کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8960247 | 1646397 | 2018 | 39 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of process parameters for the chemical leaching of base metals from telecom and desktop printed circuit boards
ترجمه فارسی عنوان
بهینه سازی پارامترهای فرآیند شستشوی شیمیایی فلزات پایه از صفحات مدار چاپی و مخابراتی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
End-of-life electrical and electronic equipment are secondary sources of metals that can complement natural ores. Printed circuit boards (PCB) are an important resource from which base metals such as Cu, Ni, and Zn can be leached and recovered. Three types of PCB were studied: two boards from telecom equipment (T1 and T2) and one from a desktop with the aim to optimize the process parameter and determine the Cu, Ni and Zn content from T1, T2 and desktop PCB. Chemical leaching using sulphuric acid (H2SO4) and hydrogen peroxide (H2O2) was studied in batch reactors, upflow columns and stirred tank reactors (STR). The parameters optimized were pulp density (PD), H2SO4 and H2O2 concentration, stirring speed (RPM), and particle size for a contact time of 18âh. The optimum conditions for Cu, Ni and Zn leaching were: 4.3âM H2SO4, 4.8âM H2O2, 194 RPM, 0.1 (%, w/v) PD and 0.5âmm particle size. In batch conditions, a Cu leaching efficiency of 80% was achieved for PCB from T1, T2, and desktop. Furthermore, a maximum Cu recovery efficiency of 25.6 and 77.6% was obtained from T1 PCB in, respectively, the upflow column and STR in 5âh for the particle size fraction 0.5-1.6âmm. T1 exhibited a higher metal content than T2 and desktop PCB. The smaller particle size, the high concentration of lixiviant and low PD increased the chemical leaching efficiency of Cu from PCB.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 120, November 2018, Pages 14-23
Journal: Process Safety and Environmental Protection - Volume 120, November 2018, Pages 14-23
نویسندگان
Bienvenu Mizero, Thresa Musongo, Eldon R. Rene, Ferdi Battes, Piet N.L. Lens,