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Collection and identification of bioactive organic compounds occurring in natural water

天然水中存在的生物活性有机化合物的收集和鉴定

基本信息

批准号：
15550069
负责人：
HORI Toshitaka
金额：
$ 2.43万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15550069/
关键词：
Layered Double Hydroxide Bioactive Organic Compounds Monosaccharide Organophosphorus Compound Carboxylic Acid Hydrated Iron Oxide Dissolved Organic Carbon Silica Gel 層状複水酸化物 LDH ラングミュア等温吸着選択的吸着リボースグルコースリン酸天然水吸着海水

项目摘要

To develop adsorption collection methods applicable to. bioactive organic compounds occurring and circulating in natural waters, usefulness of hydrous iron oxide (HIO) and its analogous materials as an adsorbent was examined. The outlines and results of the research are as follows. (1)At first, 34 kinds of carboxylic acid and its derivatives were selected as an example of bioactive organic compounds and were tested to be adsorbed onto HIO or not. As the results, those molecules which have more than two HOOC-residues are adsorbed quantitatively onto HIO from solutions with pH 4.0〜5.5. The presence of a HO-residue along with the HOOC-residue facilitated the adsorption, but that of a CI-residue suppressed the adsorption. The effect of the HO- or CI-residue was enhanced when it was located adjacent to the HOOC-residue in the molecule. (2)Similarly, the adsorption behaviors of orthophosphate, tripolyphosphate, pyrophosphate, monomethylphosphate, phosphite, α-and β-glycerophosphates, dimethy … More lphospahte, and hypophosphate on HIO was studied. Orthophosphate was adsorbed quantitatively at pH 4.0〜6.8, triphosphate and pyrophosphate at pH 4〜9.3 and the next three compounds at pH 4〜6.8. The last two compounds were only slightly adsorbed at any pH examined. Then, it was concluded that at least two free P-O terminals in each phosphorus compound are necessary for the adsorption and that the more the P-O terminals, the stronger the adsorption. (3)A selection of sugars including seventeen monosaccharides and sucrose were adsorbed on HIO and hydrous zirconium oxide (HZO) and their strengths of adsorption were compared according to the Langmuir adsorption isotherm. The adsorption selectivity which was observed as the Langmuir constants of "a" and "W" was correlated to the configuration of HO-residues (evaluated as the R value) on each sugar molecule. (4)A silica gel collector modified with HIO was prepared for preconcentrating extremely dilute phosphate and was applied to the determination of orthophosphate-phosphorus at a level of several nM contained in lake and sea water samples. (5)Adsorption of dissolved organic carbon (DOC) onto HIO was also examined as a function of pH. Less

开发适用于。研究了天然水体中存在和循环的生物活性有机化合物，水合氧化铁（HIO）及其类似材料作为吸附剂的有效性。本文的研究大纲和结果如下：(1)首先选取34种羧酸及其衍生物作为生物活性有机化合物，测试其是否吸附在HIO上。结果表明，在pH为4.0 ~ 5.5的溶液中，具有两个以上hooc残基的分子被定量地吸附在HIO上。ho -残基和hooc -残基的存在促进了吸附，ci -残基的存在抑制了吸附。当HO-或ci -残基位于分子中hooc -残基附近时，其作用增强。(2)同样，研究了正磷酸盐、三聚磷酸盐、焦磷酸盐、一甲基磷酸盐、亚磷酸酯、α和β-甘油磷酸盐、二甲基、多磷酸酯和次磷酸酯在HIO上的吸附行为。pH为4.0 ~ 6.8时定量吸附正磷酸盐，pH为4 ~ 9.3时定量吸附三磷酸盐和焦磷酸盐，pH为4 ~ 6.8时定量吸附三种化合物。最后两种化合物在任何pH值下都只被轻微吸附。结果表明，每一种磷化合物中至少需要两个游离的磷- o末端，且磷- o末端越多，吸附力越强。(3)选取17种单糖和蔗糖分别吸附在HIO和含水氧化锆（HZO）上，并根据Langmuir吸附等温线对其吸附强度进行比较。通过Langmuir常数“a”和“W”观察到的吸附选择性与每个糖分子上ho -残基的构型（以R值表示）相关。(4)制备了一种经HIO修饰的硅胶捕收剂，用于预富集极稀磷酸盐，并应用于湖泊和海水样品中数nM水平的正磷酸盐-磷的测定。(5)考察了ph值对HIO吸附溶解有机碳（DOC）的影响