908 (United States)
Highlights: Black-Right-Pointing-Pointer Anaerobic column experiments were conducted at 37 Degree-Sign C using a simulated waste mixture. Black-Right-Pointing-Pointer Sorption and biodegradation model parameters were determined from batch tests. Black-Right-Pointing-Pointer HYDRUS simulated well the fate and transport of phenol in a fully saturated waste column. Black-Right-Pointing-Pointer The batch biodegradation rate and the rate obtained by inverse modeling differed by a factor of {approx}2. Black-Right-Pointing-Pointer Tracer tests showed the importance of hydrodynamic parameters to improve model estimates. - Abstract: An assessment of the risk to human health and the environment associated with the presence of organic contaminants (OCs) in landfills necessitates reliable predictive models. The overall objectives of this study were to (1) conduct column experiments to measure the fate and transport of an OC in a simulated solid waste mixture, (2) compare the results of column experiments to model predictions using HYDRUS-1D (version 4.13), a contaminant fate and transport model that can be parameterized to simulate the laboratory experimental system, and (3) determine model input parameters from independently conducted batch experiments. Experiments were conducted in which sorption only and sorption plus biodegradation influenced OC transport. HYDRUS-1D can reasonably simulate the fate and transport of phenol in an anaerobic and fully saturated waste column in which biodegradation and sorption are the prevailing fate processes. The agreement between model predictions and column data was imperfect (i.e., within a factor of two) for the sorption plus biodegradation test and the error almost certainly lies in the difficulty of measuring a biodegradation rate that is applicable to the column conditions. Nevertheless, a biodegradation rate estimate that is within a factor of two or even five may be adequate in the context of a landfill, given the extended retention time and the fact that leachate release will be controlled by the infiltration rate which can be minimized by engineering controls.
- OSTI ID:
- 21612939
- Journal Information:
- Waste Management, Vol. 32, Issue 2; Other Information: DOI: 10.1016/j.wasman.2011.09.017; PII: S0956-053X(11)00423-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BIODEGRADATION
CONTROL
ENGINEERING
ENVIRONMENT
ERRORS
HEALTH HAZARDS
MIXTURES
PACKED BEDS
PHENOL
PUBLIC HEALTH
RETENTION
SANITARY LANDFILLS
SIMULATION
SOLID WASTES
SORPTION
TRANSPORT
AROMATICS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
HAZARDS
HYDROXY COMPOUNDS
MANAGEMENT
ORGANIC COMPOUNDS
PHENOLS
WASTE DISPOSAL
WASTE MANAGEMENT
WASTES