چاپ صفحه |  صفحه نخست سامانه |  نویسندگان |  اطلاعات تفضیلی | مؤسسه علوم و صنایع غذایی |
| کد مقاله | 1657 |
| عنوان فارسی مقاله | A novel and efficient nanozero-valent iron based nanocatalyst immobilized on graphene oxide for dyes reduction |
| عنوان لاتین مقاله | A novel and efficient nanozero-valent iron based nanocatalyst immobilized on graphene oxide for dyes reduction |
| عنوان همایش علمی معتبر | |
| نوع همایش | کنفرانس |
| کشور محل برگزاری کنگره/ همایش | ایران |
| سال انتشار/ ارائه شمسی | |
| سال انتشار/ارائه میلادی | 2019 |
| تاریخ برگزاری | 1398/06/03 |
| نویسنده | نفر چندم مقاله |
|---|---|
| ابراهیم فولادی | سوم |
| مهرناز یحیائیان | اول |
| علی زراعتکار مقدم | دوم |
| عنوان | متن |
|---|---|
| AAbstract | Background: Tartrazine (Ta) and sunset yellow (SY) are synthetic food colors used most extensively as food additives, to improve the appearance, color, and texture of foods. When added in excess, however, these synthetic food colors can be pathogenic. Therefore, it is important to develop effective methods for removing these synthetic colors from aqueous media. Different methods were applied for this purpose, and among these methods, chemical reduction by a cheap and eco-friendly nanocatalyst is the most efficient and simplest method. |
| چکیده | |
| متن مقاله | Methods: Nanozero-valent iron (nZVI) based trimetallic nanoparticle supported on bentonite clay as a new low-cost and eco-friendly nanocatalyst was synthesized [1, 2], characterized and then applied for the reduction of sunset yellow and tartrazine as model dyes from aqueous solutions. The reduction of the model dyes by this new nanocatalyst was examined using batch technique and all parameters influencing the reduction procedure were considered. Results: Central composite design (CCD) was used to model and optimized the reduction procedure. Both coefficients of determination (R2) and adjusted-R2 obtained from the analysis of variance (ANOVA) were above 0.9, ensuring a satisfactory adjustment of the model with experimental results. The optimum conditions for reduced sunset yellow and tartrazine dye are respectively: time= 26.7 and 27 min, pH= 3 and 3, dose of nanocatalyst 3.6 and 4 mg mL-1, initial dyes concentration= 100 and 100 ppm. The interaction effects of significant parameters were also considered and the results showed that there is no interaction between the parameters in the case of SY while there are interactions between pHconcentration and dose-concentration. Under the defined optimum conditions, the kinetic models parameters were investigated and the results showed the pseudo-second order model has good agreement with the procedure. Finally, under the defined optimum condition, the proposed nanocatalyst was successfully applied for dyes reduction from food industrial wastewaters |
| نتیجه مقاله | Conclusion: The nanocatalyst for Ta and SY dyes reduction simultaneously from aqueous solution are reported. The results suggest that the bentonite could e ectively lighten the aggregation of nZVI trimetallic nanoparticles and enhance their reactivity towards dyes. |
