In this study, chemical oxidation tests using H(2)O(2) were performed on a solution contaminated with 100 mg l(-1) of pentachlorophenol (PCP). The effectiveness of electric arc furnace dust and hematite as heterogeneous catalysts was evaluated. Reactions were conducted at pH 2 for 24 h. Either H(2)O(2) stabilized with KH(2)PO(4) or un-stabilized H(2)O(2) was used. Total organic carbon (T.O.C.) removal and chloride release from PCP molecule were monitored. Results showed that the maximum removal yields for electric arc furnace (EAF) dust (49.2% T.O.C., 56.7% CI) were achieved when H(2)O(2):PCP ratio was 10: 1 and Fe:H(2)O(2) = 1:5 for unstabilized H(2)O(2) and when H(2)O(2):PCP = 10:1 and Fe:H(2)O(2) = 1:1 for stabilized H(2)O(2) (48% T.O.C., 60.6% CI). The maximum yield using hematite (45.2% T.O.C., 55.2% CI) was obtained when H(2)O(2):PCP ratio was 10:1 and Fe:H(2)O(2) was 1:2. When EAF dust was used and Fe:H(2)O(2) > 1:5, CI release was higher than the one expected from T.O.C. removal. (c) 2006 Elsevier B.V. All rights reserved.
Use of EAF dust as heterogeneous catalyst in Fenton oxidation of PCP contaminated wastewaters / Mecozzi, Roberta; DI PALMA, Luca; Pilone, Daniela; L., Cerboni. - In: JOURNAL OF HAZARDOUS MATERIALS. - ISSN 0304-3894. - ELETTRONICO. - 137:2(2006), pp. 886-892. [10.1016/j.jhazmat.2006.03.002]
Use of EAF dust as heterogeneous catalyst in Fenton oxidation of PCP contaminated wastewaters
MECOZZI, ROBERTA;DI PALMA, Luca;PILONE, Daniela;
2006
Abstract
In this study, chemical oxidation tests using H(2)O(2) were performed on a solution contaminated with 100 mg l(-1) of pentachlorophenol (PCP). The effectiveness of electric arc furnace dust and hematite as heterogeneous catalysts was evaluated. Reactions were conducted at pH 2 for 24 h. Either H(2)O(2) stabilized with KH(2)PO(4) or un-stabilized H(2)O(2) was used. Total organic carbon (T.O.C.) removal and chloride release from PCP molecule were monitored. Results showed that the maximum removal yields for electric arc furnace (EAF) dust (49.2% T.O.C., 56.7% CI) were achieved when H(2)O(2):PCP ratio was 10: 1 and Fe:H(2)O(2) = 1:5 for unstabilized H(2)O(2) and when H(2)O(2):PCP = 10:1 and Fe:H(2)O(2) = 1:1 for stabilized H(2)O(2) (48% T.O.C., 60.6% CI). The maximum yield using hematite (45.2% T.O.C., 55.2% CI) was obtained when H(2)O(2):PCP ratio was 10:1 and Fe:H(2)O(2) was 1:2. When EAF dust was used and Fe:H(2)O(2) > 1:5, CI release was higher than the one expected from T.O.C. removal. (c) 2006 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
