Pertechnetate removal from aqueous solution using activated carbon modified with oxidizing and reducing agents

作者：Park Jai Il; Cho Hye Ryun; Choi Kwang Soon; Park Kyoung Kyun; Park Yeong Jae^*

来源：Journal of Radioanalytical and Nuclear Chemistry, 2018, 316(3): 1281-1288.

DOI：10.1007/s10967-018-5769-5

• Modified activated carbon
• Pertechnetate adsorption
• Surface functional group
• FT-IR spectrum
• Boehm titration
• Adsorption mechanism

The adsorption mechanism of pertechnetate on activated carbon (AC) has been studied. For this work, the surface of commercial AC was modified using various oxidizing and reducing agents. The changes of surface functional groups were monitored by FT-IR spectroscopy and Boehm titration. The distribution coefficient (K (d)) of TcO4 (-) on the modified AC has been determined. In acidic media, the value of K (d) slightly increased owing to the reductive treatment of ACs, whereas a large decrease in K (d) was observed in case of oxidative treatment of ACs. Based on this work, the previous adsorption mechanisms for TcO4 (-) on AC were examined. As an alternative adsorption mechanism, the adsorption by electrostatic attraction between TcO4 (-) and protonated basic sites on AC surface was proposed.

• 出版日期2018-6