A combined electrocoagulation-sorption process applied to mixed industrial wastewater.
The removal of organic pollutants from a highly complex industrial wastewater by a aluminium electrocoagulation process coupled with biosorption was evaluated. Under optimal conditions of pH 8 and 45.45 Am(-2) current density, the electrochemical method yields a very effective reduction of all organic pollutants, this reduction was enhanced when the biosorption treatment was applied as a polishing step. Treatment reduced chemical oxygen demand (COD) by 84%, biochemical oxygen demand (BOD(5)) by 78%, color by 97%, turbidity by 98% and fecal coliforms by 99%. The chemical species formed in aqueous solution were determined. The initial and final pollutant levels in the wastewater were monitored using UV-vis spectrometry and cyclic voltammetry. Finally, the morphology and elemental composition of the biosorbent was characterized with scanning electron microscopy (SEM) and energy dispersion spectra (EDS).
Linares-Hernández
Ivonne
I
Universidad Autónoma del Estado de México, Facultad de Química, Paseo Colón intersección Paseo Tollocan S/N, C.P. 50120, Toluca, Estado de México, Mexico.
Barrera-Díaz
Carlos
C
Roa-Morales
Gabriela
G
Bilyeu
Bryan
B
Ureña-Núñez
Fernando
F
D000327:Adsorption; D000535:Aluminum / Q000737:chemistry; D003116:Color; D004563:Electrochemistry; D004755:Enterobacteriaceae / Q000302:isolation & purification; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D009391:Nephelometry and Turbidimetry; D029747:Opuntia; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000737:chemistry*
D007220:Industrial Waste; D014873:Water Pollutants; D000535:Aluminum