Academic literature on the topic 'Dyes and dyeing Waste disposal'
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Journal articles on the topic "Dyes and dyeing Waste disposal"
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Al-Etaibi, Alya M., and Morsy Ahmed El-Apasery. "Ultrasonic Dyeing of Polyester Fabric with Azo Disperse Dyes Clubbed with Pyridonones and Its UV Protection Performance." Chemistry 3, no. 3 (August 24, 2021): 889–95. http://dx.doi.org/10.3390/chemistry3030065.
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The textile sector is closely linked to environmental pollution as a result of the use of toxic chemicals and their disposal in liquid waste, which negatively affects for the environment. Moreover, textile industries, especially wet processing, consume a large amount of energy, water, and chemical auxiliaries. Therefore, there is an urgent need to find a solution that takes the problem of environmental pollution into account. Considering ultrasound as an environmentally safe alternative for dyeing polyester fabrics with the disperse dyes that we have prepared before, the comparison between the ultrasonic dyeing method and conventional dyeing at low temperatures was investigated. Dye exhaustion on polyester fabrics and fastness properties such as the washing, rubbing, light, and perspiration of all of the dyed fabrics were performed by two dyeing methods. Additionally, the ultraviolet protection factors (UPF) for dyed polyester fabrics were evaluated.
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Zhang, Qingshuo, Liuming Wei, Yutong Yang, Chan Luo, Zhu Zhu, Zhigao Liu, Yunlin Fu, and Jing Sun. "Dyeing process and mechanism of eucalyptus veneer with Pterocarpus macrocarpus Kurz heartwood pigment as natural dye." BioResources 15, no. 4 (October 12, 2020): 8925–43. http://dx.doi.org/10.15376/biores.15.4.8925-8943.
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To make full use of the processing residues of Pterocarpus macrocarpus Kurz and reduce the environmental pollution caused by synthetic dyes, natural dye was extracted from Dalbergia bariensis Pierre heartwood. The purpose of the work was to prepare natural dyes of Pterocarpus macrocarpus and identify the key color-producing components to better explore the mechanisms of combination between dyes and eucalyptus veneers. The main components of Pterocarpus macrocarpus heartwood were analyzed by ultra-high performance liquid chromatography with quadrupole-electrostatic field Orbitrap high resolution-mass spectrometry (UPLC-Q-EXACTIVE Orbitrap-MS). The best dyeing process and color fastness were measured. Research technology combining Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM) was used to explore the binding mechanism between eucalyptus veneers and dyestuffs. The UPLC-Q-EXACTIVE Orbitrap-MS results showed 16 flavonoids. The optimal dyeing process parameters of eucalyptus veneer were a 90 °C dyeing temperature, 12 h dyeing time, 4 wt% pigment, and 2 wt% NaCl. The FTIR and FESM results revealed that the dyeing was mainly achieved by physical adsorption and intermolecular hydrogen bonding.
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Howard, Ebenezer Kofi, Charles Frimpong, and Raphael Kanyire Seidu. "Risk assessment of attitudes and practices of students and practitioners toward studio dyeing in Ghana." Research Journal of Textile and Apparel 23, no. 3 (September 9, 2019): 189–200. http://dx.doi.org/10.1108/rjta-03-2019-0011.
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Purpose The purpose of this study is to assess the attitudes and practices of students and practitioners in the dyeing studio. Empirical evidence shows that synthetic dyes are the most commonly used dyestuff because of their colour fastness as compared with natural dyes. However, it is proven scientifically that synthetic dyes and their auxiliaries are carcinogenic and allergenic, which pose as health risks to users. Design/methodology/approach The study used analytical observational study design, where observation, questionnaire and interview were the instruments for data collection. Findings A survey conducted at selected dyeing studios in Ghana revealed the excessive use of vat dyes by students and practitioners because of its availability and accessibility on the local market. Adversely, the study found non-use of personal protective equipment by students and practitioners for protection against hazardous effects of dye chemicals. Again, poor studio set up with limited space and lack of proper waste drainage systems at the various dyeing studios results in inappropriate disposal of dyes, leading to environmental pollution. Originality/value Dyeing throughout history has been practiced to colour a fabric or yarn for specific use in the environment, which brings in some revenue. This practice however employs the use of dyes coupled with its auxiliaries, which poses some health problems in the short, medium and long term because of certain attitudes and practices exhibited by students and practitioners in the studio. It is therefore imperative for effective compliance to safety rules and practices by students and practitioners to ensure their safety. It is also critical that educational institutions and practitioners build modern dyeing studios which are spacious, well ventilated and efficient in limiting environmental pollution in compliance with eco-friendly practices. The study further recommends collaboration between Academia, local dyers’ association , Ghana Health Service and the Environmental Protection Agency to organize workshops to ensure best safety practices to save lives and the environment.
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Saxena, Ambika, and Sarika Gupta. "Bioefficacies of microbes for mitigation of Azo dyes in textile industry effluent: A review." BioResources 15, no. 4 (September 21, 2020): 9858–81. http://dx.doi.org/10.15376/biores.15.4.saxena.
