Figure 4
From: Advanced Modified Polyacrylonitrile Membrane with Enhanced Adsorption Property for Heavy Metal Ions

(a) Effect of concentration on adsorption capacity, (pH: 6.5, temperature: 25 °C and adsorption time: 720 min) (b) Effect of pH on adsorption capacity (Cu2+ concentration: 20 mg/L, temperature: 25 °C and adsorption time: 720 min) and (c) Effect of temperature on adsorption capacity. (Cu2+ concentration: 20 mg/L, pH:6.5, and adsorption time: 720 min).