1 1 2 12

/

(Katsoyiannis et al., 2006)

(Biogenic iron oxyhydroxides: BIOS)

(Se(IV), Se(VI))(Cs)BIOS

BIOS BIOS Ferrihydrite Stalk Sheath BIOS Ferrihydrite pH3 10 , Cs, Se(IV), Se(VI) 0.01 MpH3 pH1025 C 24 Cs, Se(IV), Se(VI) ICP-MS Se Cs K XAFS

(pHiep) Ferrihydrite pHiep=8.0 BIOS pHiep=4.5BIOS pH Cs BIOS Ferrihydrite Se Se(IV)O32-, Se(VI)O42- FerrihydriteBIOS Se(IV) Se(VI) pH>5 Se(VI) BIOSXAFSCs Se(VI) BIOSSe(IV) FerrihydriteCs Se(VI)Se(IV)BIOS Cs, Se(IV), Se(VI) Ferrihydrite

Cesium and selenium sorption onto natural ferrihydrite: Comparison with synthetic ferrihydrite *S. Kikuchi1, T. Kashiwabara1, Y. Takahashi2 (1JAMSTEC, 2Grad. School of Sci., Univ. Tokyo)

1A01

1, 2, 3, 4

(1, 2, 3, 4)

(, 2005),

(100ppb).

, 6 4.

. , pH

(, 2008).

(MgO) pH10 Se()(

, 2016 ). Se() MgO

(Mg(OH)2). Se()

, X(XAFS), MgO Se()

.

MgO:M511(M511). , M511NaCl 0.01 M

60, Mg(OH)2( Brucite). ,

BET, XRD.

NaCl 0.01 M, 2 M(160 g/L)100 M(8000 g/L)

50 ml 2 g/L ,

25 10 0.5-60 .

pH ,, . , .

ICP-OESMg, ICP-MS Se. XRD.

pH Ca,Mg,Se Geochemists

Workbench(GWB,1998). MgSeO36H2O ,

BL-9A Se K- XAFS.

(160 g/L) Se() XRD M511 24 Mg(OH)2

. pH,30 11, . M511

M511 Brucite Se(), . 160 g/L

Se(), M511 g/L Se(), BruciteM511

, 58 g/L. (800 g/L) Se()

M511 60 g/L. Se K XAFS

MgSeO36H2O, Se(). , EXAFS

1.5 < k/ < 3M511 Brucite, Se.

MgO Se().

: : , M040015(2005)

, , , 47(2008) 121-158

Selenite sorption mechanism on magnesium oxide under highly alkaline conditions

*MIYASITA Shun1, FUKUSHI Kesuke2, MORODOME Shoji 3, TAKAHASHI Yoshio4

(1Department of Nature System, Kanazawa Univ., 2Institute of Nature and Environmental Technology,

Kanazawa Univ., 3Kunimine Industries, 4Graduate School of Science, The University of Tokyo)

1A02

Pt/Pd

1 1 2 1 1 12

Pt Pd Pt/Pd 1PtPd100Pt/Pd -MnO2Pt(II)Pd(II)Pt/Pd

Cl- 0.56 mol/dm3(II)(II) PdPt(4.0, 8.0 10-9 mol/dm3) -MnO2 (IV) 1.0 g -MnO2 (IV) 0.5 mol/dm3 MnPd Pt ICP-MS Pd or Pt / Mn() Pt(II)Pd(II)XAFSPt(II) Pt(IV) Pd(II) Pt(II) Pd(II)

XAS Pt/Pd Geochemical model experiments to elucidate the "Pt / Pd anomaly" in marine manganese crust *Kazuya Tanaka1, Daisuke Kawamoto1, Hironori Ohashi2, Yoshihiro Okaue1, Takushi Yokoyama1 1Faculty of Science, Kyushu University, 2Faculty of Symbiotic Systems Science, Fukushima

1A03

1 1 2 12

[] (-MnO2)()

(pKa)(Takahashi et al., 2007)(As)(Sb)pKa 4AsSb (As 4 4 Sb 6 8 )AsSb -MnO2 X (XAFS) [] ()MnO2 AsSb -MnO2 AsSb AsSbICP-MSAsSbX(XAFS) [] MnO2As Sb

