Evidence map›Paper›PMID 31981033›Full record

ArticleEnvironmental science and pollution research international2020

Effects of dissolved organic phase composition and salinity on the engineered sulfate application in a flow-through system.

Saeid Shafieiyoun, Riyadh I Al-Raoush, Reem Elfatih Ismail, Stephane K Ngueleu, Fereidoun Rezanezhad, Philippe Van Cappellen

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Article in Environmental science and pollution research international, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

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0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Saeid ShafieiyounDepartment of Civil and Architectural Engineering, College of Engineering, Qatar University, PO Box 2713, Doha, Qatar.
Riyadh I Al-RaoushDepartment of Civil and Architectural Engineering, College of Engineering, Qatar University, PO Box 2713, Doha, Qatar. riyadh@qu.edu.qa.
Reem Elfatih IsmailDepartment of Civil and Architectural Engineering, College of Engineering, Qatar University, PO Box 2713, Doha, Qatar.
Stephane K NgueleuDepartment of Civil and Architectural Engineering, College of Engineering, Qatar University, PO Box 2713, Doha, Qatar.
Fereidoun RezanezhadEcohydrology Research Group and Water Institute, Department of Earth and Environmental Sciences, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada.
Philippe Van CappellenEcohydrology Research Group and Water Institute, Department of Earth and Environmental Sciences, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada.

Funding

Qatar National Research Fund NPRP9-93-1-021
6 · The paper itself

Abstract

Engineered sulfate application has been proposed as an effective remedy to enhance the rate-limited biodegradation of petroleum-hydrocarbon-contaminated subsurface environments, but the effects of dissolved organic phase composition and salinity on the efficiency of this method are unknown. A series of flow-through experiments were conducted for 150 days and dissolved benzene, toluene, naphthalene, and 1-methylnaphthalene were injected under sulfate-reducing and three different salinity conditions for 80 pore volumes. Then, polycyclic aromatic hydrocarbons (PAHs) were omitted from the influent solution and just dissolved benzene and toluene were injected to investigate the influence of dissolved phase composition on treatment efficiency. A stronger sorption capacity for PAHs was observed and the retardation of the injected organic compounds followed the order of benzene < toluene < naphthalene < 1-methylnaphthalene. Mass balance analyses indicated that 50 and 15% of toluene and 1-methlynaphtalene were degraded, respectively. Around 5% of the injected naphthalene degraded after injecting > 60 PVs influent solution, and benzene slightly degraded following the removal of PAH compounds. The results showed substrate interactions and composition can result in rate-limited and insufficient biodegradation. Similar reducing conditions and organic utilization were observed for different salinity conditions in the presence of the multi-component dissolved organic phase. This was attributed to the dominant microbial community involved in toluene degradation that exerted catabolic repression on the simultaneous utilization of other organic compounds and were not susceptible to changes in salinity.

Indexed as

PetroleumPolycyclic Aromatic HydrocarbonsBiodegradation, EnvironmentalSalinitySulfatesPetroleumPolycyclic Aromatic HydrocarbonsSulfatesDissolved organic phaseHydrocarbon-contaminated groundwaterMulti-component NAPLSalinitySulfate injectionSulfate reduction

Identifiers

PMID31981033
PMCPMC7136190

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.