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. 2017 Apr 28;12(4):e0176484. doi: 10.1371/journal.pone.0176484

Fig 1. Fe(III) reduction rate constants (a) in the presence of simulated sunlight and (b) under dark conditions for various types of standard HS at pH 7.0 and 8.0.

Fig 1

Error bars indicate standard deviation from triplicate measurements. “n.a.” indicates no data available.