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In recent years, India has emerged as a promising industrial hub. It has a cluster of textile, dyeing, and printing industries. The adjoining rivers/water bodies receive mostly untreated discharge from these industries. Textile industrial effluent contains various contaminants (dyes, heavy metals, toxicants, and other organic/inorganic dissolved solids) that alter the physico-chemical properties of adjoining land and waterbodies in which it is discharged, thereby degrading the water quality and subsequently affecting the landscapes in the vicinity. This ultimately affects the flora and fauna of the locale and has adverse effects on human health. Out of the total dyes (approximately 10,000 dyes) exploited in the textile dyeing and printing units, azo dyes possess a complex structure and are synthetic in origin. They contribute nearly 70% to the total effluent discharge. Biological processes are based on the ability of inhabiting indigenous microorganisms in these contaminated environments to tolerate, resist, decolorize/degrade, and mitigate the recalcitrant compounds. Exploring microbes with higher efficacy of azo dye degradation can reduce the amount of chemical discharged from the process. The present review explores the potential of microbial diversity for the development of an effective bioremediation approach. The review also includes the impact of azo dyes on the flora and fauna, as well as conventional and microbe-assisted nanoparticle technology for treatment of the textile wastewater targeting the degradation of dye contaminants.
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Hu, Yu'an, Sheng He, Mei He, Kate Semple, Meiling Chen, and Chunping Dai. "Weathering performance of dyed bamboo fiber composites." BioResources 15, no. 4 (October 28, 2020): 9523–38. http://dx.doi.org/10.15376/biores.15.4.9523-9538.
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Flattened and crushed fiber-bundles of moso bamboo (Phyllostachys pubescens) were dyed with a water or alcohol-based dye at 20 °C, 75 °C or 90 °C for 72 h, followed by drying and coating with PF resin. Hot-pressed bamboo fiber composites (BFC) were manufactured, and the weathering performance of the composites made from dyed and natural bamboo material were tested over 90 days of the Autumn/Winter season in Beijing. Dye was able to penetrate the bamboo tissue to create a rich red color that degraded in color faster than BFC made from un-dyed bamboo. BFC made from un-dyed tissue remained a lighter but more consistent color over the weathering period. Dying the bamboo in ethanol-based dye was effective at pigmenting the product, but made it more susceptible to color degradation as well as greater mass and thickness loss due to the chemical degradation of the lignin caused by ethanol. Higher temperature of water dying treatment (90 °C) gave the greatest resistance to mass and thickness loss during outdoor exposure, and the bamboo may have benefitted from the longer period of ‘heat treatment’ during dyeing. Further work is needed to quantify dye leaching from bamboo tissue and to develop more water-tight and color-fast, weather resistant dyes for bamboo products.
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CHATTOPADHYAY, S., N. PAN, and A. DAY. "Reuse of reactive dyes for dyeing of jute fabric." Bioresource Technology 97, no. 1 (January 2006): 77–83. http://dx.doi.org/10.1016/j.biortech.2005.02.033.
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Savarino, Piero, Guido Viscardi, Rosarina Carpignano, and Ermanno Barni. "Model dyes for optimizing the dyeing of polyamide." Journal of Chemical Technology & Biotechnology 51, no. 2 (April 24, 2007): 243–51. http://dx.doi.org/10.1002/jctb.280510210.
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Hakim, Luqman Nur, Syarifudin A., and Sulaiman Hamzani. "Efektifitas Abu Sekam Padi Dan Poly Aluminium Chloride Dalam Menurunkan Zat Warna Limbah Cair Industri Sasirangan." JURNAL KESEHATAN LINGKUNGAN: Jurnal dan Aplikasi Teknik Kesehatan Lingkungan 13, no. 2 (July 1, 2016): 346. http://dx.doi.org/10.31964/jkl.v13i2.32.
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Abstract: Effectiveness Of Rice Husk Ash And Poly Aluminum Chloride In Reducing Exposure Colour Liquid Waste Industry Sasirangan. Sasirangan fabric industry is the textile of industry in Kalimantan Selatan produce wastewater of dyeing cloth sasirangan process that uses water as a primary adjuvant in stage process.The study aims to determine the effectiveness of rice husk ash and Poly Aluminium Chloridereduce levels of dyes in wastewater sasirangan "Oriens Handycraft". This study tested a laboratory scale with dose variation of rice husk ash and Poly Aluminium Chloride for reduced levels of dyes in wastewater sasirangan. The study design is a randomized pretest - posttest control group design. The population of the waste liquid fabric manufacturesasirangan results and samples are the waste from the manufacture of cloth sasirangan which represents the population. This study conduct statistical tests usingKruskal Wallis and Mann-Whitney Test.Theresultsofthestudyof color levels priorto treatment equal to 2,712 PtCo and after treatment ranges from 676.3 to 978.7 PtCo at a dose of 58 grams of rice husk ash; 59 g; 60 g; 61 g; 62 gr and Poly Aluminium Chloride 0.5 gr. For a dose of 58 grams of rice husk ash; 59 g; 60 g; 61 g; 62 gr and Poly Aluminium Chloride 1 g of color levels before treatment and after PtCo 1775 amounted to 227.7 PtCo ranges up to 240 PtCo. Rice husk ash and Poly Aluminium Chloride effective at pH 6.5 - 7. Results of normality test showed abnormal data. Kruskal Wallis test probability value 0.002 <0.05, there is a difference between the average dosing in the control group and the treatment group and the Mann-Whitney Test probability value of 0.009 (0.018 <0.05), the rice husk ash dosing and Poly Aluminium Chloride 1 g more effective than rice husk ash dosing and Poly Aluminium Chloride 0.5 g.Efforts government can do is provide the appropriate policy on effluent quality standards and attention to industrial waste disposal sasirangan. For the industry can manage its waste before waste into the environment. Keywords: SasiranganWaste; Materials coagulant; pH; Dyes
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Shi, Yuan, Wenhua Lyu, Xueyu Wang, and Qiangqiang Liu. "Effect of various compounding methods on acid red 18050- melamine modified urea formaldehyde resin compound as wood modifier." BioResources 14, no. 4 (September 30, 2019): 9100–9109. http://dx.doi.org/10.15376/biores.14.4.9100-9109.
