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.

scholarly journals Phytoremediation of Soil Contaminated with Crude Oil Using Mucuna Bracteata

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Kuok Ho Daniel Tang ◽  
Yu Wei Eric Law
Keyword(s):  
Crude Oil ◽  
Petroleum Hydrocarbons ◽  
Narrow Range ◽  
Experimental Period ◽  
Fertilizer Application ◽  
Total Petroleum Hydrocarbons ◽  
Oil Degradation ◽  
Physical Conditions ◽  
Crude Oil Degradation ◽  
High Level

This study examines the ability of Mucuna bracteata DC. to remediate soil contaminated with increasing levels of crude oil up to 20%. It also investigates the effect of fertilizer application on crude oil degradation. Changes in crude oil concentrations, pH and moisture of the soil in eight experimental pots were tracked over a period of 9 weeks. The crude oil levels in soil were analysed as Total Petroleum Hydrocarbons (TPHs) using the UV-Vis spectrophotometer. The study revealed the capacity of Mucuna bracteata to phytoremediate soil contaminated with crude oil in all experimental pots though the plant died at 20% contamination towards the end of the experiment. The plant survived up to 15% contamination with that in the fertilized pot showing better physical conditions. In all instances, fertilized pots showed higher rates of crude oil reduction. The amounts of crude oil degraded in fertilized pots were also higher except at 20% contamination. The soil pH varied over a narrow range throughout the experimental period. Moisture of soil contaminated with 15% and 20% crude oil was higher than that contaminated with 5% and 10% crude oil. Mucuna bracteata showed signs of phytoextraction which can be subject to further study. This study contributed a new candidate of phytoremediation for soil contaminated with high level of crude oil.

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.

Efficiency and Kinetics of Total Petroleum Hydrocarbons (TPHs) Removal from Crude Oil Polluted Arable Soil using Palm Bunch Ash and Tween 80

2021 ◽  
Author(s):  
Godwin James Udo ◽  
Nnanake-Abasi O. Offiong ◽  
Alfreda Nwadinigwe ◽  
Clement O. Obadimu ◽  
Aniedi E. Nyong ◽  
...  
Keyword(s):  
Crude Oil ◽  
Petroleum Hydrocarbons ◽  
Tween 80 ◽  
Arable Soil ◽  
Total Petroleum Hydrocarbons ◽  
Kinetics Of ◽  
Palm Bunch

scholarly journals Monitored natural attenuation to manage PFAS impacts to groundwater: Potential guidelines

2021 ◽  
Author(s):  
Charles J. Newell ◽  
David T. Adamson ◽  
Poonam R. Kulkarni ◽  
Blossom N. Nzeribe ◽  
John A. Connor ◽  
...  
Keyword(s):  
Natural Attenuation ◽  
Groundwater Potential ◽  
Monitored Natural Attenuation

Does phosphate enhance the natural attenuation of crude oil in groundwater under defined redox conditions?

2014 ◽  
Vol 169 ◽  
pp. 4-18 ◽  
Author(s):  
Violaine Ponsin ◽  
Olsen Raïnness Mouloubou ◽  
Pascale Prudent ◽  
Patrick Höhener
Keyword(s):  
Crude Oil ◽  
Natural Attenuation ◽  
Redox Conditions

Pollution potential of oil-contaminated soil on groundwater resources in Kuwait

2003 ◽  
Vol 47 (7-8) ◽  
pp. 259-265 ◽  
Author(s):  
P. Literathy ◽  
M. Quinn ◽  
M. Al-Rashed
Keyword(s):  
Drinking Water ◽  
Crude Oil ◽  
Groundwater Resources ◽  
Measurement Techniques ◽  
Soil Layer ◽  
Soil Survey ◽  
Total Petroleum Hydrocarbons ◽  
Fluorescence Measurement ◽  
Groundwater Aquifer ◽  
Freshwater Resource

