Fe, Mn and U accumulations in naturally growing at the mill tailings pond; Iron plaque formation possibly related to root-endophytic bacteria producing siderophores

Nakamoto, Yukihiro*; Doyama, Kohei*; Haruma, Toshikatsu*; Lu, X.*; Tanaka, Kazuya; Kozai, Naofumi; Fukuyama, Kenjin; Fukushima, Shigeru; Ohara, Yoshiyuki; Yamaji, Keiko*

Minerals (Internet), 11(12), p.1337_1 - 1337_17, 2021/12

https://doi.org/10.3390/min11121337

Mine drainage is a vital water problem in the mining industry worldwide because of the heavy metal elements and low pH. Rhizofiltration using wetland plants is an appropriate method to remove heavy metals from the water via accumulation in the rhizosphere. is one of the candidate plants for this method because of metal accumulation, forming iron plaque around the roots. At the study site, which was the mill tailings pond in the Ningyo-toge uranium mine, has been naturally growing since 1998. The results showed that accumulated Fe, Mn, and U in the nodal roots without/with iron plaque compared with other plant tissues. Among the 837 bacterial colonies isolated from nodal roots, 88.6% showed siderophore production activities. Considering iron plaque formation around roots, we hypothesized that microbial siderophores might influence iron plaque formation because bacterial siderophores have catechol-like functional groups. The complex of catechol or other phenolics with Fe was precipitated due to the networks between Fe and phenolic derivatives. The experiment using bacterial products of root endophytes, such as spp. and spp., showed precipitation with Fe ions, and we confirmed that several spp. and spp. produced unidentified phenolic compounds. In conclusion, root-endophytic bacteria such as spp. and spp., isolated from metal-accumulating roots of , might influence iron plaque formation as the metal accumulation site. Iron plaque formation is related to tolerance in , and spp. and spp. might indirectly contribute to tolerance.

History and current situation of mine water treatment in Ningyo-toge Uranium Mine

Nagayasu, Takaaki; Taki, Tomihiro; Fukushima, Shigeru

JAEA-Technology 2016-031, 53 Pages, 2017/02

JAEA-Technology-2016-031.pdf:4.42MB

The forerunner of JAEA, found a smelter in 1964 to do industrialization tests of hydrometallurgical extraction process from domestic uranium ore to uranium tetrafluoride, extracted at Ningyo-toge. Yotsugi Mill Tailings Pond was constructed for the purpose of depositing slag and other things generated due to the operation of the smelter. Furthermore supernatant water from the deposition field had been treated appropriately at wastewater treatment facilities, which has been provided in the downstream site of the pond. We have been utilizing the Yotsugi Mill Tailings Pond as a temporary storage field of mine water generated from the old mining gallery, mainly. After filing an abolition report of facilities of the smelter, with the completion of industrial trials of refinery in 1982. Ningyo-toge environmental engineering center has studied for processing uranium and radium, in wastewater, which must be reduced more safely by advancing these processing technical development. Supernatant water of The Pond is treated at the wastewater treatment facilities before discharging to Ikegogawa-river. And those collateralize the emission standards to discharge to the river set at the Center with continuing stable processing. This document summarized the history of the wastewater treatment, technical development for the water treatment, and the current situation of the water treatment.

Water penetration test using mock protection layer system for multi-layered capping planned in Ningyo-toge Environmental Engnieering Center

Fukushima, Shigeru; Taki, Tomihiro; Saito, Hiroshi; Torikai, Kazuyoshi; Sato, Yasushi*

Nihon Chikasui Gakkai 2013-Nen Shuki Koenkai Koen Yoshi, p.258 - 263, 2013/10

no abstracts in English

Development of reactivity feedback effect measurement techniques under sub-critical condition in fast reactor, 1-5; FCA experimental plan

Fukushima, Masahiro; Okajima, Shigeaki; Kitamura, Yasunori; Ando, Masaki; Yamane, Tsuyoshi; Mori, Takamasa; Nishi, Hiroshi; Yamane, Yoshihiro*; Kanemoto, Shigeru*

no journal, , 

no abstracts in English

Development of reactivity feedback effect measurement techniques under sub-critical condition in fast reactor, 2-1; Skelton of program

Okajima, Shigeaki; Nishi, Hiroshi; Kanemoto, Shigeru*; Yamane, Yoshihiro*; Fukushima, Masahiro; Kitamura, Yasunori; Kitano, Akihiro; Suzuki, Takayuki; Ando, Masaki; Yamane, Tsuyoshi

no journal, , 

no abstracts in English

A Validation study on applicability of the thermal-hydrological-chemical coupling method to manage groundwater quantities and qualities in Yotsugi Former Open-pit Mine

Tawara, Yasuhiro*; Yoshida, Takafumi*; Fukushima, Shigeru; Ohara, Yoshiyuki

no journal, , 

no abstracts in English

Seismic response analysis of tailing dam foundation on discontinuous rock masses and counter measure design

Sasaki, Takeshi*; Koshigai, Masaru*; Horikawa, Shigeo*; Fukushima, Shigeru; Ohara, Yoshiyuki

no journal, , 

Application of hydro-chemical coupled simulator for control work design to reduce polluted water in Ningyo-toge uranium mine

Tawara, Yasuhiro*; Yoshida, Takafumi*; Matsuura, Taichi*; Fukazawa, Soki*; Tokoro, Chiharu*; Fukushima, Shigeru; Ohara, Yoshiyuki

no journal, , 

no abstracts in English

Elucidation of radionuclide (U) and heavy metal (Fe, Mn) accumulation mechanism in phragmites australis influenced by root endophytic bacteria

Nakamoto, Yukihiro*; Yamaji, Keiko*; Haruma, Toshikatsu*; Doyama, Kohei*; Ohara, Yoshiyuki; Tanaka, Kazuya; Fukuyama, Kenjin; Fukushima, Shigeru

no journal, , 

no abstracts in English

Seepage flow analysis during earthquake on jointed rock mass using multiple yield models

Horikawa, Shigeo*; Sasaki, Takeshi*; Koshigai, Masaru*; Fukushima, Shigeru; Ohara, Yoshiyuki

no journal, , 

no abstracts in English