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In order to simultaneously improve the strength and decoration properties of plantation wood, a multi-effect modifier was prepared by compounding acid red 18050(G) with melamine-modified urea formaldehyde resin (MUF). Various compounding methods for MUF synthesis such as adding dye with the first part urea (U1G) or with the second part urea (U2G), or direct blending with MUF resin (BG) were tested. Chinese fir plantation wood was impregnated with these modifiers separately, and its color, color fastness, and dyeing mechanism were studied. The results showed that G had good compatibility with MUF and could prolong its storage time, and all compound modifiers exhibited permeability and coloring effect on Chinese fir wood. Compared with G-dyed wood under the same conditions, all the compound dyed wood had better color fastness to water, and the U2G-dyed was the best, the color fastness to xenon light of U2G dyed wood was greatly improved.. Fourier transform infra-red (FTIR) analysis showed that compared with MUF-modified wood, the dye affected MUF hydroxyl-methylation reaction in U1G, lowered the polycondensation degree, and extended its storage time. The dye might have promoted the ionic reaction between resin amino and dye sulfonic groups in U2G, thus displaying better color fastness.
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Mu, Bingnan, Linyun Liu, Wei Li, and Yiqi Yang. "High sorption of reactive dyes onto cotton controlled by chemical potential gradient for reduction of dyeing effluents." Journal of Environmental Management 239 (June 2019): 271–78. http://dx.doi.org/10.1016/j.jenvman.2019.03.062.
Full textDissertations / Theses on the topic "Dyes and dyeing Waste disposal"
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Powell, William W. "The removal of color and DOC from segregated dye waste streams using ozone and Fenton's reagent followed by biotreatment." Thesis, Virginia Polytechnic Institute and State University, 1992. http://hdl.handle.net/10919/50105.
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The decolorization of reactive dye-containing waste streams using oxidizing chemicals and the determination of the effect of the oxidizing agents on the subsequent biotreatment of the streams was investigated. Three oxidizing schemes were chosen for study: molecular ozone, base-promoted ozonation, and Fenton’s reagent (Fe²⁺ and H₂O₂). The ADMI color value of the solutions was used as the primary parameter for color comparison and dissolved organic carbon (DOC) removal was the measure of the effect of biodegradation.
Three different waste streams from a textile dyeing facility were chosen: a Navy slack washer effluent from a pad-dyeing operation, a Navy dyebath effluent from a dyejet, and a Brilliant Blue dyejet effluent. Pure dye solutions were oxidized as well to determine the effect of interfering species in the waste streams.
The results demonstrated that base-promoted ozonation was more effective than molecular ozone for the decolorization of the Navy slack washer effluent. In both cases the ADMI color value could be decreased by 82% but almost half as much ozone was necessary for the high pH trials. The high pH ozonation proved more effective for the Navy jet-dye effluent, as well, achieving a much lower color value with less ozone. Greater decolorization (96%) of the Navy jet-dye effluent was achieved by Fenton’s reagent than for either of the ozonation schemes. Ozonation of the Brilliant Blue jet-dye bath showed no dependence on pH and the color value of the solution was reduced could be 63%.
The results indicate that the dyes were selectively oxidized by ozonation and the amount of ozone required for decolorization depended mainly the initial color of the dye waste stream. The amount of hydrogen peroxide required for Fenton’s reagent oxidation depended on the initial DOC of the dye waste stream.
Oxidation of the wastewater streams proved to neither enhance nor hinder the operation of the biological reactors. The color removals by biological activity were minimal for both control and experimental reactors. Dissolved carbon removal was not enhanced by oxidative pretreatment.Master of Science
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Mutambanengwe, Cecil Clifford Zvandada. "Hydrogenases from sulphate reducing bacteria and their role in the bioremediation of textile effluent." Thesis, Rhodes University, 2007. http://hdl.handle.net/10962/d1004019.
