Zeta-potential of concrete in presence of chelating agents

Popov, Konstantin; Glazkova, I.; Myagkov, S.; Petrov, A. A.; Sedykh, É. M.; Bannykh, L. N.; Yachmenev, Val G.

doi:10.1016/j.colsurfa.2006.11.038

Cited by 16 publications

(11 citation statements)

References 29 publications

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“…In the electrophoretic measurements with clean mortar in DW, negative values of zeta potential has been obtained, even though in literature positive values have been reported [12,23,29]. This difference has been attributed to the dilution effect.…”

Section: Zeta Potential In the Different Systemsmentioning

confidence: 92%

“…Trials with different types of treatments can be found in literature [3][4][5][6][7][8][9][10][11][12][13]. Among them, only a few studies on electrokinetic treatments to decontaminate concrete [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The most numerous from cement or synthetic CSH suspensions, by the microelectrophoresis technique [12,[15][16][17][18][19][20][21][22][23][24], but also using other techniques as acoustophoresis [25], which are very important to know the basic features of the electrokinetics for these materials but are quite far of the real conditions of application of the remediation treatments, as the material is grinded and in a very diluted suspension. By the first time, the authors were able to demonstrate and quantify the electroosmotic flux through monolithic hardened carbonated concrete [26] in realkalisation tests with carbonated concrete, following in situ the experiment by neutron diffraction analysis [27], studying the influence of the external solution [28], and the composition of the binder [29].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, it is of great interest trying to optimize the treatment by the addition of specific electrolytes enhancing the electrokinetic phenomena, that are of common use in soil remediation techniques and that are very scarce when dealing with construction materials [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of electrophoresis and electroosmosis in construction materials: effect of enhancing electrolytes and heavy metals contamination

2010

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Electrokinetic effects are those that take place by application of an electric field to porous materials, with the zeta potential as the key parameter. Specifically, in the case of contaminated construction materials, the generation of an electroosmotic flux, with the corresponding dragging due to water transport, is a crucial mechanism to succeed in the treatment of decontamination. Therefore, it is of great interest trying to optimize the treatment by the addition of specific electrolytes enhancing the electrokinetic phenomena. Most of the data of zeta potential found in literature for construction materials are based in micro-electrophoresis measurements, which are quite far of the real conditions of application of the remediation treatments. In this paper, electrophoretic and electroosmotic experiments, with monolithic and powdered material respectively, have been carried out for mortar, brick and granite clean and contaminated with Cs, Sr, Co, Cd, Cu and Pb. The electrolytes tested have been distilled water (DW), Na 2 -EDTA, oxalic acid, acetic acid and citric acid. The zeta potential values have been determined through the two different techniques and the results compared and critically analysed.

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Section: Zeta Potential In the Different Systemsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of electrophoresis and electroosmosis in construction materials: effect of enhancing electrolytes and heavy metals contamination

2010

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“…In practice, acid washing and a chelator soil washing are the two most prevalent removal methods used [14,15]. Recently, acetic acid or sodium dodecyl sulfate has been used as an electrolyte for electrokinetic decontamination to increase the removal efficiency of a metal [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Decontamination of radioactive concrete using electrokinetic technology

2010

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The experimental results of the electrokinetic decontamination with 0.01 M of nitric acid were that the cesium ions were removed by up to 52% from the concrete after 15 days, also the cobalt ions were only removed by up to 0.7%. The concrete should be washed with H 2 SO 4 as a pretreatment before electrokintic decontamination to lower its pH below 4.0. The removal efficiencies of 60 Co and 137 Cs by nitric acid were increased by 3.1 and 2.5% more than those by acetic acid. The larger the particle size of the concrete, the more the removal efficiencies of 60 Co and 137 Cs were increased. Also, the removal efficiencies of 60 Co and 137 Cs by the application of an electric current of 20 mA/cm 2 were increased by 1.6 and 3.9% more than those by the application of 10 mA/cm 2 . The removal efficiencies of 60 Co and 137 Cs from the radioactive concrete of 1,940 Bq/kg were 99.8 and 92.3% by electrokinetic decontamination after pretreatment by the application of an electric current of 20 mA/cm 2 for 25 days.

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