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Table 1

Separation properties of three kinds of nanofiltration membranes for inorganic salts and dyes

Type of nanofiltration membraneNaCla solution
Na2SO4a solution
MgSO4a solution
Methyl Orangea solution
Methyl Bluea solution
Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)
BC-NFM 13.12 34.90 10.32 68.42 10.87 67.54 12.31 93.01 10.12 98.91 
BC/CS-NFM 13.51 34.42 12.12 67.71 12.43 66.83 13.64 92.37 12.37 98.79 
IP-BC/CS-NFM 15.64 40.26 13.56 71.34 14.03 62.55 13.28 93.65 12.35 98.86 
Type of nanofiltration membraneNaCla solution
Na2SO4a solution
MgSO4a solution
Methyl Orangea solution
Methyl Bluea solution
Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)Water fluxb (L/m2 h)Rejection rate (%)
BC-NFM 13.12 34.90 10.32 68.42 10.87 67.54 12.31 93.01 10.12 98.91 
BC/CS-NFM 13.51 34.42 12.12 67.71 12.43 66.83 13.64 92.37 12.37 98.79 
IP-BC/CS-NFM 15.64 40.26 13.56 71.34 14.03 62.55 13.28 93.65 12.35 98.86 

aTested with de-ionized water containing 500 mg/L salt or 100 mg/L dye under 0.5 MPa and room temperature.

bTested with a salt or dye aqueous solution under 0.5 MPa and room temperature.

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