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The continuing industrial development has led to a corresponding increase in the amount of waste water generation leading to a consequential decline in levels and quality of the natural water in the ecosystem. Textile industries consume over 7 x 10[superscript 5] tons of dyes annually and use up to 1 litre of water per kg of dye processed and are third largest polluters in the world, the problem being aggravated by the inefficiencies of the dye houses. An abundance of physio-chemical methods are in use world wide, however, there is increasing concern as to their impact in effectively treating textile effluents as they introduce secondary pollutants during the ‘remediation’ process which are quite costly to run, maintain and clean up. Research on biological treatment has offered simple and cost effective ways of bioremediating textile effluents. While aerobic treatment of textile dyes and their effluents has been reported, its major draw back is commercial up-scaling and as such anaerobic systems have been investigated and shown to degrade azo dyes, which form the bulk of the dyes used world wide. However, the mechanisms involved in the bioremediation of these dyes are poorly understood. The aims of this study were to identify and investigate the role of enzymes produced by sulphate reducing bacteria (SRB) in bioremediating textile dye and their effluents. Sulphate reducing bacteria were used in this study because they are tolerant to harsh environmental conditions and inhibit the proliferance of pathogenic micro-organisms. The appearance of clear zones in agar plates containing azo dye concentrations ranging from 10 – 100 mgl[superscript -1] showed the ability of SRB to decolourize dyes under anaerobic conditions. Assays of enzymes previously reported to decolourise azo dyes were not successful, but led to the identification of hydrogenase enzyme being produced by SRB. The enzyme was found to be localised in the membrane and cytoplasm. A surface response method was used to optimize the extraction of the enzyme from the bacterial cells resulting in approximately 3 fold increase in hydrogenase activity. Maximum hydrogenase activity was found to occur after six days in the absence of dyes but was found to occur after one day in the presence of azo dyes. A decline in hydrogenase activity thereafter, suggested inhibition of enzymatic activity by the putative aromatic amines produced after azo cleavage. Purification of the hydrogenase by freeze drying, poly ethylene glycol, and Sephacryl – 200 size exclusion- ion exchange chromatography revealed the enzyme to have a molecular weight of 38.5 kDa when analyzed by a 12 % SDS-PAGE. Characterisation of the enzyme revealed optimal activity at a pH of 7.5 and temperature of 40 °C while it exhibited a poor thermal stability with a half-life of 32 minutes. The kinetic parameters V[subscript max] and K[subscript m] were 21.18 U ml[superscript -1} and 4.57 mM respectively. Application of the cell free extract on commercial dyes was not successful, and only whole SRB cells resulted in decolourisation of the dyes. Consequently trials on the industrial dyes and effluents were carried out with whole cells. Decolourisation rates of up to 96 % were achieved for the commercial dyes and up to 93 % for the industrial dyes over a period of 10 days.
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Sotiles, Anne Raquel. "Estudo de diferentes tratamentos da caulinita para possível aplicação como adsorvente do corante têxtil C.I. Reactive Blue 203." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2289.
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CAPES; Fundação AraucáriaA caulinita é um argilomineral empregado em diversos setores industriais e, em decorrência da elevada disponibilidades na crosta terrestre são realizadas modificações químicas para a obtenção de diferentes estruturas do material buscando ampliar sua utilização. Foram realizadas ativações com ácidos fosfórico e sulfúrico nas concentrações de 5 e 10 mol L-1, e tratamentos térmicos em 850, 1100 e 1200 ºC visando a aplicação deste argilomineral na adsorção do corante têxtil Reactive Blue 203. As amostras foram caracterizadas por Difratometria de Raios X (DRX), Espectroscopia na Região do Infravermelho com Transformada de Fourier (FTIR), Análise Termogravimétrica (TGA), Análise Térmica Diferencial (DTA) e Microscopia Eletrônica de Varredura (MEV). Nos espectros de FTIR das amostras calcinadas houve o desaparecimento das absorções características da hidroxila, além do surgimento de vibrações atribuídas a metacaulinita, que é formada a partir da calcinação da caulinita. Pelo DRX foi possível confirmar as alterações da estrutura, pois o difratograma apresentou característica de material amorfo quando calcinado em 850 °C, enquanto que nas temperaturas de 1100 e 1200 °C o material voltou a apresentar estrutura cristalina, devido a formação da mulita. Essas modificações também são evidentes na análise térmica, sendo que o evento ocorrido na curva termogravimétrica entre 420 ºC e 700 ºC refere-se à desidroxilação do material e consequentemente, à formação da metacaulinita. Já a análise térmica diferencial apresentou um pico exotérmico na região de 1000 ºC, correspondendo à conversão da metacaulinita em mulita. Entretanto, a análise de MEV não demonstrou mudanças na morfologia do material. O ponto de carga zero obtido para a caulinita foi de 4,41, correspondendo ao valor de pH em que a carga superficial é zero, sendo que em valores de pH superiores a este a caulinita estará mais propícia a adsorver substâncias catiônicas e em valores de pH inferiores, aniônicas. A caulinita apresentou maior quantidade de sítios ácidos, uma vez que ambas as análises resultaram em valores de pH inferiores a 7, característicos de argilominerais com estrutura lamelar, devido a presença das hidroxilas internas e do alumínio, uma vez que trata-se de um aluminossilicato. No teste de adsorção com o corante têxtil Reactive Blue 203 a caulinita sem tratamento se sobressaiu perante as demais amostras, com melhor ajuste da isoterma de Sips e cinética de pseudo-segunda ordem. Os parâmetros termodinâmicos indicam que se trata de um processo espontâneo e endotérmico e evidenciam que ocorre uma adsorção química.
