原子能科学技术
原子能科學技術
원자능과학기술
ATOMIC ENERGY SCIENCE AND TECHNOLOGY
2014年
10期
1751-1756
,共6页
卿云花%康斌%戴耀东%李俊%沈舞婷
卿雲花%康斌%戴耀東%李俊%瀋舞婷
경운화%강빈%대요동%리준%침무정
亚铁氰化镍%铯离子%放射性废水%吸附
亞鐵氰化鎳%銫離子%放射性廢水%吸附
아철청화얼%색리자%방사성폐수%흡부
nickel hexacyanoferrate%cesium ion%radioactive wastewater%adsorption
亚铁氰化镍(KNiFC )配合物常用于对放射性废水中铯、锶等放射性离子的吸附。本文以Ni(NO3)2和K4 Fe(CN)6为原料通过共沉淀法制备KNiFC配合物,将配合物与CsCl溶液按一定比例混合以吸附溶液中的Cs+,通过TEM、原子吸收分光光度计、XRF、XRD、穆斯堡尔谱等手段对KNiFC吸附Cs+前后的形貌、结构、吸附化学计量学及各元素的摩尔比进行表征来探讨KNiFC对Cs+的吸附机制。结果表明:KNiFC具有粒径约为15~20 nm的椭球形特征,且溶液中的Cs+主要通过与KNiFC中的K+交换而达到吸附效果;吸附后,KNiFC晶体结构发生了较大变化,但依旧保持了良好的对称性。
亞鐵氰化鎳(KNiFC )配閤物常用于對放射性廢水中銫、鍶等放射性離子的吸附。本文以Ni(NO3)2和K4 Fe(CN)6為原料通過共沉澱法製備KNiFC配閤物,將配閤物與CsCl溶液按一定比例混閤以吸附溶液中的Cs+,通過TEM、原子吸收分光光度計、XRF、XRD、穆斯堡爾譜等手段對KNiFC吸附Cs+前後的形貌、結構、吸附化學計量學及各元素的摩爾比進行錶徵來探討KNiFC對Cs+的吸附機製。結果錶明:KNiFC具有粒徑約為15~20 nm的橢毬形特徵,且溶液中的Cs+主要通過與KNiFC中的K+交換而達到吸附效果;吸附後,KNiFC晶體結構髮生瞭較大變化,但依舊保持瞭良好的對稱性。
아철청화얼(KNiFC )배합물상용우대방사성폐수중색、송등방사성리자적흡부。본문이Ni(NO3)2화K4 Fe(CN)6위원료통과공침정법제비KNiFC배합물,장배합물여CsCl용액안일정비례혼합이흡부용액중적Cs+,통과TEM、원자흡수분광광도계、XRF、XRD、목사보이보등수단대KNiFC흡부Cs+전후적형모、결구、흡부화학계량학급각원소적마이비진행표정래탐토KNiFC대Cs+적흡부궤제。결과표명:KNiFC구유립경약위15~20 nm적타구형특정,차용액중적Cs+주요통과여KNiFC중적K+교환이체도흡부효과;흡부후,KNiFC정체결구발생료교대변화,단의구보지료량호적대칭성。
The nickel hexacyanoferrate (KNiFC) compound is often applied for the ion adsorption of cesium and strontium in low-level radioactive wastewater treatment .In this work , the co-precipitate method was used for the preparation of KNiFC using K4 Fe(CN)6 and Ni(NO3 )2 as raw materials .Then this compound was added into the aqueous solution of CsCl with a certain molar ratio .The mixture was shaken with an oscillator for completely adsorbing cesium ions in KNiFC .The morphology ,structure , adsorption stoichiometry and molar ratio of KNiFC before and after cesium ion adsorp-tion were analyzed with transmission electron microscope (TEM ) ,atomic adsorption spectrophotometer (AAS ) ,X-ray diffraction (XRD ) ,X-ray fluorescence (XRF ) and Mossbauer spectrum .The results indicate that the obtained KNiFC has a 15-20 nm crys-tal size and ellipsoidal shape .Cs+ is adsorbed mainly by exchanging with the K + in KNiFC .The phase structure of KNiFC is obviously changed after adsorption ,but still maintains a good symmetry .