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Wyszukujesz frazę "Rosinska, A." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Usuwanie PCB i jonów metali ciężkich z wody powierzchniowej w procesie koagulacji
Removal of PCBs and Heavy Metal Ions from Surface Water by Coagulation
Autorzy:
Dąbrowska, L.
Rosińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1819026.pdf
Data publikacji:
2013
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
usuwanie PCB
proces koagulacji
polychlorinated-biphenyls pcbs
organic matter
polyaluminum chloride
optimization
adsorption
Opis:
The aim of the presented research was to analyse the pollution of the Warta River (Poland) with coplanar PCBs (77, 126 and 169) and heavy metals (Ni, Cd, Pb). Aluminum sulfate and pre-hydrolyzed polyaluminum chloride (PAX-XL10, PAX-XL60, PAX-XL69, PAX-XL1905) were used as coagulants, and the following parameters were analysed in water samples from the Warta River: turbidity, colour, TOC and concentrations of PCBs and heavy metals (Ni, Cd, Pb). Composition of water was modified in order to obtain concentrations of each heavy metal of ca. 0.3 mg/L with implementation of particular amounts of cadmium-, lead nitrate (Cd(NO3)24H2O, Pb(NO3)2) and nickel chloride (NiCl26H2O). In order to obtain concentration of 300 ng/L in case of each congener, a standard mixture PCB MIX3, which consisted of indicator congeners, was added to water. After application of PAX-XL1905, polyaluminum chloride with the highest alkalinity, the best results (among the investigated coagulants) for chosen contaminants removal were obtained; 92% decrease of turbidity and 63% TOC concentration was acquired. In case of heavy metals, best effects were obtained for lead and cadmium removal using PAX-XL1905. Concentration of these metals was reduced from 0.3 mg/L to 0.07 and 0.12 mg/L, respectively. Good results of lead removal were also obtained with use of the other coagulants: PAX-XL60 and aluminum sulfate; its concentrations were decreased to following values: 0.09, and 0.12 mg/L, respectively. When PAX-XL1905 was applied, the residual aluminum concentration in purified water was below 0.05 mg/L, whereas, when aluminum sulfate was used the concentration was below 0.3 mg/L. The highest removal rates for indicator PCBs were obtained with use of aluminum sulfate. Total concentration of PCBs was reduced by 65%. Removal efficiency for particular congeners amounted from 54% (PCB 77) to 72% (PCB 126).
Źródło:
Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1228-1242
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ skuteczności usuwania materii organicznej w procesie koagulacji na stężenie THM w chlorowanej wodzie
Effect of the Efficiency of Organic Matter Removal by Coagulation on THM Concentration in Chlorinated Water
Autorzy:
Dąbrowska, L.
Ogrodnik, A.
Rosińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1818076.pdf
Data publikacji:
2016
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
koagulacja
materia organiczna
trihalometany
woda
coagulation
organic matter
trihalomethanes
water
Opis:
The aim of this study was to evaluate the effectiveness of the coagulation process using pre-hydrolyzed salts in reducing the level of pollution of surface water with organic substances. Apart from the typical indicators used to evaluate the content of organic compounds (total and dissolved carbon, ultraviolet absorbance at 254 nm), the potential for trihalomethanes formation was also determined. The THM formation potential reflects the amount of precursors present in water, capable of generating THMs. The coagulants used in the study were Al2(SO4·)3·18H2O, AlCl3·6H2O and pre-hydrolyzed polyaluminium chlorides (commercial agents PAX-XL19F and PAX-XL1910S). Surface water was collected in March 2016, from the Pilica River (Poland). Lowering the DOC content in water after the coagulation was in the range of 32-45%, and the UV254 absorbance in the range of 36-63%, depending on the used coagulant. The largest reduction in values of those indicators were stated using pre-hydrolyzed polyaluminium chlorides. In the chlorinated surface water, presence of CHCl3· and CHCl2Br was demonstrated, CHBr3· and CHClBr2 were not detected. CHCl3· and CHCl2Br concentration was equal to 73.8 and 3.5 μg/dm3, respectively. In the chlorinated water after the coagulation process, CHCl3· concentration ranged from 72.4 to 48.9 μg/dm3, while CHCl2·Br from 5.6 to 4.6 μg/dm3. The lowest concentration of these compounds were obtained in the water subjected to chlorination after previous treatment using PAX-XL19F and PAX-XL1910S. THM formation potential in purified water was by 32 and 29% lower than in surface water.
Źródło:
Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 455-467
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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