A composite polymer of polystyrene coated with poly(4-vinylpyridine) as a sorbent for the extraction of synthetic dyes from foodstuffs

2020 ◽  
Vol 12 (24) ◽  
pp. 3156-3163
Author(s):  
Mengxin Zhang ◽  
Tong Xu ◽  
Tian Tian ◽  
Yi Zhang ◽  
Xing Li ◽  
...  
Keyword(s):  
Synthetic Dyes ◽  
Composite Polymer ◽  
Environment Friendly ◽  
Food Dye ◽  
Dye Analysis ◽  
Pre Treatment

A poly(St-co-EGDMA)@poly(4-vinylpyridine-co-EGDMA) composite polymer enables sample pre-treatment in food dye analysis in an environment friendly and economical manner.

scholarly journals Process Development for the Effective Extraction of Curcumin from Curcuma Longa L (Turmeric)

2018 ◽  
Vol 7 (3.34) ◽  
pp. 151
Author(s):  
Vinosh Muthukumar P ◽  
Vaishnavi M ◽  
Theepapriys S ◽  
Saravanaraj A
Keyword(s):  
Process Parameters ◽  
Therapeutic Agent ◽  
Process Development ◽  
Curcuma Longa ◽  
Extraction Process ◽  
Environment Friendly ◽  
Pre Treatment ◽  
Microwave Assistance ◽  
Economical Process ◽  
Efficient Environment

Curcumin, the active, light sensitive agent, found in significant amounts in Curcuma longa L, is a potential therapeutic agent, possessing various pharmaceutical and industrial uses. The present extraction techniques, that are in application for many decades suffer from many economical and environmental demerits. This work is a prospective and noteworthy step towards conquering those disadvantages by means of optimizing the extraction process parameters and developing an energy efficient, environment friendly and economical process. In this study, various organic solvents were tested for their ability of curcumin extraction an concluded that acetone is most efficient. The process parameters like time, temperature and particle size were investigated and the minimum volume and concentration of solvent required were determined. Three potential pre-treatment process were analyzed for their capability to effectively distort the turmeric structure and aid in increasing the overall efficiency of the process. It was found that, employment of a mechanical distortion method by microwave assistance, and further followed by chemical disintegration, by means of enzymatic treatment, resulted in high attainable efficiency.  

scholarly journals Improved Dye Removal Ability of Modified Rice Husk with Effluent from Alkaline Scouring Based on the Circular Economy Concept

Processes ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 653 ◽  
Author(s):  
Nina Mladenovic ◽  
Petre Makreski ◽  
Anita Tarbuk ◽  
Katia Grgic ◽  
Blazo Boev ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Rice Husk ◽  
Circular Economy ◽  
Energy Efficient ◽  
Dye Removal ◽  
Plant Fibers ◽  
Environment Friendly ◽  
Pre Treatment ◽  
Colored Wastewater ◽  
Red Dye

To improve the ability of the rice husk to purify colored wastewater, effluent from the alkaline scouring of cotton yarn was used immediately after the scouring (without cooling and additionally added chemicals) in order to remove the non-cellulosic silicon-lignin shield from the rice husk’s surface. This rice husk, with 93.8 mg/g adsorption capacity, behaves similarly as the rice husk treated with an optimized alkaline scouring recipe consisting of 20 g/L NaOH, 2 mL/L Cotoblanc HTD-N and 1 mL/L Kemonecer NI at 70 °C for 30 min with an adsorption capacity of 88.9 mg/g of direct Congo red dye. Treating one form of waste (rice husk) with another (effluent from the alkaline scouring of cellulosic plant fibers), in an effort to produce a material able to purify colored effluent, is an elegant environment-friendly concept based on the circular economy strategy. This will result in a closed-loop energy-efficient process of the pre-treatment of cotton (alkaline scouring), modification of rice husk using effluent from the alkaline scouring, dyeing cotton fabrics and cleaning its colored effluents with modified rice husk without adding chemicals and energy for heating.