The kaolinite is a clay mineral used in several industrial sectors and, due to the high availability in the earth's crust, chemical modifications are made to obtain different structures of the material in order to expand its use. Activations were carried out with phosphoric and sulfuric acids at concentrations of 5 and 10 mol L-1, and thermal treatments at 850, 1100 and 1200ºC for the application of this clay in the adsorption of Reactive Blue 203 textile dye. The samples were characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), Differential Thermal Analysis (DTA) and Scanning Electron Microscopy (SEM). In the FTIR spectra of the calcined samples, the characteristic hydroxyl absorptions disappeared, as well as the appearance of vibrations attributed to metacaulinite, which is formed from calcination of kaolinite. By XRD, it was possible to confirm the changes in the structure, since the diffractogram showed a characteristic of amorphous material when calcined at 850 °C, while in the temperatures of 1100 and 1200 °C the material returned to present crystalline structure, due to the formation of the mullite. These changes are also evident in the thermal analysis, and the event occurring in the thermogravimetric curve between 420 ºC and 700 ºC refers to the dehydroxylation of the material and, consequently, to the formation of metakaolin. The differential thermal analysis showed an exothermic peak in the region of 1000 ºC, corresponding to the conversion of metacaulinite to mullite. However, SEM analysis did not show changes in material morphology. The zero charge point obtained for kaolinite was 4.41, corresponding to the pH value at which the surface charge is zero, and at pH values higher than that kaolinite will be more propitious to adsorb cationic substances and in values of pH lower, anionic. The kaolinite presented higher amount of acidic sites, since both analyzes resulted in pH values lower than 7, characteristic of clay minerals with lamellar structure, due to the presence of internal hydroxyls and aluminum, since it is an aluminosilicate. In the adsorption test with the Reactive Blue 203 textile dye, the untreated kaolinite stood out in the other samples, with better adjustment of the Sips isotherm and pseudo second order kinetics. The thermodynamic parameters indicate that it is a spontaneous and endothermic process and evidence that a chemical adsorption occurs.
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Yaser, Abu Zahrim. "Development of integrated nanofiltration system for highly concentrated dye removal." Thesis, Swansea University, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678536.
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McCurdy, Michael W. "Chemical reduction and oxidation combined with biodegradation for the treatment of a textile dye wastewater." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-10102009-020050/.
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Loyd, Chapman Kemper. "Anaerobic/aerobic degradation of a textile dye wastewater." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-08042009-040351/.
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Méndez-Sánchez, Noemi C. Lange Clifford R. "Biodecolorization of paper mills wastewater using anaerobic composting." Auburn, Ala, 2009. http://hdl.handle.net/10415/1862.
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Marin, Sandra Liliana Albornoz. "Remoção dos corantes têxteis C.I. Reactive Blue 203 e C.I. Reactive Red 195 mediante o uso de bagaço de maçã como adsorvente." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1498.
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CNPqA indústria têxtil tem grande impacto ambiental devido ao seu amplo consumo de água e da utilização de diferentes produtos químicos orgânicos como os corantes. Existem diferentes métodos utilizados no tratamento de efluentes têxteis, sendo um deles, a adsorção. A utilização de resíduos agroindustriais como adsorventes é uma alternativa para a descontaminação de efluentes com corantes. Desta forma, este trabalho teve por objetivo avaliar o resíduo agroindustrial de Bagaço de Maçã da variedade Fuji, proveniente da produção de sucos, como adsorvente alternativo na remoção de corantes têxteis C.I. Reactive Blue 203 e C.I. Reactive Red 195 em meio aquoso sintético. As características do adsorvente mostraram que o bagaço de maçã apresenta 89,36% de umidade, 35,64% de fibra bruta e a 52,72% de carbono. O pH(pcz) é de 3,5 e em sua superfície predomina sítios ácidos. Na espectroscopia do infravermelho observou-se a presença dos principais grupos funcionais (–OH), (–NH), (CH2), (–CO), (–C–O–), na microscopia eletrônica de varredura a morfologia da superfície do bagaço de maçã mostrou-se porosa e a determinação das características texturais indicaram uma área superficial de 2,088 (m2.g-1) para o tamanho de partícula de 0,125 mm. A partir dos resultados do planejamento experimental - 23, pode-se otimizar o processo de adsorção para os dois corantes pelo bagaço de maçã fixando as variáveis independentes com influência significativa (pH de 2,0 e granulometria do adsorvente em 0,125 mm). No estudo cinético o tempo de equilíbrio para o Reactive Blue 203 foi de 420 minutos e para Reactive Red 195 de 180 minutos e o ajuste matemático para ambos corantes foi para o modelo de pseudo-segunda ordem. As isotermas de equilíbrio foram testadas pelos modelos das isotermas de adsorção de Langmuir, Freundlich, Dubinin-Raduskevich e BET, sendo este último mais adequado para a descrição do processo. Os parâmetros termodinâmicos foram determinados em diferentes faixas de temperatura, em que valores negativos de ΔG° indicam a espontaneidade do processo de adsorção para os dois corantes e valores negativos para ΔH° no processo de adsorção do corante Reactive Blue 203 indicam natureza exotérmica no entanto para adsorção do corante Reactive Red 195 valores positivos de ΔH° sugerem a sua natureza endotérmica. Os valores de ΔH e Ea para a adsorção dos dois corantes em bagaço de maçã mostram que são da mesma ordem de grandeza que o calor e a energia de ativação da quimissorção. O bagaço de maçã mostrou-se altamente favorável para o processo de adsorção dos corantes Reactive Blue 203 e Reactive Red 195.
