Assessment Monitored Natural Attenuation Rate in a Petroleum Contaminated Shallow Aquifer

2013 ◽  
Vol 753-755 ◽  
pp. 2223-2226
Author(s):  
Hang Lv ◽  
Guang Yu Lin ◽  
Xiao Si Su ◽  
Ming Yao Liu ◽  
Nai Wang
Keyword(s):  
Mass Flux ◽  
Natural Attenuation ◽  
Petroleum Hydrocarbons ◽  
Environmental Problem ◽  
Shallow Aquifer ◽  
Total Petroleum Hydrocarbons ◽  
Contaminated Site ◽  
Monitoring Period ◽  
Attenuation Rate ◽  
Monitored Natural Attenuation

Contamination of groundwater and soil by petroleum hydrocarbons is a widespread environmental problem. In order to quantify the potential of natural attenuation of groundwater at a petroleum contaminated site. The total petroleum hydrocarbons (TPH) concentrations of 11 rounds were collected during the 1 year monitoring period, and the mass flux technique is used to calculate the attenuation rates. The calculated attenuation rates are between 0.0046-0.0064d-1, which indicating the time to achieve the remediation goal for the contamination site is possible within 3 years by natural attenuation alone.

Biodegradation of total petroleum hydrocarbons (TPH) in highly contaminated soils by natural attenuation and bioaugmentation

Chemosphere ◽  
2019 ◽  
Vol 234 ◽  
pp. 864-874 ◽  
Author(s):  
Marie Thérèse Bidja Abena ◽  
Tongtong Li ◽  
Muhammad Naeem Shah ◽  
Weihong Zhong
Keyword(s):  
Natural Attenuation ◽  
Contaminated Soils ◽  
Petroleum Hydrocarbons ◽  
Total Petroleum Hydrocarbons

scholarly journals Comparative Bioremediation of Crude Oil-Amended Tropical Soil Microcosms by Natural Attenuation, Bioaugmentation, or Bioenrichment

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Vanessa Marques Alvarez ◽  
Joana Montezano Marques ◽  
Elisa Korenblum ◽  
Lucy Seldin
Keyword(s):  
Crude Oil ◽  
Natural Attenuation ◽  
Experimental Period ◽  
Tropical Soils ◽  
Total Petroleum Hydrocarbons ◽  
Soil Microcosms ◽  
Salt Addition ◽  
Monitored Natural Attenuation ◽  
Total Bacterial Community ◽  
Main Factor

Bioremediation is an efficient strategy for cleaning up sites contaminated with organic pollutants. In this study, we evaluated the effectiveness of monitored natural attenuation, bioenrichment, and bioaugmentation using a consortium of three actinomycetes strains in remediating two distinct typical Brazilian soils from the Atlantic Forest and Cerrado biomes that were contaminated with crude oil, with or without the addition of NaCl. Microcosms were used to simulate bioremediation treatments over a 120-day period. During this period, we monitored total petroleum hydrocarbons (TPHs) and n-alkanes degradation and changes in bacterial communities. Over time, we found the degradation rate of n-alkanes was higher than TPH in both soils, independent of the treatment used. In fact, our data show that the total bacterial community in the soils was mainly affected by the experimental period of time, while the type of bioremediation treatment used was the main factor influencing the actinomycetes populations in both soils. Based on these data, we conclude that monitored natural attenuation is the best strategy for remediation of the two tropical soils studied, with or without salt addition.

Application of monitored natural attenuation to remediate a petroleum-hydrocarbon spill site

2006 ◽  
Vol 53 (2) ◽  
pp. 321-328 ◽  
Author(s):  
C.M. Kao ◽  
W.Y. Huang ◽  
L.J. Chang ◽  
T.Y. Chen ◽  
H.Y. Chien ◽  
...  
Keyword(s):  
Natural Attenuation ◽  
Petroleum Hydrocarbons ◽  
Iron Sulfide ◽  
Contaminant Removal ◽  
Passive Remediation ◽  
Monitored Natural Attenuation ◽  
Transport Path ◽  
Spill Site ◽  
Benzene Toluene

