Metals

Artisanal miners (N=100)

UNILU’s Students (N=109)

Median

5th percentile

95th percentile

Median

5th percentile

95th percentile

Aluminum

3,236.425

685.830

8,249.292

380.379

244.454

707.794

Antimony

0.550

0.173

1.423

0.076

0.029

0.139

Silver

15.985

2.980

153.707

0.151

0.050

0.379

Barium

27.054

13.442

83.421

2.763

1.918

4.278

Beryllium

0.109

0.023

0.753

0.020

0.001

0.006

Cadmium

2.152

0.153

5.795

0.322

0.118

0.487

Calcium

3,083.189

1,272.223

7,700.213

517.859

252.870

830.368

Cerium

3.406

0.623

7.529

0.421

0.305

0.535

Chrome

14.221

3.765

70.311

1.161

0.680

2.124

Cobalt

165.428

82.568

6,322.123

1.667

0.802

2.402

Copper

1,024.496

426.567

12,511.666

49.859

15.965

232.124

Tin

1.722

0.748

4.369

0.213

0.100

0.613

Iron

5,977.558

2,692.502

73,091.729

235.247

138.867

307.412

Magnesium

420.499

225.000

1,296.397

64.893

41.949

107.700

Manganese

371.496

155.996

5,283.831

8.901

4.352

13.350

Mercury

4.397

1.148

12.820

0.341

0.190

0.598

Molybdenum

0.580

0.159

1.556

0.115

0.078

0.209

Nickel

20.743

9.076

87.038

0.487

0.252

0.964

Lead

67.817

14.606

247.882

17.774

6.812

26.178

Thallium

0.081

0.029

0.272

0.008

0.007

0.013

Vanadium

66.414

33.740

1,700.389

0.791

0.440

1.400

Zinc

328.491

193.945

942.206

52.185

35.586

66.739

Table 3: Metals track contents in hand miners and in the students of Lubumbashi University