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Predicting 2,4-dichlorophenoxyacetic Acid ester transformation rates in periphyton-dominated ecosystems.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lewis, D. L. Kollig, Heinz P. Hall, Tara L. |
| Copyright Year | 1983 |
| Abstract | Using batch cultures, we determined transformation rate coefficients for microbial transformation of 2,4-dichlorophenoxyacetic acid butoxyethyl ester (2,4-DBE) in periphyton-dominated ecosystems. Rates of 2,4-DBE loss were measured over short periods of time (usually less than 10 h), and first-order transformation rate coefficients (k(1)) were determined under the specific conditions of low 2,4-DBE concentrations and no growth. Values for k(1) were divided by total plate counts and by biomass measured as ash-free dry weight to give second-order rate coefficients (k(b) and k(AFDW), respectively) for use in predictive models. Using periphyton attached to Teflon strips, we also determined second-order rate coefficients based on the ratio of colonized surface area to container volume (k(A)). Mean second-order rate coefficients were used to predict 2,4-DBE transformation rates in microcosms having diverse chemical and biological environments. The observed transformation rates among the microcosms were most accurately predicted by using k(A). |
| File Format | PDF HTM / HTML |
| DOI | 10.1128/aem.46.1.146-151.1983 |
| Alternate Webpage(s) | http://aem.asm.org/content/46/1/146.full.pdf |
| PubMed reference number | 16346336 |
| Alternate Webpage(s) | https://doi.org/10.1128/aem.46.1.146-151.1983 |
| Journal | Medline |
| Volume Number | 46 |
| Issue Number | 1 |
| Journal | Applied and environmental microbiology |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
