Use of surfactants for the remediation of contaminated soils: A review

Mao, Xuhui; Jiang, Rui; Xiao, Wei; Wang, Yuanyuan

doi:10.1016/j.jhazmat.2014.12.009

Cited by 669 publications

(319 citation statements)

References 139 publications

(135 reference statements)

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“…Critical micelle concentration and total acidity of humic substances and fulvic acid Critical micelle concentration (CMC) of a surfactant is the threshold concentration at which micelles begin to form. Its magnitude has a determining influence on the suitability of a given surfactant for use as a washing agent in that the smaller the CMC the better the washing efficiency (Mulligan et al, 2001;Mao et al, 2015). Fig.…”

Section: Resultsmentioning

confidence: 99%

Humic substances as a washing agent for Cd-contaminated soils

et al. 2017

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Section: Resultsmentioning

confidence: 99%

Humic substances as a washing agent for Cd-contaminated soils

et al. 2017

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“…In this case, the addition of MGDA to Tween ® 80 also gave it an ionic behaviour, which then, acted as an ionic surfactant with the advantages of the non-ionic one (i.e. : low critic micelle concentration and lipophilic behavior) [39].…”

Section: Hg Removal Kinetics In Enhanced Treatmentsmentioning

confidence: 99%

“…Tween ® 80 structure includes a lipophilic part with a very high affinity for the organic compounds and a hydrophilic part, which, on the contrary, tends to be attracted by the moisturised mineral particles [57]. Consequently, its addition to the sediments resulted in the solubilisation of the organic matter and its complexes with Hg, which in turn led to an increase of their transfer to the liquid phase [39,57]. On the other hand, limited reduction achieved for F2 (carbonates) and F5 (sulphides)…”

Section: Hg Removal Kinetics In Enhanced Treatmentsmentioning

confidence: 99%

“…On the other hand, the methylglycinediacetic acid (MGDA) is a relatively novel chelate, much more biodegradable than others jointly with the essential advantage of having a stable thermal behaviour under a wide range of temperatures [35]. Likewise, surfactants with low toxicity and favourable biodegradability, such as Polyoxyethylene (20) sorbitan monooleate, also known as Tween ® 80 [36,37], have been extensively used in organic and inorganic contaminant removal treatments [11,38,39].…”

Section: Introductionmentioning

confidence: 99%

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Remediation of Hg-contaminated marine sediments by simultaneous application of enhancing agents and microwave heating (MWH)

Falciglia

Malarbì

Maddalena

et al. 2017

Chemical Engineering Journal

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This version is available at https://strathprints.strath.ac.uk/60331/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. AbstractThe aim of this work was to investigate Hg removal ability of a novel microwave heating (MWH) treatment for marine sediment remediation enhanced by the application of several agents, biodegradable complexing agent (methylglycinediacetic acid, MGDA), surfactant (Tween ® 80), and citric acid. Main results revealed that MWH allowed a very rapid heating (~450 °C in 7 min) of the irradiated medium. However, without the addition of enhancing agents, a maximum Hg removal of ~72% can be achieved. The application of MGDA led to a higher contaminant removal of ~87% (residual concentration = 5.4 mg kg -1 ). For the treatment including the simultaneous addition of both chelating agent and surfactant, their synergetic action and stripping processes resulted in a very high Hg removal of ~99% for an irradiation time of 7 min, corresponding to a residual concentration of 0.56 mg kg -1 , which is lower than the Italian regulatory limit of 1 mg kg -1 . The use of citric acid resulted in a shortening of the removal kinetics, which allowed the successful application of a shorter remediation time of 5 min. The observed strong passive ability of sediments to convert a microwave irradiation energy into a rapid and large temperature increase undoubtedly represents a key factor in the whole remediation process, making the studied treatment an excellent choice. Kinetic data are suitable for a preliminarily assessment of the effectiveness of clean-up activities, and as basis for future scaling-up studies on MWH of Hgcontaminated sediments.

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“…Electrodes material and configuration [4][5][6][7][8], use of solubilizing agents e.g. chelating agents, surfactants, cyclodextrins, co-solvents as well as granulometry of the soil/sediment sample [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], control and effect of operating parameters e.g. pH, electroosmotic flow (EOF), current density, voltage, etc.…”

Section: Introductionmentioning

confidence: 99%

Performance of electroremediation in real contaminated sediments using a big cell, periodic voltage and innovative surfactants

Hahladakis

Latsos

Gidarakos

2016

Journal of Hazardous Materials

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The present work focused on evaluating the electrokinetic (EK) treatment of real contaminated sediments with toxic metals and polycyclic aromatic hydrocarbons (PAHs), using a big laboratory EK cell, periodic voltage and recently tested non-ionic surfactants. The results indicated that the "day on-night off" application mode of voltage, in conjunction with the selected solubilising agents, favoured the overall EK process. Arsenic, nickel and chromium exhibited the highest removal percentages, obtaining 83%, 67% and 63%, respectively, while zinc and lead attained 54% and 41% at the maximum. Furthermore, in the experiments where the non-ionic surfactants were introduced in the electrolyte chambers, there was a major uniformly removal of PAHs from the entire sediment across the EK cell, indicating the high solubilisation capacity of the enhancing agents. Essentially, transport and in some cases removal of PAHs (particularly from sections adjacent to the electrolyte compartments) also occurred in the unenhanced EK run, mainly due their negative charge, their potential weak bonds to the soil matrix and to the periodic application of voltage. Maximum removal was obtained by the use of Nonidet P40 where app. 1/3 (ca. 6498 g out of 20145 g) of the total initial amount of PAHs were removed from the cell.

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Use of surfactants for the remediation of contaminated soils: A review

Cited by 669 publications

References 139 publications

Humic substances as a washing agent for Cd-contaminated soils

Humic substances as a washing agent for Cd-contaminated soils

Remediation of Hg-contaminated marine sediments by simultaneous application of enhancing agents and microwave heating (MWH)

Performance of electroremediation in real contaminated sediments using a big cell, periodic voltage and innovative surfactants

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