Heterogeneous fenton oxidation process using natural martite and hydrogen peroxide for treatment of color in water

Rahmani, Amir
The current study aims to investigate removal of a triarylmethane dye called Acid Blue 5 (AB5) via heterogeneous Fenton-like process and compare it with its homogeneous counterpart. The heterogeneous and homogeneous catalysts used were martite and FeCl3.6H2O, respectively. The unmilled martite microparticles were processed with high energy planetary ball mill to form nanosized catalyst for heterogeneous Fentonlike process. Characterization was performed by SEM, EDX, X-ray dot mapping, BET, XRD, FT-IR, petrography and point of zero charge analyses. Among the three batches of martite nanoparticles formed with milling time of 1 h, 3 h and 5 h at the milling speed of 300 rpm, the catalytic performance of 5h milled nano-sized martite (19.23 m2/g of surface area) was the highest. The influence of initial pH, catalyst dosage, H2O2, initial dye concentration and scavengers on the AB5 degradation was investigated comparatively for heterogeneous and homogeneous processes. AB5 removal efficiency in heterogeneous system was either higher or the same as the homogeneous system in each case. AB5 degradation followed pseudo-first order kinetic for both processes, where 0.096 min-1 and 0.0622 min-1 were calculated as the highest rates for heterogeneous and homogeneous processes, respectively. Various degradation intermediates from heterogeneous process were identified by GC-MS. Reuse of martite in five consecutive cycles did not significantly affect performance. Environment-friendly production of martite nanoparticles, high performance, reusability and low leaching of iron present important advantages of the martite nanocatalyst. Finally, an artificial neural network was expanded to estimate AB5 degradation efficiency with satisfactory results.


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Dindarsafa, Mahsa; İmamoğlu, İpek; Khataee, Alireza; Department of Environmental Engineering (2017)
This study aims to investigate the removal efficiency of an organic dye, Acid Blue 92 (AB92), using heterogeneous sono-Fenton-like process and compare it with its homogeneous counterpart. High energy planetary ball milling was applied to prepare sono-Fenton nanocatalyst from natural martite. The unmilled and ball milled samples were characterized by XRD, FT-IR, SEM, EDX and BET analyses. The catalytic performance of the 6h ball milled martite was the best for removal of AB92 in heterogeneous sono-Fenton-lik...
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In this study, anaerobic treatment of synthetic textile wastewater containing a reactive azo dye, namely, Remazol Brilliant Violet 5R, was investigated. A fluidized bed reactor (FBR) was used in the study. Before the operation period, start-up of the FBR was completed in 128 days with an immobilized microorganism level of 0.069 g volatile suspended solids per g support material (pumice). Anaerobic treatment of synthetic textile wastewater revealed that 300 mg/L dye was removed in the FBR system. Chemical ox...
Sequential Anaerobic Aerobic biological treatment of Dalaman SEKA Pulp and Paper Industry effluent
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In the pulp and paper industry, lignin and other color compounds are removed by chemical agents in bleaching process. Use of chlorine-based agents results in production of degradation products which include various chloro-organic derivatives. Since these new compounds are highly chlorinated, they cause a problem in the treatment of pulp and paper industry wastewaters. Chemical precipitation, lagooning, activated sludge, and anaerobic treatment are the processes used for treating pulp and paper effluents. Fu...
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This research is focused on the integrated process for the treatment of bleached Kraft pulp mill effluents. Pre-ozonation of softwood and hardwood combined bleaching effluents at alkaline pH resulted in 50 and 44% COD abatement, respectively. Segregation of highly polluted streams of bleaching process can be recommended to reduce the cost of treatment since the COD removal yield of CEH effluents was higher than combined bleaching effluents. Moreover, biodegradability of CEH effluents in terms of BOD5/COD ra...
Merits of ozonation and catalytic ozonation pre-treatment in the algal treatment of pulp and paper mill effluents
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Since the performance of algal treatment for pulp mill effluent decreases with increasing color intensity and AOX content, which mainly originate from the chlorine bleaching of Kraft pulp, the separated CEH bleaching effluent was pre-treated by both the conventional and the heterogeneous catalytic ozonation processes. An increase in the BOD5/COD, ratio from 0.11 to 0.28 and 87% color abatement in terms of Pt-Co were achieved by catalytic ozonation, which had the best treatment performance. Biodegradability ...
Citation Formats
A. Rahmani, “Heterogeneous fenton oxidation process using natural martite and hydrogen peroxide for treatment of color in water,” M.S. - Master of Science, Middle East Technical University, 2017.