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Pretreatment of printing and dyeing wastewater by Fe/C micro-electrolysis combined with H2O2 process
- Source :
- Water Science and Technology. 2017:707-717
- Publication Year :
- 2018
- Publisher :
- IWA Publishing, 2018.
-
Abstract
- A novel iron-carbon (Fe/C) micro-electrolysis combined with H2O2 (ICMH) process was proposed to pretreat the printing and dyeing wastewater (PDW), using a micro-electrolysis filling. The effects of H2O2 concentration, reaction time, initial pH, and Fe/C dosage on chemical oxygen demand (COD) removal rate of PDW were optimized by response surface methodology (RSM). The maximum COD removal rate was approximately 77.65% after 186 min treatment, when the concentration of H2O2, initial pH and the dosage of Fe/C were 8.88 g/L, 1.5 and 837 g/L, respectively. Analysis of variance (ANOVA) showed a high coefficient of determination value (R2 = 0.9780). And H2O2 concentration and initial pH were the key factors to improve the treatment effect. UV-Vis spectra indicated that a significant blue shift at 220 nm, attributing that fused aromatic hydrocarbons were degraded effectively. 3D-EEM spectra analysis showed that the water samples of PDW mainly contained three kinds of organic matter: refractory fulvic acid, soluble microbial metabolites and aromatic proteins, and the degradation rate of these was 81.76%, 53.78% and 70.83%, respectively.
- Subjects :
- chemistry.chemical_classification
021110 strategic, defence & security studies
Electrolysis
Environmental Engineering
Chemical oxygen demand
0211 other engineering and technologies
chemistry.chemical_element
02 engineering and technology
Biological Oxygen Demand Analysis
010501 environmental sciences
01 natural sciences
law.invention
chemistry
law
Degradation (geology)
Organic matter
Response surface methodology
Carbon
0105 earth and related environmental sciences
Water Science and Technology
Nuclear chemistry
Waste disposal
Subjects
Details
- ISSN :
- 19969732 and 02731223
- Volume :
- 2017
- Database :
- OpenAIRE
- Journal :
- Water Science and Technology
- Accession number :
- edsair.doi...........5448218575f60b4ee7d09d5e0229b16a