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Wyszukujesz frazę "Schild, R." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Early and Middle Holocene paleoclimates in the South Western Desert of Egypt – the worldbefore unification
Autorzy:
Schild, R.
Wendorf, F.
Powiązania:
https://bibliotekanauki.pl/articles/2027010.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
South Western Desert
Egypt
Late Glacial
Holocene
prehistoric cultural entities
climatic changes
Opis:
In the field sea sons of 1990 to 2008 the Com bined Pre his toric Ex pe di tion con ducted an ex ten sive ar chae o log i cal, archaeozoological, archaeobotanical and geomorphological field work at more than a hun dred sites in the Nabta, Kiseiba, El Kortain, Gebal El Beid, Gebel Ramlah and Berget El Sheb Ar eas, South West ern Desert of Egypt. The re - search has helped to de velop a long chro no log i cal se quence of Late Gla cial and Ho lo cene cli ma tic changes in the re - gion. The cli ma tic se quence has been sup ported by more than 300 14C and OSL as says that per mit ted to place most of the cli ma tic events in a firm chro no log i cal frame.
Źródło:
Studia Quaternaria; 2013, 30; 125-133
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical reduction of nitrate by zerovalent iron nanoparticles adsorbed radiation-grafted copolymer matrix
Autorzy:
Ratnayake, S. Y.
Ratnayake, A. K.
Schild, D.
Maczka, E.
Jartych, E.
Luetzenkirchen, J.
Kosmulski, M.
Weerasooriya, R.
Powiązania:
https://bibliotekanauki.pl/articles/146536.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
1-pK Basic Stern Model
acid-driven surface-mediated process
Eley-Rideal like mechanism
priority contaminant
zerovalent iron nanoparticles
Opis:
This research specifically focused on the development of a novel methodology to reduce excess nitrate in drinking water utilizing zerovalent iron nanoparticles (nZVI)-stabilized radiation-grafted copolymer matrix. nZVI was synthesized by borohydrate reduction of FeCl3 and stabilized on acrylic acid (AAc)-grafted non-woven polyethylene/polypropylene (NWPE/PP-g-AAc) copolymer matrix, which was grafted using gamma radiation. The use of nZVI for environmental applications is challenging because of the formation of an oxide layer rapidly in the presence of oxygen. Therefore, radiation-grafted NWPE/PP synthetic fabric was used as the functional carrier to anchor nZVI and enhance its spreading and stability. The chemical reduction of nitrate by nZVI-adsorbed NWPE/PP-g-AAc (nZVI-Ads-NWP) fabric was examined in batch experiments at different pH values. At low pH values, the protective layers on nZVI particles can be readily dissolved, exposing the pure iron particles for efficient chemical reduction of nitrate. After about 24 h, at pH 3, almost 96% of nitrate was degraded, suggesting that this reduction process is an acid-driven, surface-mediated process. The nZVI-water interface has been characterized by the 1-pK Basic Stern Model (BSM). An Eley-Rideal like mechanism well described the nitrate reduction kinetics. In accordance with green technology, the newly synthesized nZVI-Ads-NWP has great potential for improving nitrate reduction processes required for the drinking water industry.
Źródło:
Nukleonika; 2017, 62, 4; 269-275
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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