Reductive Immobilization of Rhenium in Soil and Gr

Authors: Qingwei Ding Feng Ding Tianwei Qian Dongye Zhao Lixiao Wang

Publish Date: 2015/11/12

Volume: 226, Issue: 12, Pages: 409-

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Abstract

This study reports a method for preparation of pyrite nanoparticles and experimental results of reductive removal of perrhenate a surrogate for radioactive pertechnetate from water using the nanoparticles The pyrite nanoparticles were prepared by ball milling in ethanol Batch kinetic tests and column tests indicated that the pyrite nanoparticles were able to rapidly reduce and remove perrhenate at ambient temperatures The pyrite nanoparticles were characterized using XRD and SEM The effects of particle size and pH on the immobilization of perrhenate were studied in batch experiments with pyrite particles of different sizes 20 μm and 100 nm and under different initial pH conditions 35 66 and 12 To probe the potential of the nanoparticles for in situ immobilization of perrhenate in soil column tests were carried out where the pyrite nanoparticles were packed in the column to simulate a permeable reactive barrier The column tests showed that the pyrite nanoparticles reduced the water leachable ReO4 − by 44  The results revealed great potential of pyrite nanoparticles for possible reductive immobilization of pertechnetate and other redoxsensitive metals and radionuclides in soil and groundwaterThe authors would gratefully acknowledge the partial financial supports from the following sources the National Natural Science Foundation of China No 41072265 and No 41230638 International Cooperation Program of Shanxi Province 2010081021 Shanxi Scholarship Council of China No 2013key 2 the Science and Technology Key Program of Shanxi Province No 20131101028 the Doctoral Program of Higher Education of Shanxi Province No 20101415110003 Students Innovative and Pioneering Program of Shanxi province No 120164075 and the Auburn University IGP program

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