| Time(minutes) | 
        Amount    of metal ion adsorbed (mg/g), qe | 
        Amount    of metal ion adsorbed (mg/g), | 
        Amount    of metal ion adsorbed (mg/g), qe | 
       
      
        |   | 
        Ni(II) | 
        Cu(II) | 
        Zn(II) | 
       
      
        | 5 | 
        0.077 | 
        0.069 | 
        0.069 | 
       
      
        | 10 | 
        0.078 | 
        0.071 | 
        0.071 | 
       
      
        | 15 | 
        0.078 | 
        0.071 | 
        0.071 | 
       
      
        | 20 | 
        0.079 | 
        0.072 | 
        0.071 | 
       
      
        | 25 | 
        0.080 | 
        0.073 | 
        0.072 | 
       
      
        | 30 | 
        0.080 | 
        0.073 | 
        0.073 | 
       
      
        | 40 | 
        0.081 | 
        0.074 | 
        0.074 | 
       
      
        | 50 | 
        0.082 | 
        0.074 | 
        0.074 | 
       
     
    (Mass of biomass 5g, temperature 25°C, pH 5.0, concentration 10mg/1, volume
    50ml) |