The fine crystals of ammonium tungstophosphate (AWP) exchager were immobilized in the biopolymer consisting of calcium alginate (CaALG) gels.The uptake rate of Cs~+ for the AWP-CaALG composite was fairly fast and the uptake percentage of Cs~+ was above 90% within 30 min even in the presence of 5 M HNO_3.In a wide HNO_3 concentration region of 0.1-5 M,the distribution coefficient of Cs~+ for the composite was about 10~4 cm~3/g,while those for other nuclides,Na~+,Sr~(2+),Co~(2+),Eu~(3+) adsorption equation,and the maximu uptake capacity of Cs~+ increased with the content of AWP immobilized in the composite.The trace amounts of ~(137)Cs in the presence of 5 MNaNO_3-1 M HNO_3 were selectively adsorbed on the composite column.The AWP-CaALG composite proved to be effective for the selective removal of radioactive cesium from waste solutions containing HNO_3 and NaNO_3.
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机译：钨酸磷酸铵（AWP）交换分子的微晶被固定在由藻酸钙（CaALG）凝胶组成的生物聚合物中，AWP-CaALG复合材料的Cs〜+吸收速率相当快，Cs〜+的吸收百分比高于即使在5 M HNO_3存在的情况下，在30分钟内仍可达到90％。在0.1-5 M的HNO_3宽浓度范围内，复合材料的Cs〜+分布系数约为10〜4 cm〜3 / g，其他原子核素，Na〜+，Sr〜（2 +），Co〜（2 +），Eu〜（3+）吸附方程以及Cs〜+的最大吸收量随固定化复合物中AWP含量的增加而增加。在5 MNaNO_3-1 M HNO_3存在下选择性地吸附了痕量〜（137）Cs.AWP-CaALG复合物被证明对于从HNO_3和NaNO_3的废液中选择性去除放射性铯是有效的。
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