Table 1.

Viscosity stability data of polymeric surfactants made with wastewater.

Sample Name	Concentration mg/L	Viscosity (mPa·s)
		0 d	1 d	3 d	7 d	15 d	30 d	45 d	60 d
PD type	1200	454	737	724	683	747	767	695	680
DW type	1200	206	248	288	356	365	271	245	241
LR type	1200	114	134	163	178	219	143	112	125