Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna

Molybdenum, an emerging pollutant, has just recently been demonstrated to be toxic to spermatogenesis in several animal model systems. Hence its removal and studies on the kinetics of removal is very important at a biotechnological point of view. In this work we study the reduction kinetics of a mol...

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Main Authors:	Halmi, Mohd Izuan Effendi, Ahmad, Siti Aqlima, Syed, Mohd. Arif, Shamaan, Nor Aripin, Abd. Shukor, Mohd. Yunus
Format:	Article
Published:	Hibiscus Publisher 2014
Online Access:	http://psasir.upm.edu.my/id/eprint/34454/ http://psasir.upm.edu.my/id/eprint/34454/

id	upm-34454
recordtype	eprints
spelling	upm-344542015-12-15T02:19:47Z http://psasir.upm.edu.my/id/eprint/34454/ Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna Halmi, Mohd Izuan Effendi Ahmad, Siti Aqlima Syed, Mohd. Arif Shamaan, Nor Aripin Abd. Shukor, Mohd. Yunus Molybdenum, an emerging pollutant, has just recently been demonstrated to be toxic to spermatogenesis in several animal model systems. Hence its removal and studies on the kinetics of removal is very important at a biotechnological point of view. In this work we study the reduction kinetics of a molybdenum-reducing bacterium using kinetic models such as Haldane, Monod, Teissier, Andrews and Noack, Hinshelwood, Moser, Aiba, Webb (Edward), Yano and Koga, Han and Levenspiel and Luong and evaluated the accuracy of the fitted model using statistical analysis such as Root Mean Square (RMSE), adjusted Coefficient of Determination (R2), corrected Akaike Information Criterion (AICc), Bias Factor, Accuracy Factor and F-test. Statistical analysis shows that the best model was Luong with low values for RMSE and AICc, highest adjusted R2 values, F-test and with Bias Factor and Accuracy Factor nearest to unity (1.0). The calculated value for the Luong’s constants qmax, Ks, Sm, and n were 27.303 hr-1, 115.8 mM, 57.83 mM and 1.405, respectively. The true qmax where the gradient for the slope is zero was approximately 3.38 h-1 at 30 mM molybdenum. The results indicate that the exhaustive use of mathematical models provides new understanding of the way molybdenum inhibits production into molybdenum blue in bacterium. This can provide new knowledge on ways to predict progress of molybdenum reduction in the laboratory and during bioremediation works. Hibiscus Publisher 2014 Article NonPeerReviewed Halmi, Mohd Izuan Effendi and Ahmad, Siti Aqlima and Syed, Mohd. Arif and Shamaan, Nor Aripin and Abd. Shukor, Mohd. Yunus (2014) Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna. Bulletin of Environmental Science and Management, 2 (1). pp. 24-29. ISSN 2289-5876 http://journal.hibiscuspublisher.com/index.php/BESM/article/view/116
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Putra Malaysia
building	UPM Institutional Repository
collection	Online Access
description	Molybdenum, an emerging pollutant, has just recently been demonstrated to be toxic to spermatogenesis in several animal model systems. Hence its removal and studies on the kinetics of removal is very important at a biotechnological point of view. In this work we study the reduction kinetics of a molybdenum-reducing bacterium using kinetic models such as Haldane, Monod, Teissier, Andrews and Noack, Hinshelwood, Moser, Aiba, Webb (Edward), Yano and Koga, Han and Levenspiel and Luong and evaluated the accuracy of the fitted model using statistical analysis such as Root Mean Square (RMSE), adjusted Coefficient of Determination (R2), corrected Akaike Information Criterion (AICc), Bias Factor, Accuracy Factor and F-test. Statistical analysis shows that the best model was Luong with low values for RMSE and AICc, highest adjusted R2 values, F-test and with Bias Factor and Accuracy Factor nearest to unity (1.0). The calculated value for the Luong’s constants qmax, Ks, Sm, and n were 27.303 hr-1, 115.8 mM, 57.83 mM and 1.405, respectively. The true qmax where the gradient for the slope is zero was approximately 3.38 h-1 at 30 mM molybdenum. The results indicate that the exhaustive use of mathematical models provides new understanding of the way molybdenum inhibits production into molybdenum blue in bacterium. This can provide new knowledge on ways to predict progress of molybdenum reduction in the laboratory and during bioremediation works.
format	Article
author	Halmi, Mohd Izuan Effendi Ahmad, Siti Aqlima Syed, Mohd. Arif Shamaan, Nor Aripin Abd. Shukor, Mohd. Yunus
spellingShingle	Halmi, Mohd Izuan Effendi Ahmad, Siti Aqlima Syed, Mohd. Arif Shamaan, Nor Aripin Abd. Shukor, Mohd. Yunus Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna
author_facet	Halmi, Mohd Izuan Effendi Ahmad, Siti Aqlima Syed, Mohd. Arif Shamaan, Nor Aripin Abd. Shukor, Mohd. Yunus
author_sort	Halmi, Mohd Izuan Effendi
title	Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna
title_short	Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna
title_full	Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna
title_fullStr	Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna
title_full_unstemmed	Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna
title_sort	mathematical modelling of the molybdenum reduction kinetics in bacillus pumilus strain lbna
publisher	Hibiscus Publisher
publishDate	2014
url	http://psasir.upm.edu.my/id/eprint/34454/ http://psasir.upm.edu.my/id/eprint/34454/
first_indexed	2018-09-07T16:13:22Z
last_indexed	2018-09-07T16:13:22Z
_version_	1610965899588665344

Mathematical modelling of the molybdenum reduction kinetics in Bacillus pumilus strain Lbna

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