Estimation of groundwater treatment using radiation-induced graft polymerization adsorbents at the Mizunami Underground Research Laboratory; Annual report on 2006 fiscal year (Joint research)

Iyatomi, Yosuke; Ogata, Nobuhisa; Sugihara, Kozo; Seko, Noriaki; Hoshina, Hiroyuki; Okada, Kenji*; Tamada, Masao

JAEA-Technology 2008-056, 12 Pages, 2008/08

JAEA-Technology-2008-056.pdf:1.24MB

The concentrations of fluorine (7.29.5 mg/L) and boron (0.81.5 mg/L) dissolved in groundwater pumped from shafts during excavation at the Mizunami Underground Research Laboratory (MIU), Tono Geoscience Centre, are reduced to the levels below the environmental standards (fluorine: 0.8 mg/L, boron: 1 mg/L) at a water treatment facility. Coagulation treatment and ion exchange treatment are applied for fluorine and boron respectively. Consequently, we have started research on efficient groundwater treatment for fluorine and boron using radiation-induced graft polymerization adsorbent. Regarding the treatment for boron, over 95% of boron has been removed from groundwater volume of 760 times greater than the volume of the adsorbent. With respect to the fluorine removal, 95% of fluorine has been removed from groundwater volume of 320 times greater than the volume of the adsorbent. As over 90% of fluorine must be removed from the groundwater in order to meet the environmental standard, the treatment method for fluorine using radiation-induced graft polymerization adsorbent is less efficient than for boron and will need further improvement. Therefore, we are planning to perform a durability evaluation and recycling test of adsorbent using improved testing equipment for enhancing the efficiency.

Development and application of fiberous bifunctional phosphonate-sulfonate cation exchanger

Okada, Kenji*; Seko, Noriaki; Tamada, Masao; Jo, Akinori*

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 44, 2007/02

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2006-042.pdf

no abstracts in English

Bifunctional phosphonate fiber derived from vinylbiphenyl-grafted polyethylene-coated polypropylene fiber for extremely rapid removal of iron(III)

Jo, Akinori*; Okada, Kenji*; Nakao, Mitsuhiro*; Sugo, Takanobu; Tamada, Masao; Katakai, Akio

Nihon Ion Kokan Gakkai-Shi, 14(Suppl.), p.69 - 72, 2003/00

The titled bifunctional fiber (FVCPS-f) were prepared by treating chloromethylated vinylbiphenyl-grafted polyethylene-coated polypropylene fiber (0.9 denier, length 3.8 cm) with triethyl phosphite, chlorosulfonic acid, and conc. hydrochloric acid, in successive. Phosphorus and sulfur contents of FVCPS-f were 1.8 and 0.7 mmol/g, respectively (acid capacity 4.2 meq/g). Its breakthrough capacity (BC) for Fe(III) gradually decreased with an increase in flow rate of feeds from 20/h to 1000/h in space velocity (SV); for instance, its BC at a SV 1000/h was 0.12 mmol/g, whereas both a commercially available phosphonate resin and a monofunctional phosphonate fiber were not able to give practically meaningful BC at such an extremely high flow rate.

Preparation of ion exchange fiber by emulsion graft polymerization of styrene and chloromethyl styrene

Okada, Kenji; Seko, Noriaki; Tamada, Masao

no journal, , 

no abstracts in English

Emulsion graft polymerization of styrene and chloromethylstyrene in aqueous media

Okada, Kenji; Seko, Noriaki; Tamada, Masao

no journal, , 

no abstracts in English

Evaluation of boron removal from groundwater with graft adsorbent having gulucamin moiety

Hoshina, Hiroyuki; Seko, Noriaki; Kasai, Noboru; Okada, Kenji; Ueki, Yuji; Tamada, Masao; Iyatomi, Yosuke; Ogata, Nobuhisa

no journal, , 

no abstracts in English