Environment friendly finishing of sulphur, vat, direct and reactive dyed cotton fabric

Mohsin, Muhammad; Rasheed, Abher; Farooq, Assad; Ashraf, Munir; Shah, Aamir Hassan

doi:10.1016/j.jclepro.2013.04.018

Cited by 43 publications

(15 citation statements)

References 9 publications

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“…These differences may be related to the complexity of solid/liquid systems. These 1/T × 10 3 (K -1 ) 10 results are similar to those obtained by Mckay et al [39] and by Hwang and Chen [40], 6.2 and 25.6 kJ mol À1 . As shown in Figure 3b, a logarithmic relationship between the adsorption heat and the adsorbed amount in equilibrium was observed, which is in agreement with the fact that the Freundlich model fitted the experimental data well.…”

Section: Isosteric Heat Of Adsorptionsupporting

confidence: 90%

Adsorption equilibrium studies of a simulated textile effluent containing a wool reactive dye on gallinaceous feathers

Freitas

Moura

Figueiredo

et al. 2016

Coloration Technology

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Gallinaceous feathers (from Gallus gallus domesticus, strains Cobb 500 and Label) were used as adsorbent for colour removal from a simulated textile effluent containing a wool reactive dye, the Yellow Lanasol 4G (CI Reactive Yellow 39). A brief chemical and physical characterisation of feathers was performed. Equilibrium studies at different selected temperatures, in the range 10–60 °C, were carried out. The equilibrium data were analysed using the Freundlich and Langmuir isotherm models. Adsorption capacity strongly increases with temperature. A maximum adsorption capacity of around 300 mg g−1 was obtained for Gallus gallus feathers, strain Cobb 500, at 60 °C, while for strain Label, 200 mg g−1 was obtained at 50 °C. For each type of feather a generalised model, valid for a given temperature range, was obtained. The isosteric heat of adsorption calculated was positive, so the mechanism involved in the adsorption process should correspond to endothermic chemisorption. This study provides important information concerning the use of gallinaceous feathers without any chemical treatment for colour removal from real textile wastewaters. The results in this study indicated that gallinaceous feathers, when compared with activated carbon, open promising perspectives concerning their utilisation for colour removal from textile effluent discharged at high temperatures; moreover, it would be an alternative for the valorisation of this waste.

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Section: Isosteric Heat Of Adsorptionsupporting

confidence: 90%

Adsorption equilibrium studies of a simulated textile effluent containing a wool reactive dye on gallinaceous feathers

Freitas

Moura

Figueiredo

et al. 2016

Coloration Technology

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show abstract

“…As a result, the demand of water resources will increase 55% until 2050. Textile industries are major consumers of water and fuel, once around of 50% of their costs are on fibers washing and wastewater (Mohsin, Rasheed, Farooq, Ashraf, & Shah, 2013). Among the dyes diversity, the reactive ones are detectable at concentrations above 5 μg L -1 (Brites-Nóbrega, Santana, & Fernandes-Machado, 2011).…”

Section: Introductionmentioning

confidence: 99%

<b>Synergistic effect between oxides semiconductors and zeolites on photobleaching of RB250 textile dye

et al. 2018

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The present work aims to evaluate the activity of semiconductor oxides (TiO 2 , Nb 2 O 5 and ZnO) supported on NaA and NaY zeolites, as well as their synergistic effect on Reactive Blue Dye (RB250) photodegradation process. Prior to deposition, TiO 2 particles size was reduced by ultrasonic scattering followed by filtration. The particles on the filtrate were used to conduct the experiments. The semiconductors were immobilized in concentrations of 2.5, 5 and 10% (w w -1 ) and the photocatalytic tests were performed at catalyst concentrations of 1 and 2 g L -1 . Moreover, supported catalysts were characterized by XRD, textural analysis, zero point of charge and temperature programmed desorption of NH 3 . A comparison between the supported catalysts showed high activity for the ones supported with ZnO and TiO 2 . Zeolite NaY has broader opened channels than NaA, which reduces the dye molecules blockage, and, as a result, increased the catalyst activity. A higher concentration of supported catalysts (2 g L -1 ) provides greater photocatalytic activity, while higher concentration of semiconductors immobilized on supports does not present significant differences.Efeito sinérgico entre óxidos semicondutores e zeólitas no fotoclareamento do corante têxtil RB250 RESUMO. O objetivo deste trabalho foi avaliar a atividade dos óxidos semicondutores (TiO 2 , Nb 2 O 5 & ZnO) suportados nas zeólitas NaA e NaY e seu efeito sinérgico na fotodegradação do corante têxtil azul reativo (RB250). Antes da deposição, o tamanho das partículas de TiO 2 foi reduzido por dispersão em ultrassom seguido por filtração e foram utilizadas as partículas que passaram através do filtro. Os semicondutores foram imobilizados em concentrações de 2,5, 5 e 10% (m m -1 ) e os testes fotocatalíticos foram realizados em concentrações de catalisador de 1 e 2 g L -1 . Os catalisadores suportados foram caracterizados por DRX, análise textural, ponto de carga zero e dessorção por temperatura programada. Os catalisadores suportados com ZnO e TiO 2 mostraram maior atividade do que o Nb 2 O 5 . Os testes fotocatalíticos indicaram um aumento na atividade dos catalisadores suportados em NaY sendo essa com resultados superiores aos encontrados com a zeólita NaA. Isso por causa dos seus canais mais estreitos que dificultam a entrada de moléculas do corante. A maior concentração de catalisadores suportados (2 g L -1 ) proporciona maior atividade fotocatalítica, enquanto a maior concentração de semicondutores imobilizados em suportes não apresenta diferenças significativas.

