Different content of biochar in sand (w/w)

0%

2%

5%

8%

10%

Dchla (mg)

1.8 ± 0.15 (a)

2.8 ± 0.35 (b)

1.0 ± 0.40 (a)

0.8 ± 0.37 (a)

1.4 ± 0.32 (a)

Fixed sands (g)

5.1 ± 0.65 (a)

6.2 ± 1.44 (b)

4.2 ± 0.89 (a)

4.9 ± 0.51 (a)

5.2 ± 0.82 (a)