Potassium Niobate Nanolamina: A Promising Adsorbent for Entrapment of Radioactive Cations from Water

Processing and managing radioactive waste is a great challenge worldwide as it is extremely difficult and costly; the radioactive species, cations or anions, leaked into the environment are a serious threat to the health of present and future generations. We report layered potassium niobate (K 4 Nb...

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Bibliographic Details
Published in:Scientific reports 2014-12, Vol.4 (1), p.7313
Main Authors: Sun, Jin, Yang, Dongjiang, Sun, Cuihua, Liu, Long, Yang, Shuanglei, (Alec) Jia, Yi, Cai, Rongsheng, Yao, Xiangdong
Format: Article
Language:English
Subjects:
639/301
704/172
Adsorbents
Adsorption
Anions
Cations
Cations - chemistry
conference-proceeding
Humanities and Social Sciences
Ion exchange
Kinetics
multidisciplinary
Niobium - chemistry
Oxides - chemistry
Potassium
Potassium - chemistry
Radioactive Waste - prevention & control
Radioactive wastes
Science
Waste Water - chemistry
Wastewater
Water Pollutants, Chemical - chemistry
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Summary:Processing and managing radioactive waste is a great challenge worldwide as it is extremely difficult and costly; the radioactive species, cations or anions, leaked into the environment are a serious threat to the health of present and future generations. We report layered potassium niobate (K 4 Nb 6 O 17 ) nanolamina as adsorbent to remove toxic Sr 2+ , Ba 2+ and Cs + cations from wastewater. The results show that K 4 Nb 6 O 17 nanolamina can permanently confine the toxic cations within the interlayer spacing via a considerable deformation of the metastable layered structure during the ion exchange process. At the same time, the nanolaminar adsorbent exhibits prompt adsorption kinetics, high adsorption capacity and selectivity and superior acid resistance. These merits make it be a promising material as ion exchanger for the removal of radioactive cations from wastewater.
ISSN:2045-2322
DOI:10.1038/srep07313