INFLUENCE OF HEAVY METALS ON MICROBIAL GROWTH KINETICS INCLUDING LAG TIME: MATHEMATICAL MODELING AND EXPERIMENTAL VERIFICATION

Date

2009-10-01

Author

Şengör, Sema Sevinç
Gikas, Petros
Ginn, Timothy R.
Peyton, Brent
Sani, Rajesh K.
Spycher, Nicolas F.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

109
views

0
downloads

Heavy metals can significantly affect the kinetics of substrate biodegradation and microbial growth, including lag times and specific growth rates. A model to describe microbial metabolic lag as a function of the history of substrate concentration has been previously described by Wood et al. (Water Resour Res 31: 553-563) and Ginn (Water Resour Res 35: 1395-1408). In the present study, this model is extended by including the effect of heavy metals on metabolic lag by developing an inhibitor-dependent functional to account for the metabolic state of the microorganisms. The concentration of the inhibiting metal is explicitly incorporated into the functional. The validity of the model is tested against experimental data on the effects of zinc on Pseudomonas species isolated from Lake Coeur d'Alene sediments, Idaho, USA, as well as the effects of nickel or cobalt on a mixed microbial culture collected from the aeration tank of a wastewater treatment plant in Athens, Greece. The simulations demonstrate the ability to incorporate the effect of metals on metabolism through lag, yield coefficient, and specific growth rates. The model includes growth limitation due to insufficient transfer of oxygen into the growth medium.

URI

https://hdl.handle.net/11511/93951

Journal

ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY

DOI

https://doi.org/10.1897/08-273.1

Collections

Department of Environmental Engineering, Article

Suggestions

OpenMETU
Core

Influence of boron toxicity on global expression profiles in wheat (Triticum aestivum L.) Kayihan, C.; Oz, M. T.; EYİDOĞAN, FÜSUN; YÜCEL, MUSTAFA; Öktem, Hüseyin Avni (2012-09-23) Excess boron (B) is known to negatively affect plant growth. However, the molecular mechanism of toxicity in plants is not satisfactory elucidated. In this study, global expression differences in wheat (Triticum aestivum L. cv. Atay-85 and Bolal-2973) leaves and roots under B toxicity were investigated using DNA microarrays. Eight day old aseptically grown seedlings were subjected to 5 mM H3BO3 for 5 days. Total RNAs from leaf or root tissues were isolated and checked by Bioanalyzer 2100. Expression profile...
Impacts of nutrients on periphyton growth and periphyton - macroinvertebrates interactions in shallow lakes : a mesocosm experiment Filiz, Nur; Beklioğlu, Meryem; Department of Biology (2012) Periphyton biomass on artificial strips was observed monthly to see the impacts of nutrient differences on periphyton and periphyton-macroinvertebrates interaction. The experiment was conducted for four months in a mesocosm which were runned at six countries at the same time and with the same steps. Eight enclosures at two meters depth were used that four of them had high nutrient level and the other four had low nutrient level. Sediment, macrophyte, fish, plankton, benthic invertebrates and water were adde...
Effect of high hydrostatic pressure on seed germination, microbial quality, anatomy-morphology and physiological characteristics of garden cress (Lepidium sativum) seedlings İŞLEK, Cemil; Altuner, Ergin Murat; Ceter, Talip; Alpas, Hami (Informa UK Limited, 2013-06-01) High hydrostatic pressure is a non-thermal food processing technology that is found to increase the percentage of germination, decrease the germination time and improve the microbial quality of seeds. In this study, pressures of 100-400MPa for 10min at 30 degrees C are used to compare the percentage of germination, the microbial quality of seeds, chlorophyll a and b, and total phenolic compounds concentrations in seedlings, and the anatomy-morphology characteristics of garden cress. Enhanced reductions of t...
Effect of different stresses on trehalose levels in Rhizopus oryzae Uyar, Ebru Ozer; Hamamcı, Haluk; TÜRKEL, SEZAİ (2010-08-01) Rhizopus oryzae accumulates and degrades trehalose in response to environmental stress conditions such as heat, osmotic stress, nitrogen starvation and pH. When heat stress was applied to R. oryzae, the trehalose content of the cells was increased from 0.9 to 4.8 mg/g dw and when the stress was relieved it decreased back to 1.1 mg/g dw. Under osmotic stress and nitrogen starvation, trehalose content was increased by 3.5 and 3 fold, respectively. The decrease in external pH increased trehalose level up to 2....
Effect of boron and iron stress on phytosiderophore production in barley İnce, Yetkin Çaka; Yücel, Ayşe Meral; Department of Biology (2015) Boron and iron are essential nutrients for growth and development of higher plants. Deficiency and toxicity of them cause significant changes in physiological, cellular and molecular make-up of plants. Iron uptake in barley is mainly achieved by production and release of phytosiderophores to the environment. On the other hand, production of phytosiderophores are affected by concentrations of boron and iron. Four enzymes which function in phytosiderophore hydroxymugineic acid (HMA) production namely NAS, NAA...

Citation Formats

S. S. Şengör, P. Gikas, T. R. Ginn, B. Peyton, R. K. Sani, and N. F. Spycher, “INFLUENCE OF HEAVY METALS ON MICROBIAL GROWTH KINETICS INCLUDING LAG TIME: MATHEMATICAL MODELING AND EXPERIMENTAL VERIFICATION,” ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, vol. 28, no. 10, pp. 2020–2029, 2009, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/93951.