4.1 Article

COD Removal from High Salinity Petrochemical Wastewater Using Photo-assisted Peroxi-coagulation

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CROATIAN SOC CHEMICAL ENGINEERING TECHNOLOGY
DOI: 10.15255/CABEQ.2017.1268

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photo-assisted peroxi-coagulation; Fenton oxidation; high salinity wastewater; petrochemical industries; degradation

资金

  1. Ahvaz Jundishapur University of Medical Sciences
  2. [ETRC9519]

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Photo-assisted peroxi-coagulation (PPC) was investigated for treatment of high TDS (total dissolved solids) wastewater. The most important characteristics of the studied wastewater were high TDS of around 16428 mg L-1 and BOD5/COD ratio of 0.07. Effective operating parameters, including initial pH values of 3-8, reaction time of 60-240 min, electrode distance values of 2-6 cm, and voltage values of 0.5-3 V were investigated in batch mode experiments. Optimum conditions were obtained at pH = 3, voltage = 1.5 V, electrode distance = 2 cm, and reaction time = 420 min, corresponding to 89.44 % COD removal, which meets the Iran environmental discharge legislation (COD = 100 mg L-1). Kinetic analysis showed that pseudo first-order kinetic model was best fitted (R-2 = 0.97). GC mass chromatograms before and after treatment showed degradation of complex compounds to more simple constituents.

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