All the washing experiments were carried out in triplicate using 1 L jars with 120 g soils and 600 mL washing solutions. After 1 h soil washing at 200 rpm, the washed soils were rinsed twice with deionized water.
All the washing experiments were carried out in triplicate using 1 L jars with 120 g soils and 600 mL washing solutions. After 1 h soil washing at 200 rpm, the washed soils were rinsed twice withdeionized water.