scholarly journals DEFINITIVE SCREENING DESIGN FOR THE OPTIMIZATION OF FLEXOGRAPHIC WATER-BASED CYAN DYE REMOVAL FROM AQUEOUS SOLUTION BY nZVI-INDUCED FENTON PROCESS

2018 ◽  
Author(s):  
Vesna Kecić ◽  
◽  
Miljana Prica ◽  
Đurđa Kerkez ◽  
Ognjan Lužanin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Dye Removal ◽  
Fenton Process ◽  
Screening Design ◽  
Water Based ◽  
Definitive Screening ◽  
Definitive Screening Design

scholarly journals Fenton-like oxidation of flexographic water-based key (black) dye: a definitive screening design optimization

2020 ◽  
Author(s):  
Vesna Gvoić ◽  
◽  
Miljana Prica ◽  
Đurđa Kerkez ◽  
Ognjan Lužanin ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Ph Value ◽  
Water Remediation ◽  
Process Conditions ◽  
Model Parameters ◽  
H2o2 Concentration ◽  
Screening Design ◽  
Operation Conditions ◽  
Definitive Screening ◽  
Definitive Screening Design

Fenton oxidation process has obtained large applicative use for efficient water remediation, whereby overall reaction efficiency could be improved by developing advanced Fenton catalysts. In order to synthesize iron nanoparticles with higher catalytic activity, a simple and eco-friendly method using FeCl3 and aqueous plant extract (oak leaves) was applied in this paper. The nano zero valent iron particles were used as a catalyst in Fenton treatment to remove organic dye from aqueous solution. The objective of this study was to optimize Fenton-like process for the removal of black printing dye using a recently developed design of experiment method - definitive screening design. This novel design framework significantly reduces the number of experiments required to estimate the model parameters and to establish the optimum operation conditions. The experiments were carried out in a batch mode technique, investigating the influence of dye concentration (20 - 180 mgL-1), nanoparticles dosage (0.75 - 60 mgL-1), H2O2 concentration (1 - 11 mM) and pH value of the solution (2 - 10) on the decolorization efficiency. The Fenton-like process resulted with 79% of dye removal from aqueous solution under the optimal process conditions: dye concentration of 180 mgL-1, nanoparticles dosage of 0.75 mgL-1, H2O2 concentration of 1 mM and pH of 2. Increasing the pH value to slightly acidic or near neutral (5-7) medium resulted with slight decrease in the process efficiency (69.14 - 62.63%), but a limitation in the form of sludge generation is noticeable.

scholarly journals Application of advanced oxidation process for the removal of synthetic water-based printing dye and microplastics from aqueous solution

2020 ◽  
Author(s):  
Miljana Prica ◽  
◽  
Aleksandra Tubić ◽  
Maja Lončarski ◽  
Vesna Gvoić ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Management Practices ◽  
Advanced Oxidation Process ◽  
Ph Value ◽  
Wastewater Reuse ◽  
Wastewater Management ◽  
Synthetic Dyes ◽  
Screening Design ◽  
Water Based ◽  
Definitive Screening

Starting from the assumption that wastewater treatments can have a significant impact on the interactions between microplastics (MPs) and various pollutants in different matrices, a focus must be directed on examination of classic and redesigned treatments to remove synthetic dyes in the presence of MPs from wastewater. This paper investigates the potential application of Fenton-like process for the removal of water-based printing dye (Cyan) from aqueous solution containing MPs in a form of granulated polyethylene (PEg). The influence of five quantitative parameters on decolorization efficiency was investigated: initial dye concentration (20-180 mgL-1), nano zero valent iron (nZVI) dosage (0.75-60 mgL-1), PEg concentration (1-10 gL-1), hydrogen-peroxide concentration (1-11 mM) and pH value (2-10). A novel statistical approach, definitive screening design, resulted with the optimization process which yielded highest removal efficiency of 92% under following conditions: initial dye concentration of 155 mgL-1, nZVI dosage of 55 mgL-1, PEg concentration of 2.35 gL-1, H2O2 concentration of 2 mM and pH value 2.5. Available data indicate that in the future, wastewater containing MPs will dictate ways to reuse this water in terms of closing the water material cycle and reducing environmental pollution. Therefore, the industrial wastewater reuse is an important component of sustainable wastewater management practices, namely, water resource augmentation and pollutant reduction.

scholarly journals Application of a definitive screening design for the synthesis of a charge-transfer complex of sparfloxacin with tetracyanoethylene: spectroscopic, thermodynamic, kinetics, and DFT computational studies

RSC Advances ◽  
2019 ◽  
Vol 9 (43) ◽  
pp. 24722-24732 ◽  
Author(s):  
Ahmed S. El-Shafie ◽  
Areej W. Khashan ◽  
Yasser H. A. Hussein ◽  
Marwa El-Azazy
Keyword(s):  
Charge Transfer ◽  
Charge Transfer Complex ◽  
Computational Studies ◽  
Screening Design ◽  
Definitive Screening ◽  
A Charge ◽  
Definitive Screening Design

A spectrochemical approach was adopted to study the charge-transfer (CT) complexation of sparfloxacin (SFX) with tetracyanoethylene (TCNE). Definitive screening design (DSD) was used to investigate the reaction variables.

scholarly journals Investigation of direct biodiesel production from wet microalgae using definitive screening design

2019 ◽  
Vol 158 ◽  
pp. 1149-1154 ◽  
Author(s):  
Charles Felix ◽  
Aristotle Ubando ◽  
Cynthia Madrazo ◽  
Sylviana Sutanto ◽  
Phuong Lan Tran-Nguyen ◽  
...  
Keyword(s):  
Biodiesel Production ◽  
Screening Design ◽  
Definitive Screening ◽  
Wet Microalgae ◽  
Definitive Screening Design

scholarly journals Definitive screening designs for multistep kinetic models in flow

2019 ◽  
Vol 4 (9) ◽  
pp. 1565-1570 ◽  
Author(s):  
Christopher A. Hone ◽  
Alistair Boyd ◽  
Anne O'Kearney-McMullan ◽  
Richard A. Bourne ◽  
Frans L. Muller
Keyword(s):  
Kinetic Parameters ◽  
Kinetic Models ◽  
Flow Reactor ◽  
Time Frame ◽  
Accurate Estimation ◽  
Screening Designs ◽  
Screening Design ◽  
Definitive Screening ◽  
Short Time ◽  
Definitive Screening Design

A definitive screening design (DSD) combined with reaction profiling was conducted using a flow reactor, in a short time frame, for the accurate estimation of kinetic parameters.

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