Natural source zone depletion of LNAPL: A critical review supporting modelling approaches

Kaveh Sookhak Lari, Greg B. Davis, John L. Rayner, Trevor P. Bastow, Geoffrey J. Puzon

Research output: Contribution to journalReview article

3 Citations (Scopus)

Abstract

Natural source zone depletion (NSZD) of light non-aqueous phase liquids (LNAPLs) includes partitioning, transport and degradation of LNAPL components. NSZD is being considered as a site closure option during later stages of active remediation of LNAPL contaminated sites, and where LNAPL mass removal is limiting. To ensure NSZD meets compliance criteria and to design enhanced NSZD actions if required, residual risks posed by LNAPL and its long term behaviour require estimation. Prediction of long-term NSZD trends requires linking physicochemical partitioning and transport processes with bioprocesses at multiple scales within a modelling framework. Here we expand and build on the knowledge base of a recent review of NSZD, to establish the key processes and understanding required to model NSZD long term. We describe key challenges to our understanding, inclusive of the dominance of methanogenic or aerobic biodegradation processes, the potentially changeability of rates due to the weathering profile of LNAPL product types and ages, and linkages to underlying bioprocesses. We critically discuss different scales in subsurface simulation and modelling of NSZD. Focusing on processes at Darcy scale, 36 models addressing processes of importance to NSZD are investigated. We investigate the capabilities of models to accommodate more than 20 subsurface transport and transformation phenomena and present comparisons in several tables. We discuss the applicability of each group of models for specific site conditions.

Original languageEnglish
Pages (from-to)630-646
Number of pages17
JournalWater Research
Volume157
DOIs
Publication statusPublished - 15 Jun 2019

Fingerprint

nonaqueous phase liquid
Liquids
modeling
partitioning
Weathering
Biodegradation
Remediation
Light sources
weathering profile
transport process
Degradation
compliance
biodegradation
remediation
degradation
prediction

Cite this

Sookhak Lari, K., Davis, G. B., Rayner, J. L., Bastow, T. P., & Puzon, G. J. (2019). Natural source zone depletion of LNAPL: A critical review supporting modelling approaches. Water Research, 157, 630-646. https://doi.org/10.1016/j.watres.2019.04.001
Sookhak Lari, Kaveh ; Davis, Greg B. ; Rayner, John L. ; Bastow, Trevor P. ; Puzon, Geoffrey J. / Natural source zone depletion of LNAPL : A critical review supporting modelling approaches. In: Water Research. 2019 ; Vol. 157. pp. 630-646.
@article{7e13581eafa8401a85084cd7be54b5c0,
title = "Natural source zone depletion of LNAPL: A critical review supporting modelling approaches",
abstract = "Natural source zone depletion (NSZD) of light non-aqueous phase liquids (LNAPLs) includes partitioning, transport and degradation of LNAPL components. NSZD is being considered as a site closure option during later stages of active remediation of LNAPL contaminated sites, and where LNAPL mass removal is limiting. To ensure NSZD meets compliance criteria and to design enhanced NSZD actions if required, residual risks posed by LNAPL and its long term behaviour require estimation. Prediction of long-term NSZD trends requires linking physicochemical partitioning and transport processes with bioprocesses at multiple scales within a modelling framework. Here we expand and build on the knowledge base of a recent review of NSZD, to establish the key processes and understanding required to model NSZD long term. We describe key challenges to our understanding, inclusive of the dominance of methanogenic or aerobic biodegradation processes, the potentially changeability of rates due to the weathering profile of LNAPL product types and ages, and linkages to underlying bioprocesses. We critically discuss different scales in subsurface simulation and modelling of NSZD. Focusing on processes at Darcy scale, 36 models addressing processes of importance to NSZD are investigated. We investigate the capabilities of models to accommodate more than 20 subsurface transport and transformation phenomena and present comparisons in several tables. We discuss the applicability of each group of models for specific site conditions.",
keywords = "Biodegradation, Contamination, LNAPL, Modelling, NSZD, Petroleum",
author = "{Sookhak Lari}, Kaveh and Davis, {Greg B.} and Rayner, {John L.} and Bastow, {Trevor P.} and Puzon, {Geoffrey J.}",
year = "2019",
month = "6",
day = "15",
doi = "10.1016/j.watres.2019.04.001",
language = "English",
volume = "157",
pages = "630--646",
journal = "Water Research",
issn = "0043-1354",
publisher = "Elsevier",

