Parameters

Contaminated soil

Biochars

Compost

Rice husk

Cashew nut shell

pH

5.70

7.40

6.30

8.70

TOC

1.80

-

-

-

Sand (%)

43

-

-

-

Silt (%)

59

-

-

-

Clay (%)

9

-

-

-

N (mg/kg)

600

13,200

23,000

9600

Ca (mg/kg)

213

9780

5340

29,000

Mg (mg/kg)

86

3530

135

4540

P (mg/kg)

71.5

197

107

2090

K (cmol/kg)

0.46

12.4

2.80

21.9

CEC (cmol/kg)

4.62

110

36.9

210

Pb (mg/kg)

18,300

0.90

1.20

1.50