Multivariate response optimization of Pb(II) extraction from wastewater using Box-Behnken design

Air separation is a process of separating primary components from the atmospheric air. Development of membrane technologies plays a key role in air separation. Multi-layer polymeric nanocomposite membranes have been developed by a novel technique using Polyacrylonitrile (PAN) and cellulose acetate (CA) along with nano silica particles (SiO2) to obtain a higher oxygen selectivity and permeability. For the construction of the multilayer membrane, the Box-Behnken design has been used by employing three independent variables namely PAN Electro spinning time, the SiO2 percentage in the PAN polymer and CA/PEG polymer concentration. The developed membranes have been characterized for its surface morphology and physical properties. Along with the analysis of compound desirability, the results were also subject to statistical analysis in order to form regression equations. The electro spun fiber diameter increases along with the concentration of SiO2 nanoparticles and the range is from 50 nm to 400 nm. Moreover, the maximum pore size on the surface of the membrane lies between 200 to 400 nm whereas the maximum percentage of oxygen purity obtained is 48 with the permeate flux of 5.45 cm3/cm2/min.

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Optimisation of the Oil Extraction from Nigella sativa Seeds Using Response Surface Methodology

Revista de Chimie ◽

10.37358/rc.17.2.5447 ◽

2017 ◽

Vol 68 (2) ◽

pp. 331-336

Author(s):

Gabriela Isopencu ◽

Mirela Marfa ◽

Iuliana Jipa ◽

Marta Stroescu ◽

Anicuta Stoica Guzun ◽

...

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Nigella Sativa ◽

Polynomial Equation ◽

Herbaceous Plant ◽

Box Behnken Design ◽

Pareto Analysis ◽

Black Cumin ◽

Mediterranean Countries ◽

Experimental Values

Nigella sativa, also known as black cumin, an annual herbaceous plant growing especially in Mediterranean countries, has recently gained considerable interest not only for its use as spice and condiment but also for its healthy properties of the fixed and essential oil and its potential as a biofuel. Nigella sativa seeds fixed oil, due to its high content in linoleic acid followed by oleic and palmitic acid, could be beneficial to human health. The objective of this study is to determine the optimum conditions for the solvent extraction of Nigella sativa seeds fixed oil using a three-level, three-factor Box-Behnken design (BBD) under response surface methodology (RSM). The obtained experimental data, fitted by a second-order polynomial equation were analysed by Pareto analysis of variance (ANOVA). From a total of 10 coefficients of the statistical model only 5 are important. The obtained experimental values agreed with the predicted ones.

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Multi Response Optimization of Cutting and Tool Geometry Parameters in Hard Turning of Aisi 52100 Steel-Topsis Approach

SSRN Electronic Journal ◽

10.2139/ssrn.3654101 ◽

2019 ◽

Author(s):

Umamaheswarrao P ◽

Ranga Raju D. ◽

Suman KNS ◽

Ravi Sankar B.

Keyword(s):

Hard Turning ◽

Tool Geometry ◽

Aisi 52100 ◽

Aisi 52100 Steel ◽

Response Optimization ◽

Topsis Approach

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