Selective Oxidative Degradation of Toluene for the Recovery of Surfactant by An

Supplementary Material

Selective oxidative degradation of toluene for the recovery of surfactant by an electro/Fe2+/persulfate process

Anhua Long1, 2,Hui Zhang,1,

1Department of Environmental Engineering, WuhanUniversity, Wuhan, 430079, China

2Jiangxi Science and Technology Normal University, Jiangxi, 330013, China

*Author to whom correspondence should be addressed.

Tel.: + 862768775837;fax: + 862768778893; E-mail address:(Hui Zhang).

Table SM-1 Parameters and linearly dependent coefficients for kinetics models (C0= 1 mm, [persulfate] = 30 mm, [Fe2+] = 10 mm)

Kinetic model / Pseudo-first-order / Pseudo-second-order
SDS concentration / k1 (10-3)/min1 / R2 / k2 (10-3)/L mg1min1 / R2
0.5% / 180.83 / 0.8066 / 11.54 / 0.9893
1% / 110.1 / 0.8532 / 8.28 / 0.9924
2% / 65.02 / 0.8035 / 3.02 / 0.9830

Table SM-2 Parameters and linearly dependent coefficients for kinetics models (C0= 1 mm, [persulfate] = 20 mm, [SDS] = 2%)

Kinetic model / Pseudo-first-order / Pseudo-second-order
Fe2+ concentration / k1 (10-4)/min1 / R2 / k2 (10-4)/L mg1min1 / R2
0 mM / 162.3 / 0.9536 / 2.33 / 0.9816
2 mM / 317.9 / 0.9098 / 6.37 / 0.9808
5 mM / 445.8 / 0.9564 / 11.0 / 0.9920
10 mM / 559.7 / 0.9353 / 17.9 / 0.9683
20 mM / 604.5 / 0.8802 / 23.2 / 0.9881

Figure SM-1Main effects plot for rate constants (A: SDS concentration; B:persulfate concentration; C: Fe2+ concentration).

Figure SM-2Interaction plots for rate constants(A: SDS concentration; B:persulfate concentration; C: Fe2+ concentration).

Figure SM-3The internally studentized residuals and normal % probability plot for rate constants.

Figure SM-4Residuals vs. Predicted plot for rate constants.

Figure SM-5The influence of different process on the toluene degradation in flushing effluents (C0= 1 mm, [SDS] = 2%, [Fe2+] = 8.1 mm, [persulfate] = 27.3 mm).