کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7043460 | 1456912 | 2019 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Trichloronitromethane formation from amino acids by preozonation-chlorination: The effects of ozone dosage, reaction time, pH, and nitrite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The formation potentials of trichloronitromethane (TCNMFPs) of four natural amino acids (glycine, threonine, lysine and tryptophane) were investigated during chlorination and preozonation-chlorination. The effects of initial ozone dosage, reaction time, pH, and nitrite concentration on the TCNMFP of selected amino acid (AA) solutions were carried out in detail. During preozonation-chlorination, TCNMFPs of glycine- and lysine-containing solutions were more significant than that containing the other two AAs. Increasing the initial ozone concentration resulted in a considerable increase of TCNMFPs from glycine, lysine, and tryptophane. The concentration of trichloronitromethane (TCNM) of glycine, threonine, and lysine solutions increased during preozonation-chlorination with the ozonation time extended. The effect of pH on TCNMFPs of amino acid by preozonation was compound-specific. In addition, the presence of nitrite ions contributes greatly to TCNMFP for all four types of amino acids. However, as the concentration of NO2â increased to higher levels, there was no significant further enhancement of TCNMFP. For chlorination alone, TCNM formed in all four amino acid solutions, with tryptophane solution having the highest TCNMFP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 209, 31 January 2019, Pages 145-151
Journal: Separation and Purification Technology - Volume 209, 31 January 2019, Pages 145-151
نویسندگان
Yiran Zhang, Jinfeng Lu, Peng Yi, Yaozong Zhang, Qishan Wang,