Anaerobic degradation of nonylphenol in subtropical mangrove sediments
| Autor: | S.Y. Yuan, Zhong-Jun Lu, Bea-Ven Chang |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Geologic Sediments
Octanols Environmental Engineering Health Toxicology and Mutagenesis Taiwan Endocrine Disruptors chemistry.chemical_compound Bacteria Anaerobic Phenols Environmental Chemistry Humic acid Organic matter Sulfate-reducing bacteria Waste Management and Disposal chemistry.chemical_classification biology Chemistry Environmental engineering Biodegradation biology.organism_classification Pollution Methanogen Nonylphenol Kinetics Biodegradation Environmental Microbial population biology Environmental chemistry Rhizophoraceae Pyruvic acid |
| Zdroj: | Journal of hazardous materials. 165(1-3) |
| ISSN: | 1873-3336 |
| Popis: | Nonylphenol (NP) is known as an endocrine disruptor and has consequently drawn much environmental concern. We investigated the effects of various factors on the anaerobic degradation of NP and characterized the structures of microbial communities in mangrove sediments collected at five sites along the Tanshui River in northern Taiwan. NP anaerobic degradation rate constants (k1) and half-lives (t1/2) ranged from 0.008 to 0.013 1/day and 53.3 to 86.6 days, respectively. The addition of NaCl (1%, 2%), zero-valent iron (10 g/L), humic acid (0.5 g/L), cellulose (0.96 mg/L), brij 30 (55 μM) and brij 35 (91 μM) enhanced NP anaerobic degradation. However, the addition of NaCl (3%), acetate (20 mM), lactate (20 mM), pyruvate (20 mM), and humic acid (5 g/L) inhibited NP anaerobic degradation. Sulfate-reducing bacteria, methanogen, and eubacteria are involved in the degradation of NP, sulfate-reducing bacteria being a major component of the sediment. Our results also show that the addition of various substrates changed the microbial community in mangrove sediments. Also noted was the presence of 2-butyl-1-octanol, an intermediate product resulting from the anaerobic degradation of NP accumulated in the sediments. |
| Databáze: | OpenAIRE |
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