Characterization of Durian Seed Starch/PVOH Composite Hydrogel as a Potential Adsorbent for Removal of Hazardous Dyes

2014 ◽  
Vol 931-932 ◽  
pp. 286-290 ◽  
Author(s):  
W. Pimpa ◽  
C. Pimpa
Keyword(s):  
Adsorption Capacity ◽  
Synthetic Dyes ◽  
Order Kinetic ◽  
Solution Ph ◽  
Environment Friendly ◽  
Composite Hydrogels ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Durian Seed

The intention of this study was to prepare the environment friendly durian seed starch/polyvinyl alcohol (DSS/PVOH) composite hydrogels modified by chemical cross-linking with glutaraldehyde and to assess the adsorption potential of the DSS/PVOH composite hydrogels for the removal of the synthetic dyes from aqueous solution. The hydrogels were characterized by swelling behavior and scanning electron microscope (SEM). The effect of DSS content and initial dye solution pH on the adsorption capacity was studied conducting batch experiment system. The DSS/PVOH composite hydrogels consisting 3% DSS has optimum adsorption capacity of 3.411 mg/g (for methylene blue under the condition of pH 7) and 3.274 mg/g (for acid orange 8 under the condition of pH 2.5) at 24 h of contact time. The adsorptions were well fitted by the pseudo-second order kinetic model. It was indicated that the mechanism of removal predominant is effective for low dye concentrations, below 10 mg/l.

scholarly journals THE USAGE OF HENNA LEAVES (LAWSONIA INERMIS) FOR DYEING IN COTTON

2019 ◽  
Vol 1 (3) ◽  
pp. 23-25
Author(s):  
Rupashinii Thana Singam ◽  
Noraini BT Marsi ◽  
Nur Athirah BT Huzaisham ◽  
Muhammad Haikal B Mohd Fodzi
Keyword(s):  
Extraction Method ◽  
Harmful Effect ◽  
Cotton Fabrics ◽  
Synthetic Dyes ◽  
Distilled Water ◽  
Lawsonia Inermis ◽  
Natural Pigment ◽  
Environment Friendly ◽  
Physical Test ◽  
Dyeing Process

This research will be focused on the utilization of henna leaves for the dyeing in cotton fabrics. The formulation of henna dye is capable for the dyeing on the cotton replace the chemical dye. Moreover this research was conducted to reduce the usage of chemical dyes that contact the human body with the natural pigment using extraction method. However the usage of the synthetic dyes can reduce the harmful effect to the human health and environment. The henna leaves have various advantages because it is non carcinorgenic and environment friendly. The composition of natural dyes for the dyeing process on the cotton fabrics are 10g, 20g, 30g, 40g, 50g, 60g, 70g and 80g with 40ml of distilled water. The physical test involved was viscosity (ASTM D445-18). Furthemore, the 80g of henna leaves with 40ml of distilled water have higher viscosity compared to the other concentrations.

scholarly journals Exploratory study on sequestration of some essential metals by indigo carmine food dye

2010 ◽  
Vol 46 (4) ◽  
pp. 723-730 ◽  
Author(s):  
Thalita Boldrin Zanoni ◽  
Arnaldo Alves Cardoso ◽  
Maria Valnice Boldrin Zanoni ◽  
Antonio Aparecido Pupim Ferreira
Keyword(s):  
Indigo Carmine ◽  
Stable Complex ◽  
Stoichiometric Ratio ◽  
Buffer Solution ◽  
Carbonate Buffer ◽  
Food Dye ◽  
Pre Treatment ◽  
The Stability ◽  
Determination Of Copper

Indigo carmine forms a stable complex with different ions, and the stability constant of the complexes were evaluated as log K equal to 5.75; 5.00; 4.89 and 3.89 for complexes with Cu(II), Ni(II), Co(II) and Zn(II) ions, respectively, in 0.1 mol L-1 carbonate buffer solution at pH 10. The interaction between Cu(II) ions and indigo carmine (IC) in alkaline medium resulted in the formation of the Cu2(IC) complex, measured by the spectrophotometric method, with a stoichiometric ratio between indigo carmine and metal ions of 2:1 (metal-ligand). The reported method has also been successfully tested for determination of copper in pharmaceutical compounds based on copper-gluconate without pre-treatment.

