Speciation of prehydrolyzed Al salt coagulants with electrospray ionization time-of-flight mass spectrometry and 27Al NMR spectroscopy
Speciation of prehydrolyzed Al salt coagulants with electrospray ionization time-of-flight mass spectrometry and 27Al NMR spectroscopy
复制标题
使用电喷雾电离飞行时间质谱和 27Al NMR 光谱法对预水解铝盐混凝剂进行形态分析
DOI：
10.1016/j.colsurfa.2011.09.039
复制
发表时间：
2011-12
期刊：
影响因子：
--
通讯作者：
Chenghong Feng*, Shou Zhao, Zhe Bi, Dongsheng Wan
中科院分区：
文献类型：
--
作者：
Chenghong Feng*, Shou Zhao, Zhe Bi, Dongsheng Wan
基于最受关注的两种混凝剂组分（即单体和Keggin-Al13）的形态分析结果，结合电喷雾电离飞行时间质谱和27Al核磁共振波谱对聚合铝盐混凝剂中的Al形态进行了全面研究。 Keggin-Al137+可以通过脱氢反应转化为Al13n+(n=1-3)，而不破坏质谱仪中的Keggin结构。聚合铝混凝剂的质谱中Al13n+(n=1-3)物质的强度和观察到的序列存在差异。 Keggin-Al137+ 的分解和再聚合也可能形成其他几种聚合物（即 Al193+、Al203+ 和 Al16n+，n=1–3）。与单体铝盐混凝剂一样，低碱度聚合铝盐混凝剂中的物质在质谱中主要检测为单电荷低聚物。随着碱度的增加，优势物种往往转变为电荷更高、类别更少的高聚物。单体Al混凝剂中检测到的Al133+形态应具有八面体结构，是通过自水解形成的，这与纯化Al13混凝剂中检测到的形态不同。总体而言，质谱检测到的物质可以大致代表它们在原溶液中的溶解状态，也可以用来解释它们在水处理过程中混凝性能的差异。
Based on the speciation results of the most two concerned coagulant component (i.e., monomer and Keggin-Al13), Al species in polymeric Al salt coagulants were fully investigated with the combination of electrospray ionization time-of-flight mass spectrometry and27Al NMR spectroscopy. Keggin-Al137+could transform into Al13n+(n=1–3) by dehydrogen reaction without destroying the Keggin structure in mass spectrometer. There exist differences in the intensity and the observed sequence of the Al13n+(n=1–3) species in the mass spectra of polymeric Al coagulants. Several other polymers (i.e., Al193+, Al203+and Al16n+, n=1–3) might also be formed by the decomposition and repolymerization of Keggin-Al137+. Like monomeric Al salt coagulant, species in polymeric Al coagulants with low basicity were mainly detected as low polymers with mono-charge in mass spectrometry. With the increase of basicity, the dominant species often transform into high polymers with higher charges and fewer categories. The Al133+species detected in monomeric Al coagulant should have octahedral structure and be formed by self hydrolysis, which is different with the species detected in purified Al13coagulant. On the whole, the detected species in mass spectrometry could roughly represent their dissolution status in original solutions and could also be used to explain the difference of their coagulation performance in water treatment process.
登录
查看更多内容
影响因子：
11.4
作者：
PARKER, DR;BERTSCH, PM
通讯作者：
BERTSCH, PM
影响因子：
6
作者：
T. Urabe;T. Tsugoshi;Miho Tanaka
通讯作者：
T. Urabe;T. Tsugoshi;Miho Tanaka
DOI：
10.2136/sssaj1986.03615995005000030051x
发表时间：
1986-05
影响因子：
2.9
作者：
P. Bertsch;G. W. Thomas;R. Barnhisel
通讯作者：
P. Bertsch;G. W. Thomas;R. Barnhisel
DOI：
10.1016/j.colsurfa.2003.08.021
发表时间：
2003-12
期刊：
Coll. and Surf
影响因子：
--
作者：
Xu Yi;Wang D.S.;Liu Hong;Lu Yiqiang;Tang H.X
通讯作者：
Tang H.X
DOI：
10.1002/jms.1485
发表时间：
2009-02
期刊：
Journal of mass spectrometry : JMS
影响因子：
--
作者：
T. Urabe;T. Tsugoshi;Miho Tanaka
通讯作者：
T. Urabe;T. Tsugoshi;Miho Tanaka