کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7043453 | 1456912 | 2019 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Degradation of isopropyl alcohol using UV and persulfate in a large reactor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Degradation of isopropyl alcohol using UV and persulfate in a large reactor Degradation of isopropyl alcohol using UV and persulfate in a large reactor](/preview/png/7043453.png)
چکیده انگلیسی
This investigation concerns the degradation of isopropyl alcohol (IPA) in aqueous solutions using UV and persulfate (PS) in a large reactor, as well as the effects of PS concentration, initial IPA concentration, pH, and added anions on this process. A higher PS concentration was associated with more efficient degradation of IPA. However, an excessive PS concentration limited the degradation of IPA. Moreover, the efficiency of degradation of IPA increased with decreasing initial IPA concentration. SO4â was identified by performing quenching studies using specific alcohols. The results thus obtained reveal that SO4â was the predominant radical in the UV/PS process at pH 7. The degradation of IPA by the UV/PS process in a large reactor exhibited pseudo-first-order kinetics. The efficiency of degradation of IPA followed the order pH 7â¯>â¯pH 4â¯>â¯pH 10. Anions (Clâ, CO32-, and HCO3-) inhibited the degradation of IPA and their inhibitive effects followed the order Clââ¯>â¯CO32-â¯>â¯HCO3-. At pH 7, a PS concentration of 2.10â¯g/L, and an initial IPA concentration of 100â¯mg/L, 100% of IPA was degraded in the absence of anions with an observed degradation rate constant of 0.1890â¯minâ1, as measured after 20â¯min. Comparison with the heat/PS process demonstrates that the degradation of IPA was improved by the UV/PS process at a low temperature. Accordingly, the proposed method that is based on the UV/PS process is an effective method for degrading IPA in aqueous solutions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 209, 31 January 2019, Pages 88-93
Journal: Separation and Purification Technology - Volume 209, 31 January 2019, Pages 88-93
نویسندگان
Chia-Chang Lin, Chi-Wei Tsai,