Contamination of groundwater by petroleum-hydrocarbons is a serious environmental problem. The Monitored Natural Attenuation (MNA) approach is a passive remediation to degrade and dissipate groundwater contaminants in situ. In this study, a full-scale natural bioremediation investigation was conducted at a gasoline spill site. Results show that concentrations of major contaminants (benzene, toluene, ethylbenzene, and xylenes) dropped to below detection limit before they reached the downgradient monitor well located 280 m from the spill location. The results also reveal that natural biodegradation was the major cause of the observed contaminant reduction. The calculated natural first-order attenuation rates for BTEX and 1,2,4-trimethylbenzene (1,2,4-TMB) ranged from 0.051 (benzene) to 0.189 1/day (1,2,4-TMB). Evidence for the occurrence of natural attenuation includes the following: (1) depletion of dissolved oxygen, nitrate, and sulfate; (2) production of dissolved ferrous iron, sulfide, and CO2; (3) decreased BTEX concentrations and BTEX as carbon to TOC ratio along the transport path; (4) increased alkalinity and microbial populations; (5) limited spreading of the BTEX plume; and (6) preferential removal of certain BTEX components along the transport path. Additionally, the biodegradation capacity (44.73 mg/L) for BTEX and 1,2,4-TMB was much higher than other detected contaminants within the plume. Hence, natural attenuation can effectively contain the plume, and biodegradation processes played an important role in contaminant removal.

scholarly journals Implications of co-contamination with aged heavy metals and total petroleum hydrocarbons on natural attenuation and ecotoxicity in Australian soils

2018 ◽  
Vol 243 ◽  
pp. 94-102 ◽  
Author(s):  
Leadin S. Khudur ◽  
Deirdre B. Gleeson ◽  
Megan H. Ryan ◽  
Esmaeil Shahsavari ◽  
Nagalakshmi Haleyur ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Natural Attenuation ◽  
Petroleum Hydrocarbons ◽  
Total Petroleum Hydrocarbons

Monitored natural attenuation forum: A panel discussion on the use of integrated mass flux and MNA inconsistencies within federal and state agencies

2005 ◽  
Vol 16 (1) ◽  
pp. 141-153 ◽  
Author(s):  
Karen Vangelas ◽  
Frank H. Chappelle ◽  
Jim Cummings ◽  
Paul C. Johnson ◽  
Kenneth A. Lovelace Jr. ◽  
...  
Keyword(s):  
Mass Flux ◽  
Natural Attenuation ◽  
Panel Discussion ◽  
State Agencies ◽  
Monitored Natural Attenuation

Diagnostic and resulting approaches to restore petroleum-contaminated soil in a Mexican tropical swamp

2000 ◽  
Vol 42 (5-6) ◽  
pp. 377-384 ◽  
Author(s):  
M. Gallegos Martínez ◽  
A. Gómez Santos ◽  
L. González Cruz ◽  
M.A. Montes de Oca García ◽  
L. Yáñez Trujillo ◽  
...  
Keyword(s):  
Petroleum Hydrocarbons ◽  
Total Petroleum Hydrocarbons ◽  
Microbial Consortia ◽  
Contaminated Site ◽  
Second Phase ◽  
Remote Sensors ◽  
Petroleum Contaminated Soil ◽  
Low Sensitivity ◽  
Oil Company

A multidisciplinary three-step methodology is being developed to diagnose the extent and type of petroleum pollutants and resulting technological approaches to restore a contaminated site. At first, the site was delimitated and its zones identified by using remote sensors. An area of 307 ha considered of major importance to the national Mexican oil company, Petróleos Mexicanos (PEMEX), was identified. 75% of total analyzed soil samples ranged between 10-50,000 ppm of total petroleum hydrocarbons (TPH) and 25% between 50,000 and 434,000 ppm. Aliphatic and asphaltene groups were predominant and technological alternatives were proposed. In a second phase the identification of native botanical and microbial capabilities to biodegrade pollutants was achieved. Three native botanical species were selected for greenhouse studies: Cyperus laxus showed low sensitivity to TPH resulting in higher seed germination efficiency and growth rate. Since microbial consortia isolated from C. laxus rhizosphere were able todegrade up to 70% of TPH in 30 days laboratory cultures, a phytoremediation-reforest alternative was finally proposed to PEMEX. In a third step, the construction of a pilot plant in situ is now in course wherein both treatability studies and reforest strategies are being developed.

Monitored natural attenuation — can mass flux through monitoring fences document mass loss in groundwater plumes?

2020 ◽  
pp. 311-312
Author(s):  
J.F. Barker ◽  
C. Beland-Pelletier ◽  
F. Blaine ◽  
J.F. Devlin ◽  
M.W.G. King ◽  
...  
Keyword(s):  
Mass Loss ◽  
Mass Flux ◽  
Natural Attenuation ◽  
Monitored Natural Attenuation
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