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Geoenvironmental improvement techniques using effective microorganisms

使用有效微生物的地球环境改善技术

基本信息

批准号：
21360227
负责人：
OMINE Kiyoshi
金额：
$ 10.65万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2011
项目状态：
已结题

项目摘要

A fundamental study on the effect of mixing microorganisms for Cr(VI) contaminated water and soil was investigated by laboratory method. Moreover, reduction effects in the leaching of Cr(VI) from fly ash by mixing selected microorganisms were confirmed in consideration of species and amount of microorganisms.Boron is an industrially important element having properties between metals and non-metals. Boron is often cited as the most phytotoxic trace nutrient in coal fly ash, because of its high concentration and solubility relative to other trace elements in coal fly ash. The removal of boron from contaminated water, fly ash is an important environmental concern. The samples were collected from fly ash dumping site in Japan. From the screening, seventeen isolates identified, characterized based on biochemical and 16S rDNA sequencing analysis were most closely related to the genera Bacillus, Lysinibacillus, Microbacterium, and Ralstonia. The bacterial isolates exhibited high boron tolerance ranged from 60-260 mM in solid media. To our knowledge, this is the first study examining a wide range of bacterial strains in terms of boron tolerant, removal(biosorption based) and accumulation from fly ash dumping site.A geo-environmental approach has been carried out for the restoration of the farmed land which was damaged by the saline water due to tsunami water in the pacific coast of Tohoku region in Japan. In this study, major chemical properties(pH, Electrical conductivity) of soil in Rikuzentakata city(one of the most affected areas due to tsunami) have been carried out in the field test during May and June, 2011. An innovative approach has been taken to restore the saline soil by using compost containing Halo bacteria in this area.

采用实验室方法研究了混合微生物对Cr(VI)污染水体和土壤的影响。此外，考虑到微生物的种类和数量，通过混合选定的微生物，证实了从飞灰中浸出Cr(VI)的减少效果。硼是具有金属和非金属之间性质的工业上重要的元素。硼通常被认为是粉煤灰中最具植物毒性的微量营养素，因为相对于粉煤灰中的其他微量元素，硼的浓度和溶解度较高。从污染水、飞灰中去除硼是一个重要的环境问题。样品是从日本的飞灰倾倒场采集的。通过筛选，根据生化和 16S rDNA 测序分析鉴定并鉴定了 17 个分离株，它们与芽孢杆菌属、赖氨酸芽孢杆菌属、微杆菌属和罗尔斯通氏菌属关系最密切。细菌分离株在固体培养基中表现出高硼耐受性，范围为 60-260 mM。据我们所知，这是第一项对粉煤灰倾倒场的硼耐受性、去除（基于生物吸附）和积累的细菌菌株进行广泛研究的研究。为恢复日本东北地区太平洋沿岸因海啸造成的咸水损坏的耕地，采取了一种地质环境方法。本研究于2011年5月至6月对陆前高田市（受海啸影响最严重的地区之一）土壤的主要化学性质（pH值、电导率）进行了现场测试。采用了一种创新方法，利用含有Halo细菌的堆肥来恢复该地区的盐渍土。