Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "photodegradation" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-15 z 15
    Tytuł:
    Synthesis of nanocomposite chitosan-tio2 and its application as photodegradation agent of methilen blue in aqueous medium
    Autorzy:
    Mohadi, Risfidian
    Kurniawan, Christina
    Yuliasari, Nova
    Hidayati, Nurlisa
    Lesbani, Aldes
    Powiązania:
    https://bibliotekanauki.pl/articles/1034905.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    chitosan
    methylene blue
    nanocomposite
    photodegradation
    Opis:
    Synthesis of nanocomposite chitosan-TiO2 have been done. Nanocomposite made of chitosan was isolated from crab shell namely α-chitosan and squid pens as β-chitosan. Nanocomposite was synthesized by combining the function of chitosan as supporting material with TiO2 particle that have high photocatalytic activity. The nanocomposite characterized by FTIR and SEM/EDX analysis show the functional groups of chitosan and and also surface morphology of nanocomposite chitosan-TiO2. The FTIR spectra shows adsorption band of O-Ti-O at 677-695 cm-1, and characteristic adsorption band of chitosan at wavenumbers 1600 cm-1 for -NH2 and 3400 cm-1 for -OH. From SEM/EDX analysis can be seen that TiO2 has been distributed evenly on surface of chitosan. The nanocomposite was applied for photodegradation of methylene blue in aqueous medium on UV light radiation. The optimum percent photodegradation at wavelength 660 nm by the nanocomposite α-chitosan-TiO2 and β-chitosan-TiO2 are 59,48% and 59,82%, respectively.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2015, 20; 213-221
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectrophotometric study on betanin photodegradation
    Autorzy:
    Skopińska, A.
    Tuwalska, D.
    Wybraniec, S.
    Starzak, K.
    Mitka, K.
    Kowalski, P.
    Szaleniec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/115905.pdf
    Data publikacji:
    2012
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    betanin
    betacyanins
    photodegradation
    Beta vulgaris L.
    Opis:
    The most commonly occurring betacyanin plant pigment in nature is betanin (5-O-glucoside of betanidin). Its main source is red beet root (Beta vulgaris L.), used for production of food colorants on a commercial scale [1]. Due to photo-lability of betacyanins, an eff ect of UV-irradiation on betanin degradation in various solutions containing organic solvents was investigated. Organic solvents are used frequently in many stages of pigment preparation or isolation, therefore, knowledge of betalain stability and degradation characteristics in these solutions is essential. Pigment solutions at a concentration of 1 mg/ml were prepared in diff erent solvents: water as well as aqueous solutions of 50% (v/v) acetonitrile, 50% (v/v) methanol or 50% (v/v) ethanol, at the pH range 3–8. Acetate, phosphate and citrate buff ers were used for the experiments. As a result of the pigment photo-decomposition, numerous decarboxylated and dehydrogenated derivatives were formed. Spectrophotometric studies enabled determination of the pigment retention (percentage of the pigment residue relative to its initial concentration after decomposition time). The studies demonstrated betanin high lability in all solvents, not only at extreme pH values, but also in the middle pH range which, in general, provides higher stability of betalains.
    Źródło:
    Challenges of Modern Technology; 2012, 3, 4; 34-38
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polychlorinated dibenzo-p-dioxins and dibenzofurans as products of photodegradation of chlorophenols
    Autorzy:
    Czaplicka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/207913.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    photodegradation
    chlorophenols
    dibenzofurans
    pentachlorophenol
    fotodegradacja
    chlorofenole
    dwubenzofurany
    pentachlorofenol
    dibenzofurany
    Opis:
    Results of the study into photodegradation of 2,4,6-trichlorophenol and pentachlorophenol in aqueous solutions have been presented. Quantum yields and rate constants of the reactions were determined. Intermediate products were identified by GC/MS method. The experiments confirmed formation of polychlorinated dibenzo-p-dioxins and dibenzofurans in photochemical reactions. The findings showed that formation of polychlorinated dibenzo-p-dioxins, and mainly octachlorodibenzo-p- -dioxin, is privileged in the studied reactions when compared to polychlorinated dibenzofurans regardless of the number of chlorine atoms in the molecule. It was also established that increase in the number of chlorine atoms in a molecule resulted in higher chemical efficiency of the reaction.
