Removal of Reactive Green Dye from Textile Waste Water by Photo Fenton Process: Modeling, Kinetic, and Thermodynamic.

This work investigated the removal of the reactive green (R.G) dye from wastewater using the photo-Fenton process. Batch experiments were carried out to research the role of the Impacts of operating parameters. The dosage of H2O2; dosage Fe+2; pH; temperature, and irradiation time were examined. Maximum decolorization efficiencies green dye were achieved at the [H2O2]=100 ppm; [Fe2+]=20 ppm; pH 3; temperature=56 °C and irradiation time=90 min. This research focuses on modeling, kinetics and thermodynamics of the removal of pollutant (reactive green dye) of water. The results showed that the decolorization kinetic of R.G followed pseudo-first-order reaction kinetic. Also the thermodynamic parameters ∆G˚, ∆H˚ and ∆S˚ were determined using the Van't Hoff equation for the oxidation processes. The changes in Gibbs free energy showed the oxidation process under normal conditions is non-spontaneous.

Green Synthesis of Nickel Nanoparticles using Fruit Peels of Citrus Paradise for Remediation of Congo Red Dye

Biosorption is a cost-effective excellent tool for removing problematic dyes. The present work was focused on the utilization of Citrus paradise (grapefruit) peels aqueous extract for synthesis of nickel nanoparticles. The prepared nanoparticles were characterized by SEM and were used for the remediation of congo red direct dye. The decolorization of Congo Red direct dye was measured using UV/Visible spectrophotometer following the optimization of experimental factors. Maximum decolorization was observed at a dye concentration of 0.02 %, pH 6, at 50 °C temperature, and catalyst dose was 0.01 g/L. TOC and COD values were found to be 79.89 % and 78.23 %. Agriculrural waste could be used for the remediation of other synthetic dyes as well; hence helps in cleaning our natural environment. Resumen. La biosorción es una excelente herramienta rentable para eliminar colorantes problemáticos. El presente trabajo se centró en la utilización del extracto de cáscaras de Citrus paradise (pomelo) para la síntesis de nanopartículas de níquel. Las nanopartículas preparadas se caracterizaron por microscopía electrónica de barrido (MEB) y se utilizaron para la remediación del colorante directo rojo de Congo. La decoloración del colorante directo Rojo Congo se midió mediante espectrometría siguiendo la optimización de factores experimentales. Se observó una decoloración máxima a una concentración de colorante de 0.02 %, pH 6, y una temperatura de 50 °C; la dosis del catalizador fue de 0.01 g/L. Se determinó que los valores de TOC y DQO eran 79.89 % y 78.23 %, respectivamente. Los residuos agrícolas también podrían utilizarse para la remediación de otros tintes sintéticos y con ello ayudar a limpiar nuestro entorno natural.

Screening of Plant Species for Phytoremediation of Synthetic Textile Dye Wastewater

Most of the dyes are carcinogenic and mutagenic in nature. Plants are potential candidates to remediate textile dye wastewater from contaminated sites. The present study aimed to design an efficient hydroponic system to screen potential ornamental plant species for removal of synthetic dye solution of triarylmethane dye Methylene Blue (MB) and diazo dye Congo Red (CR). The six plants selected for screening are Trachyspermum ammi, Tagetes erecta, Hibiscus rosa-sinensis, Chrysanthemum indicum, Bryophyllum fedtschenkoi, and Catharanthus roseus. The phytotreatment of dyes was done up to 40 h for two different concentrations of dyes, i.e., 10 and 20 mg L− 1. Among screened plant species, the maximum decolorization was obtained from T. ammi followed by B. fedtschenkoi. Both plant species showed active growth in indigenous designed hydroponic system even after the phytoremediation process. T. ammi decolorized the MB dye 99% (10 mg L− 1) and 86% (20 mg L− 1) while the decolorization of the CR dye solution was up to 95% (10 mg L− 1) and 84% (20 mg L− 1). T. ammi was found to have maximum potential among screened plants for the removal of MB and CR dye from synthetic dye solution when kept in designed hydroponic system and can be used for phytoremediation of wastewater contaminated with synthetic dyes.

Screening of plant species for phytoremediation of synthetic textile dye wastewater

Most of the dyes are carcinogenic and mutagenic in nature. Plants are potential candidates to remediate textile dye wastewater from contaminated sites. The present study aimed to screen potential plant species for removal of synthetic dye solution of triarylmethane dye Methylene Blue (MB) and diazo dye Congo Red (CR). The six plants selected for screening are Trachyspermum ammi,Tagetes erecta, Hibiscus rosa-sinensis, Chrysanthemum indicum, Bryophyllum fedtschenkoi, and Catharanthus roseus. The phytotreatment of dyes was done up to 40 h for two different concentrations of dyes, i.e., 10 and 20 mg L−1. Among screened plant species, the maximum decolorization was obtained from T. ammi followed by B. fedtschenkoi.Both of these plant species showed active growth even after the phytoremediation process. T. ammi decolorized the MB dye 99% (10 mg L−1) and 86% (20 mg L−1) while the decolorization of the CR dye solution was up to 95%(10 mg L−1) and 84% (20 mg L−1). T. ammiwas found to have maximum potential among screened plants for the removal of MB and CR dye from synthetic dye solution and can be used forphytoremediation of wastewater contaminated with synthetic dyes.

