Nonlinear regression analysis and response surface modeling of Cr (VI) removal from synthetic wastewater by an agro-waste Cocos Nucifera: Box-Behnken Design(BBD)
IR@CIMFR: CSIR-Central Institute of Mining and Fuel Research, Dhanbad
View Archive Info| Field | Value | |
| Title |
Nonlinear regression analysis and response
surface modeling of Cr (VI) removal from synthetic
wastewater by an agro-waste Cocos Nucifera: Box-Behnken Design(BBD)
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| Creator |
Kumari, Binu
Tiwary, Rajani Kant Singh, Krishna Murari Prasad |
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| Subject |
Enviornmental Management
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| Description |
In this study mixture of coconut shell and coir was used for Cr (VI) removal from synthetic wastewater and statistical tool Response Surface Modeling (RSM) was applied to optimize process parameters. The solution pH (2–6), reaction time (20–100 minutes) and adsorbent quantity (0.03–0.2 g)
was optimized to find the maximum response of Cr (VI) removal using statistical Box-Behnken
design (BBD) software. The equilibrium data obtained by the batch experiment were analyzed by
ANOVA and found fitted in a second-order polynomial equation through multiple regression analysis. The optimum value of pH, adsorbent quantity and reaction time for 99% of Cr(VI) was found
as 2, 0.1 g and 100 minutes, respectively. By using non-linear regression method it was found that
Freundlich isotherm and Pseudo-second-order kinetic with high correlation coefficient (R2
), low Chisquare (v2
) and root mean squares errors (RMSE), best describe the adsorption of Cr (VI) on mixture
of coconut shell and coir (MCSC) surface. Positive enthalpy (DH�) and negative Gibbs free energy
(DGo
) values confirm the endothermic and spontaneous nature of adsorption process. Pre and post
adsorption phenomenon was confirmed by characterization of adsorbent using AFM, FTIR, SEM,
and EDX analysis. The adsorbent MCSC has regenerative property and can be reused 3–4 times
after treating with alkaline medium (0.2 N NaOH) and offered more than 60% removal of Cr (VI) at
the fourth cycle. It can be inferred based on this study that MCSC is an effective adsorbent for Cr
(VI) removal and can be used on an industrial scale for social and environmental benefit
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| Publisher |
Taylor and Francis
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| Date |
2020-12-21
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| Type |
Article
PeerReviewed |
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| Identifier |
Kumari, Binu and Tiwary, Rajani Kant and Singh, Krishna Murari Prasad (2020) Nonlinear regression analysis and response surface modeling of Cr (VI) removal from synthetic wastewater by an agro-waste Cocos Nucifera: Box-Behnken Design(BBD). INTERNATIONAL JOURNAL OF PHYTOREMEDIATION.
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| Relation |
http://cimfr.csircentral.net/2288/
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