FeSO4 center dot 7H(2)O was dissolved in a 3.75% model wastewater contg. (1.25% of each) coconut oil fatty acids diethanolamide R-CON-(CH2CH2OH)(2) (R = C-12-C-18), ethoxylated lauryl (alkyl) Na sulfate CH3-(CH2)(n)-(O-CH2-CH2)(p)-OSO3-Na (n = 9-15, p = 2), and tetrasodium versenate. The mixt. was adjusted with HCl to pH 2, treated with 30% H2O2, with NaOH to pH 12, decanted in 24 hrs., and filtered. Optimum sulfate and peroxide amts. were 230 cm(3) and 130 g per 0.5 l. wastewater. COD, 35300 mg O-2/l., was reduced in 92%. The treatment made wastewater more apt. to biodegrade, BOD/COD similar to 0.6 vs. the original 0.2. Anionics fell below 2% of the original amt., chlorides rose by a factor of 2.5. The resulting Fe(OH)(3) sorbed original contaminants and their oxidates. Organics desorbed easily and were as biodegradable as the starting wastewater.