Wyniki wyszukiwania - BazTech

1

Removal of clofibric acid and diclofenac during anaerobic digestion of sewage sludge

Zhou H., Zhang Q., Zhang Q, Ma L., Tu B., Li H., Zhou Y.

Environment Protection Engineering

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2013

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Vol. 39, nr 4

63--77

EN

Removal of two acidic pharmaceuticals, clofibric acid and diclofenac, present in sewage sludge using two kinds of anaerobic digestions was investigated. The effective isolation and purification pretreatment to extract the target compounds from the sewage sludge samples was firstly established, followed by gas chromatography-mass spectrometry (GC-MS) analysis to identify and quantify them. Under mesophilic conditions, the removal efficiencies for clofibric acid and diclofenac with the initial concentrations of 5 μg /dm3 were up to 95% and 97%. After thermophilic anaerobic digestion, the removal efficiency could be increased to 99.3% for clofibric acid, however, it did not increase for diclofenac. In general, anaerobic digestion could effectively remove the target compounds from the sewage sludge (all above 90%).

2

Effect of natural organic matter on adsorption of ionic and non-ionic pharmaceuticals to granular activated carbon

Oh H., Urase T., Simazaki D., Kim H.

Environment Protection Engineering

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2013

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Vol. 39, nr 4

15--28

EN

Adsorption of clofibric acid (CA) and propyphenazone (PPZ) to virgin granular activated carbon (GAC) and preloaded GAC was evaluated in the absence or presence of natural organic matter (NOM). In spite of lower log K ow, PPZ showed higher selectivity to GAC than CA, which has a carboxylic group. Adsorption competition between CA and PPZ in binary solutes system decreased the amount of individual compound adsorbed to GAC. Adsorption isotherm data obtained in the presence of NOM showed that NOM in bulk solution or preloaded on GAC could significantly reduce the amounts of CA and PPZ adsorbed to GAC.

3

Effectiveness of ozonation in decomposition of clofibric acid and bisphenol a in model water solutions

Zacharska E., Odrzywolski A., Depta M., Ozonek J.

Civil and Environmental Engineering Reports

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2010

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No. 4

69-88

EN

The article contains a brief characteristic of the compounds counted among PPCPs (Pharmaceuticals and Personal Care Products) and EDCs (Endocrine Disrupting Compounds) along with the presentation of their removal methods used in typical WWTPs (Wastewater Treatment Plants), WTPs (Water Treatment Plants) as well as different methods examined in laboratory conditions. The article also shows the results of the tests on decomposition of the selected compounds (clofibric acid, bisphenol A) in model water solutions with the use of advanced oxidation technique - ozonation. The compounds were selected because of their commonness and large volume of production. The main purpose of the research is to design an appropriate equipment generating ozone that could be used in a technical scale. The mechanisms of the compounds migration as well as their sources in the environment are described in the article. Further studies concerning identification of the by products of these compounds decomposition as well as recognition of the precise mechanisms occurring during different methods application need to be examined in the future.

PL

Artykuł zawiera krótką charakterystykę związków zaliczanych do grupy PPCP (Farmaceutyki i produkty pielęgnacyjne) i EDC (związki endokrynnie czynne) wraz z przedstawieniem metod ich usuwania stosowanych w typowych zakładach oczyszczalni ścieków, stacjach uzdatniania wody jak również opisem innych metod analizowanych w warunkach laboratoryjnych. Artykuł przedstawia także wyniki badań rozkładu wybranych związków (kwas klofibrowy, bisfenol A) w modelowych roztworach wodnych przy użyciu zaawansowanej techniki utleniania - ozonowania. O wyborze związków do badań zadecydowała głównie ich powszechność występowania oraz znaczna produkcja. Głównym celem badań jest zaprojektowanie odpowiedniej aparatury wytwarzającej ozon, która może być zastosowana na skalę techniczną. Dodatkowo w artykule opisano mechanizmy migracji tych związków wraz z określeniem ich źródeł w środowisku. Dalsze etapy badań obejmują identyfikację produktów pośrednich rozkładu analizowanych związków, a także poznanie dokładnego mechanizmu zachodzącego podczas stosowania różnych metod degradacji.

4

Oczyszczanie ścieków farmaceutycznych metodą fotolizy UV

Biń A. K., Sobera-Madej S.

Inżynieria i Aparatura Chemiczna

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2006

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Nr 5s

21-25

EN

Residual pharmaceuticals and their metabolites represent unde-sired contaminants in surface and ground waters. The advanced oxidations processes (AOPs) may offer an alternative way of their elimination from natural environment. Effects of direct UV (252 nm) photolysis and oxidation of pharmaceutical wastewa-ters {from antibiotic production) and aqueous solution of clofibric acid using UV/HzCh were studied.