As -MnO2 SbXAFS AsSb As -MnO2Sb Sb(VI)6 8 Fe3+ Mn4+AsSb

Fe3+Mn4+ Concentration mechanisms of trace elements in ferromanganese nodule : Arsenic and Antimony *S. Uesugi1, M. Tanaka1, T. Kashiwabara2, Y. Takahashi1 (1Graduate School of Science, The University of Tokyo., 2Japan Agency for Marine-Earth Science and Technology)

1A04

Ge/Si

74/70Ge ~ -44[1]Pokrovsky 1.7-4.4[2] 6 ()X (XAFS) XAFS -MnO2pH 7 I=0.001M 25 24 SPring-8 BL01B1 KEK PF BL-12C Ge K XAFS DFT XAFS Ge K EXAFS XANES -MnO2

DFT 2.5

6 [1] R. Escoube, et al., Geostand. Geoanal. Res., 36 (2013) 149-159.; [2] O.S. Pokrovsky et al., Geochim. Cosmochim. Acta, 131 (2014) 138-149. Isotope fractionation analysis during adsorption of germanium on minerals. *M. Tanaka and Y. Takahashi (The Univ. of Tokyo)

1A05

1 2 3 1 1 1 123

(Au)(III)(Au(III)) Au Au(III)Au(III)[AuCl4]- Cl-pH Cl- OH-[AuCl4-n(OH)n]- (n=1-4)Au(III)

Au(III)[AuCl4]-[AuCl3(OH)]-[AuCl2(OH)2]-

[AuCl4]-[AuCl4-n(OH)n]- (n=0-4)

DV-X Au(III)

DFT -1 [AuCl4-n(OH)n]-(n=1-4) Au xy Au +3Cl -1 OH-1 DV-X Au 1s 6sCl 1s 3pO 1s 2pH 1s [AuCl4]- 1 Cl- OH- Au Au-Cl Au-O Cl O Au(III)

Relationship between adsorption force of Au(III) complex ion on metal oxides and its hydrolysis D. Kawamoto1, T. Kurisaki2, K. Yonezu3, Y. Okaue1, M. Tokunaga1, T. Yokoyama1(1Science, Kyushu Univ., 2Fukuoka Univ., 3Engineering, Kyushu Univ.)

1A06

500m

500m

pH

1A07 (Invited)

pH 8

-180mV Na-Cl ICP-MS 0.1100m

1,000L 40

10800.1m PHREEQC Fe(OH)3

pH 9.70.1m 0.8mgL

ZnS

Colloidal solutes transport processes in deep underground. *T. Iwatsuki, M. Kubota, K. Hayashida and T. Kato (Japan Atomic Energy Agency, Mizunami Underground Research Laboratory)

2 A

1 A F Ca2+

() 5 8

pH

X pH 2 Ca2+A FCa2+ A FF Ca2+

X

Behaviors of the elements and weathering processes in the water-granite reaction experiment *M. Niwa, and Y. Terakado (Kobe Univ.)

1A08

/

1 2

1 2

CaCO3 (Stack et al., 2014

Environ. Sci. Technol.)U(VI)(Jung et al., 2012 Environ. Sci. Technol.)

(Baca et al., 2008 Chem. Eur. J.)

/

Fuji Silysia 75150 m

2 nm738 m2/g 50 nm73 m2/g 1 mM 100 mM

NaCl /

0.1 M NaOH 0.1 M HCl 25 C

>Si-OH

H+ 1 mM

>Si-OH

100 mM

Surface charge density at silica/water interface: the role of pore size

*N. Nishiyama1 and K. Fukushi2 (1NIMS, 2Kanazawa Univ.)

