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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kim, Myung-Hee Wang, Ning Lewis, Matthew Chu, Kung-Hui |
| Description | Country affiliation: United States Author Affiliation: Lewis M ( Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136, United States.); Kim MH ( Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136, United States.); Wang N ( 132 Shrewsbury Dr., Wilmington DE19810, United States.); Chu KH ( Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136, United States. Electronic address: kchu@civil.tamu.edu.) |
| Abstract | Fluorotelomer alcohols (FTOHs, [F(CF ) CH CH OH]) are concerned environmental pollutants with perfluorinated carbon chains. FTOHs can be biotransformed; however, the extent, the pace of the defluorination, and types of metabolites produced vary depending on degradative microorganisms under different environment. In this study, we examined ways to increase the effectiveness of the FTOH defluorination process to less persistent major metabolites. Defined mixed cultures and bioaugmented microbial cultures were engineered to study their ability to biotransform 6:2 fluorotelomer alcohol [F(CF ) CH CH OH]. The effects of carbon sources and the concentration of carbon sources were also examined. All experiments resulted in 5:2 sFTOH [F(CF ) CH(OH)CH ] as the primary metabolite at the end point. The carbon sources resulted in different amounts of pathway utilization as well as overall changes in effectiveness. The best overall effectiveness was observed when cosubstrate carbon was kept at low concentrations. Pathway II was best utilized by the P. butanovora+P. fluorescens mixed culture, with lactate having a slight negative impact on pathway II utilization. Additional carbon to augmented activated sludge resulted in decreased 6:2 FTOH biotransformation by 60%. Enrichment cultures showed that shorter chain FTOHs are easier to degrade, with the n-octane enriched culture transforming 20% of 8:2 FTOH, 60% of 6:2 FTOH and 70% of 4:2 FTOH. The microbial communities of the enrichment cultures and the alkane hydroxylase gene were also examined to help understand FTOH biotransformation mechanisms. |
| ISSN | 00489697 |
| Journal | Science of The Total Environment |
| Volume Number | 572 |
| e-ISSN | 18791026 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-12-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Science |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Waste Management and Disposal Pollution Environmental Engineering |
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