Table 2 Changes in Pb and P bioavailability and in soil pH and electrical conductivity (EC) after application of P-loaded biochar produced from activated biochar.

From: Remediation of Pb-contaminated soil using biochar-based slow-release P fertilizer and biomonitoring employing bioindicators

Treatment

Pb (mg kg−1)

Olsen-P (mg kg−1)

pH

EC (µS cm−1)

Day 15

Day 45

Day 15

Day 45

Day 15

Day 45

Day 15

Day 45

Control

19.37

14.53

591.33

626.33

6.29

6.24

154

141

0.5% Biochar 450 °C

0.66

0.66

3039.91

672.89

6.33

6.42

218

231

1.0% Biochar 450 °C

0.66

0.66

2832.42

792.72

6.35

6.43

280

238

2.0% Biochar 450 °C

2.42

0.66

3227.40

723.25

6.38

6.48

364

273

0.5% Biochar 500 °C

0.66

0.66

2237.44

785.77

6.32

6.35

332

236

1.0% Biochar 500 °C

0.66

0.66

2332.44

811.82

6.34

6.38

343

318

2.0% Biochar 500 °C

0.66

0.66

2647.42

922.96

6.39

6.44

356

369

0.5% Biochar 550 °C

7.27

0.66

2170.30

631.21

6.37

6.39

256

217

1.0% Biochar 550 °C

2.42

2.42

2267.44

683.31

6.45

6.41

255

222

2.0% Biochar 550 °C

7.27

2.42

2442.43

707.62

6.52

6.56

293

235

0.5% Biochar 600 °C

7.27

2.42

2567.43

653.78

6.41

6.32

287

266

1.0% Biochar 600 °C

7.27

2.42

2337.44

707.62

6.52

6.35

290

282

2.0% Biochar 600 °C

7.27

2.42

2637.43

731.93

6.63

6.38

292

292

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