    Źródło:
    Environment Protection Engineering; 2014, 40, 3; 5-16
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photocatalytic degradation of reactive dyes and real textile composite wastewater using TiO2/MWCNT nanocomposite under UVA and UVA-LED irradiation. A comparative study
    Autorzy:
    Kumar, Deivanai Suresh
    Sellappa, Kanmani
    Powiązania:
    https://bibliotekanauki.pl/articles/207478.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    carbon nanotubes
    methylene blue
    photodegradation
    nanorurki węglowe
    błękit metylenowy
    fotodegradacja
    Opis:
    Nano TiO2 and TiO2/MWCNT nanocomposite synthesized by the sol-gel method were characterized by XRD, BET, SEM, EDAX and FTIR techniques. These nanoparticles were used for photocatalytic decolorisation and degradation of three different reactive dyes such as Reactive Orange 16 (RO 16), Reactive Yellow 145 (RY 145) and Reactive Red 195 (RR 195) and real textile composite wastewater under the UVA and UVA-LED irradiation at room temperature. The maximum color removal of 96% and COD removal of 72% were achieved after 5 h in the presence of TiO2/MWCNT and H2O2 under UVA-LED irradiation. The kinetic studies obey pseudo-first order kinetics which is discussed in terms of the Langmuir–Hinshelwood kinetic model. The maximum degradation of 50% was achieved after 5 h in the presence of H2O2 using TiO2/MWCNT/UVA-LED for real textile composite wastewater. This study revealed that TiO2/MWCNT has improved the photocatalytic activity when compared to that of bare TiO2 under similar conditions. UVA-LED could be an alternative light source for the replacement of the conventional UV light for the photocatalytic treatment of reactive dyes.
    Źródło:
    Environment Protection Engineering; 2019, 45, 2; 95-116
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Time-dependent growth of the dendritic silver prepared using square wave voltammetry technique for methylene blue photodegradation
    Autorzy:
    Budi, Setia
    Dhanasmoro, Lintang
    Purwanto, Agung
    Muhab, Sukro
    Powiązania:
    https://bibliotekanauki.pl/articles/1849284.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Square-wave voltammetry
    dendritic Ag
    photocatalysis
    photodegradation of methylene blue
    Opis:
    Silver (Ag) particle is a promising photocatalyst material with relatively high catalytic activity and good absorption in the visible light region. A dendritic structure of Ag has been studied in the purpose to enhance photocatalytic activity due to a large surface area and active site number of the metallic Ag particles. In this work, the Ag dendritic structure was synthesized from a surfactant-free electrolyte using the square wave voltammetry technique. The time-dependent growth of the Ag dendrites and their photocatalytic activity on methylene blue (MB) photodegradation are reported. Morphological analysis exhibits the fractal dendritic structure of Ag was found to continuously grow by increasing the deposition time. The Ag dendrites showed a low charge transfer resistance (366.21 Ω) and high specific capacitance (2.09 F/g). A high rate of MB degradation (45.57%) under ultraviolet irradiation indicated that the Ag dendrites produced using this technique are effective for the photocatalytic degradation of MB dye.
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 2; 60-65
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of TiO2/ZSM-5 photocatalysts for degradation of rhodamine
    Autorzy:
    Liu, Rulai
    Hu, Jiapeng
    Rau, Juiye
    Lin, Hao
    He, Huan
    Gao, Biao
    Lai, Wenliang
    Powiązania:
    https://bibliotekanauki.pl/articles/2086909.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    photodegradation
    TiO2
    ZSM-5
    kaolin clay
    fotodegradacja
    glinka kaolinowa
    Opis:
    ZSM-5 synthesized by the hydrothermal method from raw kaolin clay was used as support to prepare TiO2/ZSM-5 catalysts via the sol-gel method. All prepared samples were characterized by X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR), ultraviolet-visible spectroscopy (UV-Vis), transmission electron microscopy (TEM), particle size analysis and surface area measurement. The photocatalytic performance of TiO2/ZSM-5 was investigated based on rhodamine B (RhB) removal under UV radiation (450-600 nm. The results showed that the kaolin clay was successfully transformed into ZSM-5. The BET surface area and pore size distribution of the synthesized ZSM-5 were 364 m2/g and 0.54 nm, respectively. SEM and TEM revealed that TiO2 nanoparticles were well distributed on the surface of ZSM-5. The composite TiO2/ZSM-5 catalyst showed 98.53% removal, which is higher than that of pure TiO2 (80.13%) due to adsorption and degradation of RhB (5.0 mg/dm3) under 60 min UV light irradiation at 1 g/dm3 photocatalyst loading. The synergistic effect of TiO22 and ZSM-5, including adsorption, conduction band electron (e-), and valence-band holes (h+), makes the composite superior to pure TiO2, showing its potential for the degradation of organic dye.
