Figure 4 | Scientific Reports

Figure 4

From: Removal of Cr(VI) from aqueous solution using ball mill modified biochar: multivariate modeling, optimization and experimental study

Figure 4

Effects of different parameters: (a) solution pH (C0 = 50 mg/L, temperature = 25 °C, oscillation speed = 150 rpm, adsorbent dose = 0.1 g, contact time = 5 h); (b) Temperature effect (C0 = 110 mg/L, oscillation speed = 150 rpm, solution pH = 2.0 ± 0.1, adsorbent dose = 0.1 g); (c) Effect of initial concentration (temperature = 25 °C, shaking speed = 150 rpm, solution pH = 2.0 ± 0.1, adsorbent dose = 0.1 g, contact time = 5 h); (d) The effect of contact time (temperature = 25 °C, oscillation speed = 150 rpm, solution pH = 2.0 ± 0.1, adsorbent dose = 0.1 g) on the adsorption of Cr(VI) onto BM-WB; (e) Effect of adsorbent dose (C0 = 50 mg/L, temperature = 25 °C, shaking speed = 150 rpm, solution pH = 2.0 ± 0.1, contact time = 5 h).

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