Kinetic Study of Degradation of Basic Turquise Blue X-GB and Basic Blue X-GRRL using Advanced Oxidation Process

This study focuses on application of advanced oxidation (Photo-Fenton) processes to decolorize Basic Turquise Blue (BTB) X-GB 250% and Basic Blue (BB) X-GRRL 250% dyes. The percent decolorization was studied in terms of effect of variation in intensity of UV light at optimum conditions of all the parameters (pH = 3.0, H2O2 = 4.8 mM, FeSO4 = 1.6 mM, temperature = 50 °C, time = 80 min for BTB X-GB, and pH = 5.0, H2O2 = 5.6 mM, FeSO4 = 2.0 mM, temperature = 40 °C, time = 60 min for BB X-GRRL). Maximum decolorization was obtained at maximum intensity (15660 counts/min) of UV light as 96.17% for BTB X-GB and 88.48% for BB X-GRRL. First order, 2nd order and BMG kinetic models were used to analyze the data obtained for intensity of UV light. BMG model gives us the higher values of correlation coefficients for all data of both the dyes. The results have shown that Photo-Fenton oxidation process is the beneficial and effective for oxidation treatment of waste water effluents containing dyes as main pollutants.

Screening of plant species for phytoremediation of synthetic textile dye wastewater

Most of the dyes are carcinogenic and mutagenic in nature. Plants are potential candidates to remediate textile dye wastewater from contaminated sites. The present study aimed to screen potential plant species for removal of synthetic dye solution of triarylmethane dye Methylene Blue (MB) and diazo dye Congo Red (CR). The six plants selected for screening are Trachyspermum ammi (T. ammi), Tagetes erecta (T. erecta), Hibiscus rosa-sinensis (H. rosa- sinensis), Chrysanthemum indicum (C. indicum), Bryophyllum fedtschenkoi (B. fedtschenkoi), and Catharanthus roseus (C. roseus). The phytotreatment of dyes was done up to 40 h for two different concentrations of dyes i.e. 10 and 20 mg L−1. Among screened plant species, the maximum decolorization was obtained from T. ammi followed by B. fedtschenkoi. Both of these plant species showed active growth even after the phytoremediation process. T. ammi decolorized the MB dye 99 (10 mg L−1) and 86% (20 mg L−1) while the decolorization of the CR dye solution was up to 95 (10 mg L−1) and 84% (20 mg L−1). T. ammi found to have maximum potential among screened plants for the removal of MB and CR dye from synthetic dye solution and can be used for phytoremediation of wastewater contaminated with synthetic dyes.

Screening of plant species for phytoremediation of synthetic textile dye wastewater

Most of the dyes are carcinogenic and mutagenic in nature. Plants are potential candidates to remediate textile dye wastewater from contaminated sites. The present study aimed to screen potential plant species for removal of synthetic dye solution of triarylmethane dye Methylene Blue (MB) and diazo dye Congo Red (CR). The six plants selected for screening are Trachyspermum ammi (T. ammi), Tagetes erecta (T. erecta), Hibiscus rosa-sinensis (H. rosa- sinensis), Chrysanthemum indicum (C. indicum), Bryophyllum fedtschenkoi (B. fedtschenkoi), and Catharanthus roseus (C. roseus). The phytotreatment of dyes was done up to 40 h for two different concentrations of dyes i.e. 10 and 20 mg L−1. Among screened plant species, the maximum decolorization was obtained from T. ammi followed by B. fedtschenkoi. Both of these plant species showed active growth even after the phytoremediation process. T. ammi decolorized the MB dye 99 (10 mg L−1) and 86% (20 mg L−1) while the decolorization of the CR dye solution was up to 95 (10 mg L−1) and 84% (20 mg L−1). T. ammi found to have maximum potential among screened plants for the removal of MB and CR dye from synthetic dye solution and can be used for phytoremediation of wastewater contaminated with synthetic dyes.

Screening of plant species for phytoremediation of synthetic textile dye wastewater

Most of the dyes are carcinogenic and mutagenic in nature. Plants are potential candidates to remediate textile dye wastewater from contaminated sites. The present study aimed to screen potential plant species for removal of synthetic dye solution of triarylmethane dye Methylene Blue (MB) and diazo dye Congo Red (CR). The six plants selected for screening are Trachyspermum ammi (T. ammi), Tagetes erecta (T. erecta), Hibiscus rosa-sinensis (H. rosa- sinensis), Chrysanthemum indicum (C. indicum), Bryophyllum fedtschenkoi (B. fedtschenkoi), and Catharanthus roseus (C. roseus). The phytotreatment of dyes was done up to 40 h for two different concentrations of dyes i.e. 10 and 20 mg L−1. Among screened plant species, the maximum decolorization was obtained from T. ammi followed by B. fedtschenkoi. Both of these plant species showed active growth even after the phytoremediation process. T. ammi decolorized the MB dye 99% (10 mg L−1) and 86% (20 mg L−1) while the decolorization of the CR dye solution was up to 95% (10 mg L−1) and 84% (20 mg L−1). T. ammi found to have maximum potential among screened plants for the removal of MB and CR dye from synthetic dye solution and can be used for phytoremediation of wastewater contaminated with synthetic dyes.

Optimized Sorption of Methyl Orange using Functionalized Carob Plant Pod

One of the most problematic groups of water pollutants is dye, a main constituent of textile industrial wastewater, which is carcinogenic. Therefore, this research delved into adsorption of dyes from textiles and wastewater using acid-treated as an adsorbent. The adsorbent was prepared by functionalizing the pod of carob with concentrated H3PO4. The effects of operational parameters such as adsorbent dosage, contact time, initial concentration of dye and temperature were studied and optimized using central composite design of design of experiment (DOE). The effects of process parameters (contact time, concentration, adsorbent dosage and temperature) on the dye adsorption were determined and optimized. It was observed that the colour removal efficiency increased with an increase in adsorbent mass and contact time. The adsorption process is endothermic as the percentage removal increases with temperature. The optimum contact time, concentration, adsorbent dosage and temperature were found to be 60oC, 9.74hr, 10ppm, and 5g respectively for the maximum decolorization.