The use of waste basic oxygen furnace slag and hydrogen peroxide to degrade 4-chlorophenol
Journal Article
·
· Waste Management
A new treatment method is developed to degrade 4-chlorophenol (4-cp) and its oxidation intermediates. The experimental results of this research demonstrate that 4-cp and its oxidation intermediates can be decomposed completely by basic oxygen furnace slag (BOF slag) with hydrogen peroxide (H{sub 2}O{sub 2}) in an acid solution. The factors that effect the treatment efficiency were studied including initial concentration of 4-cp, pH of the solution, concentration of H{sub 2}O{sub 2} and amount of BOF slag. The BOF slags are final waste materials in the steel making process. The major components of BOF slag are CaO, SiO{sub 2}, Fe{sub 2}O{sub 3}, FeO, MgO and MnO. As the BOF slag in an acid solution; FeO and Fe{sub 2}O{sub 3} can be dissociated to produce ferrous ion and ferric ion. Ferrous ion reacts with hydrogen peroxide to form ``Fenton's reagent'' which can produce hydroxyl radicals (OH). Hydroxyl radical possession of high oxidation ability can oxidize organic chemicals effectively. Results show that 100 mg/l of 4-cp is decomposed completely within 30 min by 439.7 g/l BOF slag with 9.2 mM hydrogen peroxide in pH = 2.8{+-}0.2 solution. The COD value of the solution is reduced from 290 to 90 mg/l. The factors studied which affect the 4-cp decomposition efficiency were the hydrogen peroxide concentration, BOF slag concentration, pH of the solution and initial concentration of 4-cp. Because large amounts of Fe{sub 2}O{sub 3} and FeO are present in the BOF slag, the BOF slag not only has a high treatment efficiency, but also can be used repeatedly.
- Research Organization:
- National I-Lan Inst. of Tech., I-Lan (TW)
- OSTI ID:
- 20018993
- Journal Information:
- Waste Management, Journal Name: Waste Management Journal Issue: 7-8 Vol. 19; ISSN WAMAE2; ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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