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Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems

Response surface methodology (RSM) involving central composite design (CCD) was employed to obtain optimal conditions for Cr(VI) wastewater treatment by Cr(VI) reducing biofilm systems. On the basis of a CCD, RSM was used to determine the effect of initial metal concentrations (40-100mg/L), nutrient...

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Main Authors: Mohammed, Nurfadilah, Ahmad, Wan Azlina
Format: Article
Published: Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia 2010
Subjects:
Q Science (General)
Online Access:http://eprints.utm.my/id/eprint/25813/
http://www.mjfas.utm.my/index.php/mjfas/article/view/169
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spelling my.utm.258132018-03-22T10:50:57Z http://eprints.utm.my/id/eprint/25813/ Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems Mohammed, Nurfadilah Ahmad, Wan Azlina Q Science (General) Response surface methodology (RSM) involving central composite design (CCD) was employed to obtain optimal conditions for Cr(VI) wastewater treatment by Cr(VI) reducing biofilm systems. On the basis of a CCD, RSM was used to determine the effect of initial metal concentrations (40-100mg/L), nutrient supplementations (10-20%) and flowrate (3-6mL/min) on the levels of response, i.e. Cr(VI) reduction efficiency. A set of 20 experimental runs were needed for optimizing of the operating conditions. Quadratic regression models with estimated coefficients were developed to describe the Cr(VI) reduction. Analysis of variance (ANOVA) showed a high coefficient of determination (R2) value of 0.9941, thus ensuring a satisfactory adjustment of the second-order regression model with the experimental data. Cr(VI) reduction had significant effect on all the three dependent variables. The experimental results show that Cr(VI)-reducing biofilm systems could effectively reduce Cr(VI), 100% at the optimum conditions of initial metal concentration of 100 mg/L, nutrient supplementation of 20% and flowrate of 3mL/min. The experimental observations were in reasonable agreement with the modelled values. Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia 2010 Article PeerReviewed Mohammed, Nurfadilah and Ahmad, Wan Azlina (2010) Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems. Journal of Fundamental Sciences, 6 (1). pp. 15-21. ISSN 2289-5981 (Print); 2289-599X (Online) http://www.mjfas.utm.my/index.php/mjfas/article/view/169
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science (General)
spellingShingle Q Science (General)
Mohammed, Nurfadilah
Ahmad, Wan Azlina
Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems
description Response surface methodology (RSM) involving central composite design (CCD) was employed to obtain optimal conditions for Cr(VI) wastewater treatment by Cr(VI) reducing biofilm systems. On the basis of a CCD, RSM was used to determine the effect of initial metal concentrations (40-100mg/L), nutrient supplementations (10-20%) and flowrate (3-6mL/min) on the levels of response, i.e. Cr(VI) reduction efficiency. A set of 20 experimental runs were needed for optimizing of the operating conditions. Quadratic regression models with estimated coefficients were developed to describe the Cr(VI) reduction. Analysis of variance (ANOVA) showed a high coefficient of determination (R2) value of 0.9941, thus ensuring a satisfactory adjustment of the second-order regression model with the experimental data. Cr(VI) reduction had significant effect on all the three dependent variables. The experimental results show that Cr(VI)-reducing biofilm systems could effectively reduce Cr(VI), 100% at the optimum conditions of initial metal concentration of 100 mg/L, nutrient supplementation of 20% and flowrate of 3mL/min. The experimental observations were in reasonable agreement with the modelled values.
format Article
author Mohammed, Nurfadilah
Ahmad, Wan Azlina
author_facet Mohammed, Nurfadilah
Ahmad, Wan Azlina
author_sort Mohammed, Nurfadilah
title Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems
title_short Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems
title_full Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems
title_fullStr Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems
title_full_unstemmed Application of Response Surface Methodology (RSM) for optimizing removal of Cr(VI) wastewater using Cr(VI)-reducing biofilm systems
title_sort application of response surface methodology (rsm) for optimizing removal of cr(vi) wastewater using cr(vi)-reducing biofilm systems
publisher Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia
publishDate 2010
url http://eprints.utm.my/id/eprint/25813/
http://www.mjfas.utm.my/index.php/mjfas/article/view/169
_version_ 1643647617133969408
score 13.211869

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