Table 5 The frequency of physical and chemical variables in water studies in Iranian environmental health journals (2008–2017)
From: A glance at one decade of water pollution research in Iranian environmental health journals
| Variables | Types | Number* | Percentage |
|---|---|---|---|
| Physical properties of water | Temperature | 58 | 13.4 |
| Turbidity | 57 | 13.2 | |
| Aesthetic (taste and odor) | 2 | 0.46 | |
| Chemical properties of water | Acidity | 44 | 10.2 |
| Hardness | 34 | 7.9 | |
| Electrical conductivity | 21 | 4.8 | |
| Oxygen | 8 | 1.8 | |
| Corrosive | 2 | 0.46 |