Temat: Roztwory - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Zastosowanie metody enzymatycznej do analizy formaldehydu w roztworach wodnych
Analysis of formaldehyde in aqueous solutions by the enzymatic method
Autorzy:: Gonchar, M.V.
Strzelczyk, M.
Maidan, M.M.
Bień, J.
Sibirny, A.A.
Powiązania:: https://bibliotekanauki.pl/articles/237267.pdf
Data publikacji:: 1998
Wydawca:: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:: roztwory wodne
analiza formaldehydu
Opis:: A new sensitive analytical method was developed.The method enables guantitative analysis of formaldehyde ( up to 0.75 nmol per 1 cm3 reaction mixture) in agueous solutions and municipal sewage.For the purpose of the study,use was made of the non-cancerogenic chromogen,3,3' , 5,5' - tetramenthylobenzidine (TMB),which is oxidized by hydrogen peroxide in the peroxidase reaction to form a dye (which can be determined by photometry).The objective of the present study was to examine the eficiency of the enzymatic kit ALCOTEST ( containing alcohol oxidase,peroxidase,chromogen and buffering components ) when used for the determination of formaldehyde in water solutions and municipal sewage.
Źródło:: Ochrona Środowiska; 1998, 3; 35-38
1230-6169
Pojawia się w:: Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Badania nad przydatnością zakarpackiego klinoptylolitu do adsorbcji chloroformu z roztworów wodnych
On the utility of Transcarpathian Clinoptylolite in the adsorption of chloroform from aqueous solutions
Autorzy:: Vasylechko, V.O.
Lebedynets, L.O.
Gryshchouk, G.V.
Leboda, R.
Skubiszewska-Zięba, J.
Powiązania:: https://bibliotekanauki.pl/articles/237261.pdf
Data publikacji:: 1998
Wydawca:: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:: klinoptylolit zakarpacki
roztwory wodne
adsorpcja chloroformu
Opis:: The objective of the study was to determine the sorbing capacity of the transcarpathian clinophylolite ( Ukraine ) when applied to chloroform separation from aqueous solutions. Analyses and measurements included the chemical parameters and porosity of the mineral, as well as the effect of processing temperature, grain size distribution and pH ( of the agueous solution ) on the sorbing properties with respect to water and chloroform.The efficiency of chloroform sorption from the agueous solution ranged from 97 to 99%.This is an indication that the clinoptylolite has a great potential for being effectively used as a sorbend in the concentration of chloroform occuring in agueous solutions.The properties of the clinoptylolite make it applicable not only to analytical procedures,but also to water treatment.
Źródło:: Ochrona Środowiska; 1998, 3; 27-30
1230-6169
Pojawia się w:: Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Badania nad przydatnością klinoptylolitu do adsorpcji jonów Hg(II),Cr(III) i Ni(II) z roztworów wodnych
On the utility of transcarpthian clinoptylolite in the adsarption of Hg(II),Cr(III) and Ni(II) ionsfrom aqueous solutions
Autorzy:: Gomonaj, V.I.
Golub, N.P.
Szekeresh, K.Y.
Leboda, R.
Skubiszewska-Zięba, J.
Powiązania:: https://bibliotekanauki.pl/articles/237281.pdf
Data publikacji:: 1998
Wydawca:: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:: klinoptylolit zakarpacki
roztwory wodne
adsorpcja jonów
Opis:: The objective of the study was to assess the usefulness of the Transcarpatien zeolite-clinoptylolite ( Sokirnica,Ukraine) when applied to the removal of Hg(II),Ni(II) and Cr(III) ions from aqueous solutions.The experiments were carried out with three types of clinoptylolite samples-natural,after thermal processing ( 300 and 500.o C),and after chemical modification (with NH4Cl or HCl).Thus,natural clinoptylolote adr clinoptylolite modifical with 3N NH4Cl were found to have a high sorbing capacity.Maximum adsorption of Hg(II) ions (amounting to 4.7 mg/g was achieved within two hours.The adsorption of Ni(II) ions was alamost complete wilin on hour.The efficiency of Cr(III), ion adsorption amounted to 70%. These data indicate that the investigated clynoptilolite has a potential for being effectively used in water treatment for drunking purposes.Ist properties make in also applicable to the removal of heavy metals from wasterwater. A low initial concentrations of Ni(II) and Cr(III), a good treatment effect conbe achieved within a comparatively short time of contact,ar a result of filtration on the clinoptylolite bed.
Źródło:: Ochrona Środowiska; 1998, 4; 3-6
1230-6169
Pojawia się w:: Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Usuwanie metali ciężkich z roztworów wodnych na sorbentach mineralno-węglowych
Heavy metal removal on mineral-carbon adsorbents
Autorzy:: Grabas, K.
Steininger, M.
Zieliński, S.
Powiązania:: https://bibliotekanauki.pl/articles/237089.pdf
Data publikacji:: 1998
Wydawca:: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:: metale ciężkie
roztwory wodne
sorbenty mineralno-węglowe
Opis:: Five heavy metals (Pb,Ni,Zn,Cu,Cd) were investigated for efficiency of removal from model solutions,using mineral-carbon adsorbents.For the purpose of comparision,use was also made of a non-modified activated carbon,Norit,which is widely applied to watertreatment.Experiments were run with mineral-carbon adsorbents(both powdered and granural) which had been prepered by thermal carbonization of the organic substances contained in natural aluminiosilicates.The experiments also involved a granular mineral-carbon adsorbent,the composition of which had been modified so as to increase chemisorption and fixation of metal cations in the mass and on the surface of the grain.The modified adsorbent was found to be most efficient in removing the investigated heavy metals from the agueous solutions.Activated carbon (Norit)showed wery poor adsorbing capacity for hesvy metals.Thus,the efficiency of adsorption(R) for the Pb cation (which showed the highest removal in this study) was only 17.9% at a carbon dose of 30g/dm3 and a Pb concentration of 100 g/m3.
Źródło:: Ochrona Środowiska; 1998, 1; 17-20
1230-6169
Pojawia się w:: Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Biologiczna ocena skuteczności odbarwiania roztworów barwników w procesie pogłębionego utleniania
Biological estimation of the effect of dye removal via advanced oxidation processes
Autorzy:: Jamroz, T.
Ledakowicz, S.
Żyłła, R.
Sencio, B.
Powiązania:: https://bibliotekanauki.pl/articles/237686.pdf
Data publikacji:: 2001
Wydawca:: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:: ścieki przemysłowe
barwniki
roztwory barwników
metody odbarwiania
utlenianie pogłębione
Opis:: The decolorization process under test carried out by advanced oxidation processes (AOPs) and its effect on the survival of bacteria was studied. Aqueous solutions of reactive dyestuff (Reactive Blue 81; 100mg/dm[3] ) were decolorized by using O3, O3/H2O2, O3/UV, and H2O2/UV as oxidizing agents. Each oxidation process was discontinued after complete decolorization had been achieved. The toxicity of the intermediates formed in the course of the AOPs was determined by the growth test method. The results showed that untreated dyestuff had no toxic effect on the bacterial cultures made use of in the study (E. coli, P. putida, B. subtilis) up to the dye concentration of 1000 mg/dm[3]. Decolorization in the presence of O3 or O3/UV exerted detrimental effect on E. coli. In the presence of O3/HO2 or H2O2/UV, bacterial growth was seriously inhibited (from 48 to 67%).
Źródło:: Ochrona Środowiska; 2001, 1; 29-32
1230-6169
Pojawia się w:: Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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