Cotton Dyeing with Vat Dyes using Alkaline Pectinase and Iron (II) Salt

Use of sodium hydrosulfite in the dyeing of cotton with vat dyes is criticized for generation of sulfur compounds leading to air and water pollution. In this study, attempts were made to dye cotton with alkaline pectinase along with iron (II) salt as an alternative formulation. A 43 Box-Behnken design was used for statistical analysis of performance for this new reducing system and to obtain optimum parameters for cotton dyeing. The results showed that alkaline pectinase along with iron (II) salt was quite effective in developing comparable dyebath potential, dye receptivity on cotton with comparable dye strength, and colorfastness, as compared to the hydrosulfite-based reducing system. Dyebath stability in presence and absence of dye also showed superior results compared to that of the hydrosulfite system.

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Eco-Friendly Vat Dyeing of Cotton Using Alkaline Iron (II) Salt as Reducing Agent

Tekstilec ◽

10.14502/tekstilec2020.64.305-320 ◽

2020 ◽

Vol 63 (4) ◽

pp. 305-320

Author(s):

Omender Kr ◽

◽

J. N. Chakraborty ◽

Keyword(s):

Reduction Potential ◽

Potential Surface ◽

Cotton Fabrics ◽

Sodium Sulphate ◽

Reducing Agent ◽

Vat Dyes ◽

Box Behnken Design ◽

Optimum Parameters ◽

Colour Strength ◽

Sulphate Sulphur

Sodium hydrosulphite is used commercially as the reducing agent for vat dyes in the dyeing of cotton. Large amounts of sodium sulphate, sulphur oxyanion and toxic sulphite are produced during the dyeing due to the dissociation of sodium hydrosulphite leading to severe air and water pollution. This research focuses on the use of alkaline iron (II) salt as the reducing agent for vat dyeing on cotton fabrics through a complete replace¬ment of hydrosulphite. The 34 Box-Behnken design was used to achieve optimum parameters and statistically analyse the performance of the new reducing system. The results showed that the alkaline iron (II) salt system was relatively effective in developing a comparable dyebath reduction potential, surface colour strength of cotton and colourfastness, if compared to the hydrosulphite-based reducing system. The dyebath stability in the presence and absence of the dye also showed superior results compared to that of the hydrosulphite system. Hence, it can be said that a complete substitution of sodium hydrosulphite with alkaline iron (II) salt is possible.

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EXPERIMENTAL DESIGN FOR SIMULTANEOUS PRODUCTION OF PHB, MESOPHILIC PROTEASES AND LIPASES

IIUM Engineering Journal ◽

10.31436/iiumej.v12i2.137 ◽

2011 ◽

Vol 12 (2) ◽

pp. 155-184 ◽

Cited By ~ 2

Author(s):

Amro Abd al fattah Amara

Keyword(s):

Statistical Analysis ◽

Experimental Design ◽

Bacillus Pumilus ◽

Bacillus Species ◽

Bacillus Sp ◽

Box Behnken Design ◽

Simultaneous Production ◽

The Media ◽

Excel Solver

ABSTRACT: Bacillus species are able to produce PHB, Proteases and Lipases. Bacillus subtilius, Bacillus pumilus, Bacillus therigienesis and Bacillus sp. were used. Plackett-Burman, Box-Behnken design and the Excel solver were used to optimize the production. The statistical analysis of the results proved insignificant relationship between the media compositions and the responses. The results clearly proved a competition between the production of PHB, Proteases and Lipases. Meanwhile systematic experimental design succeeded to minimize this competition. The maximum gained PHB in this study were 16.48 g/l/48 hr. In case of Proteases and Lipases were 534, and 22.56 Units/ml/48 h respectively. The strategies used in this study are recommended for simultaneous production of PHB and proteases. For some extend lipases produced too.

