کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6305987 | 1618804 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effective degradation of organic water pollutants by atmospheric non-thermal plasma torch and analysis of degradation process
ترجمه فارسی عنوان
تجزیه موثر آلاینده های آلی آب توسط مشعل پلاسما غیر حرارتی جوی و تجزیه و تحلیل روند تخریب
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
The paper reports the use of atmospheric non-thermal plasma torch as a catalyst for degradation of various organic pollutants dissolved in water. A flow of He mixed with air was used to produce the dielectric barrier discharge (DBD), at the tip of the torch, using pulsed electric excitation at 12Â kV. The torch, operated at a power of 750Â mW/mm2, was seen to completely degrade the aqueous solutions of the pollutants namely methylene blue (MB), methyl orange (MO) and rhodamine-B (RB), at around 10â4Â M concentrations, the concentration of polluants is one order higher than of routinely used heterogeneous photocatalytic reactions, within 10Â min of irradiation time at room temperature. UV Visible spectra of the organic dye molecules, monitored after different intervals of plasma-irradiation, ranging between 1 and 10Â min, have been used as tools to quantify their sequential degradation. Further, instead of using He, only air was used to form plasma plume and used for degradation of organic dye which follow similar trend as that of He plasma. Further, Liquid Chromatography Mass Spectroscopy (LCMS) technique has been used to understand degradation pathway of methylene blue (MB) as a representative case. Total organic carbon (TOC) measurements indicates significant decrease in its content as a function of duration of plasma exposure onto methylene blue as a representative case. Toxicity studies were carried out onto Gram negative Escherichia coli. This indicated that methylene blue, without plasma treatment, shows growth inhibition, whereas with plasma treatment no inhibition was observed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 167, January 2017, Pages 396-405
Journal: Chemosphere - Volume 167, January 2017, Pages 396-405
نویسندگان
Avinash S. Bansode, Supriya E. More, Ejaz Ahmad Siddiqui, Shruti Satpute, Absar Ahmad, Sudha V. Bhoraskar, Vikas L. Mathe,