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Hydrophobization of diatomaceous earth used to remove oil pollutants

Elżbieta Vogt Karolina Topolska
Gospodarka Surowcami Mineralnymi - Mineral Resources Management | 2023 | vol. 39 | No 2 | 209-222 | DOI: 10.24425/gsm.2023.145888
Keywords hydrophobization diatomaceous earth oil pollutants
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Abstract

Contamination of the natural environment with petroleum pollution is still a frequent and particularly dangerous phenomenon, thus there is a need to remove these pollutants. Various types of mineral sorbents (silicate minerals, zeolites, perlite, diatomite, clay rocks) are highly valued in remediation processes due to their affordable, big selectivity and high efficiency. However, many sorbents are not resistant to moisture, which limits their use. The hydrophobization process improves the effectiveness of sorbents used in a humid environment. The DAMSORB produced by IM-POL was hydrophobized with a methanolic stearic acid solution. The use of cheap stearic acid as a modifier is economically advantageous. The evaluation of the hydrophobic properties of the modified material was performed on the basis of the results obtained from the tests: water absorption, floating on the water surface and the contact angles were determined. Tests of the sorption of petroleum-derived compounds were performed on the basis of three procedures: in accordance with the technical sheet of the leading producer of hydrophobic sorption materials in Poland, the Westighouse’s method in the oil layer and the Westighouse’s method on a flat surface. The modified sorbent floats on the surface of the water very well. The average value of the contact angle for the modified sample is 104 degrees. Material is super hydrophobic. In the water environment, the hydrophobized samples have a higher absorption capacity in relation to oil contaminations compared to the raw material. Features of the modified sorbent, such as good buoyancy on the water surface, low affinity to water and better absorption of oil from the solution, make it possible to use the material to remove petroleum contamination from water and highly moist surfaces.
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Authors and Affiliations

Elżbieta Vogt
1
ORCID: ORCID
Karolina Topolska
1
  1. AGH University of Science and Technology, Kraków, Poland

Carbon dioxide removal from MEA - water solution on PDMS tubular membrane

Roman Krupiczka Adam Rotkegel Zenon Ziobrowski
Chemical and Process Engineering | 2011 | No 4 December | 281-290 | DOI: 10.2478/v10176-011-0022-6
Keywords MEA desorption carbon dioxide hydrophobic membrane PDMS
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Abstract

The process of carbon dioxide removal from monoethanolamine (MEA) - water solution was investigated on Poly Di Methyl Siloxane (PDMS) hydrophobic tubular membrane with a ceramic support. The effects of feed temperature, liquid flow rate and MEA concentration on CO2 mass transfer and selectivity were examined and found to be with a reasonable deviation (±25%) with predictions based on the multilayer film model. The membrane resistance was evaluated in separate experiments. The measured CO2 mass fluxes (0.17-0.45 kg/(m2h)) were found to be independent of the MEA concentration in the feed.

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Authors and Affiliations

Roman Krupiczka
Adam Rotkegel
Zenon Ziobrowski

DEVELOPMENT OF HYDROPHOBIC SURGICAL FORCEPS USING POWDER INJECTION MOLDING AND SURFACE TREATMENT

D.Y. Park B.R. Park C.W. Gal D. Lin J.S. Han M.-S. Jeong R. Bollina W. Hwang S.J. Park
Archives of Metallurgy and Materials | 2018 | vol. 63 | No 1 | DOI: 10.24425/118964
Keywords Powder injection molding hydrophobic debinding sintering surface treatment
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Authors and Affiliations

D.Y. Park
B.R. Park
C.W. Gal
D. Lin
J.S. Han
M.-S. Jeong
R. Bollina
W. Hwang
S.J. Park

Growth Temperature Effect of Atomic-Layer-Deposited GdOx Films

Sung Yeon Ryu Hee Ju Yun Min Hwan Lee Byung Joon Choi
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 3 | 755-758 | DOI: 10.24425/amm.2021.136375
Keywords gadolinium oxide (Gd2O3) rare-earth oxide atomic layer deposition hydrophobicity electrical property
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Abstract

