High-Throughput Identification of Microbial Transformation Products of Organic Micropollutants

2010 ◽  
Vol 44 (17) ◽  
pp. 6621-6627 ◽  
Author(s):  
Damian E. Helbling ◽  
Juliane Hollender ◽  
Hans-Peter E. Kohler ◽  
Heinz Singer ◽  
Kathrin Fenner
Keyword(s):  
High Throughput ◽  
Microbial Transformation ◽  
Transformation Products ◽  
Organic Micropollutants

Microbial Transformation of Isosteviol Lactone and Evaluation of the Transformation Products on Androgen Response Element

2008 ◽  
Vol 71 (4) ◽  
pp. 602-607 ◽  
Author(s):  
Bo-Hon Chou ◽  
Li-Ming Yang ◽  
Shwu-Fen Chang ◽  
Feng-Lin Hsu ◽  
Chia-Hsin Lo ◽  
...  
Keyword(s):  
Microbial Transformation ◽  
Transformation Products ◽  
Response Element ◽  
Androgen Response Element

Microbial Transformations of Azaarenes in Creosote-Contaminated Soil and Ground Water: Laboratory and Field Studies

1988 ◽  
Vol 20 (11-12) ◽  
pp. 17-23 ◽  
Author(s):  
Wilfred E. Pereira ◽  
Colleen E. Rostad ◽  
David M. Updegraff ◽  
Jon L. Bennett
Keyword(s):  
Ground Water ◽  
Contaminated Soil ◽  
Isotope Labeling ◽  
Microbial Transformation ◽  
Wood Preservative ◽  
Transformation Products ◽  
Gas Chromatography Mass Spectrometry ◽  
Experimental Conditions ◽  
Hydroxylation Reaction ◽  
Contaminated Aquifers

Azaarenes or aromatic nitrogen heterocycles are a class of compounds found in wood-preservative wastes containing creosote. The fate and movement of these compounds in contaminated aquifers is not well understood. Water-quality studies in an aquifer contaminated with creosote near Pensacola, Florida, indicated that ground water was contaminated with several azaarenes and their oxygenated and alkylated derivatives, suggesting that these oxygenated compounds may be products of microbial transformation reactions. Accordingly, laboratory studies were designed to investigate the fate of these compounds. Under aerobic conditions, soil pseudomonads isolated from creosote-contaminated soil converted quinoline to 2(lH)quinolinone that subsequently was degraded to unknown products. A methanogenic consortium isolated from an anaerobic sewage digestor, in presence of ground-water and creosote-contaminated soil, converted quinoline, isoquinoline, and 4-methylquinoline to their respective oxygenated analogs. In addition, N-, C-, and O-methylated analogs of oxygenated azaarenes were identified by gas chromatography-mass spectrometry (GC-MS) in anaerobic cultures. Under the experimental conditions, 2-methylquinoline was biorefractory. Presence of similar biotransformation products in anaerobic cultures and contaminated ground water from the Pensacola site provided further evidence that these compounds indeed were microbial transformation products. Stable isotope labeling studies indicated that the source of the oxygen atom for this hydroxylation reaction under aerobic and anaerobic conditions was water. A mechanism was proposed for this hydroxylation reaction. Whereas parent azaarenes are biodegradable in both anaerobic and aerobic zones, oxygenated and alkylated analogs are more biorefractory and, hence, persistent in anaerobic zones of contaminated aquifers.

ChemInform Abstract: STUDY OF MICROBIAL TRANSFORMATION PRODUCTS OF 19-HYDROXYSITOSTEROL

1982 ◽  
Vol 13 (39) ◽  
Author(s):  
T. S. KOLYVANOVA ◽  
B. I. BAYUNOVA ◽  
K. N. GABINSKAYA ◽  
YU. N. KOROBOVA ◽  
G. S. GRINENKO
Keyword(s):  
Microbial Transformation ◽  
Transformation Products

Wastewater treatment – adsorption of organic micropollutants on activated HTC-carbon derived from sewage sludge

2015 ◽  
Vol 73 (3) ◽  
pp. 607-616 ◽  
Author(s):  
Frank Kirschhöfer ◽  
Olga Sahin ◽  
Gero C. Becker ◽  
Florian Meffert ◽  
Michael Nusser ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Low Income ◽  
Wastewater Treatment Plants ◽  
Transformation Products ◽  
Hydrothermal Carbonization ◽  
Organic Content ◽  
Low Income Countries ◽  
Organic Micropollutants ◽  
Wastewater Samples

Organic micropollutants (MPs), in particular xenobiotics and their transformation products, have been detected in the aquatic environment and the main sources of these MPs are wastewater treatment plants. Therefore, an additional cleaning step is necessary. The use of activated carbon (AC) is one approach to providing this additional cleaning. Industrial AC derived from different carbonaceous materials is predominantly produced in low-income countries by polluting processes. In contrast, AC derived from sewage sludge by hydrothermal carbonization (HTC) is a regional and sustainable alternative, based on waste material. Our experiments demonstrate that the HTC-AC from sewage sludge was able to remove most of the applied MPs. In fact more than 50% of sulfamethoxazole, diclofenac and bezafibrate were removed from artificial water samples. With the same approach carbamazepine was eliminated to nearly 70% and atrazine more than 80%. In addition a pre-treated (phosphorus-reduced) HTC-AC was able to eliminate 80% of carbamazepine and diclofenac. Atrazine, sulfamethoxazole and bezafibrate were removed to more than 90%. Experiments using real wastewater samples with high organic content (11.1 g m−3) succeeded in proving the adsorption capability of phosphorus-reduced HTC-AC.

Microbial Transformation of Isosteviol and Inhibitory Effects on Epstein−Barr Virus Activation of the Transformation Products

2004 ◽  
Vol 67 (3) ◽  
pp. 407-410 ◽  
Author(s):  
Toshihiro Akihisa ◽  
Yusuke Hamasaki ◽  
Harukuni Tokuda ◽  
Motohiko Ukiya ◽  
Yumiko Kimura ◽  
...  
Keyword(s):  
Epstein Barr Virus ◽  
Microbial Transformation ◽  
Transformation Products ◽  
Inhibitory Effects ◽  
Barr Virus ◽  
Epstein Barr

scholarly journals Exploring micropollutant biotransformation in three freshwater phytoplankton species

2017 ◽  
Vol 19 (6) ◽  
pp. 822-832 ◽  
Author(s):  
Michael A. Stravs ◽  
Francesco Pomati ◽  
Juliane Hollender
Keyword(s):  
Transformation Products ◽  
Phytoplankton Species ◽  
Organic Micropollutants ◽  
Freshwater Phytoplankton

Biotransformation was studied for 24 organic micropollutants in three phytoplankton species, revealing 14 transformation products for 10 compounds.

Microbial transformation products of benzoxazolinone and benzoxazinone allelochemicals––a review

Chemosphere ◽  
2004 ◽  
Vol 54 (8) ◽  
pp. 1025-1038 ◽  
Author(s):  
Inge S. Fomsgaard ◽  
Anne G. Mortensen ◽  
Sandra C.K. Carlsen
Keyword(s):  
Microbial Transformation ◽  
Transformation Products
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