Table 4 The effect of different silica nano levels on soil pH and DTPA- extractable concentrations of heavy metals.

From: Nano silica-mediated stabilization of heavy metals in contaminated soils

Nano-silica (mg/kg)

DTPA-extractable heavy metal concentration (mg kg)

pH

Pb

Zn

Cu

Ni

Cr

0

5.54a

27.12 a

7.75 a

6.24 a

9.42 a

7.43 c

100

7.54 a

27.1 a

7.73 a

6.23 a

9.41 a

7.7 b

200

7.16 b

25.92 b

7.4 b

6 b

9.08 b

7.79 b

500

6.86 bc

24.95 c

7.13 c

5.77 c

8.76 c

7.87 a

1000

6.63 c

24.08 d

6.85 d

5.61 d

8.52 d

7.88 a

  1. Means within a column with a common letter are not significantly different (P \(<\) 0.05).
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