1A09

1 1 2 3 123

Ca5(PO4)3(F,Cl,OH) FClOH (Harlov, 2015)

(e.g., Greenwood et al., 2008; Greenwood et al., 2011; Usui et al., 2015)

Durango (~500 ppm H2O)Morocco(~5000 ppm H2O)Durango c(Cameca ims 4f-E7 SIMS)

(Itoh et al., 2015)MoroccoDurango 2(Higashi et al., 2016)c c

References Harlov (2015) Elements, 11, 171176. Greenwood et al. (2008) Geophys. Res. Lett. 35, L05203. Greenwood et al. (2011) Nature Geosci., 4, 7982. Usui et al. (2015) Earth Planet Sci. Lett., 410, 140151. Itoh et al (2015) Goldschmidt abstract, 1394. Higashi et al. (2016) Goldschmidt abstract, 1116. Hydrogen diffusion in fluorapatite *Y. Higashi1, S. Itoh1, K. Watanabe2 and I. Sakaguchi3 (1Kyoto Univ., 2Kyushu Univ. 3NIMS.)

1A10

1 1 2 1 2

2011

NaCl

ICP-MS Na, Mg, Al, Fe, Mn MgSiMn 420, 359, 0.4 mg/kg 6, 217, 0.01mg/kgAlFe6.9, 1.2 mg/kg(0.2, 0.8 mg/kg)Al

Al Mn0 1 45

Si Mg, Mn, Fe

Observation of geochemical change of soft rocks during subsidence Fumie Chikaoka1, Harue Masuda1, Kiyoshi Kawabata2 (1Graduate School of Science, Osaka City Unviersity, 2Osaka Museum of Natural History)

1A11

1,2,3 1,2 1 1 4

4 1234

O-H He (Matsubaya et al., 1973)e.g., Ichiki et al., 2015e.g., Kawamoto et al., 2013; Sakuma and Ichiki, 2016 O-H

e.g., 2014; Kusuda et al., 2014Sr-Nd-PbREEsNakamura et al.,2015REEs-Nakamura et al., 2016

O-H MORB REE REE REE

Variety of spring waters along the Itoigawa-Shizuoka Tectonic Line and its origin inferred from REE composition *H. Nakamura1,2,3, H. Iwamori1,2, K. Chiba1, Q. Chang1, N. Morikawa4 and K. Kazahaya4 (1JAMSTEC, 2Tokyo Institute of Technology, 3 Chiba Institute of Technology, 4AIST)

1A12

CK16-01

1 1 2 2 2

2 2 2 2 2

2 3CK16-01 123

2016 2 29 3 17 SIP208.5 m107.5 m9.5 m 121.0 m 1 m 1 m CT 1025 cm IODP pH 30 m

80 m 80 m150 m150 m 80 m 80150 m 70 m

40 m 30 m 4060 m 1020 m

30 m 30 m 50 m 60 m 60 m Chemical compositions of interstitial waters from Iheya North Knoll and Noho Site during CK16-01 cruise *T. Toki1, R. Shinjo1, T. Nunoura2, A. Makabe2, Y. Matsui2, S. Kawagucci2, M. Saitoh2, S. Kato2, S. Nakagawa2, E. Tasumi2, M. Hirai2, J. Ishibashi3, and CK16-01 On-board member (1Univ. Ryukyus, 2JAMSTEC, 3Kyushu Univ.)

1A13

1 1 1 1 1

(FeCr2O4)

(Otake et al., 2013; Arai and Akizawa, 2014)

((Cr, Fe)(OH)3) (Fe2+(aq))

(Fe3O4) Fe2+(aq)(Cr, Fe)(OH)3 150C, 5MPa 164 ( 1)(Cr, Fe)(OH)3 Fe2+(aq)Cr6+(aq) pH 3 9pH, (Cr, Fe)(OH)3

: 2(Fe,Cr)(OH)3 + Fe2+(aq) 2H+ + Fe(Fe,Cr)2O4 + 2H2O (1)

XRD SEM TEM

EDS

(1) Experimental study for the formation of chromian spinel under low-temperature hydrothermal conditions using a flow-through apparatus. *T. Otake1, J. Yang1, Y. Ohtomo1, and T. Sato (1Faculty of Eng., Hokkaido Univ.)

.

1A14

1A011A021A031A041A051A061A07_1A081A091A101A111A121A131A14