Table 2 Concentration, enrichment factor, geoaccumulation index, contamination factor, and pollution load index of metals for surface soil

Sampling site

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

S1

115,000

1

0.700

2.436

2.877

25,500

0.131

−2.234

0.319

0.597

52,200

0.969

0.655

2.362

1.247

49,900

0.770

0.323

1.876

2.033

S2

156,200

1

1.142

3.309

80,100

0.303

−0.583

1.001

11,000

0.150

−1.592

0.498

46,100

0.524

0.208

1.733

S3

106,200

1

0.585

2.250

31,600

0.176

−1.925

0.395

77,000

1.549

1.216

3.484

54,600

0.912

0.453

2.053

S4

151,800

1

1.100

3.216

80,200

0.312

−0.581

1.003

11,300

0.159

−1.553

0.511

39,800

0.465

−0.004

1.496

S5

171,200

1

1.274

3.627

84,600

0.292

−0.504

1.058

10,800

0.135

−1.618

0.489

50,000

0.518

0.326

1.880

S6

163,400

1

1.207

3.462

76,100

0.275

−0.657

0.951

19,800

0.259

−0.744

0.896

57,600

0.626

0.530

2.165

S7

103,200

1

0.544

2.186

20,300

0.116

−2.563

0.254

38,700

0.801

0.223

1.751

48,500

0.834

0.282

1.823

S8

108,400

1

0.615

2.297

38,400

0.209

−1.644

0.480

36,100

0.711

0.123

1.633

63,100

1.033

0.661

2.372

S9

166,600

1

1.235

3.530

72,900

0.258

−0.719

0.911

17,200

0.220

−0.947

0.778

57,900

0.617

0.537

2.177

S10

182,400

1

1.365

3.864

55,400

0.179

−1.115

0.693

30,000

0.351

−0.144

1.357

63,000

0.613

0.659

2.368

S11

187,800

1

1.407

3.979

78,600

0.247

−0.610

0.983

21,100

0.240

−0.652

0.955

58,600

0.554

0.555

2.203

S12

169,000

1

1.255

3.581

45,700

0.160

−1.393

0.571

61,100

0.772

0.882

2.765

45,500

0.478

0.189

1.711

S13

78,900

1

0.156

1.672

20,700

0.155

−2.535

0.259

38,200

1.034

0.205

1.729

56,800

1.277

0.510

2.135

S14

177,600

1

1.327

3.763

76,000

0.252

−0.659

0.950

31,800

0.382

−0.060

1.439

62,900

0.628

0.657

2.365

S15

156,400

1

1.143

3.314

62,600

0.236

−0.939

0.783

27,700

0.378

−0.259

1.253

55,500

0.630

0.476

2.086

S16

161,000

1

1.185

3.411

87,100

0.319

−0.462

1.089

22,800

0.302

−0.540

1.032

60,700

0.669

0.605

2.282

S17

170,300

1

1.266

3.608

72,700

0.252

−0.723

0.909

23,200

0.291

−0.515

1.050

60,700

0.632

0.605

2.282

S18

94,900

1

0.423

2.011

20,400

0.127

−2.556

0.255

38,300

0.862

0.208

1.733

46,900

0.877

0.233

1.763

S19

67,100

1

−0.077

1.422

17,000

0.149

−2.819

0.213

34,300

1.092

0.049

1.552

58,100

1.536

0.542

2.184

Sampling site

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

S1

9200

0.821

0.415

2.000

2.395

3020

1.458

1.244

3.553

4.351

7300

18.726

4.927

45.625

13.515

813

1.112

0.853

2.710

2.157

S2

12,100

0.795

0.810

2.630

3960

1.408

1.635

4.659

1520

2.871

2.663

9.500

371

0.374

−0.279

1.237

S3

9100

0.879

0.399

1.978

2680

1.401

1.072

3.153

3430

9.528

3.837

21.438

942

1.396

1.066

3.140

S4

12,400

0.838

0.846

2.696

12,400

4.536

3.282

14.588

1400

2.721

2.544

8.750

294

0.305

−0.614

0.980

S5

13,200

0.791

0.936

2.870

3910

1.268

1.617

4.600

1650

2.843

2.781

10.313

334

0.307

−0.430

1.113

S6

12,100

0.760

0.810

2.630

3450

1.172

1.436

4.059

1340

2.419

2.481

8.375

558

0.537

0.310

1.860

S7

11,500

1.143

0.737

2.500

2540

1.367

0.994

2.988

9080

25.955

5.242

56.750

702

1.070

0.642

2.340

S8

9200

0.871

0.415

2.000

3020

1.547

1.244

3.553

950

2.585

1.985

5.938

902

1.309

1.003

