Relevance of Toxicity Assessment in Wastewater Treatments: Case Study—Four Fenton Processes Applied to the Mineralization of C.I. Acid Red 14

Table 1

Results for the mineralization and toxicity tests.

Sample	TOC	EC50	TII50 (Equitox/m^3)	Blank TII50
Fe^3+/H2O2	73 ± 7%	Nontoxic
Fe^2+/H2O2	91 ± 4%	6 ± 3%	20 ± 11	28
Fe(III)-zeolite Y/H2O2	86 ± 1%	2.3 ± 0.3%	45 ± 6	48
Fe(II)-zeolite Y/H2O2	84 ± 6%	24 ± 8%	4 ± 1	7