Wyniki wyszukiwania - BazTech

1

Evaluating the Effect of the Approaching Electrode on the Migration for Metal Ions through the Electro-Kinetic Technique for Contaminated Soil

Thamer Zeina, Khalil Amal H.

Journal of Ecological Engineering

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2023

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Vol. 24, nr 2

72--80

EN

In this study, three experiments using the fixed anode technique and approached anode technique were carried out. The first experiment (EK-1) used distilled water as leaching solution (purging solution) at the anode and cathode chamber under voltage gradient was equal to 1.5 V/cm. In the second and third experiments, a solution enhanced with 1M acetic acid (AA) was used as catholic solution. The results indicate that residual concentration of Zn+2 decreases, beginning with an initial value of 850 mg/kg in all portions of soil sample EK-1, EK-2, in addition to EK-3. It seems that the residual concentration of EK-3 (approached anode technique) was lower than that of EK-1 and EK-2 in identical portions.

2

Electro-Kinetic Remediation of Nickel from Contaminated Soil Using Bio remedies Banana Peels and Surfactant-Enhanced

Hawal Laith Hamdan, Al-Zubaidi Lubna, Allah Serror Atta

Journal of Ecological Engineering

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2021

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Vol. 22, nr 5

214--220

EN

Pollution of the soil by different types of heavy metals is one of the most important problems of the environment. The present study used an electro-kinetic remediation, which is one of the important advanced techniques for the removal nickel from contaminated sandy soil. The study includes many experiments with different pH electrode purging solutions (distilled water at pH of 3, 5 and 7). Anionic surfactant (sodium dioctyl sulfosuccinate, AOT) was used for washing soil as surfactant-enhanced remediation. Bio remedies banana peels (BP) were utilized as eco-friendly, low cost and adsorbent materials to avoid reverse osmosis that effects on the removal process. The results indicated that the greatest removal efficiency (65.2%) was achieved at the pH of purging solution (3) in comparison with pH of (5 and 7). This means that when the pH of the purging solution decreases, the removal efficiency increases. Using AOT as a soil-washing solution increased nickel dissolution and desorption from surface of the soil. Then, the AOT micelles containing nickel easily migrated to the cathode chamber by flow of the electro osmotic; thus, the removal efficiency increased (74.8%). In conclusion, the use of AOT is effective in enhancing nickel removal through the electro kinetic remediation. Bio remedies using banana peels is considered as a successful adsorbent material to avoid the reverse osmosis flow, this will give a new thought for the application these products as adsorption medium.

3

Chromium Elimination from Contaminated Soil by Electro-Kinetic Remediation, Using Garlic Peels Powder

Hawal Laith Hamdan, Al-Sulttani Ali Omran, Kariem Nagam Obaid

Journal of Ecological Engineering

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2021

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Vol. 22, nr 7

252--259

EN

In this paper, an electro-kinetic technique was applied to remove chromium from contaminated soil. This technique is appropriate for the soils with low permeability. Various experiments were carried out under different operating conditions, including various purging solutions. Garlic peels powder (GPP) was used in this study as a cheap adsorbent substance to avert the flow of reverse osmosis, which may affect the removal percentage. The results proved that the removal percentage increased as the pH of the purging solutions decreased. The first three experiments were performed with purging solution at pH of 4, 6, and 8 respectively. The highest removal percentage was 66.3% at pH of 4 compared to the other two experiments at pH of 6 and 8, where the removal percentages were 53.3% and 49.7%, respectively. This paper showed that the percentage of chromium removal decreased along with the voltage. The removal percentage at 1.5 V/cm was 66.3%, while at 1 V/cm was 61%. Garlic peels powder (GPP) is considered as an effective adsorbent material to avert the reverse osmosis flow. Therefore, the use of this material in this study will give a new impression on the application of these products as an absorbent medium.

4

Application of porous glasses in microfluidic devices

Evstrapov A.A., Esikova N.A., Rudnitskaja G.E., Antropova T.T.

Optica Applicata

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2008

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Vol. 38, nr 1

31-38

EN

Nowadays a perspective appears of applying porous glasses in microanalytical devices. The opportunity of application of porous glasses as optical sensors has been shown in the present paper. Preliminary results of studying the electroosmotic flows through porous glasses are discussed.

5

Wykorzystanie potencjału zeta do badań elektryzacji strumieniowej.

Zdanowski M., Kędzia J.

Prace Naukowe Instytutu Podstaw Elektrotechniki i Elektrotechnologii Politechniki Wrocławskiej. Konferencje

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2006

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Vol. 44, nr 18

81-85

PL

W artykule przedstawiono wyniki badań potencjału elektrokinctycznego w mieszaninach toluenu i cykloheksanu. Stwierdzono, że ze względu na duże niepewności uzyskiwanych wyników oraz cechujący je wzrostowy trend przy kolejnych pomiarach, ich wykorzystanie do badań elektryzacji strumieniowej jest ograniczone.

EN

The paper presents research results of the electrokinetic potential in the mixtures of toluene and cyclohcxanc. It was observed that due to a high uncertainty of the results obtained and the increasing trend that characterizes them at the successive measurements, their use for the research on the streaming electrification is limited.