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Table 1 Experimental Design

From: Phenylalanine as a hydroxyl radical-specific probe in pyrite slurries

Experiment Set [Phe]o [pyr] Incubation time pH
  (μM) (g/L) (hr)  
A 26.6 100   2.5
  102.8 100 72 2.6
  306.7 100   2.5
B 12.5 100   
  37.1 100   
  97.8 100 120  
  401.5 100   
  1127 100   
C 1 100   
  3 100 6-hour pyrite incubations + 1 hr pyrite and Phe  
  10 100   
  30 100   
  100 100   
D 10.9 25   
  11.4 50   
  11.4 100   
  28.5 25   
  29.5 50   
  28.6 100 12  
  93.9 25   
  91.9 50   
  94.5 100   
  285.2 25   
  281.4 50   
  285.6 100   
E 8.7 5   5.5
  9.4 10   5.1
  9.3 25 16 4.2
  10.4 50   2.9
  10.4 100   2.6
F 81.68 10 72  
  107.2 10 (14 m 2 /g) 240  
G 98.8 50   2.8
  [o-Tyr]o 94.0 50 72  
  [m-Tyr]o 97.6 50   
  [p-Tyr]o 97.7 50   
  1. Experiments A - G listed above with corresponding [Phe]o, initial pyrite loading, incubation time of the experiment, and pH data. The pH was not monitored in every reaction vessel for each experiment as it was not a variable as all (Exp. B, C, F, and G) or multiple vials (Exp. D) had the same pyrite loadings. Reaction vessels in experiment G contained only one reactant each - Phe, o-Tyr, m-Tyr, or p-Tyr. Pyrite was added to the respective dilutions of Phe (or Tyr) to initiate the reaction.