Ex situ pilot scale electrokinetic restoration of saline soil using pulsed current

Kim, Do-Hyung; Jo, Sung-Ung; Yoo, Jong‐Shin; Baek, Kitae

doi:10.1016/j.seppur.2013.10.007

Cited by 37 publications

(20 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Initial characteristics of the soil were analyzed and summarized in Table 1. The electrical conductivity of the soil was 8.9 dS/cm, which was 4.5 times higher than the general guideline for cultivation in Korea (Kim et al, 2013b). The soil contained high portions of sulfates as well as nitrates, and calcium was the major exchangeable cation.…”

Section: Methodsmentioning

confidence: 75%

“…Electrokinetic remediation (EKR) has received attention because it is an in-situ remediation technique applicable to low permeability soils (Kim et al, 2013a;Kim et al, 2014;Kim et al, 2012c). The technique has been used to remove metals (Kim et al, 2012d), organic pollutants (Jeon et al, 2010;Park et al, 2009), and ionic pollutants (Cho et al, 2012;Hamdan et al, 2014;Jo et al, 2012;Kim et al, 2012a;Kim et al, 2013c;Kim et al, 2012b;Ottosen and Rorig-Dalgard, 2007) from contaminated soils, sediments, and sludge. Especially, EKR has been used for the removal of metals and inorganic contaminants from low permeability soils because of the great migration potential of ionic species under the influence of electric fields (Acar and Alshawabkeh, 1993;Acar et al, 1995;Kamran et al, 2013;Ottosen and Rorig-Dalgard, 2007).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Electrokinetic Transport of Sulfate in Saline Soil

Jo¹,

Shin

Yang³

et al. 2015

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

The electrokinetic transport of sulfate was investigated as a means of treating and restoring a sulfateaccumulating saline soil. The electrokinetic treatment decreased the electrical conductivity of the soil, an indicator of soil salinity, to 58.6%, 73.1%, and 83.5% for 7, 14 and 21 days, respectively. More than 96% of the chloride and nitrate were removed within 7 days. However, the removal of sulfate was highly influenced by the anode material. An iron anode removed sulfate effectively, whereas, sulfate was hyper-accumulated in the anodic region when an inert anode was used. The iron anode was oxidized in a sacrificial anodic reaction, which competed with the electrolysis reaction of water at the anode, and finally the reaction prevented the severe acidification of the soil in the anodic region. However, the competing reactions produced hydrogen ions at the anode, and the ions were transported toward the cathode, which, in turn, acidified the soil, especially, in the anodic region. The acidification switched the surface charge of the soil from negative to positive, increasing the interaction between the soil surface and sulfate, and thus inhibiting the transport of sulfate under the electric field. The zeta potential 2 analysis of the soil provided an explanation. The results indicate that preventing severe acidification is an important factor which influences the transport of anions and iron anode for the enhanced removal of anionic pollutants by electrokinetic remediation.

show abstract

Section: Methodsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Enhanced Electrokinetic Transport of Sulfate in Saline Soil

Jo¹,

Shin

Yang³

et al. 2015

Water Air Soil Pollut

Self Cite

View full text Add to dashboard Cite

show abstract

“…Also, oxidation, ion exchange, and precipitation, photolysis, dechlorination, soil vapor extraction, soil washing, soil flushing, soil substitution mixing and exchanging saline soil with clean soil and phytoremediation methods are used in desalination. However, some of these techniques are expensive and relatively consuming methods, requiring large quantities of cleaned water and fresh soil and they cannot remove all salts from the land [7,8]. Although the cultivation of salt accumulating plants is temporarily effective, it only reduces the intake of salt.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Saline Harran Soils by Electrokinetic Remediation Method

Karabulut

2019

MEJS

View full text Add to dashboard Cite

Soil salinity has become one of the environmental issues around the world. The most typical example in Turkey was the soil salinization in Harran and Akçakale Plains in recent years. Especially the Harran Plain has the big potential of water and land resources. Irrigated farming is common in the plain. Excessive and uncontrolled irrigation contributed to the high groundwater level and soil salinity in the region. The deficiency of the drainage network in the farmlands was the most important factor in the salinity. In-field drainage systems are newly established. In some areas, irrigation is conducted through the main drainage channel with high salt content (13.5 dS/m). On the other hand, pumping irrigation waters in Akçakale region have high salt content. This problem has grown especially when dealing with low-permeable soils where conventional remedial techniques are inadequate and often ineffective. Electrokinetic treatment is an innovative and clean technology for the restoration of saline soils. This process has proven to be the most effective, promising technique for the optimal and sustainable improvement of salt-affected soils.

show abstract

“…In this context, powering soil eletroremediation with green energy is a challenge in the search for novel eco-friendly environmental remediation processes. In fact, in recent years the use of solar photovoltaic panels as an energy source for powering electrochemical systems has begun to be developed, and currently several works have focused on the use of renewable energy power sources to decrease both the investment and maintenance costs of electrokinetic remediation processes [19][20][21][22][23]. As known, power generation of solar panel depends on sunlight (that is, daytime and weather conditions) and thus it leads to significant energy fluctuations, and as a consequence the system becomes fed by a non-constant energy source.…”

Section: Introductionmentioning

confidence: 99%

“…However, duration of remediation treatment is typically very long and due to the large time-constants coupling of a noncontinuous supply should not have a negative impact on results. In fact, several works [20,[24][25][26][27] have reported that a pulsed EK process can enhance the removal of contaminants form soil and even decrease the electrical energy consumption and minimize the operation problems related to electrode corrosion. Likewise, recent studies [19][20][21][22][23] show that solar powered electrokinetic remediation drive the treatment of metals polluted soils with removal efficiency comparable with that achieved by DC power supply.…”

Section: Introductionmentioning

confidence: 99%

Solar-powered electrokinetic remediation for the treatment of soil polluted with the herbicide 2,4-D

Souza

Sáez

Llanos

et al. 2016

Electrochimica Acta

View full text Add to dashboard Cite

In this work, the removal of a model pesticide (2,4-Dichlorophenoxyacetic acid, 2,4-D) using Electrokinetic Soil Flushing (EKSF) powered directly by DC current or by solar panels during a 15 days long treatment has been studied. Results show changes in operating conditions during the solar test, which can be clearly related to the day-night cycle, with a maximum solar irradiation intensity of 513 W m-2 at noon and an average daily charge supplied of 6.2 Ah d-1. The fluctuations in the intensity supplied to the electrochemical system lead to softer pH and conductivity profiles between anodic and cathodic wells in the case of photovoltaic (PV) powered system. After the 15 days long tests, the removal of 2,4-D reaches 90.2 % and 73.6% in the electroremediation powered with DC power supply and solar panels, respectively. In this period,the total applied charge passed is 4.3 and 24.3 Ah kg-1 in both system, respectively. This means that the PV-powered electroremediation results in a much less efficient system, in which a much higher amount of charge is required to reach the same removal of pollutants in the soil. This fact may be related to the significantly lower EO flux observed during the operation of the PV-powered system.

show abstract

Ex situ pilot scale electrokinetic restoration of saline soil using pulsed current

Cited by 37 publications

References 25 publications

Enhanced Electrokinetic Transport of Sulfate in Saline Soil

Enhanced Electrokinetic Transport of Sulfate in Saline Soil

Improvement of Saline Harran Soils by Electrokinetic Remediation Method

Solar-powered electrokinetic remediation for the treatment of soil polluted with the herbicide 2,4-D

Contact Info

Product

Resources

About