Transcription of ナノ粒子デバイスによる環境 ... - makino-co.co.jp
1 1. 350. Signal intensity(-). 300. Blank 250. 200. 150. Ceria Ceria 1wt%. 100. 50. 0. 0 5000 10000 15000. Time(ms). Fig. 1 T2 relaxation time of As solution blank Ceria Ceria 1wt%.. H+ H+ .. 2. Rsp 2-1 . H+ Rsp . H+ . H+ Rav: . Rb: . H+ . -Rsp H+ .. 1) . H+ Pulse-NMR pH .. - T2 - pH H+ . T1 H+ . Fig. 1 T2 .. 2-2.. H+ .. As .. H+ . Mitsunori KONDO:TEL:0569-36-0121 3. 3-2.. 3-1.. NMR H+ . As(III) As(V) . 100 ppm pH ~ ( ) . As ppb . NMR . XAFS As As . NMR R2sp Fig. 2 XAFS . Fig. 3 . 500 ms -S As -S . Fig. 4 (Fig. 5) -S . As(III) As(V) As . As(III) As . NMR . R2sp.
2 Y = + R2sp(-). R = S. As(III) wastewater As(V) 0. 0 1 0 2 4 6 8 10 12 14. pH Conc. of As (ppm). Fig. 2 Effect of pH in arsenic adsorption by ceria particle. Fig. 5 Correlation of concentration of As and S. 18. As(III) As(V). Table 1 Results of wastewater by NMR. 16. As(V) Particle/Liquid Conc. of As 14 S S. (mg/mL) (ppb). As(V) Normalized x (E). 12. As(V) 10 As(III) 8. 6. As(III) 4.. As(III) Pulse-NMR . 4. Standard As(V) . 2. Rsp . Standard As(III). 0 pH . 11850 11870 11890.. Energy (eV).. Fig. 3 Result of XAFS. (As K-edge XANES). NMR.. 5.. 1) E. Sabadini, F.
3 C. Egidio, F. Y. Fujiwara, et. al, J. Phys. Chem. , B2008, 112, p3328 - 3332 (2008). [ ]. 27 .. Fig. 4 Adsorption structure of arsenic on ceria particle.