    Źródło:
    Environment Protection Engineering; 2022, 48, 2; 29--42
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of Activator Content on the Process of Photodegradation of PP Non-Wovens
    Wpływ udziału aktywatora na proces fotodegradacji włóknin z PP
    Autorzy:
    Mielicka, Elżbieta
    Witkowska, Beata
    Puchowicz, Dorota
    Kamińska, Irena
    Powiązania:
    https://bibliotekanauki.pl/articles/1419660.pdf
    Data publikacji:
    2021
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    photodegradation
    polypropylene nonwoven
    polypropylene
    PP
    activator
    fotodegradacja
    włóknina polipropylenowa
    polipropylen
    aktywator
    Opis:
    The paper presents the test results of non-wovens modified by an activator in different concentrations, produced by the spun bonding method. The aim of the research was to assess the photodegradation process of modified PP non-wovens in dependence on the selected concentration of the modifying agent in the fibre mass and the possibility of introducing a new range of PP non-wovens in agriculture. Non-wovens having a mass per unit area of 100 g/m2 were exposed to sunlight during its highest intensity for a period of four months, and UV irradiance was tested in a xenon lamp with radiation doses corresponding to exposure to sunlight. The samples were exposed to the same energy value of visible and UV radiation in a given series of exposure. For the variants of non-wovens tested, the tensile strength and mass per unit area were tested and the surface topography of the non-wovens analysed. Microscopic analysis of fibre damage in the modified non-wovens was carried out after different degrees of exposure to light. It was observed that PP non-woven samples exposed outdoors degraded more intensively than those tested in the Xenotest.
    Praca przedstawia wyniki badań włóknin, modyfikowanych aktywatorem o różnym stężeniu, wytworzonych metodą spun bonded. Włókniny o masie powierzchniowej 100 g/m2 poddano ekspozycji na światło słoneczne w okresie największego natężenia słońca przez okres czterech miesięcy. Równolegle prowadzono badania natężenia promieniowania UV w lampie xenonowej. Próbki otrzymały jednakową wartość energii promieniowania widzialnego i UV w danej serii naświetlania. Dla badanych wariantów włóknin wykonano badania wytrzymałości na rozciąganie, masy powierzchniowej oraz dokonano analizy topografii powierzchni włóknin. Przeprowadzono analizę mikroskopową uszkodzeń włókien modyfikowanej włókniny po różnym stopniu naświetlenia.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2021, 3 (147); 47-59
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photodegradation of organic compounds in water
    Autorzy:
    Brodzik, K.
    Walendziewski, J.
    Stolarski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778174.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fotodegradacja
    fotokatalizator
    aerożele tytanowo-krzemowe
    photodegradation
    photocatalyst
    titania-silica aerogels
    aerogels
    Opis:
    The application of photocatalytic processes for the decontamination treatment of polluted water has inspired very extensive studies. Titanium dioxide with its large band gap energy and appropriate redox potential was found as one of the most promising semiconductors for the photodegradation of pollutants in the water as well as in gas phase. The titania-silica aerogels obtained by a simple co-hydrolysis method was applied in the photodegradation of the model organic compound. Different ageing times and heat treatment temperatures were found to influence both the activity and the textural properties of the photocatalysts. The obtained aerogels are efficient photodegradation catalysts of methylene blue and allow a removal up to 98 and 78% of the model pollutant from 20 and 500 ppm solutions, respectively.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 3; 130-133
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of photodegradation on mutagenic activity of aquatic solution of chlorophenols
    Autorzy:
    Czaplicka, M.
