Electrokinetic remediation of diesel-contaminated silty sand under continuous and periodic voltage application

Asadollahfardi, Gholamreza; Rezaee, Milad

doi:10.4491/eer.2018.301

Cited by 24 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highly applied potential could enhance the removal efficiency and shorten remediation time due to the creation of high free radicals and gas in anode and cathode. The electrode passivation and migration of generated gas into the soil close to the cathode and anode could be affected by electrode potential (Asadollahfardi et al 2018;Streche et al 2018). The removal efficiency of phenanthrene in the other study has been summarized in Table 5.…”

Section: Effect Of Ph and Voltagementioning

confidence: 91%

Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Pourfadakari

Jorfi

Roudbari

et al. 2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

The objective of this work was to investigate the modification of soil contaminated with phenanthrene (PHE) by electro-kinetic remediation (EKR) process using response surface methodology (RSM). The soil sample was obtained from the subgrades (0-30 cm) of an area close to Shahroud City, Northeast of Iran. The effect of variables such as initial pH, voltage, electrolyte concentration, and reaction time on PHE removal was studied. Based on the results obtained from the central composite design (CCD) experiment, the highest and lowest amount of PHE removal was 97 and 20%, respectively. In this study, the variables A, B, C, AB, AC, and C 2 with a p value < 0.05 were significant model terms and the parameter of the lack of fit was not significant (p value = 0.0745). Findings indicated that the "predicted R-squared" of 0.9670 was in reasonable agreement with the "adj R-squared" of 0.9857 and the plot of residual followed a normal distribution and approximately linear. Also, the kinetic rates of the removal PHE by the EKR process best fitted with a first-order kinetic model (R 2 : 0.926). Results of the investigation of the effective variables showed that in values of pH 3, time of 168 h, voltage of 3 V, and electrolyte concentration of 4 mg/L, the removal efficiency of PHE reached 96.6%.

show abstract

Section: Effect Of Ph and Voltagementioning

confidence: 91%

Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Pourfadakari

Jorfi

Roudbari

et al. 2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

show abstract

“…Gidudu and Chirwa 59 justified the choice of adopting the 30 V and 185 mm configuration with increased performance that offset the increased cost. Invariably this could decrease the period of remediation and time spent on site thereby reduces the amount spent on manpower and machinery 62 . Detail review of electrode configurations to address pH problems and enhance petroleum hydrocarbon removal from contaminated soil can be found in Saini et al 61 .…”

Section: Soil Remediation Technologymentioning

confidence: 99%

Cost reduction strategies in the remediation of petroleum hydrocarbon contaminated soil

Ahmed¹,

Nwaichi²,

Ugwoha³

et al. 2022

Open Res Africa

View full text Add to dashboard Cite

Petroleum hydrocarbon spill on land pollutes soil and reduces its ecosystem. Hydrocarbon transport in the soil is aided by several biological, physical, and chemical processes. However, pore characteristics play a major role in the distribution within the soil matrix. Restoring land use after spills necessitates remediation using cost-effective technologies. Several remediation technologies have been demonstrated at different scales, and research is ongoing to improve their performances towards the reduction of treatment costs. The process of removing the contaminants in the soil is through one or a combination of containment, separation, and degradation methods under the influence of biological, physical, chemical, and electrically-dominated processes. Generally, performance improvement is achieved through the introduction of products/materials and/or energy. Nevertheless, the technologies can be categorized based on effectiveness period as short, medium, and long term. The treatment cost of short, medium, and long-term technologies are usually in the range of $39 – 331/t (/tonne), $22 – 131/t, and $8 – 131/t, respectively. However, the total cost depends on other factors such as site location, capital cost, and permitting. This review compiles cost-saving strategies reported for different techniques used in remediating petroleum hydrocarbon polluted soil. We discuss the principles of contaminant removal, performance enhancing methods, and the cost-effectiveness analysis of selected technologies.

show abstract

“…The sample in Container 5 was treated by adding the nutrients mentioned above and microbes, i.e., a biostimulation-bioaugmentation joint process, and thus marked as "N-B." At the end of 3,6,9,12,15,18,21,24, and 27 days, 5.0 g of soil samples were collected from 10 points at the superstratum and substratum from each treatment. We divided each sample into two parts, one of 2.5 g was stored at −20 • C for DNA extraction, and the other of 2.5 g was stored at 4.0 • C for diesel analysis.…”

Section: Soil Treatment and Experimental Designmentioning

confidence: 99%

“…Several methods are widely used for soil remediation, such as vapor treatment [11,12], chemical treatment [13,14], physical remediation [15][16][17] and bioremediation [18,19], etc. Among these, bioremediation techniques have drawn growing attention due to their cost-effectiveness and non-invasiveness [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Ecological Response in the Integrated Process of Biostimulation and Bioaugmentation of Diesel-Contaminated Soil

Li¹,

Chen

et al. 2021

Applied Sciences

View full text Add to dashboard Cite

The study applied microbial molecular biological techniques to show that 2.5% to 3.0% (w/w) of diesel in the soil reduced the types and number of bacteria in the soil and destroyed the microbial communities responsible for the nitrogen cycle. In the meantime, the alkane degradation gene alkB and polycyclic aromatic hydrocarbons (PAHs) degradation gene nah evolved in the contaminated soil. We evaluated four different remediation procedures, in which the biostimulation-bioaugmentation joint process reached the highest degradation rate of diesel, 59.6 ± 0.25% in 27 days. Miseq sequencing and quantitative polymerase chain reaction (qPCR) showed that compared with uncontaminated soil, repaired soil provides abundant functional genes related to soil nitrogen cycle, and the most significant lifting effect on diesel degrading bacteria γ-proteobacteria. Quantitative analysis of degrading functional genes shows that degrading bacteria can be colonized in the soil. Gas chromatography-mass spectrometry (GC-MS) results show that the components remaining in the soil after diesel degradation are alcohol, lipids and a small amount of fatty amine compounds, which have very low toxicity to plants. In an on-site remediation experiment, the diesel content decreased from 2.7% ± 0.3 to 1.12% ± 0.1 after one month of treatment. The soil physical and chemical properties returned to normal levels, confirming the practicability of the biosimulation-bioaugmentation jointed remediation process.

show abstract

Electrokinetic remediation of diesel-contaminated silty sand under continuous and periodic voltage application

Cited by 24 publications

References 23 publications

Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Optimization of electro-kinetic process for remediation of soil contaminated with phenanthrene using response surface methodology

Cost reduction strategies in the remediation of petroleum hydrocarbon contaminated soil

Ecological Response in the Integrated Process of Biostimulation and Bioaugmentation of Diesel-Contaminated Soil

Contact Info

Product

Resources

About