Abstract：
:In this study, the effects of pH, bromide and nitrite on the formation of halonitromethanes (HNMs) and trihalomethanes (THMs) from eight amino acids (glycine, alanine, serine, cysteine, aspartic acid, glutamic acid, lysine and histidine) and four amino sugars (glucosamine, galactosamine, N-acetylglucosamine and N-acetylneuraminic acid) were examined for chlorination and ozonation followed by chlorination. During ozonation-chlorination, two amino acids, glycine and lysine, exhibited distinctly higher HNM formation than the other compounds. The formation of HNMs was higher at pH 8 than 6. Glycine and lysine also produced higher levels of THMs than the other compounds at pH 8. The presence of nitrite resulted in an increase in HNM formation. The presence of bromide increased the HNM formation, especially brominated HNM species. Bromine incorporation factors of trihalogenated HNMs were higher than those of THMs. For chlorination alone, HNM levels were about the detection limit (4 nM or 0.7 μg L(-1)) at pH 6 and 8, and in the presence of bromide or nitrite. Amino acids and amino sugars tested, except glycine and lysine, showed relatively low levels of THM (~15 μg L(-1)) formation.
journal_name
Chemospherejournal_title
Chemosphereauthors
Shan J,Hu J,Kaplan-Bekaroglu SS,Song H,Karanfil Tdoi
10.1016/j.chemosphere.2011.09.004subject
Has Abstractpub_date
2012-01-01 00:00:00pages
323-8issue
4eissn
0045-6535issn
1879-1298pii
S0045-6535(11)01036-8journal_volume
86pub_type
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