Fig. 1. Effect of Al and iron salts on Fe⁰–mediated destruction of metolachlor. Salts were added on an equal mass basis (0.5 g or 0.5% w/v) with 12.5 g unannealed Fe⁰ to treat 100 mL of metolachlor solution (400 mg L^-1). Rate constants were obtained from first-order fitted equations.