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Fenton-driven chemical regeneration of MTBE-spent GAC.
Water Res. 2005 May; 39(10):2145-53.WR

Abstract

Methyl tert-butyl ether (MTBE)-spent granular activated carbon (GAC) was chemically regenerated utilizing the Fenton mechanism. Two successive GAC regeneration cycles were performed involving iterative adsorption and oxidation processes: MTBE was adsorbed to the GAC, oxidized, re-adsorbed, oxidized, and finally re-adsorbed. Oxidant solutions comprised of hydrogen peroxide (H2O2) (1.7-2.0%) and FeSO4 x 7H2O (3 g/L) (pH 2.5), were recirculated through the GAC column (30% bed expansion). The regeneration efficiency after two full cycles of treatment was calculated to be 91%. The cost of H2O2 was 0.59 dollars/kg GAC (0.27 dollars/lb) per regeneration cycle. There was no loss of sorptive capacity. Small reductions in carbon surface area and pore volume were measured. The lack of carbon deterioration under aggressive oxidative conditions was attributed to the oxidation of the target contaminants relative to the oxidation of carbon surfaces. The reaction byproducts from MTBE oxidation, tertiary butanol and acetone, were also degraded and did not accumulate significantly on the GAC. Excessive accumulation of Fe on the GAC and consequent interference with MTBE sorption and carbon regeneration was controlled by monitoring and adjusting Fe in the oxidative solution.

Authors+Show Affiliations

US Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, P.O. Box 1198, Ada, OK 74820, USA. huling.scott@epa.govNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

15885738

Citation

Huling, Scott G., et al. "Fenton-driven Chemical Regeneration of MTBE-spent GAC." Water Research, vol. 39, no. 10, 2005, pp. 2145-53.
Huling SG, Jones PK, Ela WP, et al. Fenton-driven chemical regeneration of MTBE-spent GAC. Water Res. 2005;39(10):2145-53.
Huling, S. G., Jones, P. K., Ela, W. P., & Arnold, R. G. (2005). Fenton-driven chemical regeneration of MTBE-spent GAC. Water Research, 39(10), 2145-53.
Huling SG, et al. Fenton-driven Chemical Regeneration of MTBE-spent GAC. Water Res. 2005;39(10):2145-53. PubMed PMID: 15885738.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Fenton-driven chemical regeneration of MTBE-spent GAC. AU - Huling,Scott G, AU - Jones,Patrick K, AU - Ela,Wendell P, AU - Arnold,Robert G, PY - 2003/12/19/received PY - 2004/10/12/revised PY - 2005/03/08/accepted PY - 2005/5/12/pubmed PY - 2005/10/28/medline PY - 2005/5/12/entrez SP - 2145 EP - 53 JF - Water research JO - Water Res VL - 39 IS - 10 N2 - Methyl tert-butyl ether (MTBE)-spent granular activated carbon (GAC) was chemically regenerated utilizing the Fenton mechanism. Two successive GAC regeneration cycles were performed involving iterative adsorption and oxidation processes: MTBE was adsorbed to the GAC, oxidized, re-adsorbed, oxidized, and finally re-adsorbed. Oxidant solutions comprised of hydrogen peroxide (H2O2) (1.7-2.0%) and FeSO4 x 7H2O (3 g/L) (pH 2.5), were recirculated through the GAC column (30% bed expansion). The regeneration efficiency after two full cycles of treatment was calculated to be 91%. The cost of H2O2 was 0.59 dollars/kg GAC (0.27 dollars/lb) per regeneration cycle. There was no loss of sorptive capacity. Small reductions in carbon surface area and pore volume were measured. The lack of carbon deterioration under aggressive oxidative conditions was attributed to the oxidation of the target contaminants relative to the oxidation of carbon surfaces. The reaction byproducts from MTBE oxidation, tertiary butanol and acetone, were also degraded and did not accumulate significantly on the GAC. Excessive accumulation of Fe on the GAC and consequent interference with MTBE sorption and carbon regeneration was controlled by monitoring and adjusting Fe in the oxidative solution. SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/15885738/Fenton_driven_chemical_regeneration_of_MTBE_spent_GAC_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(05)00125-9 DB - PRIME DP - Unbound Medicine ER -