Effect of Alkali Treatment of Wheat Straw on Adsorption of Cu(II) under Acidic Condition

Figure 6

Langmuir and Freundlich adsorption isothermal curves of Cu(II) on wheat straw (conditions: adsorbent dose = 5 g/L, contact time = 6 h, pH = 5, and stirring rate = 150 rpm).

(a)

(b)