Nitrata pollution of groundwater arising from agricultural practices, and some technologies to conrol the polluion

农业生产引起的地下水硝酸盐污染以及控制污染的一些技术

• 批准号: 07458140
• 负责人: SUGIMOTO Yasuhiro
• 金额: $ 4.93万
• 依托单位: MIYAZAKI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07458140/
• 关键词: Nitrate-N; Nitrate pollution; Well-water; Groundwater; Animal waste; Chitosan; Adsorption of nitrate; Microcapsule; Co-polymerization

To clarify the nitrate pollution of groundwater in Miyakonozyo basin, nitrate-N content of some 800 of wall-water was measured for several years. Twelve% of total samples exceeded 10 ppm nitrate-N.Animal waste was considered to be one of main sources of nitrate-N in wall-water in this region.Removal and separation of nitrate anion were carried out using chitosan and chitosan derivatives. Among these, the chitosan derivatives having the secondary amine group showed the high selectivity for nitrate anion over chloride and sulfate anions. The chitosan derivative with the template of nitrate anion exhibited a high adsorption of nitrate anion at pH value around neutrality.Microcapsule containing nitrogen fertilizer as a core-material were prepared using stirene-di-vinylbenzene co-polymerization for various conditions, in which they control the release of the core-materials and have a ability of prevention of groundwater pollution. Shapes and diameters of the pore and the particle sizes were found to be controlled by the preparation conditions. The microcapsule containing 80% of core-materials was found to be prepared in the study.

为了弄清宫古野代盆地地下水的硝酸盐污染情况，连续几年对约800个壁水的硝态氮含量进行了测定。12%的样品中硝酸盐氮含量超过10ppm，动物粪便被认为是该地区墙体水中硝酸盐氮的主要来源之一，利用壳聚糖及其衍生物对硝酸盐阴离子进行去除和分离。其中，含仲胺基团的壳聚糖衍生物对硝酸根离子的选择性高于氯离子和硫酸盐阴离子。以硝酸根为模板的壳聚糖衍生物在pH值中性附近对硝酸根离子有较高的吸附能力。采用苯乙烯-二乙烯基苯共聚法制备了以氮肥为芯材的微胶囊，在不同条件下控制芯材的释放，并具有防止地下水污染的能力。孔的形状和直径以及颗粒大小都受制备条件的控制。本研究制备了芯材含量为80%的微胶囊。

项目成果

杉本安寛: "宮崎県内のA酪農経営における窒素フロー" システム農学会誌. 13(2). 82-90 (1997)

Yasuhiro Sugimoto：“宫崎县奶牛场管理中的氮流”，日本系统农业学会杂志 13(2) (1997)。

河野恵宣: "タンパク質を内包したW/O/Wエマルションの安定性と除放特性" 第24回機能材料と利用に関するフォーラム要旨集. 38-41 (1995)

Yoshinobu Kono：“含有蛋白质的 W/O/W 乳液的稳定性和持续释放特性”第 24 届功能材料与应用论坛摘要 38-41 (1995)。

杉本 安寛: "宮崎県内のA酪農経営における窒素フロー" システム農学会誌. 13(2). 82-90 (1997)

Yasuhiro Sugimoto：“宫崎县奶牛场管理中的氮流量”日本系统农业学会杂志 13(2) (1997)。

Y.Baba et al.: "Synthesis of a chitosan derivative recognizing planar metel ion and its selective adsorption equilibria of copper (II) over iron (III)." Reactive & Functional Polymers. 33. 1-6 (1997)

Y.Baba 等人：“识别平面金属离子的壳聚糖衍生物的合成及其铜 (II) 对铁 (III) 的选择性吸附平衡。”