    Mielżyńska, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/363268.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    chlorofenole
    aktywność mutagenna
    fotodegradacja
    test Salmonella
    chlorophenols
    mutagenic activity
    photodegradation
    Salmonella assay
    Opis:
    The paper presents the effect of UV radiation of 254 nmwavelength on the mutagenic activity of aquatic solutions of 3-chlorophenol (3-CP), 2,4-dichlorophenol (PCP), 2,4,6-trichlorophenol (2,4,6-TCP) and pentachlorophenol (PCP). Mutagenicity studies were carried out on two Salmonella strains: TA98 and TA100, with and without metabolic activation by S9 mix. Stable intermediate products of photodegradation have been identified using the GC/MS method. Chlorophenols in doses below 0.1µg were strongly mutagenic towards both strains: TA98 and TA100. The mutagenic properties of aquatic solutions of chlorophenols for both strains decreased as follows: PCP>=2,4-DCP>2,4,6-TCP>3-CP. Aquatic solutions of three chlorophenols after their photodegradation were non-mutagenic for both bacterial strains, except for 2,4-dichlorophenol. In the case of this compound, the products of its decomposition were more mutagenic for the TA100 strain. No significant metabolic activation by S9 mix was observed which suggests a direct mutagenic impact of chlorophenols on the tested Salmonella strains.
    Źródło:
    Environmental Biotechnology; 2007, 3, 1; 30-36
    1734-4964
    Pojawia się w:
    Environmental Biotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of various agents on stability of 2-phenylbenzimidazole-5-sulfonic acid
    Autorzy:
    Studziński, W.
    Karczmarek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/105632.pdf
    Data publikacji:
    2017
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    PBSA
    UV filters
    emerging pollutants
    photodegradation
    oxidation
    filtr UV
    zanieczyszczenia
    fotodegradacja
    utlenianie
    Opis:
    The subject of this study is 2-phenylbenzimidazole-5-sulfonic acid (PBSA), which is one of 26 filters used for personal protection in the European Union. The aim of the study was to investigate the stability of 2- phenylbenzimidazole-5-sulfonic acid and its sodium salt under the influence of various agents. The study has shown that UV radiation, pH value, hydrogen peroxide are important factors limiting the stability of PBSA. The significance of the study is expanding the knowledge about the stability of PBSA.
    Źródło:
    Acta Innovations; 2017, 25; 5-12
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of oxygen on UV-induced photodegradation of humic acid obtained from composted hulls of Juglans regia walnut
    Autorzy:
    Slawinska, D.
    Polewski, K.
    Rolewski, P.
    Slawinski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/24462.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    black walnut
    humic acid
    photodegradation
    Juglans regia
    walnut tree
    Juglans nigra
    walnut hull
    Źródło:
    International Agrophysics; 2004, 18, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of 2-phenylbenzimidazole-5-sulfonic acid using heterogeneous photocatalysis
    Autorzy:
    Studziński, W.
    Gackowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/105762.pdf
    Data publikacji:
    2018
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    PBSA
    UV filters
    emerging pollutants
    photodegradation
    titanium dioxide
    filtr UV
    zanieczyszczenia
    fotodegradacja
    tlenek tytanu(IV)
    Opis:
    UV filters are classified as environmental pollutants (emerging pollutants). One of the most frequently detected UV filters in real samples is 2-phenylbenzimidazole-5-sulfonic acid (PBSA). It has been shown that conventional technologies applied in sewage treatment plants are not adapted for complete removal of sunscreen agents. Therefore, there is a trend to undertake activities leading to improvement of water quality by enhancing treatment methods. This is important due to the fact that in an aqueous environment, in the presence of UV radiation or sunlight irradation, PBSA generates reactive oxygen species that can damage the DNA of living organisms. The aim of study was to investigate an effect of pH and TiO2 on PBSA stability in the presence of UV radiation. It was found that the rate of PBSA degradation depends on the catalyst dose and pH of solution. The photocatalysis reaction was carried out in a Heraeus laboratory exposure set equipped with a 150 W medium pressure mercury lamp. The course of PBSA degradation process as a function of time was monitored using UV/VIS spectrophotometer and liquid chromatograph equipped with UV-Vis detector.
    Źródło:
    Acta Innovations; 2018, 28; 5-13
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of TiO2 modifications on the effectiveness of photocatalytic processes [review]
    Autorzy:
    Kocot, K.
    Dyrda, G.
    Słota, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/105999.pdf
    Data publikacji:
    2018
    Wydawca:
    Centrum Badań i Innowacji Pro-Akademia
    Tematy:
    titanium dioxide
    doping
    metals
    non-metal
    dyes
    photodegradation
    tlenek tytanu(IV)
    metale
    niemetal
    barwniki
    fotodegradacja
    Opis:
    This paper outlines the recent studies on the application of photocatalysis using semiconductors, with modified titanium dioxide (TiO2) in the process of reducing chemical contamination of surface and ground waters. During the last forty years, an increasing interest in catalysts of this type is noticeable. Hence, a wide range of methods of TiO2 modifications have been proposed so far by using its various polymorphs, composites with metals and non-metals and polymer-coatings or impregnating it with dyes that effectively absorb sunlight.
