Academic Journal

Full Factorial Design for Gold Recovery from Industrial Solutions

التفاصيل البيبلوغرافية
العنوان: Full Factorial Design for Gold Recovery from Industrial Solutions
المؤلفون: Maria Mihăilescu, Adina Negrea, Mihaela Ciopec, Petru Negrea, Narcis Duțeanu, Ion Grozav, Paula Svera, Cosmin Vancea, Alina Bărbulescu, Cristian Ștefan Dumitriu
المصدر: Toxics, Vol 9, Iss 5, p 111 (2021)
بيانات النشر: MDPI AG, 2021.
سنة النشر: 2021
المجموعة: LCC:Chemical technology
مصطلحات موضوعية: Amberlite XAD7, Am-L-GA, L-glutamic acid, factorial design, Chemical technology, TP1-1185
الوصف: Gold is one of the precious metals with multiple uses, whose deposits are much smaller than the global production needs. Therefore, extracting maximum gold quantities from industrial diluted solutions is a must. Am-L-GA is a new material, obtained by an Amberlite XAD7-type commercial resin, functionalized through saturation with L-glutamic acid, whose adsorption capacity has been proved to be higher than those of other materials utilized for gold adsorption. In this context, this article presents the results of a factorial design experiment for optimizing the gold recovery from residual solutions resulting from the electronics industry using Am-L-GA. Firstly, the material was characterized using atomic force microscopy (AFM), to emphasize the material’s characteristics, essential for the adsorption quality. Then, the study showed that among the parameters taken into account in the analysis (pH, temperature, initial gold concentration, and contact time), the initial gold concentration in the solution plays a determinant role in the removal process and the contact time has a slightly positive effect, whereas the pH and temperature do not influence the adsorption capacity. The maximum adsorption capacity of 29.27 mg/L was obtained by optimizing the adsorption process, with the control factors having the following values: contact time ~106 min, initial Au(III) concentration of ~164 mg/L, pH = 4, and temperature of 25 °C. It is highlighted that the factorial design method is an excellent instrument to determine the effects of different factors influencing the adsorption process. The method can be applied for any adsorption process if it is necessary to reduce the number of experiments, to diminish the resources or time consumption, or for expanding the investigation domain above the experimental limits.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2305-6304
Relation: https://www.mdpi.com/2305-6304/9/5/111; https://doaj.org/toc/2305-6304
DOI: 10.3390/toxics9050111
URL الوصول: https://doaj.org/article/fe30233d61e74e29875886c5922cfb5e
رقم الانضمام: edsdoj.fe30233d61e74e29875886c5922cfb5e
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:23056304
DOI:10.3390/toxics9050111