The textile industry has a big environmental impact because consume a lot of water, and use different chemical organic products like dyes. There are different methods for treatment of textile effluents one of those is adsorption. Using agroindustrial residues like adsorbents is an alternative for decontamination effluents by dyes. Therefore, this present work aimed to evaluate agroindustrial residue apple pomace of Fuji variety, that proceed of production of juices, like alternative adsorbent for the removal textile dyes C.I. Reactive Blue 203 and C.I. Reactive Red 195 in aqueous synthetic medium. The adsorbent characteristics showed that apple pomace present 89.36% of humidity and 35,64% of crude fiber. and 52,72% of C. The pH (pzc) is 3,5, and its surface prevails sites acids. In infrared spectroscopy it was observed the presence of the major functional groups (–OH), (–NH), (CH2), (–CO), (–C–O–). In scanning electron microscopy of the surface morphology of the apple pomace was found to be porous and determining the textural features indicated a surface area of 2,088 (m2.g-1) to 0,125 mm particle size. From the results of the experimental design 23 can optimize the process of adsorption of for both dyes by apple pomace, setting the independent variables with significant influence (pH of 2.0 and particle size of the adsorbent 0.125 mm). In the kinetic study the equilibrium time for Reactive Blue 203 was 420 minutes and for Reactive Red 195 was 180 minutes and for both dyes mathematical adjustment was to model the pseudo-second order. The equilibrium isotherms were tested by the models adsorption isotherms of Langmuir, Freundlich, Dubinin-Raduskevich and BET, the last being more suitable for the description of the process. The thermodynamic parameters were determined at different ranges of temperature, in which negative values of ΔG° means the spontaneity in the adsorption process for both dyes and negative values for ΔH° for adsorption process of Reactive Blue 203 suggest the exothermic nature However the adsorption to the dye Reactive Red 195 ΔH° positive values suggest its endothermic nature. The values for ΔH° and the Ea for the adsorption of the two dyes in apple pomace show that they are of the same order of magnitude as the heat and the activation energy of chemisorption. The apple pomace was highly favorable for the adsorption of the dye Reactive Blue 203 and Reactive Red 195.
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Mmelesi, Olga Kelebogile. "Synthesis and characterization of pine cone carbon supported iron oxide catalyst for dye and phenol degradation." Thesis, Vaal University of Technology, 2017. http://hdl.handle.net/10352/418.
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M. Tech. (Department of Chemical Engineering, Faculty of Engineering and Technology), Vaal University of TechnologyFenton oxidation is classified into two processes, homogeneous and heterogeneous. Homogeneous Fenton oxidation process, have been shown to be efficient in the degradation of organic pollutants. However, it was shown to have limitations which can be addressed by the heterogeneous Fenton oxidation. Despite the high efficiency of the heterogeneous Fenton oxidation process in the degradation of recalcitrant organic pollutants, the currents synthesis trends of the heterogeneous Fenton catalyst have been proven to be time and energy constraining, since it involves the multi-step were the activated carbon have to be prepared first then co-precipitate the iron oxide on the activated carbon. However, as much as the heterogeneous Fenton catalyst has been proven to have high catalytic activity towards degradation of organic pollutants, these catalysts have some limitations, such limitations include metal ions being leached from the catalyst support into the treated water causing catalyst deactivation and a secondary pollution to the treated water. In this thesis, these catalysts have been applied in the degradation of recalcitrant organic pollutants such as methylene blue and phenols. This study focuses on the single step synthesis of iron oxide nanoparticles supported on activated carbon, were carbonaceous material is impregnated with iron salt then pyrolysed via microwave heating. Microwave power and the amount of iron salt were optimized. The prepared activated carbon-iron oxide composites were applied to the degradation of 2-nitrophenol (2-NP) and methylene blue (MB). Methylene blue was used as a model compound due to the fact that it is easier to monitor the degradation process with UV-Vis as compared to 2-nitrophenol . 2-nitrophenol the additional step for the adjustment of pH is required since nitrophenols are colorless in color at lower pH. The characterization showed that the microwave power and the amount of the iron precursor have an influence on the porosity and surface functional groups of the activated carbon. Further it was vi observed that microwave power and iron precursor influnces the amount of iron oxide formed on the surface of the support. It was also observed that the activated carbon-iron oxide composite have the catalytic effects on the Fenton oxidation process of MB and 2-NP. The parameters such as H2O2, pH, catalyst dose, initial concentration, temperature affect the degradation of both MB and 2-NP. Kinetics studies showed that Fenton is a surface driven reaction since the results fitted the pseudo first order model. The thermodynamics parameters also showed that the reaction is endothermic, spontaneous and is randomized. This implies that the reaction of the degradation of MB and 2-NP is feasible and the catalysts prepared have high catalytic activity. MB and 2-NP were degraded to smaller organic molecules (carboxylic acids). The stability of the catalyst observed to decrease as the number of cycles increased, this is due to the leaching of iron ions from the support material. Hence it was concluded that the activated carbon-iron oxide composite was successfully synthesized and had the high catalytic activity for the degradation of MB and 2-NP.
