چاپ صفحه |  صفحه نخست سامانه |  نویسندگان |  اطلاعات تفضیلی | مؤسسه علوم و صنایع غذایی |
| کد مقاله | 1656 |
| عنوان فارسی مقاله | Synthesis and characterization of novel zero-valent iron based trimetallic supported on bentonite nanocatalyst and its application in dye reduction |
| عنوان لاتین مقاله | Synthesis and characterization of novel zero-valent iron based trimetallic supported on bentonite nanocatalyst and its application in dye 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 | |
| چکیده | Background: Nanozero-valent iron (nZVI) based catalysts, because of their large surface area, high reactivity, strong reductive capacity, and cost-effective, have been used as reducing composite. NZVI is a potential reductive composite because of its sufficient mobility and low toxicity. It can instantaneously adsorb and reduced anionic dyes on its surface. Though, the aggregation tendency of nZVI refers to intrinsic magnetic interactions and high surface energy. This limits its dispersibility. Also, in aqueous media, reductive property of nZVI decrease significantly due to quick formation of a Fe oxide and hydroxide layer on its surface. Supporting nZVI on graphene oxide (GO) results efficient dispersion of nZVI which prevents its aggregation causing greater reduction performance. |
| متن مقاله | Methods: In this study, nanozero-valent iron (nZVI) based trimetallic nanoparticle supported on GO was synthesized [1, 2]. The reduction of tartrazine and sunset yellow by the proposed nanocatalyst was examined using the batch experiments technique and all involved parameters affecting the reduction led and optimized by response surface methodology. Results: The synthesized GO@Fe-Cu-Ag trimetallic particles were characterized by TEM, FT-IR, XRD, SEM, EDS and BET. The results showed that the nZVI trimetallic was successfully synthesized and immobilized on GO. The optimum conditions for reduced sunset yellow and tatrazine dyes are respectively: pH= 5.5 and 3, dose of nanocomposite= 4 and 4 mg mL-1, time= 30 and 26 min, initial dyes concentration= 100 and 100 ppm , the kinetic data for nanocatalyst were fitted well with the pseudosecond order model. |
| نتیجه مقاله | The experimental results of the present research indicated that the presence of GO as support could decrease the aggregation of nZVI and increase it's adsorption and reactivity. Furthermore, high reactivity of Fe0-based trimetals was mainly attributed to the plating order of transition metals (i.e., Cu and Ag). Theory is that the trimetallic structure of Fe-Cu-Ag could improve the electron transport and create active sites with high electron density at the surface (Ag layer) that could enhance the generation of surface-bonded atomic hydrogen ([H]abs) or the direct reduction of pollutant. GO@Fe-Cu-Ag trimetallic system would be a promising process for the removal of the dyes from food industrial wastewater. |