scholarly journals Food dyes as an alternative tracking dye for DNA gel electrophoresis

2013 ◽  
Vol 10 (4) ◽  
pp. 1150-1156 ◽  
Author(s):  
Baghdad Science Journal
Keyword(s):  
Uv Light ◽  
Brilliant Blue ◽  
Local Market ◽  
Synthetic Dyes ◽  
Sunset Yellow ◽  
Dna Ladder ◽  
Food Dye ◽  
Brilliant Blue Fcf ◽  
Wide Range ◽  
Food Dyes

The chemical, physical and toxicological effects on health of synthetic dyes that used as tracking dye in the electrophoresis requires seriously search about alternative tracking dye. The present study is aimed to find an alternative dye from safe food dyes which commonly used in food coloring. Five dyes were selected depending on their chemical properties and the availability in local market: Brilliant Blue FCF, Tartrazine, Sunset Yellow FCF, Carmoisine, and green traditional, three dyes were chosen to be mixed as loading buffer: Brilliant Blue FCF, Sunset Yellow FCF as a basic because it give the whole range size of most traditional loading buffers that available in market, and adding the Carmoisine as a new indicator for the bands less than 50bp, then mixed with DNA ladder in same percentage used with traditional loading buffers to clarify the effects of dyes on DNA, migrated on 1% agarose with loading buffer promega, results showed more clarity and highly readable separation of dyes and give wide range of size in the food loading mix than promega loading dye, by viewing the gel on UV light the DNA ladder were moved smoothly, bands separated effeminately on gel and in same rate of the DNA ladder that load with promega loading buffer which indicate no interaction between the food dyes and the DNA.Our studies show that the food dye can be used as a tracking dye in place of used synthetic dye. The procedure is found to be easy, practical, safely and reliable.

scholarly journals Clays for heterogeneous photocatalytic decolorization of wastewaters contaminated with synthetic dyes: a review

2017 ◽  
Vol 12 (2) ◽  
pp. 432-443 ◽  
Author(s):  
Guolin Jing ◽  
Zhengnan Sun ◽  
Ping Ye ◽  
Shirong Wei ◽  
Yu Liang
Keyword(s):  
Advanced Oxidation Processes ◽  
Organic Content ◽  
Synthetic Dyes ◽  
Reaction Conditions ◽  
Environment Friendly ◽  
Moderate Reaction ◽  
Oxidation Processes ◽  
Photocatalytic Decolorization ◽  
High Organic Content ◽  
Photocatalytic Processes

Photocatalysis is one of the most environment-friendly and technologically viable advanced oxidation processes. Compared to conventional thermal, biological, and physicochemical treatments, photocatalytic processes have more moderate reaction conditions and higher efficiency. They are a promising technology for the treatment of dye wastewaters, particularly those that have toxic and high organic content. Matrix-based photocatalysts have been extensively studied to enhance their efficiency. This paper is a review of recently published literature on matrix-based clay photocatalysts – e.g., bentonite, attapulgite, hydrotalcite, etc. – decolorizing dye wastewaters.

scholarly journals The Studying the processing of food dye from beet juice

10.5219/1152 ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 688-694 ◽  
Author(s):  
Tamila Sheiko ◽  
Serhii Tkachenko ◽  
Mikhailo Mushtruk ◽  
Volodymyr Vasyliv ◽  
Olena Deviatko ◽  
...  
Keyword(s):  
Fruits And Vegetables ◽  
Cost Effective ◽  
Human Organism ◽  
Synthetic Dyes ◽  
Food Dye ◽  
Red Beet ◽  
Regular Consumption ◽  
Juice Concentrate ◽  
Natural Carbon ◽  
Pectin Substances

