کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
581015 | 1453155 | 2010 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fabrication of a selective mercury sensor based on the adsorption of cold vapor of mercury on carbon nanotubes: Determination of mercury in industrial wastewater
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A new sensor for the determination of mercury at μg mlâ1 levels is proposed based on the adsorption of mercury vapor on single-walled carbon nanotubes (SWCNTs). The changes in the impedance of SWCNTs were monitored upon adsorption of mercury vapor. The adsorption behaviour of mercury on SWCNTs was compared with that on multi-walled carbon nanotubes (MWCNTs) and carbon nanofibers (CNFs). Cold vapor of mercury was generated at 65 °C using Sn(II) solution as a reducing agent. The limit of detection was 0.64 μg mlâ1 for Hg(II) species. The calibration curve for Hg(II) was linear from 1.0 to 30.0 μg mlâ1. The relative standard deviation (RSD) of eight replicate analyses of 15 μg mlâ1 of Hg(II) was 2.7%. The results showed no interfering effects from many foreign species and hydride forming elements. The system was successfully applied to the determination of the mercury content of different types of wastewater samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 173, Issues 1â3, 15 January 2010, Pages 622-629
Journal: Journal of Hazardous Materials - Volume 173, Issues 1â3, 15 January 2010, Pages 622-629
نویسندگان
Afsaneh Safavi, Norouz Maleki, Mohammad Mahdi Doroodmand,