mTX100	the bulk mass fraction of TX100 in the binary surfactants
α1	the bulk mole fraction of TX100 in the binary surfactants
β	surfactants interaction parameter
γ	surface tension (N/m)
CMC	critical micelle concentration (mol/L)
CMC1	the CMC value of TX100 (mol/L)
CMC2	the CMC value of rhamnolipids (mol/L)
CMC theor	the CMC value of ideal mixture surfactants (mol/L)
CMC exp	the CMC value of experimental mixture surfactants (mol/L)
$X_1$	the mole fraction of TX100 in the binary surfactants
$X_2$	the mole fraction of rhamnolipids in the binary surfactants
WSR exp	the weight solubilization ratio of experimental mixture surfactants
WSR theor	the weight solubilization ratio of deal mixture surfactants
Sac	the solubility of phenanthrene at a specified surfactant concentration (mg/L)
Scmc	the apparent solubility of phenanthrene at CMC (mg/L)
Csurf	surfactant concentration (mg/L)
Vw	the molar volume of water (L/mol)
Km	the partition of the organic compound between micelles and the aqueous phase
Km12	the micelle–water partition of the solute in mixed surfactants systems
Km1	the micelle–water partition of the solute in TX100
Km2	the micelle–water partition of the solute in rhamnolipids
ΔGs	the standard free energy change (J/mol)
R	the universal constant of the gas (J/(mol·K))
T	temperature (K)
B	an empirical parameter including inter-surfactant and surfactant-solute interaction
pKa	acidity coefficient