Gadolinium oxide (Gd2O3) is one of the lanthanide rare-earth oxides, which has been extensively studied due to its versatile functionalities, such as a high permittivity, reactivity with moisture, and ionic conductivity, etc. In this work, GdOx thin film was grown by atomic layer deposition using cyclopentadienyl (Cp)-based Gd precursor and water. As-grown GdOx film was amorphous and had a sub-stoichiometric (x ~ 1.2) composition with a uniform elemental depth profile. ~3 nm-thick GdOx thin film could modify the hydrophilic Si substrate into hydrophobic surface with water wetting angle of 70°. Wetting and electrical test revealed that the growth temperature affects the hydrophobicity and electrical strength of the as-grown GdOx film.
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Bibliography

[1] C. Wiemer, L. Lamagna, M. Fanciulli, Semiconductor Science and Technology 27, 074013 (2012).
[2] A. Karimaghaloo, J. Koo, H. sen Kang, S.A. Song, J.H. Shim, M.H. Lee, International Journal of Precision Engineering and Manufacturing - Green Technology 6, 611 (2019).
[3] G . Azimi, R. Dhiman, H.M. Kwon, A.T. Paxson, K.K. Varanasi, Nature Materials 12, 315 (2013).
[4] I .K. Oh, K. Kim, Z. Lee, K.Y. Ko, C.W. Lee, S.J. Lee, J.M. Myung, C. Lansalot-Matras, W. Noh, C. Dussarrat, H. Kim, H.B.R. Lee, Chemistry of Materials 27, 148 (2015).
[5] M. Leskelä, K. Kukli, M. Ritala, Journal of Alloys and Compounds 418, 27 (2006).
[6] J.H. Han, A. Delabie, A. Franquet, T. Conard, S. van Elshocht, C. Adelmann, Chemical Vapor Deposition 21, 352 (2015).
[7] S. Govindarajan, T.S. Böscke, P. Sivasubramani, P.D. Kirsch, B.H. Lee, H.H. Tseng, R. Jammy, U. Schröder, S. Ramanathan, B.E. Gnade, Applied Physics Letters 91, 062906 (2007).
[8] H. Kim, H.J. Yun, B.J. Choi, RSC Advances 8, 42390 (2018).
[9] J.H. Shim, G.D. Han, H.J. Choi, Y. Kim, S. Xu, J. An, Y.B. Kim, T. Graf, T.D. Schladt, T.M. Gür, F.B. Prinz, International Journal of Precision Engineering and Manufacturing - Green Technology 6, 629 (2019).
[10] K. Xu, R. Ranjith, A. Laha, H. Parala, A.P. Milanov, R.A. Fischer, E. Bugiel, J. Feydt, S. Irsen, T. Toader, C. Bock, D. Rogalla, H.J. Osten, U. Kunze, A. Devi, Chemistry of Materials 24, 651 (2012).
[11] C. Adelmann, H. Tielens, D. Dewulf, A. Hardy, D. Pierreux, J. Swerts, E. Rosseel, X. Shi, M.K. van Bael, J.A. Kittl, S. van Elshocht, Journal of The Electrochemical Society 157, G105 (2010).
[12] D. Kim, D. Ha Kim, D.H. Riu, B.J. Choi, Archives of Metallurgy and Materials 63, 1061 (2018).
[13] M. Mishra, P. Kuppusami, S. Ramya, V. Ganesan, A. Singh, R. Thirumurugesan, E. Mohandas, Surface and Coatings Technology 262, 56 (2015).
[14] N.K. Sahoo, M. Senthilkumar, S. Thakur, D. Bhattacharyya, Applied Surface Science 200, 219 (2002).
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Authors and Affiliations

Sung Yeon Ryu
1
Hee Ju Yun
1
Min Hwan Lee
2
Byung Joon Choi
1
ORCID: ORCID
  1. Seoul National University of Science and Technology, Department of Material Science and Engineering, Seoul 01811, Korea
  2. University of California Merced, Department of Mechanical Engineering, Merced, California, USA

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