Radioactive fallout cesium in sewage sludge ash produced after the Fukushima Daiichi nuclear accident

Kozai, Naofumi; Suzuki, Shinichi; Aoyagi, Noboru; Sakamoto, Fuminori; Onuki, Toshihiko

Water Research, 68, p.616 - 626, 2015/01

https://doi.org/10.1016/j.watres.2014.10.038

The radioactive fallout cesium (Cs) in the sewage sludge ashes (SSAs) produced after the Fukushima Daiichi Nuclear Accident was tested. Two of tested five SSAs contained Cs above the radioactivity criterion for controlled landfill disposal in Japan. The minerals of SSAs are divided into two groups: an HCl-soluble phase mainly composed of phosphates and metal oxides; and silicates. The majority of Cs was contained in the HCl-soluble phase. Among the HCl-soluble subphases, Fe-bearing phases, probably iron oxides, were mainly responsible for Cs retention. Pre-pulverizing SSAs and heating them in an aqueous HCl was the most effective method of dissolving the HCl-soluble phase. The radioactivity concentrations of Cs in all the HCl-treatment residues were below the criterion. This residue was mostly composed of silicates. Static leaching tests of the residue revealed that Cs is very stably immobilized in the silicates.

Degradability of radiation crosslinked PCL in the supercooled state under various environments

Darwis, D.*; Mitomo, Hiroshi*; Yoshii, Fumio

Polym. Degrad. Stab., 65, p.279 - 285, 1999/00

https://doi.org/10.1016/S0141-3910(99)00017-8

no abstracts in English

Future development of water treatment technology

Hashimoto, Shoji

Genshiryoku eye, 44(8), p.34 - 36, 1998/08

https://ci.nii.ac.jp/naid/40005191863

no abstracts in English

Inactivation of pathogenic bacteria by gamma-irradiation and cultivation of antagonistic bacteria in sewage sludge

N.Sermkiathipong*; S.Pongpat*; Hashimoto, Shoji; C.Banditsing*; Ito, Hitoshi

Biocontrol Science, 2(2), p.55 - 60, 1997/00

https://doi.org/10.4265/bio.2.55

no abstracts in English

Sewage treatment technologies by electron beams

JAERI-Research 95-006, 65 Pages, 1995/02

JAERI-Research-95-006.pdf:2.58MB

no abstracts in English

Treatment of supernatant from sewage sludge by electron beam irradiation combined with ozone

Hosono, Masakazu; Arai, Hidehiko; Aizawa, Masaki*; Shimooka, Toshio*; Shimizu, Ken*; Sugiyama, Masahi*

Mizu Shori Gijutsu, 36(5), p.11 - 17, 1995/00

no abstracts in English

The Present conditions and prospects on radiation utilization for the purpose of environmental preservation

*; Tokunaga, Okihiro; Arai, Hidehiko; Hashimoto, Shoji

Kankyo Eisei Kogaku Kenkyu, 7(3), p.177 - 182, 1993/07

no abstracts in English

Treatment test of supernatant from sewage sludge by irradiation of high energy electron beams under supersaturation with oxygen

Hosono, Masakazu; Arai, Hidehiko; Aizawa, Masaki*; Shimooka, Toshio*; Yamamoto, Ichiro*; Shimizu, Ken*; Sugiyama, Masahi*

JAERI-M 93-007, 35 Pages, 1993/02

JAERI-M-93-007.pdf:1.23MB

no abstracts in English

Application of radiation sewage sludge treatment

Hashimoto, Shoji; Mosharraf*

Gesuido Kenkyukai Hokokusho, No.15, 0, p.24 - 26, 1993/00

no abstracts in English

Electron beam disinfection of sewage sludge

Hashimoto, Shoji

Proceedings of the International Conference on Evolution in Beam Applications, 0, p.466 - 469, 1992/00

no abstracts in English