Separation and Characterization of Aquatic Humic Substances

水生腐殖质的分离和表征

• 批准号: 05640679
• 负责人: HIRAIDE Masataka
• 金额: $ 1.22万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05640679/
• 关键词: Humic acid; Fulvic acid; Coprecipitation-flotation; Adsorption; Humic complexes; Water analysis

Humic and fulvic acids are the major organic constituents in natural waters. They interact with various toxic metal ions to form negatively charged humic complexes. The change of chemical forms often ffects on their geochemical behavior and biological effects. The humic substances are also known to be precursors of trihalomethanes formed during water treatment with chlorine. Therefore, the characterization of humic substances has been a topic of increasing research interest in geochemistry, environmental sciences and water treatment.In the present work, the following main topics were studied in detail : (1) concentration of humic substances in large aqueous samples by continuous-flow coprecipitation-flotation, (2) determination of humic complexes in water by ICP-mass spectrometry after adsorption on indium-treated XAD-2 resin and DEAE-Sephadex A-25 anion exchanger, and (3) separation and determination of dissolved and particulate humic and fulvic acids in water. Further, it was found that anionic surfactants were very effective for the desorption of humic substances from XAD resins. The decomposition of copper (II) -humic complexes in salt water was also evaluated.

腐殖酸和富里酸是天然沃茨中的主要有机成分。它们与各种有毒金属离子相互作用，形成带负电荷的腐殖酸络合物。化学形态的变化往往影响其地球化学行为和生物效应。腐殖物质也被认为是在用氯处理水的过程中形成的三卤甲烷的前体。因此，腐殖物质的表征一直是地球化学、环境科学和水处理领域越来越感兴趣的研究课题。（1）连续流共沉淀-浮选富集大水样中的腐殖物质，（2）用铟处理的XAD-2树脂和DEAE-Sephadex A-25阴离子交换剂吸附后，用电感耦合等离子体质谱法测定水中的腐殖酸复合物，（3）水中溶解态和颗粒态腐殖酸和富里酸的分离与测定。此外，还发现阴离子表面活性剂对腐殖物质从XAD树脂上的解吸非常有效。铜（II）-腐殖酸配合物在盐水中的分解也进行了评价。

项目成果

Masataka HIRAIDE: "Coprecipitation with Metal Hydroxides for the Determination of Beryllium in Seawater by Atomic Absorption Spectrometry" Mikrochimica Acta. 117. 7-13 (1994)

Masataka HIRAIDE：“通过原子吸收光谱法与金属氢氧化物共沉淀测定海水中的铍”Mikrochimica Acta。

Masataka HIRAIDE: "Sorption of Sodium Dodecyl Sulfate on Amberlite XAD-2 Resin" Analytical Sciences. 10. 505-507 (1994)

Masataka HIRAIDE：“十二烷基硫酸钠在 Amberlite XAD-2 树脂上的吸附”分析科学。

Masataka HIRAIDE: "Evaluation of Humic Complexes of Trace Metals in River Water by Adsorption on XAD-2 Resin and A-25 Anion Exchanger" Fresenius'Journal of Analytical Chemistry. 348. 758-761 (1994)

Masataka HIRAIDE：“通过 XAD-2 树脂和 A-25 阴离子交换剂吸附来评估河水中痕量金属的腐殖复合物”费森尤斯分析化学杂志。

Masataka HIRAIDE: "Immobilization of Dithizone on Surfactant-Coated Alumina for Preconcentration of Metal Ions" Analytical Sciences. 10. 125-127 (1994)

Masataka HIRAIDE：“将双硫腙固定在表面活性剂涂层的氧化铝上以预浓缩金属离子”分析科学。

Masataka HIRAIDE: "Dissociation of Copper(II)-Humic Acid Complexes in Salt Water" Analytical Sciences. 10. 659-661 (1994)

Masataka HIRAIDE：“铜（II）-腐植酸复合物在盐水中的解离”分析科学。