3.007

S9

11,700

0.721

0.762

2.543

3860

1.287

1.598

4.541

1700

3.010

2.824

10.625

515

0.486

0.195

1.717

S10

17,800

1.001

1.367

3.870

4860

1.480

1.930

5.718

1320

2.135

2.459

8.250

773

0.667

0.781

2.577

S11

12,000

0.656

0.798

2.609

4030

1.192

1.660

4.741

1480

2.325

2.624

9.250

552

0.462

0.295

1.840

S12

15,300

0.929

1.149

3.326

9570

3.144

2.908

11.259

1700

2.967

2.824

10.625

1050

0.978

1.222

3.500

S13

7800

1.014

0.177

1.696

2240

1.577

0.813

2.635

5710

21.349

4.572

35.688

905

1.805

1.008

3.017

S14

13,000

0.751

0.914

2.826

4070

1.273

1.675

4.788

1180

1.960

2.298

7.375

779

0.690

0.792

2.597

S15

12,200

0.800

0.822

2.652

3460

1.228

1.440

4.071

1390

2.622

2.534

8.688

644

0.648

0.517

2.147

S16

12,100

0.771

0.810

2.630

4200

1.449

1.720

4.941

1000

1.832

2.059

6.250

686

0.670

0.608

2.287

S17

11,700

0.705

0.762

2.543

3960

1.291

1.635

4.659

1100

1.905

2.196

6.875

637

0.588

0.501

2.123

S18

7500

0.811

0.120

1.630

2130

1.246

0.740

2.506

7190

22.350

4.905

44.938

731

1.212

0.700

2.437

S19

5920

0.905

−0.221

1.287

1870

1.548

0.553

2.200

5440

23.917

4.503

34.000

776

1.820

0.786

2.587

Sampling site

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

Conc. (ppm)

EF

I _geo

CF

PLI

S1

430

1.261

1.034

3.071

3.561

350

1.512

1.296

3.684

3.993

123

8.414

3.773

20.500

20.866

2210

1.296

1.074

3.157

5.71

S2

430

0.928

1.034

3.071

320

1.018

1.167

3.368

126

6.346

3.807

21.000

2310

0.997

1.138

3.300

S3

473

1.502

1.171

3.379

363

1.698

1.349

3.821

124

9.185

3.784

20.667

4560

2.895

2.119

6.514

S4

427

0.948

1.024

3.050

287

0.939

1.010

3.021

123

6.374

3.773

20.500

3010

1.337

1.519

4.300

S5

520

1.024

1.308

3.714

264

0.766

0.890

2.779

102

4.687

3.503

17.000

2590

1.020

1.303

3.700

S6

580

1.197

1.466

4.143

370

1.125

1.377

3.895

128

6.162

3.830

21.333

3850

1.589

1.874

5.500

S7

391

1.277

0.897

2.793

423

2.036

1.570

4.453

105

8.004

3.544

17.500

4205

2.747

2.002

6.007

S8

542

1.686

1.368

3.871

431.5

1.978

1.598

4.542

164

11.902

4.188

27.333

4560

2.836

2.119

6.514

S9

500

1.012

1.252

3.571

440

1.312

1.627

4.632

158

7.461

4.134

26.333

4410

1.785

2.070

6.300

S10

620

1.146

1.562

4.429

330

0.899

1.212

3.474

136

5.865

3.918

22.667

3630

1.342

1.790

5.186

S11

640

1.149

1.608

4.571

620

1.640

2.121

6.526

132

5.529

3.874

22.000

6070

2.179

2.531

8.671

S12

660

1.317

1.652

4.714

260

0.764

0.868

2.737

100

4.655

3.474

16.667

11400

4.548

3.441

16.286

S13

372

1.590

0.825

2.657

415

2.613

1.542

4.368

112

11.167

3.637

18.667

8065

6.892

2.941

11.521

S14

650

1.234

1.630

4.643

570

1.595

2.000

6.000

143

6.334

3.990

23.833

4730

1.796

2.171

6.757

S15

538

1.160

1.357

3.843

310

0.985

1.121

3.263

120

6.036

3.737

20.000

4680

2.018

2.156

6.686

S16

680

1.424

1.695

4.857

290

0.895

1.025

3.053

118

5.766

3.713

19.667

2400

1.005

1.193

3.429

S17

600

1.188

1.515

4.286

420

1.225

1.559

4.421

148

6.837

4.040

24.667

2960

1.172

1.495

4.229

S18

335

1.190

0.674

2.393

470

2.461

1.722

4.947

132

10.942

3.874

22.000

4000

2.842

1.930

5.714

S19

325

1.633

0.630

2.321

490

3.628

1.782

5.158

107

12.544

3.572

17.833

3600

3.618

1.778

5.143