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Table 2 Parameters of reductive dissolution kinetics

From: Reductive dissolution of As(V)-bearing Fe(III)-precipitates formed by Fe(II) oxidation in aqueous solutions

Label Wet solids Dried solids Ratio dried/wet
t a50% (h) t b1/2 (h) kapp (h−1) t a50% (h) t b1/2 (h) k capp (h−1) For t50% (−) For t1/2 (−)
Ca-00-00 5.4 5.4 0.13 7.4 7.5 0.092 1.36 1.39
Ca-01-00 1.6 1.7 0.41 2.8 2.8 0.25 1.78 1.67
Ca-02-00 1.5 1.5 0.47 2.3 2.5 0.28 1.55 1.70
Ca-05-00 2.7 2.8 0.25 4.3 4.3 0.16 1.63 1.55
Ca-15-00 6.9 6.9 0.10 7.6 7.8 0.089 1.11 1.12
Na-15-00 7.5 7.7 0.090 7.8 8.3 0.084 1.04 1.07
Ca-02-05 2.9 2.6 0.26 4.0 4.2 0.17 1.40 1.58
Ca-02-10 6.2 6.2 0.11 8.0 7.9 0.088 1.12 1.22
Ca-00-10 35 33 0.021 39 40 0.017 1.30 1.26
2L-Fh 5.0 5.6 0.12 27 5.33
  1. aTime required for the dissolution of 50% of the solids; derived from Figs. 1a, b, 2a, b, Additional file 1: Figures S3ab, and S4a by interpolating data points adjacent to 50% Fe reduction or set to time at which 50% Fe reduction was measured
  2. bDissolution half-life time t1/2; calculated from kapp (t1/2 = ln(2)/kapp)
  3. cApparent rate coefficient based on the assumption of pseudo-first-order dissolution kinetics; obtained by linear regression of linearized plots of ln(1 − c(t)/Fetot) versus t for data points up to 63% Fe dissolution (Figs. 1c, d, 2c, d and Additional file 1: Figure S3cd). The relative standard error for kapp ranged from 0.5 to 5.5%
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