توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Kinetic Study of the Dissolution of Butyric Acid–1, 8– Naphthalimide–4–Azo–Hydroxy Benzene as a New Disperse Dye in the Presence of Two Conventional Surfactants
نویسنده(ها): ، ،
اطلاعات انتشار: سومین کنگره بین المللی رنگ و پوشش، سال
تعداد صفحات: ۱۰
In this paper, dissolution of a new disperse dye derived from naphthalimide was investigated in the presence of anionic and nonionic surfactants. In addition, the important factors such as surfactant concentration, temperature and time in dissolution of a disperse dye were evaluated. The dissolution kinetic of dye in water at different temperatures shows that the dissolution rate is according to exponential equation. The maximum and minimum values of dissolution rate of dye were at 25 C and 80 C, respectively. The dye dissolution rate in anionic surfactant was greater than the nonionic surfactant.<\div>

۲Decolorization of acid red 119 dye from synthetic wastewater by sludge of water treatment plant
نویسنده(ها): ، ،
اطلاعات انتشار: اولین کنفرانس بین المللی تصفیه فاضلاب و بازیافت آب، فناوری ها و یافته های نو، سال
تعداد صفحات: ۷
In this research, ferric chloride sludge (FCS) of a water treatment plant was used as an alternative coagulant for removal of acid red 119 dye. For this purpose, the effect of pH, adsorbent (FCS) dose and initial dye concentration on dye removal efficiency were investigated. Results showed that the dye removal rates were largely dependent on the pH. When the solution pH was increased from 3 to 8, the dye removal rates decreased from 96.3% to 2.3%. The removal efficiencies of the dye using 130–350 mg dried FCS\L were more than 90% at pH =3. With the increase of initial dye concentration in the range of 10–200 mg\L, the removal efficiency increased at first (from 10–40 mg\L) and then declined. So, FCS can be considered as an appropriate coagulant for the removal of acid red 119 dye.<\div>

۳Elimination of Acid Yellow 36 by PPI Dendrimer–Chitosan Hybrid: Preparation, Characterization, RSM, Kinetic and Isotherm Adsorption Study
اطلاعات انتشار: کنفرانس بین المللی فرآورش پلیمرها، سال
تعداد صفحات: ۵
A biopolymer (Chitosan–Poly Propylen Imine) (CS–PPI) as a bio–adsorbent for adsorption of textile acid dye was prepared. CS–PPI was characterized by Fourier transform infra–red (FTIR). The obtained results confirmed that the linkage of NH2 groups of PPI dendrimer onto modified chitosan containing carboxylic acid groups was accomplished chemically. Acid Yellow 36 (AY36) was used as a model pollutant. Response Surface Methodology (RSM) was applied to estimate the simple and combined effects of the operating variables including initial pH, initial dye concentration, time contact and temperature. Under the optimal values of process parameters, the dye removal performance was 99%. The data were evaluated for agreement with the Langmuir, Freundlich and Temkin isotherm models. It was found that AY36 followed by Langmuir isotherm. The adsorption kinetics of dye was found to confirm to pseudo–second order kinetics. Based on the data of present study, one could conclude that the CS–PPI being a biocompatible, eco–friendly and high performance adsorbent might be a suitable alternative for elimination of acid dyes from colored aqueous solutions<\div>
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