Effect of low molecular weight lignin fragments including oxalic acid in alkaline-oxygen stage waste liquor on Al toxicity
Effect of low molecular weight lignin fragments including oxalic acid in alkaline-oxygen stage waste liquor on Al toxicity
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DOI：
10.1007/s10086-005-0703-1
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发表时间：
2005-12
影响因子：
2.9
通讯作者：
Dongxian Wang;K. S. Katsumata;G. Meshitsuka
中科院分区：
文献类型：
--
作者：
Dongxian Wang;K. S. Katsumata;G. Meshitsuka
我们之前的研究表明，通过光谱分析，碱氧阶段废液的分离组分（F1 至 F4）中存在一些低分子量污染物。在本研究中，这些化合物的数量通过毛细管电泳（CE）测定。 F3 中发现了大量的草酸盐和乙酸盐。 Al与草酸盐以及F3之间的配合物通过27Al-核磁共振(NMR)光谱进行了表征，草酸铝配合物的光谱证明了草酸盐螯合Al并在不同摩尔比下产生不同形式的配合物的能力。草酸铝配合物存在下的植物生长实验表明，在适当的范围内，草酸对铝毒的解毒有良好的作用。可以推测，F3中的草酸盐对于有效去除Al毒性也起着重要作用。27Al-NMR被证明是研究Al与有机化合物之间的配合物而不扰乱其平衡条件的有用方法。
Our previous study indicated the existence of some low molecular weight contaminants in separated fractions (F1 to F4) of alkaline-oxygen stage waste liquor by spectroscopic analysis. In the present study, the quantities of these compounds were determined by capillary electropheresis (CE). Substantial amounts of oxalate and acetate were found in F3. The complexes between Al and oxalate as well as F3 were characterized by27Al-nuclear magnetic resonance (NMR) spectroscopy, and the spectra of Al-oxalate complexes demonstrated the ability of oxalate to chelate Al and to produce different forms of complexes at varied molar ratios. Plant growth experiments in the presence of Al-oxalate complexes suggested that at a proper range, oxalate has a favorable effect on the detoxification of Al toxicity. It can be assumed that oxalate in F3 also plays an important role in the efficiency of removing Al toxicity.27Al-NMR was proved to be a useful method for the study of complexes between Al and organic compounds without disturbing their equilibrium conditions.