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Environmental Systems Research

Table 5 Pearson’s correlation matrix of toxic elements, physicochemical and hydrochemical parameters of water samples along the Jimi River and its tributaries

From: Concentrations, hydrochemistry and risk evaluation of selected heavy metals along the Jimi River and its tributaries at Obuasi a mining enclave in Ghana

 

pH

CN−

S2 −

SO4 2−

NO3 −

NO2 −

Cd

Fe

Ni

As

Zn

Pb

NH3

Cond

Turb

Alky

HCO3 −

T.H

Ca.H

Mg.H

pH

1

                   

CN

 

1

                  

S2 −

  

1

                 

SO4 2−

   

1

                

NO3 −

  

0.937**

 

1

               

NO2 −

  

0.926**

 

0.992**

1

              

Cd

      

1

             

Fe

  

0.910**

 

0.978**

0.990**

 

1

            

Ni

0.992**

      

−0.154

1

           

As

         

1

          

Zn

 

−0.755*

0.801*

 

0.940**

0.945**

 

0.905**

  

1

         

Pb

  

0.930**

 

0.994**

1.000**

 

0.989**

  

0.944**

1

        

NH3

            

1

       

Cond

  

0.894**

 

0.945**

0.968**

 

0.962**

  

0.926**

0.967**

 

1

      

Turb

0.934**

       

0.922**

     

1

     

Alky

0.876**

       

0.901**

   

0.788*

 

0.793*

1

    

HCO3 −

0.888**

       

0.911**

   

0.775*

 

0.804*

1.000**

1

   

T.H

0.893**

       

0.919**

   

0.761*

 

0.794*

0.994**

0.996**

1

  

Ca.H

0.888**

       

0.916**

   

0.772*

 

0.791*

0.994**

0.995**

10.000**

1

 

Mg.H

0.925**

       

0.940**

     

0.816*

0.985**

0.989**

0.987**

0.984**

1

  1. Only values that are significant in the Pearson’s correlation analysis is indicated.
  2. T.H total hardness, Ca.H calcium hardness, Mg.H magnesium hardness, Cond conductivity, Turb turbidity, Alky alkalinity.
  3. ** Correlation is significant at the 0.01 level (2-tailed); * Correlation is significant at the 0.05 level (2-tailed).
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