The manuscript describes a new method of red beet processing and the technology of manufacturing food colorant from the juice concentrate, which is natural, safe and useful analogue to existing expensive offers on the market of similar goods that have chemical origin not useful for regular consumption. Nowadays in order to give to food products a colour, close to natural coloring of fruits and vegetables, expensive synthetic dyes are used, which might have cancer-inducing effect when being accumulated by human organism. Therefore improving the technology for producing food grade dye from red beet juice is remarkably important task. Currently, there is a problem for vegetable processors – pectin substances complicate the process, like the illumination of juice and negatively affect its storage capacity. The article below reveals and substantiates the necessity of using a natural carbon-containing adsorbent shungite for the purification of beet juice from pectin substances. On the basis of the study, the authors suggest a more cost-effective way of producing a food dye from juice concentrate, which allows avoiding usage of expensive enzyme processing additives.

scholarly journals Production of levulinic acid from sugarcane bagasse

2016 ◽  
Author(s):  
◽  
Lethiwe Debra Mthembu
Keyword(s):  
Sulphuric Acid ◽  
Sugarcane Bagasse ◽  
Levulinic Acid ◽  
Methanesulfonic Acid ◽  
Hot Water ◽  
North Coast ◽  
Environment Friendly ◽  
The North ◽  
Liquid Hot Water ◽  
Pre Treatment

The main aim of this work was to produce levulinic acid (LA) from sugarcane bagasse (SB) and since there is approximately 3 000 000 tons of bagasse produced per annum by 16 factories that are located on the north coast of Kwa-Zulu Natal, after the extraction of sugar. For this project fructose was firstly used for the production of LA, thereafter SB was used to produce LA. Cellulose was extracted from sugarcane bagasse using two types of pre-treatments namely (i) acid-alkali pre-treatment and (ii) liquid hot water (LHW). In the latter method acid hydrolysis and enzymatic hydrolysis was used to hydrolyse cellulose to glucose. For the acid-alkali pre-treatment work, two types of bagasse was used namely (i) mill-run bagasse and (ii) depithed bagasse and for the LHW a mill-run bagasse (pellets form) was used. In both pre-treatment methods the glucose solution was then acid catalysed by two different acids (i) an environment friendly acid, methanesulfonic acid (MSA) and (ii) sulphuric acid, producing levulinic acid. The results showed that MSA and sulphuric acid produced almost the same yield of LA but, MSA is preferred for the production of LA since it is less toxic and less corrosive than sulphuric acid.

Thermodynamic Analysis of Fischer-Tropsch Fuels from Biomass

2011 ◽  
Vol 71-78 ◽  
pp. 2366-2374
Author(s):  
Bing Jun Liu ◽  
Jin Song Zhou ◽  
Qing Chen
Keyword(s):  
Biomass Energy ◽  
Synthetic Fuels ◽  
Fischer Tropsch ◽  
Minimization Method ◽  
Environment Friendly ◽  
High System ◽  
Gibbs Free Energy Minimization ◽  
Biomass Materials ◽  
Pre Treatment ◽  
Selection Of

As a clean renewable energy, biomass energy is now gradually being used in electric power, chemicals, heating and other related industries with great potential, and further research is also ongoing in depth. At the same time, because the demand of the construction of environment-friendly society, feed gas from biomass gasification for Fischer-Tropsch fuel synthesis in this way also has gained more and more attention. For the selection of ideal way to obtain synthetic fuels with relatively high system efficiency from biomass, this paper simulation for a variety of processes and different gasification conditions based on Gibbs free energy minimization method. The impacts of pre-treatment of biomass, temperature of gasification and pressure are analyzed. In the evaluation of energy efficiency of the system, an exergy analysis of biomass integrated process is presented. All parts of the process were calculated and compared, which mainly includes the gasification, pre-treatment, HRSG, compression, purification, WGS and FT reactor sections. The results showed that in the process the largest exergy losses take place in the gasifier section, and the pre-treatment of biomass materials for this part will have a greater impact on exergy loss.

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