Mercury(II) reduction and sulfite oxidation in aqueous systems: kinetics study and speciation modeling

Transcription

1 Environ. Chem. 2017, 14, doi: /en16169_ac CSIRO 2017 Supplementary material Mercury(II) reduction and sulfite oxidation in aqueous systems: kinetics study and speciation modeling Kurt L. B. Solis, A Go-un Nam A and Yongseok Hong A,B A Department of Environmental Engineering, Daegu University, Gyeongsan-si, Gyeongsangbuk-do, , Republic of Korea. B Corresponding author. yshong@daegu.ac.kr S1

2 Fig. S1. The speciation diagram of sulfite from ph 0 to 14 for [SO 3 2- ] Total = 0.10 mm. Table S1. Activation energy values of S (IV) oxidation with respect to ph and T = C ph Ea (kj/mol) A (1/min) R² Reference E This study This study This study [1] This study Combined S2

3 Thermochemical Values Table S2. Literature Reported Model Parameters Investigated ph Temp ( C) Hg (II) S (IV) Reference Compound/Rxn range/values mm mm Sulfite [2] Sulfite [3] Sulfite [4] Sulfite [5] Sulfite [6] Sulfite [7] Sulfite [8] Sulfite [3] Sulfite [9] Hg-Sulfite [10] Hg-Sulfite [11] Hg in FGD-W [12] Hg in FGD-W [13] Hydraulic Detention Time: 20 min 60 min [14] Some chemicals in FGD Wastewater [14][15][4] Chemical Sulfite Sulfate Mercury Amount (Range) 2000 mg/l 8000 mg/l 0.41 mg/l Table S3. Thermodynamic Constants of Known Reactions, 25 o C Reaction K ΔG ΔH ΔS Reference kj/mol kj/mol J/K mol Hg 2+ + SO 2-3 HgSO [16] Hg SO 3 Hg(SO 3) [17] Hg e - Hg [18] H 2SO 3 H HSO [19] - HSO 3 H SO [19] Hg 2+ + OH - = HgOH [20] Hg OH - = Hg(OH) [20] Hg OH - - = Hg(OH) [20] S3

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