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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
  1. * Due to the two or multiple themes of some articles, each of the research topics is more than the full range of articles related to the physical and chemical properties of water