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Lj V Rajakovic - One of the best experts on this subject based on the ideXlab platform.

  • governing factors for Motor Oil removal from water with different sorption materials
    Journal of Hazardous Materials, 2008
    Co-Authors: V Rajakovicognjanovic, G Aleksic, Lj V Rajakovic
    Abstract:

    This paper has been focused on the sorbent efficiency for Motor Oil removal from water. Two types of sorbents were investigated: organic and inorganic. Natural wool fibers (NWFs) and recycled-wool-based nonwoven material (RWNM)) were tested as organic type of sorbents. Sepiolite, bentonite and zeolite have been chosen as representative inorganic sorbents. Sorption was carried out in batch sorption system. Efficiency of Oil removal was determined by measuring the Oil concentration before and after the sorption process. Extractive-gravimetric method and refractive index determination have been applied as analytical methods for determination of Oil concentration in water. Governing factors for sorbent efficiency were proposed, analysed and compared. It was concluded that sorption process is mostly affected by mass of sorbent, sorption time, temperature and pH value of water. NWFs, which were the most efficient sorbent showed maximal efficiency and maximal sorption capacity: 0.1 g of NWFs after 10 min at 20 °C and pH 8.00 sorbed 3.3 g of Motor Oil from 300 mL of water polluted with 4.5 g of Motor Oil. Maximal efficiency for all sorbents investigated was reached after 30 min of sorption processes, it was 95.0% for NWF, 43.0% for NRWM, 20.7% for sepiolite, 19.6% for bentonite and 21.2% for zeolite. Physical adsorption onto all sorbents is a favorable process (sorption efficiency decrease with increasing temperature) while sorption onto bentonite and zeolite is a result of both physical adsorption and chemisorption (sorption efficiency increase with increasing temperature, up to 80 °C).

Fred Tepper - One of the best experts on this subject based on the ideXlab platform.

  • Study of friction reduction by nanocopper additives to Motor Oil
    Wear, 2002
    Co-Authors: Sergey Tarasov, Miri Lerner, A. Kolubaev, S. Belyaev, Fred Tepper
    Abstract:

    Nanoscale copper powder has been produced using such an energetic method as the electric explosion of metallic wire ("EEW" process) in an inert gas. The crystalline structure of nanoparticles has been characterized by HRTEM and particle size distribution has been measured. The nanopowder has been added to Motor Oil and friction coefficient measured to compare with that of pure Oil. SEM characterization of the worn surfaces and X-ray microanalysis have been performed to reveal both changes in topology of the worn surfaces and traces of copper. © 2002 Elsevier Science B.V. All rights reserved.

  • study of friction reduction by nanocopper additives to Motor Oil
    Wear, 2002
    Co-Authors: Sergey Tarasov, Miri Lerner, A. Kolubaev, S. Belyaev, Fred Tepper
    Abstract:

    Abstract Nanoscale copper powder has been produced using such an energetic method as the electric explosion of metallic wire (“EEW” process) in an inert gas. The crystalline structure of nanoparticles has been characterized by HRTEM and particle size distribution has been measured. The nanopowder has been added to Motor Oil and friction coefficient measured to compare with that of pure Oil. SEM characterization of the worn surfaces and X-ray microanalysis have been performed to reveal both changes in topology of the worn surfaces and traces of copper.

V Rajakovicognjanovic - One of the best experts on this subject based on the ideXlab platform.

  • governing factors for Motor Oil removal from water with different sorption materials
    Journal of Hazardous Materials, 2008
    Co-Authors: V Rajakovicognjanovic, G Aleksic, Lj V Rajakovic
    Abstract:

    This paper has been focused on the sorbent efficiency for Motor Oil removal from water. Two types of sorbents were investigated: organic and inorganic. Natural wool fibers (NWFs) and recycled-wool-based nonwoven material (RWNM)) were tested as organic type of sorbents. Sepiolite, bentonite and zeolite have been chosen as representative inorganic sorbents. Sorption was carried out in batch sorption system. Efficiency of Oil removal was determined by measuring the Oil concentration before and after the sorption process. Extractive-gravimetric method and refractive index determination have been applied as analytical methods for determination of Oil concentration in water. Governing factors for sorbent efficiency were proposed, analysed and compared. It was concluded that sorption process is mostly affected by mass of sorbent, sorption time, temperature and pH value of water. NWFs, which were the most efficient sorbent showed maximal efficiency and maximal sorption capacity: 0.1 g of NWFs after 10 min at 20 °C and pH 8.00 sorbed 3.3 g of Motor Oil from 300 mL of water polluted with 4.5 g of Motor Oil. Maximal efficiency for all sorbents investigated was reached after 30 min of sorption processes, it was 95.0% for NWF, 43.0% for NRWM, 20.7% for sepiolite, 19.6% for bentonite and 21.2% for zeolite. Physical adsorption onto all sorbents is a favorable process (sorption efficiency decrease with increasing temperature) while sorption onto bentonite and zeolite is a result of both physical adsorption and chemisorption (sorption efficiency increase with increasing temperature, up to 80 °C).

Sergey Tarasov - One of the best experts on this subject based on the ideXlab platform.

  • Study of friction reduction by nanocopper additives to Motor Oil
    Wear, 2002
    Co-Authors: Sergey Tarasov, Miri Lerner, A. Kolubaev, S. Belyaev, Fred Tepper
    Abstract:

    Nanoscale copper powder has been produced using such an energetic method as the electric explosion of metallic wire ("EEW" process) in an inert gas. The crystalline structure of nanoparticles has been characterized by HRTEM and particle size distribution has been measured. The nanopowder has been added to Motor Oil and friction coefficient measured to compare with that of pure Oil. SEM characterization of the worn surfaces and X-ray microanalysis have been performed to reveal both changes in topology of the worn surfaces and traces of copper. © 2002 Elsevier Science B.V. All rights reserved.

  • study of friction reduction by nanocopper additives to Motor Oil
    Wear, 2002
    Co-Authors: Sergey Tarasov, Miri Lerner, A. Kolubaev, S. Belyaev, Fred Tepper
    Abstract:

    Abstract Nanoscale copper powder has been produced using such an energetic method as the electric explosion of metallic wire (“EEW” process) in an inert gas. The crystalline structure of nanoparticles has been characterized by HRTEM and particle size distribution has been measured. The nanopowder has been added to Motor Oil and friction coefficient measured to compare with that of pure Oil. SEM characterization of the worn surfaces and X-ray microanalysis have been performed to reveal both changes in topology of the worn surfaces and traces of copper.

Porter Elliott - One of the best experts on this subject based on the ideXlab platform.

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