PMID: 11902159Mar 21, 2002Paper

Humic acid enhanced remediation of an emplaced diesel source in groundwater. 2. Numerical model development and application

Journal of Contaminant Hydrology
J W MolsonS Lesage

Abstract

A pilot scale experiment for humic acid-enhanced remediation of diesel fuel, described in Part 1 of this series, is numerically simulated in three dimensions. Groundwater flow, enhanced solubilization of the diesel source, and reactive transport of the dissolved contaminants and humic acid carrier are solved with a finite element Galerkin approach. The model (BIONAPL) is calibrated by comparing observed and simulated concentrations of seven diesel fuel components (BTEX and methyl-, dimethyl- and trimethylnaphthalene) over a 1500-day monitoring period. Data from supporting bench scale tests were used to estimate contaminant-carrier binding coefficients and to simulate two-site sorption of the carrier to the aquifer sand. The model accurately reproduced the humic acid-induced 10-fold increase in apparent solubility of trimethylnaphthalene. Solubility increases on the order of 2-5 were simulated for methylnaphthalene and dimethylnaphthalene, respectively. Under the experimental and simulated conditions, the residual 500-ml diesel source was almost completely dissolved and degraded within 5 years. Without humic acid flushing, the simulations show complete source dissolution would take about six times longer.

Citations

Apr 4, 2015·Journal of Environmental Health Science & Engineering·Masoumeh RavanipourSamireh Hashemi-Najafabadi
Sep 12, 2008·Journal of Biological Engineering·Yanna LiangRonald C Sims
Oct 17, 2014·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Mahmoud D Eljack, Abul Hussam
May 22, 2007·Chemosphere·Motoki TerashimaMasami Fukushima
Mar 15, 2006·Bioprocess and Biosystems Engineering·M Alvarez CuencaS R Upreti
Dec 8, 2015·Journal of Environmental Quality·César García-DíazRafael Martínez-Palou
Nov 6, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Nicholas A ValleyGeraldine L Richmond
Jun 22, 2006·Environmental Science & Technology·Sandra RussoldKristin Schirmer
Sep 28, 2010·Journal of Contaminant Hydrology·Juliana G FreitasJames F Barker

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