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“…Ammonium phosphate salts are one such alternative [10] but its performance is far less than the commercial Pyrovatex and THPC. Carboxylic acids are good alternative for formaldehyde based cross-linkers [11][12][13][14]. Researchers have reported the use of butane tetra carboxylic acid (BTCA) as fire retardant enhancer with Pyrovatex but BTCA is very expensive and Pyrovatexitself is toxic.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of diammonium hydrogen phosphate as halogen and formaldehyde free sustainable fire retardant

Qutab¹,

Mohsin²,

Ramzan³

et al. 2019

Ind. Tex.

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Îmbunătățirea performanței hidrogenofosfatului de diamoniu ca ignifugant durabil fără halogen și formaldehidă Ignifuganții pe bază de fosfor sunt utilizați în general pentru a conferi un caracter ignifug țesăturii de bumbac. Cu toate acestea, majoritatea ignifuganților eficienți pe bază de fosfor pentru textile conțin halogen toxic și/sau formaldehidă. Hidrogenofosfatul de diamoniu nu conține halogen sau formaldehidă, dar performanța sa este mult mai mică decât a substanțelor ignifuge disponibile în comerț. Prin urmare, în acest studiu, hidrogenofosfatul de diamoniu a fost polimerizat cu agenți de reticulare fără conţinut de formaldehidă, cum ar fi acidul acrilic și acidul maleic. Concentrațiile de monomeri și inițiatori, condițiile de polimerizare și temperatura au fost optimizate. Țesătura tratată pe baza noii rețete a prezentat performanțe bune de ignifugare, precum și proprietăți suplimentare ale controlului contracției, îngrijire ușoară și proprietăți antimicrobiene. Testarea analitică SEM, FTIR și a conținutului de fosfor a confirmat, de asemenea, aplicarea cu succes a finisajului. Cuvinte-cheie: ignifugant, finisare cu îngrijire ușoară, controlul contracției, antimicrobian, sare de fosfat Performance enhancement of diammonium hydrogen phosphate as halogen and formaldehyde free sustainable fire retardant Phosphorous based fire retardants are commonly used for imparting fire retardancy to the cotton fabric. However, most of theeffective phosphorous based fire retardants for textile contain toxic halogen and/or formaldehyde. Diammonium hydrogen phosphate does not contain halogen or formaldehyde but its performance is far less than the commercially available fire retardants. Therefore, in this research Diammonium hydrogen phosphate was polymerized with zero formaldehyde based cross-linkers like acrylic acid and maleic acid. Concentrations of monomers and initiator, polymerization conditions and temperature were optimized. Newly developed recipe treated fabric exhibited good fire retardancy performance as well as additional properties of shrinkage control, easy care and anti-microbial. Analytical testing of SEM, FTIR and phosphorous content also confirmed the successful application of the finish.

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Environment friendly finishing of sulphur, vat, direct and reactive dyed cotton fabric

Cited by 43 publications

References 9 publications

Adsorption equilibrium studies of a simulated textile effluent containing a wool reactive dye on gallinaceous feathers

Adsorption equilibrium studies of a simulated textile effluent containing a wool reactive dye on gallinaceous feathers

<b>Synergistic effect between oxides semiconductors and zeolites on photobleaching of RB250 textile dye

Performance enhancement of diammonium hydrogen phosphate as halogen and formaldehyde free sustainable fire retardant

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