六亚甲基四胺浸渍活性炭捕集甲基碘

最常用的吸碘用浸渍剂三乙烯二胺（TEDA）存在着蒸汽压高、闪点低等缺点，使得TEDA浸渍炭仅能在390K下使用，而六亚甲基四胺（HMTA）具有高闪点和低挥发性的优点，可作为TEDA的替代材料。在27℃、相对湿度介于95%～96.5%的条件下，测试了HMTA浸渍活性炭富集碘过程中几项参数的影响。结果表明：对于本实验所使用的煤质活性炭，w=5%的HMTA浸渍量和30min的烘干时间是最适宜的，pH值的降低以及活性炭与空气接触则会降低吸附效率。本工作为进一步研究HMTA作为除碘用浸渍剂提供了实验依据。

Activated Carbon Impregnated by Hexamethylene Tetramine for Localization of CH3I

Triethylene diamine （TEDA）-a widely used impregnant for localization of iodine, possesses a few drawbacks, such as high steam pressure and low flash point, which restricts that activated carbon (AC) impregnated by TEDA can be only used below 390 K. Hexamethylene tetramine （HMTA） could be a substitute for TEDA because of its high flash point and low volatility. The impacts of a few parameters in the process of locating iodine by AC containing HMTA at 27℃ and 95%-96.5%(RH%) were tested. It is shown that appropriate quantity of impregnant （5%）and drying time （30min） can improve the adsorption efficiency, whereas the decrease of pH and exposure to air of AC play the negative role. These preliminary results provide some experimental basis for further study of HMTA as impregnant for location of radioactive iodine.