}

Natural source zone depletion of LNAPL : A critical review supporting modelling approaches. / Sookhak Lari, Kaveh; Davis, Greg B.; Rayner, John L.; Bastow, Trevor P.; Puzon, Geoffrey J.

In: Water Research, Vol. 157, 15.06.2019, p. 630-646.

Research output: Contribution to journalReview article

TY - JOUR

T1 - Natural source zone depletion of LNAPL

T2 - A critical review supporting modelling approaches

AU - Sookhak Lari, Kaveh

AU - Davis, Greg B.

AU - Rayner, John L.

AU - Bastow, Trevor P.

AU - Puzon, Geoffrey J.

PY - 2019/6/15

Y1 - 2019/6/15

N2 - Natural source zone depletion (NSZD) of light non-aqueous phase liquids (LNAPLs) includes partitioning, transport and degradation of LNAPL components. NSZD is being considered as a site closure option during later stages of active remediation of LNAPL contaminated sites, and where LNAPL mass removal is limiting. To ensure NSZD meets compliance criteria and to design enhanced NSZD actions if required, residual risks posed by LNAPL and its long term behaviour require estimation. Prediction of long-term NSZD trends requires linking physicochemical partitioning and transport processes with bioprocesses at multiple scales within a modelling framework. Here we expand and build on the knowledge base of a recent review of NSZD, to establish the key processes and understanding required to model NSZD long term. We describe key challenges to our understanding, inclusive of the dominance of methanogenic or aerobic biodegradation processes, the potentially changeability of rates due to the weathering profile of LNAPL product types and ages, and linkages to underlying bioprocesses. We critically discuss different scales in subsurface simulation and modelling of NSZD. Focusing on processes at Darcy scale, 36 models addressing processes of importance to NSZD are investigated. We investigate the capabilities of models to accommodate more than 20 subsurface transport and transformation phenomena and present comparisons in several tables. We discuss the applicability of each group of models for specific site conditions.

AB - Natural source zone depletion (NSZD) of light non-aqueous phase liquids (LNAPLs) includes partitioning, transport and degradation of LNAPL components. NSZD is being considered as a site closure option during later stages of active remediation of LNAPL contaminated sites, and where LNAPL mass removal is limiting. To ensure NSZD meets compliance criteria and to design enhanced NSZD actions if required, residual risks posed by LNAPL and its long term behaviour require estimation. Prediction of long-term NSZD trends requires linking physicochemical partitioning and transport processes with bioprocesses at multiple scales within a modelling framework. Here we expand and build on the knowledge base of a recent review of NSZD, to establish the key processes and understanding required to model NSZD long term. We describe key challenges to our understanding, inclusive of the dominance of methanogenic or aerobic biodegradation processes, the potentially changeability of rates due to the weathering profile of LNAPL product types and ages, and linkages to underlying bioprocesses. We critically discuss different scales in subsurface simulation and modelling of NSZD. Focusing on processes at Darcy scale, 36 models addressing processes of importance to NSZD are investigated. We investigate the capabilities of models to accommodate more than 20 subsurface transport and transformation phenomena and present comparisons in several tables. We discuss the applicability of each group of models for specific site conditions.

KW - Biodegradation

KW - Contamination

KW - LNAPL

KW - Modelling

KW - NSZD

KW - Petroleum

UR - http://www.scopus.com/inward/record.url?scp=85064459016&partnerID=8YFLogxK

U2 - 10.1016/j.watres.2019.04.001

DO - 10.1016/j.watres.2019.04.001

M3 - Review article

VL - 157

SP - 630

EP - 646

JO - Water Research

JF - Water Research

SN - 0043-1354

ER -