Application of Fenton's reagent as a polishing step for removal of UV quenching organic constituents in biologically treated landfill leachates.
When landfill leachate, with or without biological pretreatment, is discharged to publically owned treatment works (POTWs), it can interfere with the installed treatment facilities. Biological treatment is ineffective for the removal of some of the bio-refractory organic matter, including UV₂₅₄ quenching substances. Fenton's reagent treatment for biologically treated landfill leachates is examined in this study as a polishing step to make landfill leachates acceptable to POTWs. The optimum conditions for the Fenton's reagent treatment are explored. The molecular weight and hydrophobic-hydrophilic nature based fractions of the Fenton's treated leachate samples are analyzed to provide insight into the leachate fractions targeted by the Fenton's reagent. The results indicate that Fenton's reagent can act as a good compliment to biological treatment as it can remove leachate fractions which are widely considered to be bio-refractory. It exhibited good UV₂₅₄ absorbance removal by removing larger molecular weight humic substances and thus, can help solve the UV₂₅₄ quenching problem due to leachates discharged to POTWs.
Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061, USA. Electronic address: abhinavg@vt.edu.
Abhinav
A
Gupta
Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061, USA; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Renzun
R
Zhao
Department of Civil and Environmental Engineering, Virginia Tech, Blacksburg, VA 24061, USA.
John T
JT
Novak
Alternative Natural Technologies Inc., Blacksburg, VA 24060, USA.
C
C
Douglas Goldsmith
D001578:Benzopyrans / Q000032:analysis; D019149:Bioreactors; D002244:Carbon / Q000032:analysis; D006812:Humic Substances / Q000032:analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D014466:Ultraviolet Rays; D064091:Waste Disposal Facilities; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D001578:Benzopyrans; C045076:Fenton's reagent; D006812:Humic Substances; D014874:Water Pollutants, Chemical; D002244:Carbon; D006861:Hydrogen Peroxide; D007501:Iron; C005023:fulvic acid
Fenton’s treatment; Hydrophobic–hydrophilic nature; Landfill leachate; Molecular weight distribution; UV(254) absorbance