Impacts of LNAPL types on mechanisms and rate of natural source zone depletion

Guan, Junjie; Li, Chong; Yu, Wang; Wei, Guo; Kang, Rifeng; Pang, Hongwei; McHugh, Thomas; Ma, Jie

doi:10.1016/j.envpol.2024.124380

Environmental Pollution

2024

DOI: 10.1016/j.envpol.2024.124380

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Impacts of LNAPL types on mechanisms and rate of natural source zone depletion

Junjie Guan,

Chong Li,

Wang Yu

et al.

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2024

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Increasing density and viscosity of light non-aqueous phase liquids are indicators of natural source zone depletion

Smith,

Hinojosa,

Hill

2024

QJEGH

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Natural source zone depletion (NSZD) acts to reduce the mass and/or toxicity of light non-aqueous phase liquids (LNAPL) in the shallow subsurface. Several indirect measurement techniques are commonly used to estimate LNAPL mass depletion based on CO 2 generation by hydrocarbon mineralisation, heat production by exothermic biodegradation processes, and sub-surface gas concentration gradients. This paper presents data on LNAPL density and viscosity and shows changes that result from NSZD processes. Increasing trends in LNAPL density and viscosity were observed that provided a qualitative line-of-evidence for NSZD. When LNAPL density and viscosity were combined with contemporaneous LNAPL chemistry analysis it was possible to correlate changes in the physical properties to depletion of alkanes from the LNAPL in a manner that would inform a quantitative NSZD assessment. LNAPL density and viscosity measurements are relatively cheap and reproducible, and increasing trends in LNAPL density and viscosity provide additional lines-of-evidence for NSZD.

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Increasing density and viscosity of light non-aqueous phase liquids are indicators of natural source zone depletion

Smith,

Hinojosa,

Hill

2024

QJEGH

View full text Add to dashboard Cite

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Impacts of LNAPL types on mechanisms and rate of natural source zone depletion

Cited by 1 publication

References 27 publications

Increasing density and viscosity of light non-aqueous phase liquids are indicators of natural source zone depletion

Increasing density and viscosity of light non-aqueous phase liquids are indicators of natural source zone depletion

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