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Catalytic activation and application of micro-spherical carbon derived from hydrothermal carbonization of lignocellulosic biomass: statistical analysis using Box–Behnken design

RSC Advances ◽

10.1039/c5ra26189a ◽

2016 ◽

Vol 6 (104) ◽

pp. 102680-102694 ◽

Cited By ~ 12

Author(s):

Z. Z. Chowdhury ◽

S. B. Abd Hamid ◽

Md. M. Rahman ◽

R. F. Rafique

Keyword(s):

Activated Carbon ◽

Statistical Analysis ◽

Potassium Hydroxide ◽

Chemical Activation ◽

Hydrothermal Carbonization ◽

Corchorus Olitorius ◽

Box Behnken Design ◽

Catalytic Activation ◽

Spherical Carbon ◽

Physico Chemical

Activated carbon was produced by physico-chemical activation of hydrothermally carbonized dried stem derived from Corchorus olitorius, commonly known as Jute (JS), using potassium hydroxide (KOH) as an activation agent.

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Statistical Analysis of Water Pollution Levels at various Locations in Pune

2018 IEEE Punecon ◽

10.1109/punecon.2018.8745435 ◽

2018 ◽

Author(s):

Jyoti Kumari ◽

Madhav Sanap

Keyword(s):

Water Pollution ◽

Statistical Analysis ◽

Pollution Levels

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Statistical Analysis of Performance Goals Effect to Lecturer Work Achievement in Higher Education

2018 2nd East Indonesia Conference on Computer and Information Technology (EIConCIT) ◽

10.1109/eiconcit.2018.8878571 ◽

2018 ◽

Cited By ~ 1

Author(s):

Muhdi B. Hi. Ibrahim ◽

Muhammad Taher Jufri ◽

Sitti Nur Alam ◽

Zakaria ◽

Muhammad Aldrin Akbar ◽

...

Keyword(s):

Higher Education ◽

Statistical Analysis ◽

Performance Goals ◽

Analysis Of Performance

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A Box-Behnken Optimized Methodology for the Quantification of Diclofenac using a Carbon Paste-Multiwalled Carbon Nanotubes Electrode

Current Analytical Chemistry ◽

10.2174/1573411014666180423151749 ◽

2019 ◽

Vol 15 (3) ◽

pp. 294-304 ◽

Cited By ~ 3

Author(s):

Miriam Franco Guzmán ◽

Luis Humberto Mendoza Huizar ◽

Carlos Andrés Galán Vidal ◽

Gabriela Roa Morales ◽

Giaan A. Álvarez Romero

Keyword(s):

Statistical Analysis ◽

Differential Pulse Voltammetry ◽

Heart Diseases ◽

Differential Pulse ◽

Carbon Paste ◽

Multiwalled Carbon ◽

Box Behnken Design ◽

Frequent Consumption ◽

Pulse Voltammetry ◽

High Concentrations

Background: Diclofenac is a widely used nonsteroidal anti-inflammatory drug. Recent studies have shown that frequent consumption of this drug in high concentrations can cause heart diseases, so strict control of diclofenac’s quantity in commercial drugs is necessary. This paper presents the development of an optimized voltammetric methodology for the quantification of diclofenac, which offers some advantages over other electrochemical and accepted methods. Objective: Optimize with a Box-Behnken design the differential pulse voltammetry parameters towards the quantification of diclofenac in pharmaceutical samples. Methods: Diclofenac behavior in the working electrode was evaluated by cyclic voltammetry, in order to stablish the best conditions for diclofenac’s quantification. A Box-Behnken design was then used to optimize the differential pulse voltammetry parameters and stablish the analytical behavior of the proposed methodology. Commercial tablets were prepared for analysis according to the Pharmacopeia, the DPV optimized methodology was used to quantify diclofenac in the samples, and the results were statistically compared with those obtained with the official methodology. Results: After optimization, the analytical parameters found were: correlation coefficient of 0.998, detection limit of 0.001 µM, quantification limit of 0.0033 µM and sensitivity of 0.299 µA.µM-1. The statistical analysis showed there were no significant differences between the results obtained with the proposed methodology and those obtained with the official methodology. Conclusion: The statistical analysis showed that the proposed methodology is as reliable as the official spectrophotometric one for the quantification of diclofenac in commercial drugs, with very competitive analytical parameters, and even better to others found with more complex electrodes.

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