    Źródło:
    Acta Innovations; 2018, 28; 14-19
    2300-5599
    Pojawia się w:
    Acta Innovations
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Agri-Environmental Conditionson the Degradation of Spunbonded Polypropylene Nonwoven with a Photoactivator in Mulched Organically Managed Zucchini
    Wpływ warunków rolno-środowiskowych na degradację włókniny polipropylenowej z fotodegradantem w uprawie ekologicznej cukinii ze ściółkowaniem.
    Autorzy:
    Bucki, P.
    Siwek, P.
    Domagała-Świątkiewicz, I.
    Puchalski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/232851.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
    Tematy:
    photodegradation
    polypropylene nonwoven
    zucchini
    soil mulching
    organic farming
    fotodegradacja
    włóknina polipropylenowa
    mulczowanie gleby
    rolnictwo organiczne
    Opis:
    An experiment with non-degradable and degradable soil mulching materials in zucchini cultivation was carried out in 2016 and 2017 in the organic field of the Vegetable Experimental Station, Agricultural University of Kraków. Two kinds of polypropylene (PP) nonwoven of 50 g m-2 were used: PP standard and PP with 0.1% photoactivator. The control treatment were plots without mulching. The marketable yield obtained in 2016 was 21% and 15% higher on the plots mulched with PP nonwoven and PP nonwoven with a photoactivator, respectively, in comparison with the non-covered plots. Mulching the soil with PP nonwoven increased the water resistance index of the soil structure in comparison with the Control and photodegradable PP nonwoven mulch. The progress of degradation over a two-month period showed a 40% reduction in the mass of the PP nonwoven with a photoactivator, and at the end of vegetation the mass of the PP nonwoven used was 52% lower than that of a new one. Tensile parameters of the PP nonwovens and their supramolecular structure were measured.
    W pracy zaprezentowano wyniki doświadczenia z degradowalnymi i niedegradowalnymi materiałami do ściółkowania gleby w uprawie cukinii, które zostało przeprowadzone w 2016 i 2017 roku na polu ekologicznym Warzywniczej Stacji Doświadczalnej Uniwersytetu Rolniczego w Krakowie. Do badań wykorzystano dwa rodzaje polipropylenu o masie powierzchniowej 50 g m-2: PP Agro i PP z 0,1% fotodegradantem. Obiekt kontrolny stanowiły poletka bez ściółkowania. Uzyskany plon handlowy w 2016 roku był odpowiednio o 21% i 15% większy z poletek ściółkowanych PP i PP z fotodegradantem, w porównaniu do poletek nieosłanianych. Ściółkowanie gleby włókniną PP zwiększyło wskaźnik wodoodporności struktury gleby w porównaniu do obiektu kontrolnego i ze ściółką PP fotodegradowalną. Postęp degradacji włókniny z fotodegradantem oceniony po okresie 2 miesięcy stosowania wskazuje na 40% ubytek masy, a pod koniec sezonu masa użytej włókniny była mniejsza o 52% od masy nowej. Zmierzono także wytrzymałość na rozciąganie i określono zmiany w strukturze supramolekularnej włóknin.
    Źródło:
    Fibres & Textiles in Eastern Europe; 2018, 2 (128); 55-60
    1230-3666
    2300-7354
    Pojawia się w:
    Fibres & Textiles in Eastern Europe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The significance of dissolved organic matter photodegradation as a source of ammonium in natural waters
    Autorzy:
    Grzybowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/48169.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    natural water
    organic matter
    significance
    irradiation
    ammonium
    photodegradation
    river water
    sea water
    pond water
    dissolved organic matter
    Opis:
    Samples of sea, river and pond water of different absorbance were exposed to artificial radiation resembling sunlight in the UV range. A statistically significant increase in ammonium concentration was detected in pond water of the highest absorbance after 5 h of irradiation. In sea and river water a corresponding increase (< 0.5 μM) was recorded after an exposure time of 25 hours. The bulk characteristics of the analysed samples were insufficient to explain the observed differences.
    Źródło:
    Oceanologia; 2002, 44, 3
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies