Sorption behaviour of fluorinated azo sulphonated dyes by silk fibre

Qian, Jiahe; Hamada, Kunihiro; Mitsuishi, Masaru

doi:10.1016/0143-7208(93)80003-j

Cited by 11 publications

(9 citation statements)

References 12 publications

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“…The K p , n, and K L values determined at pH 3 are given in Tables 1-3, together with those determined in the absence of the bolaform electrolyte [17]. At pH 4 and in water the parameters could not be calculated accurately because K L and n were very small.…”

Section: Methodsmentioning

confidence: 99%

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Effects of a bolaform electrolyte on the sorption of acid dyes by a silk fibre

Hamada

Qian

Mitsuishi

1999

Coloration Technology

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The sorption behaviour of sodium 1-phenylazo-2-hydroxy-6-naphthalenesulphonate and sodium 1-(3methylphenylazo)-2-hydroxy-6-naphthalenesulphonate by a silk fibre was investigated in the presence and absence of a bolaform electrolyte. The addition of the bolaform electrolyte influenced the dye sorption to an extent that was dependent on the pH of the dyebath. At pH 3 the amount of dye sorbed by the silk fibre decreased slightly with increasing bolaform electrolyte concentration, while at pH 4 and in pure water it increased. The sorption parameters determined from the sorption isotherms considering the dual sorption mechanism were affected by the addition of the bolaform electrolyte: most importantly, the partition coefficients were significantly enhanced. Furthermore, the effects of the bolaform electrolyte on the dye sorption by the silk fibre were quite different to those seen with a nylon 6 film.

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Section: Methodsmentioning

confidence: 99%

“…In the present study, we have investigated the sorption behaviour of acid dyes by a silk fibre in the presence of a bolaform electrolyte containing two cationic groups (bisquaternary ammonium) and compared this with the sorption behaviour of silk fibre alone [17].…”

Section: Introductionmentioning

confidence: 99%

Effects of a bolaform electrolyte on the sorption of acid dyes by a silk fibre

Hamada

Qian

Mitsuishi

1999

Coloration Technology

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“…As described in the previous section, the previous papers [4,5] demonstrate that the Langmuir type sorption does not depend on time, whereas the partition type sorption does. Therefore, the sorption isotherms were determined on the basis of the dye sorption for 1 day.…”

Section: Sorption Isothermsmentioning

confidence: 84%

“…We have investigated the effects of fluorine atoms on the sorption of acid dyes containing a trifluoromethyl group by a nylon 6 film [2][3][4] and a silk fiber [5]. As a result, the introduction of the fluorine atoms made enthalpy change and entropy change for the Langmuir type sorption more exothermic and less entropic, respectively, in the case of the nylon 6 film.…”

Section: Introductionmentioning

confidence: 99%

Sorption of Fluorinated Azo Dyes Containing Two Sulfonate Groups by a Nylon 6 Film.

1999

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“…Huang et al [5] used flow-adapted discrete velocities, a non-unique equilibrium distribution constrained by a set of linear moments and used interpolated nodes. Prendergast and Xu [6], Kim et al [7] and Koltelnikov and Montgomery used Bhatnagar-Gross-Krook type model [8] to establish new type flux and employed TVD flux limitation with the neighborhood cells, Rena et al [9], Vahala et al [10] , Qian [11,12],Sun [13], De Cicco et al [14], Mason [15,16], Yan [17,18], and Kataoka and Tsutahara [19,20] proposed many models by using additional techniques to achieve higher Mach number for the compressible flows [21]. Among the existing models for the compressible flows, the one by Kataoka and Tsutahara (KT) has a simple and rigorous theoretical background [22].…”

Section: Introductionmentioning

confidence: 99%

Entropy and Weak Solutions in the Thermal Model for the Compressible Euler Equations

Zheng

2009

Int. J. Mod. Phys. C

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Among the existing models for compressible fluids, the one by Kataoka and Tsutahara (KT model, Phys. Rev. E 69, 056702, 2004) has a simple and rigorous theoretical background. The drawback of this KT model is that it can cause numerical instability if the local Mach number exceeds 1. The precise mechanism of this instability has not yet been clarified. In this paper, we derive entropy functions whose local equilibria are suitable to recover the Euler-like equations in the framework of the lattice Boltzmann method for the KT model. Numerical examples are also given, which are consistent with the above theoretical arguments, and show that the entropy condition is not fully guaranteed in KT model. The negative entropy may be the inherent cause for the non-physical oscillations in the vicinity of the shock. In contrast to these Karlin's microscopic entropy approach, the corresponding subsidiary entropy condition in the LBM calculation could also be deduced explicitly from the macroscopic version, which provides some insights on the numerical instability of the lattice Boltzmann model for shock calculation.

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Sorption behaviour of fluorinated azo sulphonated dyes by silk fibre

Cited by 11 publications

References 12 publications

Effects of a bolaform electrolyte on the sorption of acid dyes by a silk fibre

Effects of a bolaform electrolyte on the sorption of acid dyes by a silk fibre

Sorption of Fluorinated Azo Dyes Containing Two Sulfonate Groups by a Nylon 6 Film.

Entropy and Weak Solutions in the Thermal Model for the Compressible Euler Equations

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