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Table 3 Environmental tea dust measurements of four tea manufacturing factories

From: Pulmonary function, respiratory symptoms, and dust exposures among workers engaged in early manufacturing processes of tea: a cohort study

Factory

Inhalable Dusts (mg/m3)

Respirable Dusts (mg/m3)

Coarse Fraction (mg/m3)

 

Withering

Panning

Ball-Rolling

Withering

Panning

Ball-Rolling

Withering

Panning

Ball-Rolling

A

0.81

1.25

2.51

0.19

0.74

0.29

0.62

0.51

2.22

B

0.93

3.24

2.32

ND*

0.74

0.27

0.93

2.5

2.05

C

1.19

1.79

5.61

0.41

0.60

0.55

0.78

1.19

5.06

D

1.13

1.83

2.64

0.27

1.04

0.25

0.86

0.79

2.39

Mean ± SD

1.01 ± 0.18

2.03 ± 0.85

3.27 ± 1.57

0.21 ± 0.17

0.78 ± 0.19

0.34 ± 0.14

0.80 ± 0.13

1.25 ± 0.88

2.93 ± 1.43

  1. *ND non-detectable