Effect of Enhanced Conditions (C, N and Ultrasonic Power) on the Biodegradation of Mixed Endocrine Disrupting Compounds by Pseudomonas putida

2013 ◽  
Vol 742 ◽  
pp. 388-391 ◽  
Author(s):  
Yu Li ◽  
Chang Zhi Zhou ◽  
Chen Zhang ◽  
Xiao Yu Cai ◽  
Chong Meng
Keyword(s):  
Carbon Source ◽  
Bisphenol A ◽  
Pseudomonas Putida ◽  
Nitrogen Source ◽  
Substrate Concentration ◽  
Endocrine Disrupting Compounds ◽  
Ultrasonic Power ◽  
Biodegradation Rate ◽  
Endocrine Disrupting ◽  
External Conditions

Endocrine disrupting compounds (EDCs), such as estrone (E1), estrodiol (E2), estriol (E3), 17α-Ethynylestradiol (EE2) and bisphenol A (BPA) were biodegraded byPseudomonas Putida. Under the fixed conditions of inoculums size and substrate concentration, the influences of enhanced conditions, such as carbon source, nitrogen source and ultrasonic power, had been investigated. The biodegradation rates of EDCs have increased by 16.98-40.15% and 18.37-24.86% after adding carbon source and nitrogen source, respectively. Ultrasonic power can improve the biodegradation rate by 14.09-24.66%. Meanwhile, the biodegradation rate could be up to about 90% under the external conditions. The study provided a basis for the enhance control of EDCs and other contaminants.

Screening of pharmaceuticals and endocrine disrupting compounds in water supplies of Cyprus

2010 ◽  
Vol 62 (11) ◽  
pp. 2720-2728 ◽  
Author(s):  
Konstantinos C. Makris ◽  
Shane A. Snyder
Keyword(s):  
Surface Water ◽  
Bisphenol A ◽  
Water Samples ◽  
Potable Water ◽  
Endocrine Disrupting Compounds ◽  
Water Supplies ◽  
Temporal And Spatial Distribution ◽  
Treated Effluent ◽  
Endocrine Disrupting ◽  
Finished Surface

Cyprus is currently the leading country in antibiotic consumption among all European Union member countries and is likely to have a high consumption of pharmaceuticals overall. This reconnaissance type of project sought to investigate the occurrence of 16 pharmaceuticals, six known or suspected endocrine disrupting compounds (EDCs), two flame retardants, one insect repellant, and one fragrance for the first time in water supplies of Cyprus. Groundwater samples from sites that were located beneath farms scattered around Cyprus, wastewater influent and tertiary-treated effluent, raw and finished surface water, and household potable water samples were analyzed using liquid chromatography and tandem mass spectrometry. Most of the tested compounds were < minimum reporting limit, except for ibuprofen (mean of 1.4 ng L−1) and bisphenol A (mean of 50 ng L−1), which were detected in more than one out of the five groundwater sampling sites. Certain compounds were found in large concentrations in the wastewater influent (caffeine 82,000 ng L−1, sulfamethoxazole 240 ng L−1, ibuprofen 4,300 ng L−1, and triclosan 480 ng L−1). However, several pharmaceuticals and EDCs were detected in the tertiary-treated effluent (recycled water). For the raw and finished surface water, and potable water samples, ibuprofen was detected, whereas, bisphenol-A was measured in only potable water. Overall, with a few notable exceptions, source, finished and potable water had rare detection or low concentration of target compounds, but further research is needed to elucidate the temporal and spatial distribution of the detected emerging contaminants along with the characterization of the related public health risk.

scholarly journals Facile Synthesis of Porous ZnO Nanoparticles Efficient for Photocatalytic Degradation of Biomass-Derived Bisphenol A Under Simulated Sunlight Irradiation

2021 ◽  
Vol 8 ◽  
Author(s):  
Yujie Wang ◽  
Kang Hu ◽  
Zhiyu Yang ◽  
Chenlu Ye ◽  
Xin Li ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Photocatalytic Degradation ◽  
Inorganic Ions ◽  
Endocrine Disrupting Compounds ◽  
Degradation Process ◽  
Sunlight Irradiation ◽  
Calcination Temperatures ◽  
Endocrine Disrupting Compound ◽  
Endocrine Disrupting ◽  
Photocatalytic Removal

Bisphenol A (BPA) produced from biomass is a typical endocrine disrupting compound that is carcinogenic and genotoxic and can be accumulated in water due to its extensive use and difficult degradation. In this study, the porous ZnO photocatalyst with core-shell structure and large surface area was successfully developed for the efficient photocatalytic degradation of BPA. The various effects of calcination temperatures, BPA concentrations, ZnO dosages, pH and inorganic ions on the degradation performance were systemically studied. The results showed that 99% degradation of BPA was achieved in 1 h using the porous ZnO calcined at 550°C under the conditions of 30 mg/L BPA, 1 g/L ZnO, and pH of 6.5. Besides, the inhibition effects of anions for the photocatalytic removal of BPA decreased in the order of H2PO4- > HCO3- > SO42- > Cl−, while the cations K+, Ca2+, and Na+ had little effect on the photocatalytic degradation of BPA. The results of scavenging experiments showed that h+, ·O2-, and e− played the key role in the photocatalytic degradation process. Finally, the main pathways of BPA degradation were proposed based on ten intermediates found in the degradation process. This work may provide a good guideline to degrade various endocrine disrupting compounds in wastewater treatment.

scholarly journals Characterization of protease producing fungi Aspergillus funiculosus and A. tamarii, and their proteases

2013 ◽  
pp. 91-98
Author(s):  
Z Shahina ◽  
MT Hossain ◽  
MA Hakim
Keyword(s):  
Enzyme Activity ◽  
Carbon Source ◽  
Nitrogen Source ◽  
Substrate Concentration ◽  
Protease Activity ◽  
Maximal Activity ◽  
Environmental Condition ◽  
Nutritional Factors ◽  
Aspergillus Funiculosus

Two Aspergillus spp. namely A. funiculosus (Za) and A tamarii (Zc) were isolated, purified, identified and studied for their protease activity under some selected environmental condition and nutritional factors. The strains showed the maximal activity of protease after 5 days (Za) and 6 days (Zc) of incubation at 27ºC in a medium containing peptone as nitrogen source with pH 5.0. Isolate Za showed highest protease activity in the presence of fructose as carbon source, at 35 °C, with pH 6.0 and 2.5% casien as substrate concentration. Where as for Zc it was starch as carbon source, temperature 40 °C, with pH 7.0 and 2% casien ,the isolate showed highest enzyme activity. DOI: http://dx.doi.org/10.3329/cujbs.v4i1.13390 The Chittagong Univ. J. B. Sci.,Vol. 4(1&2):91-98, 2009

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