حذف رنگ از محلولهای آبی توسط پنتا آزا تترا اتیلن ساپورت شده بر روی پلی اکریل آمید به عنوان یک جاذب جدید: بررسی سینتیک و ایزوترم جذبی
محورهای موضوعی : فصلنامه علمی - پژوهشی مواد نوینمریم ایران پور 1 , محمد علی زارع 2 , عبدالحمید فدوی 3 , معصومه عمادی 4
1 - باشگاه پژوهشگران جوان و نخبگان، واحد شیراز، دانشگاه آزاد اسلامی، شیراز، ایران
2 - باشگاه پژوهشگران جوان و نخبگان، واحد مرودشت، دانشگاه آزاد اسلامی، مرودشت، ایران
3 - گروه شیمی، واحد مرودشت، دانشگاه آزاد اسلامی، مرودشت، ایران
4 - گروه شیمی، واحد مرودشت، دانشگاه آزاد اسلامی، مرودشت، ایران
کلید واژه: سینتیک, بروموکروزول سبز, جاذب, ایزوترم تعادلی,
چکیده مقاله :
هدف این تحقیق، حذف مولکول‌های رنگ بروموکروزل سبز[1] (BCG) از محلولهای آبی می‌باشد. جاذب پلی اکریل آمید اصلاح شده با پنتا آزا تترا اتیلن (PATE-N5) برای حذف رنگ بروموکروزول سبز به عنوان یک رنگ صنعتی از محلولهای آبی استفاده شده است. آزمون‌ها به روش غیر جاری[2] با استفاده از پارامترهای مختلفی مانند pH، زمان تماس، مقدار جاذب و غلظت اولیه رنگ استفاده شده است و خصوصیات جاذب (PATE-N5) با استفاده از دستگاه FTIR مورد آنالیز قرار گرفته است. داده‌های تجربی به دست آمده با مدل‌های سینتیکی مختلف شامل مرتبه درجه اول، مرتبه درجه دوم، نفوذ درون ذره‌ای و الوویچ مورد بررسی قرار گرفت، نتایج نشان داد که داده‌های تجربی به دست آمده با مدل سینتیکی مرتبه دوم تطابق مطلوبی دارند. مطالعه ایزوترم تعادلی به‌وسیله مدل‌های لانگمیر، فرندلیچ و تمکین آنالیز شد. آنالیز نتایج نشان داد که جذب رنگ توسط جاذب (PATE-N5) اصلاح شده تطابق مطلوبی با معادله تمکین در دمای 25 درجه سانتی‌گراد دارد. بیشینه ظرفیت جذب برای غلظت اولیه 76 میلی‌گرم بر لیتر، 87/101 میلی‌گرم بر گرم به دست آمد.
[1]- Bromocresol green
[2]- Batch
Modified cross-linked polyacrylamide (PAA) with penta aza tetra ethylene group was used for the removal of Bromocroso green (BCG), industrial dye from aqueous solutions. Batch mode experiments were conducted using various parameters such as pH, contact time, amount of adsorbent and BCG concentration and characterized with FTIR analyses. Fitting the experimental data to different kinetic models including pseudo-first-order, pseudo-second-order, Elovich and intra-particle diffusion kinetic models show the suitability of the pseudo-second-order kinetic model to interpret in the experimental data. The experimental isotherm data were analyzed using Langmuir, Freundlich and Temkin isotherm models. The results showed that the adsorption behavior of BCG on modified adsorbent were well-fitted with the Temkin model at 25˚C. The maximum adsorption capacity was 101.87 mg/g for initial concentration 76 mgL-1.
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