CAJ | 학술논문

利用分光光度法研究了硝酸铀酰水溶液的初始浓度和pH值这两个因素对铀酰离子（UO2＋2）水解反应的影响，同时考察了不同pH值条件下，UO2＋2与偶氮胂（Ⅲ）显色后的最大吸收波长。实验结果表明，当pH值为30．～70．时，偶氮胂（Ⅲ）显色后的最大吸收波长均为652 nm ；当硝酸铀酰溶液浓度相同、pH值在40．～60．时，高pH值环境中UO2＋2更易发生水解反应，pH值相同时，UO2＋2浓度越大越容易发生水解反应，得到了不同UO2＋2浓度溶液发生水解反应的最低pH值。在pH值为50．时进行吸附，UO2＋2浓度不能超过10．00×10－3 mol／L。
이용분광광도법연구료초산유선수용액적초시농도화pH치저량개인소대유선리자（UO2＋2）수해반응적영향，동시고찰료불동pH치조건하，UO2＋2여우담신（Ⅲ）현색후적최대흡수파장。실험결과표명，당pH치위30．～70．시，우담신（Ⅲ）현색후적최대흡수파장균위652 nm ；당초산유선용액농도상동、pH치재40．～60．시，고pH치배경중UO2＋2경역발생수해반응，pH치상동시，UO2＋2농도월대월용역발생수해반응，득도료불동UO2＋2농도용액발생수해반응적최저pH치。재pH치위50．시진행흡부，UO2＋2농도불능초과10．00×10－3 mol／L。
The effect of initial concentration and pH value of the uranyl nitrate solution on the uranyl ion (UO2+2 ) hydrolysis reaction was studied by spectrophotometry .The maximum absorption wavelength of the obtained complexes in the reaction of UO2+2 ions with arsenazo (Ⅲ) at different pH values was also investigated .The results show that the absorption wavelength is 652 nm in the range of pH 3 0.~7 0. .It is easier for the uranyl nitrate solution to hydrolysis at higher pH value than the lower in the range of pH 4 0.~6 0. at the same UO2+2 concentration .The uranyl solution at high concentration is prior to occurring hydrolysis reaction in the same pH value .Lowest pH values of various uranyl solutions were obtained for hydrolysis reaction . The results indicate that the concentration of uranyl solution should not exceed 1 0.00 × 10-3 mol/L at pH 5 0. .