Occurrence of Free Amino Acids in the Source Waters of Zhejiang Province, China, and Their Removal and Transformation in Drinking Water Systems

被引:9
|
作者
Yang, Yulong [1 ]
Yu, Qi [2 ]
Zhou, Ruonan [2 ]
Feng, Jiao [2 ]
Zhang, Kejia [1 ]
Li, Xueyan [3 ]
Ma, Xiaoyan [2 ]
Dietrich, Andrea M. [4 ]
机构
[1] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Peoples R China
[2] Zhejiang Univ Technol, Coll Civil Engn & Architecture, Hangzhou 310014, Peoples R China
[3] Suzhou Univ Sci & Technol, Sch Environm Sci & Engn, Suzhou 215009, Peoples R China
[4] Virginia Polytech Inst & State Univ, Civil & Environm Engn, Blacksburg, VA 24061 USA
基金
中国国家自然科学基金;
关键词
solid phase extraction; disinfection byproduct precursor; free amino acids; C-DBP; N-DPB; DISINFECTION BY-PRODUCTS; NITROGEN; CHLORINATION; PRECURSORS; DBPS; ACESULFAME; HYDROXYL; TYROSINE; THMS;
D O I
10.3390/w12010073
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Free amino acids (FAAs) are key components of the global nitrogen cycle and important disinfection byproduct (DBP) precursors. The knowledge gap of FAA occurrence in source and engineered water is discussed in this paper. Solid phase extraction and post column derivatization was combined with gas chromatography-mass spectrometry to simultaneously detect mu g/L concentrations of FAAs. This method efficiently detects alanine (Ala), threonine (Thr), serine (Ser), valine (Val), leucine (Leu), isoleucine (Ile), proline (Pro), aspartic (Asp), phenylalanine (Phe), and glutamic acid (Glu) with good linearity, accuracy, and precision. An investigation of FAAs in surface waters in Zhejiang Province found concentrations of 1.48-14.73 mu g/L Ala, 0.20-2.39 mu g/L Thr, 0.41-7.84 mu g/L Val, 0.21-6.86 mu g/L Ser, 0.11-4.16 mu g/L Leu, 0.57-1.54 mu g/L Ile, 0.24-8.06 mu g/L Pro, 0.42-4.73 mu g/L Asp, 0.30-3.01 mu g/L Phe, and 0.12-3.83 mu g/L Glu. Phe and tyrosine (Tyr) exhibited higher trichloromethane (TCM) formation (1029-1148 mu g/mmolAA) than dichloroacetonitrile (DCAN) formation (333-347 mu g/mmolAA). Asp and Glu demonstrated the opposite trend: higher DCAN (570-1106 mu g/mmolAA) formation than TCM (137-506 mu g/mmolAA).
引用
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页数:15
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