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首页> 外文期刊>Fibre Chemistry >CO-PRECIPITATION OF RADIONUCLIDES BY WATER-SOLUBLE MELANIN FROM THE CHITIN—MELANIN GLUCAN COMPLEX 'MIKOTON' IN SOLUTIONS
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CO-PRECIPITATION OF RADIONUCLIDES BY WATER-SOLUBLE MELANIN FROM THE CHITIN—MELANIN GLUCAN COMPLEX 'MIKOTON' IN SOLUTIONS

机译：几丁质-黑色素葡糖复合物“米克顿”中水溶性黑色素共同沉淀放射性核素

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摘要

Co-precipitation of ~(233)UO_2~(2+),~(153)Eu~(3+), and ~(90)Sr~(2+) on melanin isolated from the preparation Mikoton, a chitin—melanin glucan complex, was studied in solutions. It was shown that the degree of co-precipitation (a) of the radionuclides depended on the solution content of polymer. The maximum value of a was at least 80% for metal-ion concentration 250 mg/L and 0.8% melanin. It was hypothesized that UO_2~(2+), Eu~(3+), and Sr~(2+) were bound mainly by carboxylic and phenolic groups of melanin. The developed co-precipitation process could be recommended for isolation and concentration of radionuclides from low-salt process solutions and natural media.
机译：〜（233）UO_2〜（2 +），〜（153）Eu〜（3+）和〜（90）Sr〜（2+）在从甲壳素-黑色素葡聚糖葡聚糖中分离出的黑色素上共沉淀复杂，在解决方案中进行了研究。结果表明，放射性核素的共沉淀度（a）取决于聚合物的溶液含量。对于250 mg / L的金属离子浓度和0.8％的黑色素，a的最大值至少为80％。假设UO_2〜（2 +），Eu〜（3+）和Sr〜（2+）主要被黑色素的羧基和酚基键合。可以建议使用发达的共沉淀工艺从低盐工艺溶液和天然介质中分离和浓缩放射性核素。

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