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Table 5

Pearson's correlation between physicochemical parameters at intake and output of Kafr El-Shinawy drinking-water treatment plant – Damietta

TemperatureTurbiditypHECAlkalinityDOBODSiAmmoniaNitriteNitrateTotal-NOrtho-PTotal-PFeMnZnCuCrCoCdNiPb
Temperature                       
Turbidity 0.319                      
pH 0.667** 0.818**                     
EC 0.755** 0.175 0.600**                    
Alkalinity 0.788** 0.574** 0.859** 0.858**                   
DO 0.502* 0.860** 0.871** 0.437* 0.650**                  
BOD 0.517** 0.929** 0.866** 0.337 0.655** 0.870**                 
Si 0.032 0.224 0.037 0.545** 0.323 0.004 0.222                
Ammonia 0.015 0.906** 0.584** 0.141 0.269 0.638** 0.818** 0.469*               
Nitrite 0.190 0.728** 0.397 0.238 0.114 0.424* 0.643** 0.511* 0.928**              
Nitrate 0.051 0.930** 0.633** 0.085 0.325 0.686** 0.842** 0.423* 0.996** 0.916**             
Total-N 0.150 0.968** 0.718** 0.014 0.415* 0.780** 0.899** 0.354 0.974** 0.864** 0.988**            
Ortho-P 0.113 0.959** 0.689** 0.010 0.394 0.747** 0.882** 0.356 0.983** 0.883** 0.993** 0.998**           
Total-P 0.188 0.969** 0.717** 0.029 0.417* 0.794** 0.919** 0.353 0.965** 0.832** 0.976** 0.993** 0.989**          
Fe 0.132 0.477* 0.020 0.644** 0.230 0.115 0.202 0.349 0.585** 0.499* 0.566** 0.517** 0.534** 0.499*         
Mn 0.195 0.744** 0.906** 0.701** 0.818** 0.915** 0.851** 0.119 0.511* 0.361 0.564** 0.661** 0.631** 0.671** 0.205        
Zn 0.062 0.597** 0.540** 0.313 0.395 0.696** 0.649** 0.158 0.561** 0.555** 0.596** 0.635** 0.631** 0.635** 0.054 0.721**       
Cu 0.385 0.372 0.656** 0.667** 0.640** 0.637** 0.604** 0.108 0.138 0.040 0.169 0.264 0.221 0.306 0.483* 0.760** 0.293      
Cr 0.265 0.088 0.113 0.369 0.149 0.128 0.055 0.459* 0.087 0.050 0.061 0.050 0.044 0.089 0.494* 0.292 0.553** 0.956**     
Co 0.440* 0.121 0.194 0.326 0.213 0.203 0.125 0.381 0.172 0.368 0.202 0.202 0.214 0.153 0.901** 0.381 0.683* 0.087 0.857**    
Cd 0.062 0.930** 0.632** 0.018 0.398 0.701** 0.808** 0.311 0.920** 0.796** 0.936** 0.938** 0.938** 0.926** 0.112 0.565** 0.503* 0.183 0.195 0.103   
Ni 0.335 0.672** 0.319 0.268 0.154 0.350 0.409* 0.114 0.676** 0.579** 0.685** 0.666** 0.678** 0.639** 0.851** 0.134 0.180 0.295 0.312 0.029 0.777**  
Pb 0.071 0.464* 0.137 0.320 0.035 0.075 0.391 0.524** 0.670** 0.721** 0.632** 0.562** 0.586** 0.569** 0.521** 0.026 0.087 0.140 0.360 0.023 0.557** 0.504* 
TemperatureTurbiditypHECAlkalinityDOBODSiAmmoniaNitriteNitrateTotal-NOrtho-PTotal-PFeMnZnCuCrCoCdNiPb
Temperature                       
Turbidity 0.319                      
pH 0.667** 0.818**                     
EC 0.755** 0.175 0.600**                    
Alkalinity 0.788** 0.574** 0.859** 0.858**                   
DO 0.502* 0.860** 0.871** 0.437* 0.650**                  
BOD 0.517** 0.929** 0.866** 0.337 0.655** 0.870**                 
Si 0.032 0.224 0.037 0.545** 0.323 0.004 0.222                
Ammonia 0.015 0.906** 0.584** 0.141 0.269 0.638** 0.818** 0.469*               
Nitrite 0.190 0.728** 0.397 0.238 0.114 0.424* 0.643** 0.511* 0.928**              
Nitrate 0.051 0.930** 0.633** 0.085 0.325 0.686** 0.842** 0.423* 0.996** 0.916**             
Total-N 0.150 0.968** 0.718** 0.014 0.415* 0.780** 0.899** 0.354 0.974** 0.864** 0.988**            
Ortho-P 0.113 0.959** 0.689** 0.010 0.394 0.747** 0.882** 0.356 0.983** 0.883** 0.993** 0.998**           
Total-P 0.188 0.969** 0.717** 0.029 0.417* 0.794** 0.919** 0.353 0.965** 0.832** 0.976** 0.993** 0.989**          
Fe 0.132 0.477* 0.020 0.644** 0.230 0.115 0.202 0.349 0.585** 0.499* 0.566** 0.517** 0.534** 0.499*         
Mn 0.195 0.744** 0.906** 0.701** 0.818** 0.915** 0.851** 0.119 0.511* 0.361 0.564** 0.661** 0.631** 0.671** 0.205        
Zn 0.062 0.597** 0.540** 0.313 0.395 0.696** 0.649** 0.158 0.561** 0.555** 0.596** 0.635** 0.631** 0.635** 0.054 0.721**       
Cu 0.385 0.372 0.656** 0.667** 0.640** 0.637** 0.604** 0.108 0.138 0.040 0.169 0.264 0.221 0.306 0.483* 0.760** 0.293      
Cr 0.265 0.088 0.113 0.369 0.149 0.128 0.055 0.459* 0.087 0.050 0.061 0.050 0.044 0.089 0.494* 0.292 0.553** 0.956**     
Co 0.440* 0.121 0.194 0.326 0.213 0.203 0.125 0.381 0.172 0.368 0.202 0.202 0.214 0.153 0.901** 0.381 0.683* 0.087 0.857**    
Cd 0.062 0.930** 0.632** 0.018 0.398 0.701** 0.808** 0.311 0.920** 0.796** 0.936** 0.938** 0.938** 0.926** 0.112 0.565** 0.503* 0.183 0.195 0.103   
Ni 0.335 0.672** 0.319 0.268 0.154 0.350 0.409* 0.114 0.676** 0.579** 0.685** 0.666** 0.678** 0.639** 0.851** 0.134 0.180 0.295 0.312 0.029 0.777**  
Pb 0.071 0.464* 0.137 0.320 0.035 0.075 0.391 0.524** 0.670** 0.721** 0.632** 0.562** 0.586** 0.569** 0.521** 0.026 0.087 0.140 0.360 0.023 0.557** 0.504* 

**Statistically significant correlation at p < 0.01, *Statistically, significant correlation at p < 0.05.

Bold numbers indicate a negative correlation.

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