fig4

Figure 4. Impacts of different factors of ZSC on the MG adsorption. (A) Adsorption equilibrium time (operation condition: initial pH = stock solution, ZSC dosage = 2 g/L, MG concentration = 300 mg/L, and room temperature); (B) Initial pH of solution (operation condition: reaction time = 120 min, ZSC dosage = 2 g/L, MG concentration = 300 mg/L, and room temperature); (C) MG concentration (operation condition: initial pH = 10.0, reaction time = 120 min, ZSC dosage = 2 g/L, and room temperature); (D) ZSC dosage (operation condition: initial pH = 10.0, reaction time = 120 min, MG concentration = 150 mg/L, and room temperature); (E) Adsorption temperature (operation condition: initial pH = 10.0, reaction time = 120 min, ZSC dosage = 2 g/L, and MG concentration = 150 mg/L); and (F) Comparison results of MG removal rate by ZSC and SC. ZSC: ZnCl₂ modified sludge biochar; MG: malachite green; SC: unmodified sludge biochar.