期刊
NUCLEAR ENGINEERING AND TECHNOLOGY
卷 51, 期 3, 页码 738-745出版社
KOREAN NUCLEAR SOC
DOI: 10.1016/j.net.2018.11.016
关键词
Radioactive wastewater; Coagulation; Flocculation; Coprecipitation; HFO; PAM; Fukushima
资金
- National Research Foundation of Korea - Korea government (MSIP) [NRF-2017M2A8A5015147]
- National Research Foundation of Korea [2017M2A8A5015147] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Coprecipitation using hydrous ferric oxide (HFO) has been effectively used for the removal of radionuclides from radioactive wastewater. This work studied the dynamic behavior of HFO floc formation during the neutralization of acidic ferric iron in the presence of several radionuclides by using a photometric dispersion analyzer (PDA). Then the coagulation-flocculation system using HFO-anionic poly acrylamide (PAM) composite floc system was evaluated and compared in seawater and distilled water to find the effective condition to remove the target nuclides (Co-60, Mn-54, Sb-125, and Ru-106) present in wastewater generated in the severe accident of nuclear power plant like Fukushima Daiichi case. A ferric iron dosage of 10 ppm for the formation of HFO was suitable in terms of fast formation of HFO flocs without induction time, and maximum total removal yield of radioactivity from the wastewater. The settling time of HFO flocs was reduced by changing them to HFO-PAM composite floc. The optimal dosage of anionic PAM for HFO-anionic PAM floc system was approximately 1e10 ppm. The total removal yield of Mn-54, Co-60, Sb-125, Ru-106 radionuclides by the HFO-anionic PAM coagulationflocculation system was higher in distilled water than in seawater and was more than 99%. (c) 2018 Korean Nuclear Society, Published by Elsevier Korea LLC.
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