The only natural freshwater resource of Kuwait occurs as lenses floating on the saline groundwater in the northern part of the country, near to the oil fields. Rainwater is the only means of recharge of this limited groundwater resource. This groundwater is used as bottled drinking water and the fresh groundwater aquifer is considered as a strategic drinking water reserve for Kuwait. As a result of the 1991 Gulf War, the upper soil layer has been widely contaminated with crude oil and crude oil combustion products, which are potential pollutants likely affecting the groundwater resources. Significant efforts have been made to assess this pollution. These included: (a) a soil survey for assessing the soil contamination, and (b) leaching experiments to characterise the mobilization of the soil-associated pollutants. Fluorescence measurement techniques were used during field surveys as well as for laboratory testing. In addition, determination of the total extractable matter (TEM), total petroleum hydrocarbons (TPH), and GC/MS measurement of polyaromatic hydrocarbons (PAHs) were performed for the assessments. The laser induced fluorescence (LIF) measurement, having good correlation with the other laboratory measurements, was proved to provide necessary information for the assessment of the oil-contamination level in the desert soil. The subsequent leaching test with water demonstrated the mobilization of the fluorescing compounds (e.g. PAHs), and the alteration in the leaching characteristics of the contamination during the long-term environmental weathering of the oil.

Evaluation of monitored natural attenuation of explosives at selected Department of Defense sites

2020 ◽  
pp. 349-350
Author(s):  
M. Zakikhani ◽  
J.C. Pennington ◽  
D.W. Harrelson ◽  
D. Gunnison ◽  
J.M. Brannon ◽  
...  
Keyword(s):  
Natural Attenuation ◽  
Department Of Defense ◽  
Monitored Natural Attenuation

scholarly journals Bioremediation of clayey soil contaminated with crude oil: comparison of dynamic and static biopiles in lab-scale

2017 ◽  
Author(s):  
Jorge Antonio Lopes ◽  
Graciane Silva ◽  
Marcia Marques ◽  
Sérgio Machado Correa
Keyword(s):  
Crude Oil ◽  
Contaminated Soil ◽  
Organic Contaminants ◽  
Clayey Soil ◽  
Total Petroleum Hydrocarbons ◽  
Oil Composition ◽  
Polycyclic Aromatic ◽  
Forced Aeration ◽  
Total Fungi ◽  
Technological Options

Bioremediation of aged and newly clayey soil contaminated with crude oil was investigated in lab-scale using two different strategies (biostimulation-BIOS and bioaugmentation-BIOA), also simulating two different technological options: dynamic biopile (M) and static biopile with forced aeration (B). The inoculum used for bioaugmentation was obtained from the aged contaminated soil. The treatments were performed in triplicates and included one control (original contaminated soil-CONT). The treatments were monitored with soil sampling obtained after 0, 24, 59 and 121 days when the populations of total heterotrophic microorganism (THM), total fungi (TF), and oil-degrading microorganism (ODM) as well as the extracted total petroleum hydrocarbons (TPH) and the 16 polycyclic aromatic hydrocarbons (PAH) prioritized by U.S. EPA were analyzed by gas chromatography. It was observed a trend for reduction of the microbial population density from 0 to 121 days. As expected, the population densities of THM and ODM were much higher in bio-augmented soils in both technologies (BIOA-m and BIOA-b) at day 0. However, after 121 days, the superiority in THM density was observed only in the bioreactor simulating static biopile with forced aeration (BIOA-b). Regarding treatment efficiency, the static biopile with forced aeration performed better in the removal of TPH when associated with bioaugmentation (BIOA-b), being equivalent to the microcosms (simulating dynamic biopile) for the other treatments (CONT and BIOS). For PAH, the superiority of the bioreactor was less conspicuous but observed in both bioremediation strategies (biostimulation BIOS-b and bioaugmentation BIOA-b). The results suggested that regarding TPH, the strategy of bioaugmentation was superior to biostimulation and that the bioreactor (simulating static biopile with forced aeration) reached better contaminant reductions than the microcosm (simulating dynamic biopile). Clayey soil contaminated with crude oil poses big challenges for the bioremediation, due to the texture of the soil favouring adsorption of organic contaminants and due to the complex crude oil composition. The bioprocesses are slow, cleavage of larger molecules are likely to generate smaller hydrocarbons and therefore the elimination of the toxicity is very slow, which may require longer periods and auxiliary tools, such as surfactants.

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