微生物产物对粘土矿物中铯洗脱行为的影响。
EFFECT ON MICROBIAL PRODUCTS ON CAESIUM ELUTION BEHAVIOUR FROM CLAY MINERALS.
作者信息
Kimura T, Fukutani S, Yamaji K, Ikegami M, Yoneda M
机构信息
Departament of Environmental Engineering, Kyoto University, Nishigyo-ku Kyotodaigaku-katsura, Kyoto-shi, Kyoto, Japan.
Institute for Integrated Radiation and Nuclear Science, Kyoto university, Asashironishi 2, Kumatori-cho, Sennan-gun, Osaka, Japan.
出版信息
Radiat Prot Dosimetry. 2019 Oct 1;184(3-4):385-387. doi: 10.1093/rpd/ncz080.
Some microorganisms in the environment make siderophores, which are low molecular chelators, to take up minerals from soil. Eleven bacteria were separated from the root of white clover by chlome azrol S (CAS) assay. Each bacterium was incubated in casamino acid (CAA) culture, and siderophores in CAA culture were purified. These extractions were applied to biotite or vermiculite spiked with Cs. From each clay mineral, 57.1-72.8% (5100 ppm), 55.6-63.8% (920 ppm) and 48.6-54.3% (2300 ppm), 31.6-34.4% (520 ppm) was eluted, respectively. To understand elution behaviour, Cs desorption ratio of each clay was measured every 30 min. The results indicate Cs elution was occurred quickly.
环境中的一些微生物会产生铁载体（一种低分子螯合剂），以便从土壤中获取矿物质。通过铬天青S（CAS）测定法从白三叶草的根部分离出了11种细菌。每种细菌在酪蛋白氨基酸（CAA）培养基中培养，然后对CAA培养基中的铁载体进行纯化。将这些提取物应用于添加了铯的黑云母或蛭石。从每种粘土矿物中分别洗脱了57.1 - 72.8%（5100 ppm）、55.6 - 63.8%（920 ppm）和48.6 - 54.3%（2300 ppm）、31.6 - 34.4%（520 ppm）。为了解洗脱行为，每隔30分钟测量每种粘土的铯解吸率。结果表明铯的洗脱很快发生。
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