دورية أكاديمية
Effects of TiO2 and Ag nanoparticles on polyhydroxybutyrate biosynthesis by activated sludge bacteria.
| العنوان: | Effects of TiO2 and Ag nanoparticles on polyhydroxybutyrate biosynthesis by activated sludge bacteria. |
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| المؤلفون: | Priester JH; Bren School of Environmental Science & Management, Earth Research Institute, and UC Center for the Environmental Implications of Nanotechnology (UC CEIN), University of California , Santa Barbara, Santa Barbara, California 93106, United States., Van De Werfhorst LC, Ge Y, Adeleye AS, Tomar S, Tom LM, Piceno YM, Andersen GL, Holden PA |
| المصدر: | Environmental science & technology [Environ Sci Technol] 2014 Dec 16; Vol. 48 (24), pp. 14712-20. Date of Electronic Publication: 2014 Dec 04. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 0213155 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5851 (Electronic) Linking ISSN: 0013936X NLM ISO Abbreviation: Environ Sci Technol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Washington DC : American Chemical Society Original Publication: Easton, Pa. : American Chemical Society, c1967- |
| مواضيع طبية MeSH: | Nanoparticles*, Bacteria/*metabolism , Polyesters/*metabolism , Sewage/*microbiology , Silver/*pharmacology , Titanium/*pharmacology, Bacteria/drug effects ; Bacteria/genetics ; Bacteria/isolation & purification ; Biomass ; Microbial Consortia/drug effects ; Microbial Consortia/genetics ; RNA, Ribosomal, 16S ; Waste Disposal, Fluid/methods ; Wastewater |
| مستخلص: | Manufactured nanomaterials (MNMs) are increasingly incorporated into consumer products that are disposed into sewage. In wastewater treatment, MNMs adsorb to activated sludge biomass where they may impact biological wastewater treatment performance, including nutrient removal. Here, we studied MNM effects on bacterial polyhydroxyalkanoate (PHA), specifically polyhydroxybutyrate (PHB), biosynthesis because of its importance to enhanced biological phosphorus (P) removal (EBPR). Activated sludge was sampled from an anoxic selector of a municipal wastewater treatment plant (WWTP), and PHB-containing bacteria were concentrated by density gradient centrifugation. After starvation to decrease intracellular PHB stores, bacteria were nutritionally augmented to promote PHB biosynthesis while being exposed to either MNMs (TiO2 or Ag) or to Ag salts (each at a concentration of 5 mg L(-1)). Cellular PHB concentration and PhyloChip community composition were analyzed. The final bacterial community composition differed from activated sludge, demonstrating that laboratory enrichment was selective. Still, PHB was synthesized to near-activated sludge levels. Ag salts altered final bacterial communities, although MNMs did not. PHB biosynthesis was diminished with Ag (salt or MNMs), indicating the potential for Ag-MNMs to physiologically impact EBPR through the effects of dissolved Ag ions on PHB producers. |
| سلسلة جزيئية: | GEO GSE63781 |
| المشرفين على المادة: | 0 (Polyesters) 0 (RNA, Ribosomal, 16S) 0 (Sewage) 0 (Waste Water) 0 (poly(4-hydroxybutanoate)) 15FIX9V2JP (titanium dioxide) 3M4G523W1G (Silver) D1JT611TNE (Titanium) |
| تواريخ الأحداث: | Date Created: 20141120 Date Completed: 20150727 Latest Revision: 20221207 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1021/es504117x |
| PMID: | 25409530 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 1520-5851 |
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| DOI: | 10.1021/es504117x |