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Organics removal and in-situ granule activated carbon regeneration in FBR-Fenton/GAC process for reverse osmosis concentrate treatment
- Source :
- Water Research. 183:116119
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Fluidized bed reactor Fenton (FBR-Fenton) process was adopted for reverse osmosis concentrate (ROC) treatment with three types of carriers, including sand, zeolite and granular activated carbon (GAC). Adsorption studies demonstrated that GAC achieved the best adsorption performance (maximum COD removal of 78% in 15 h) among the three carriers, and the adsorption of ROC organic matters followed a two-stage adsorption model. Fenton oxidations were carried out in three fluidized beds after column saturation, and FBR-Fenton/GAC process achieved highest COD removal (72%) and most BOD5/COD ratio enhancement (from 0.03 to 0.3) in ROC. Long-term operation data demonstrated good performance stability of GAC as the carrier. In addition, GAC fluidized bed obtained highest total iron removal rate via iron crystallization process. Continuous in-situ GAC regeneration with more than 90% recoveries of surface area, pore volume and adsorption capacity were observed along the ROC treatment with FBR-Fenton/GAC process. Mechanism studies revealed that better COD removal performance in FBR-Fenton/GAC process was attributed to the combining effects of homogenous Fenton reaction, GAC adsorption and GAC/H2O2 catalytic reaction.
- Subjects :
- inorganic chemicals
Osmosis
Environmental Engineering
0208 environmental biotechnology
02 engineering and technology
010501 environmental sciences
01 natural sciences
Catalysis
Adsorption
medicine
Zeolite
Reverse osmosis
Waste Management and Disposal
0105 earth and related environmental sciences
Water Science and Technology
Civil and Structural Engineering
Chemistry
Ecological Modeling
Granule (cell biology)
Hydrogen Peroxide
Pollution
020801 environmental engineering
Chemical engineering
Fluidized bed
Charcoal
Saturation (chemistry)
Filtration
Water Pollutants, Chemical
Activated carbon
medicine.drug
Subjects
Details
- ISSN :
- 00431354
- Volume :
- 183
- Database :
- OpenAIRE
- Journal :
- Water Research
- Accession number :
- edsair.doi.dedup.....f75d6f84f843148d009b8d2cc6c994fe