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Mutambanengwe, Cecil Clifford Zvandada. "Hydrogenases from sulphate reducing bacteria and their role in the bioremediation of textile effluent /." 2006. http://eprints.ru.ac.za/869/.
Full textBooks on the topic "Dyes and dyeing Waste disposal"
1
Sharma, Sanjay K. Green chemistry for dyes removal from wastewater: Research trends and applications. Hoboken, New Jersey: Scrivener Publishing/Wiley, 2015.
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Fang zhi ran zheng fei shui chu li ji shu ji gong cheng shi li: Fangzhi ranzheng feishui chuli jishu ji gongcheng shili. Beijing Shi: Hua xue gong ye chu ban she, 2008.
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3
El-Nemr, Ahmed. Non-conventional textile waste water treatment. Hauppauge, N.Y: Nova Science Publishers, 2011.
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service), SpringerLink (Online, ed. Adsorption of Reactive Red 158 Dye by Chemically Treated Cocos Nucifera L. Shell Powder: Adsorption of Reactive Red 158 by Cocos Nucifera L. Dordrecht: The Author(s), 2011.
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Saqa, Hanna. Waste reduction activities and options for a manufacturer of commercial dry cleaning equipment. Cincinnati, OH: U.S. Environmental Protection Agency, Risk Reduction Engineering Laboratory, 1992.
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Sharma, Sanjay K. Green Chemistry for Dyes Removal from Waste Water: Research Trends and Applications. Wiley & Sons, Incorporated, John, 2015.
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Sharma, Sanjay K. Green Chemistry for Dyes Removal from Waste Water: Research Trends and Applications. Wiley & Sons, Incorporated, John, 2015.
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Govindwar, Sanjay P., and Anuradha N. Kagalkar. Phytoremediation Technologies for the Removal of Textile Dyes: An Overview and Future Prospect. Nova Science Pub Inc, 2010.
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Mudhoo, Ackmez, and Dickcha Beekaroo. Adsorption of Reactive Red 158 Dye by Chemically Treated Cocos Nucifera L. Shell Powder: Adsorption of Reactive Red 158 by Cocos Nucifera L. Springer, 2011.
Find full textBook chapters on the topic "Dyes and dyeing Waste disposal"
1
Singh, Rajender, and Mamta Chauhan. "Effective Management of Agro-Industrial Residues as Composting in Mushroom Industry and Utilization of Spent Mushroom Substrate for Bioremediation." In Waste Management, 1217–36. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1210-4.ch055.
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Different types of edible mushrooms like Agaricus, bisporus, A. bitoriqus, Pleurotus spp., Volvariella volvacea, Lentinula edodes, Calocybe indica, Flamullina, Ganoderma lucidum etc. are cultivated in industrial scale. Majority of edible fungi secretes extracellular Ligninocellulolytic enzymes like Laccase, lignin peroxidase, manganese peroxidase, cellulase etc. for effective conversion of ligninocellulolytic substrate to compositing form which led to fruiting of mushrooms. Consequently, an adequate disposal method is needed for the high quantities of spent mushroom substrate (SMS) generated in this agro-food industrial activity. On the other side, textile industry among the largest water consuming industries in the world and approximately, 10,000 different dyes and pigments are used at industrial scale. It is estimated that nearly 40% of the total dyes used in the dyeing process may find their way in wastewater. So, there is an attempt to utilize the ligninolytic enzymes rich SMS of different mushroom for efficiently biodegradation of textile wastewater & polyaromatic pollutants.
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Srivastava, Ruchi, and Irfan Rashid Sofi. "Impact of Synthetic Dyes on Human Health and Environment." In Impact of Textile Dyes on Public Health and the Environment, 146–61. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-0311-9.ch007.
