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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Particle Science & Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Adsorption,Kinetics,Taguchi Method,Crystal violet (CV+),Surfactant-modified dolomite
- چکیده:
- چکیده انگلیسی: This paper presents the adsorption of crystal violet (CV+) from aqueous solution on surfactant-modified dolomite. Liquid phase batch operations were carried out to observe the effect of various experimental parameters such as initial dye concentration, adsorbent dosage, pH and NaCl concentration. The optimum conditions for these parameters were calculated by Taguchi method. Equilibrium isotherm data were analyzed according to Langmuir, Freundlich and Temkin equations. The experimental data fitted well to Freundlich adsorption model. The maximum adsorption capacities by Langmuir analysis were determined to be 49.261mg/g at 22℃ that indicates suitable performance by of this adsorbent. The pPseudo-first-order and, pseudo-second-order kinetics and the intraparticle diffusion models were also evaluated for the adsorption of CV+ onto surfactant-modified dolomite. The positive value of free energy change confirmed the nature of physisorption of dye onto adsorbent.
- انتشار مقاله: 27-10-1395
- نویسندگان: Maryam Arabpour,Ahmad Rahbar-Kelishami,Reza Norouzbeigi
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Rehabilitation Sciences and Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Microstructure,Bilingualism,Narrative,Balochi language
- چکیده:
- چکیده انگلیسی: Background: To date, with rapid increase of bilingual children, more attention about different patterns of the bilingual children narratives is needed. The aim of this study was to compare microstructure level of narratives generated by typical developing kindergarten children who were bilingual in Persian and Balochi with monolingual Persian speakers.Method: Thirty Persian-speaking monolingual and thirteen available bilingual children (aged 48 months old) participated in this study. Children’s story telling was audio-recorded and analyzed using the Persian-NAP (Narrative Assessment Protocol) guidelines. Results: All of the NAP indicators include of group structure, phrase structure, modifiers, noun and verbs didn’t show significant difference between monolingual and bilingual children (0.06≤p≤0.5).Conclusion: We didn’t find different performance in the five NAP indicators between bilingual and monolingual children. It may be suggested that the different patterns of creating phrases and sentences in two languages don’t affect the grammatical use of them in second language.
- انتشار مقاله: 02-09-1396
- نویسندگان: Maryam Arabpour,Mahbube Nakhshab,Najme Abdolrashidi,Mahtab Molaiefard,Shima Bakhtyari,Hossein Ansari
- مشاهده