کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
580791 | 1453156 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal-pressure-mediated hydrolysis of Reactive Blue 19 dye
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Thermal-pressure-mediated hydrolysis of Reactive Blue 19 dye Thermal-pressure-mediated hydrolysis of Reactive Blue 19 dye](/preview/png/580791.png)
چکیده انگلیسی
The thermal-pressure-mediated hydrolysis rates and the degradation kinetics of environmentally persistent Reactive Blue (RB) 19 dye were studied. The dye decomposition was studied at 40-120 °C, pH 2-10, and atmospheric pressure range of 1-2 atm. The intermediates and end products formed during the degradation were identified using gas chromatography/mass spectrometry and a possible degradation pathway of RB 19 was proposed. The stability of the dye in aqueous solution was influenced by changes in pH. At pH 4, half-life was 2247.5 min at 40 °C and it reduced to 339.4 min when the temperature was increased to 120 °C. Acidic conditions were more conducive to enhance hydrolysis rate than basic ones as the decomposition was optimum at pH 4. The kinetic studies indicated that the rate of hydrolysis apparently followed first order reaction. A linear relationship was observed between hydrolysis rate of RB 19 dye and increasing temperatures and pressures. Overall, 23% dye decomposition occurred in 120 minutes at pH 4, 120 °C and pressure of 2 atm. Along with thermal-pressure, a combination of techniques like physico-chemical, biological, enzymatic etc. may be more suitable choice for the effective treatment of RB19 dye.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 172, Issues 2â3, 30 December 2009, Pages 1007-1012
Journal: Journal of Hazardous Materials - Volume 172, Issues 2â3, 30 December 2009, Pages 1007-1012
نویسندگان
Maria Siddique, Robina Farooq, Abda Khalid, Ather Farooq, Qaisar Mahmood, Umar Farooq, Iftikhar Ahmad Raja, Saleem Farooq Shaukat,