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Colour is the most important part to make any fabric attractive, but its use for dying has become a major environmental hazard. Colloidal particles present with color increases the turbidity, gives bad appearance, foul odour, and obstructs the penetration of sunlight into water bodies required for the photosynthesis process, which interferes with the oxygen flow mechanism and hence marine life. So, it is essential to remove such pollutants from the waste water before its final disposal into water bodies. Photocatalysis is one of the advance oxidation processes, mainly carried out in the presence of light and suitable photocatalytic materials for the degradation of dyes. This chapter outlines the background of dye chemistry, the application areas, and the impact of dyeing effluents in the environment and on living beings.
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Kalivel, Parameswari. "Treatment of Textile Dyeing Waste Water Using TiO2/Zn Electrode by Spray Pyrolysis in Electrocoagulation Process." In Dyes and Pigments - Novel Applications and Waste Treatment. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95325.
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An alternative form of treatment for the remediation of textile waste water, electrocoagulation (EC) methods are used. This work deals mainly with the treatment of waste water for textile dyeing preceded by the use of wastewater. The goal of the proposed study is to evaluate the efficiency of the electrocoagulation process using TiO2/Zn electrodes using TiCl3 via spray pyrolysis. The surface morphology of the electrode was studied by SEM, XRD and EDS analysis. The efficiency of electrocoagulation treatment process to treat synthetic waste water containing Coralene Navy RDRLSR, Coralene Red 3G, Rubru RD GLFI dye was studied. The effect of parameters such as current density, influence of effluent pH, supporting electrolyte NaCl concentration, and EC time on dye removal efficiency were investigated. The result indicates that this process is very efficient and was able to achieve color removal (99.5%) at pH 8.5 and 0.15 A in 10 minutes.
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Unnikrishnan, Sneha, Nagamani Bora, and Karthikeyan Ramalingam. "Bioremediation." In Handbook of Research on Resource Management for Pollution and Waste Treatment, 294–317. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-0369-0.ch013.
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Synthetic dyes are extensively used in several industries and the dyes are great concern for the ecosystem. During the dyeing process, a certain percentage of the used dye is released into the wastewater, causing severe environmental and health hazards. The physiochemical methods are not sustainable due to high-cost, high-energy requirements and hazardous by-products. Among all the alternative technologies to conventional wastewater treatment, bioremediation has emerged as the most desirable approach to clean up the environment and to restore its original status. The ability of microbes in decolorizing the textile effluents is significant. The decolorization can be further enhanced using immobilization techniques. Immobilization increases the stability and reusability of the microorganisms. The microorganisms can be entrapped in calcium alginate beads, that can be used to construct a packed bed reactor in which dye decolorization can be carried out on a large scale. Thus, bioremediation serves as an effective, eco-friendly solution for the pollution caused by textile dye effluents.
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Agrawal, Bipin Jagdishprasad. "Prospective Sustainability of Utilization of Effective Techniques for Remediation of Heavy Metals From Textile Effluents." In Biostimulation Remediation Technologies for Groundwater Contaminants, 19–49. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-4162-2.ch002.
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Textile industries are one of the prevalent water consumers and contaminators ensuing high generation of waste water. Wastewater from dyeing and printing units is often rich in organic compounds, colours, and heavy metals containing residues of various dyes and chemicals. Among these waste water pollutants, heavy metals are of serious environmental concern in recent years. Metals are extensively used for manufacture of synthetic dyestuffs and for colouration of natural dyes on textiles to achieve different shades and hues. Heavy metals such as lead (Pb), chromium (Cr), cadmium (Cd), iron (Fe), zinc (Zn), copper (Cu), etc. are widely used for production of colour pigments of textile dyes. These heavy metals, highly toxic, get conveyed to the environment, and can bio-accumulate in the human body, aquatic life, natural water-bodies, and also possibly become trapped in the soil. The chapter deals with the utilization of heavy metals in textile wet processing, their important characteristics, various toxic aspects, and different methods for their elimination from the textile effluent liquors.
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Singh, Rajender, and Mamta Chauhan. "Effective Management of Agro-Industrial Residues as Composting in Mushroom Industry and Utilization of Spent Mushroom Substrate for Bioremediation." In Advances in Environmental Engineering and Green Technologies, 158–77. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9734-8.ch008.
Full textAbstract:
Different types of edible mushrooms like Agaricus, bisporus, A. bitoriqus, Pleurotus spp., Volvariella volvacea, Lentinula edodes, Calocybe indica, Flamullina, Ganoderma lucidum etc. are cultivated in industrial scale. Majority of edible fungi secretes extracellular Ligninocellulolytic enzymes like Laccase, lignin peroxidase, manganese peroxidase, cellulase etc. for effective conversion of ligninocellulolytic substrate to compositing form which led to fruiting of mushrooms. Consequently, an adequate disposal method is needed for the high quantities of spent mushroom substrate (SMS) generated in this agro-food industrial activity. On the other side, textile industry among the largest water consuming industries in the world and approximately, 10,000 different dyes and pigments are used at industrial scale. It is estimated that nearly 40% of the total dyes used in the dyeing process may find their way in wastewater. So, there is an attempt to utilize the ligninolytic enzymes rich SMS of different mushroom for efficiently biodegradation of textile wastewater & polyaromatic pollutants.