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Babak Kakavandi

My name is Babak Kakavandi. PhD of Environmental Health Engineering and an Assistant Professor in the Department of Environmental Health Engineering at Alborz University of Medical Sciences in Karaj, Iran.

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Papers by Babak Kakavandi

Research paper thumbnail of Bisphenol a degradation by peroxymonosulfate photo-activation coupled with carbon-based cobalt ferrite nanocomposite: Performance, upgrading synergy and mechanistic pathway

Research paper thumbnail of Acetaminophen removal from aqueous solutions through peroxymonosulfate activation by CoFe2O4/mpg-C3N4 nanocomposite: Insight into the performance and degradation kinetics

Environmental Technology & Innovation

Research paper thumbnail of Catalytic ozonation assisted by Fe3O4@SiO2@TiO2 in the degradation of Aniline from aqueous solution: modelling and optimisation by response surface methodology

International Journal of Environmental Analytical Chemistry

Research paper thumbnail of Sulfate radical-based oxidative degradation of acetaminophen over an efficient hybrid system: Peroxydisulfate decomposed by ferroferric oxide nanocatalyst anchored on activated carbon and UV light

Separation and Purification Technology

Research paper thumbnail of Intensified peroxydisulfate/microparticles-zero valent iron process through aeration for degradation of organic pollutants: Kinetic studies, mechanism and effect of anions

Journal of Water Process Engineering

Research paper thumbnail of Efficient nitrate adsorption from water by aluminum powder: kinetic, equilibrium and influence of anion competition studies

Environment Protection Engineering

The feasibility of aluminum powder (with particle size of 75-150 µm) for nitrate removal from aqu... more The feasibility of aluminum powder (with particle size of 75-150 µm) for nitrate removal from aqueous solutions has been investigated. Adsorption was examined in function of initial nitrate concentration, contact time, pH and influence of other interfering anions. Maximum nitrate removal occurred at equilibrium pH of 10. The kinetics of adsorption of nitrate ions was discussed based on three kinetic models, namely: the pseudo-first order, the pseudo-second order and the intraparticle diffusion model. The experimental data fitted the pseudo-second order kinetic model very well; the rate constant was 410-4 g/ (mg•min) at the concentration of 3 NO  of 100 mg/dm 3. The adsorption data followed both Langmuir (R 2 = 0.808) and Freundlich (R 2 = 0.865) isotherms probably due to the real heterogeneous nature of the surface sites involved in the nitrate uptake. The maximum sorption capacity of aluminum powder for nitrate adsorption was found to be ca. 45.2 mg/g at room temperature. The results indicate that aluminum powder is an interesting alternative for nitrate removal from the water.

Research paper thumbnail of Sono-photocatalytic degradation of tetracycline and pharmaceutical wastewater using WO3/CNT heterojunction nanocomposite under US and visible light irradiations: A novel hybrid system

Journal of Hazardous Materials

Research paper thumbnail of N, Cu co-doped TiO2@functionalized SWCNT photocatalyst coupled with ultrasound and visible-light: An effective sono-photocatalysis process for pharmaceutical wastewaters treatment

Chemical Engineering Journal

• N-Cu co-doped TiO 2 @CNTs was prepared , characterized and coupled with UV and US irradiations.... more • N-Cu co-doped TiO 2 @CNTs was prepared , characterized and coupled with UV and US irradiations. • Photocatalytic activity of TiO 2 was accelerated significantly after doping of N and Cu. • Catalyst was recyclable after six consecutive runs with an insignificant decrease in performance. • Under optimized conditions, the removal efficiencies of 100, 93 and 89% were obtained for SMXZ, COD and TOC, respectively. • Sono-photocatalysis process showed a good performance for treatment of real pharmaceutical wastewater. A B S T R A C T In this study, N-Cu co-doped TiO 2 was decorated on the single-walled carbon nano-tube (marked as N-Cu co-doped TiO 2 @CNTs) via two-step sol-gel/hydrothermal synthesis method for the first time as a novel photo-catalyst in coupling with ultrasound (US) waves. The catalyst properties were characterized via BET, Raman, FESEM, TEM, FTIR, XRD, EIS, PL, TGA, UV-Vis DRS, EDX and EDS dot mapping. These techniques confirmed the successful doping of both N and Cu elements on the CNTs impregnated with TiO 2 nanoparticles. The investigation of effective operational parameters demonstrated that the total removal of sulfamethoxazole (SMXZ) could be achieved under pH of 6.0, catalyst dosage of 0.8 g/L, light intensity of 200 W, US power of 200 W, and initial SMXZ concentration of 60 mg/L within 60 min. SMXZ degradation kinetics over sono-photocatalytic process were in a good agreement with pseudo-first-order model. Quenching experiments illustrated that HO • and O 2 •-active species were more effective species for SMXZ degradation. The synthesized sono-photocatalyst could be recycled after six consecutive cycles of SMXZ degradation with an insignificant decrease in perfor-https://doi. T mance. A tentative mechanism and pathway for SMXZ were formulated. Pharmaceutical wastewater was treated through the optimum degradation conditions which showed that the sono-photocatalytic degradation eliminated 93% of COD and 89% of TOC within 180 min.

Research paper thumbnail of Photo-assisted electroperoxone of 2,4-dichlorophenoxy acetic acid herbicide: Kinetic, synergistic and optimization by response surface methodology

Journal of Water Process Engineering

Research paper thumbnail of Efficient clean-up of waters contaminated with diazinon pesticide using photo-decomposition of peroxymonosulfate by ZnO decorated on a magnetic core/shell structure

Journal of Environmental Management

Research paper thumbnail of Ultrasound-assisted photocatalytic degradation of sulfadiazine using MgO@CNT heterojunction composite: Effective factors, pathway and biodegradability studies

Chemical Engineering Journal

Research paper thumbnail of Photo-assisted catalytic degradation of acetaminophen using peroxymonosulfate decomposed by magnetic carbon heterojunction catalyst

Research paper thumbnail of Preparation, characterization and catalytic potential of γ-Fe2O3@AC mesoporous heterojunction for activation of peroxymonosulfate into degradation of cyfluthrin insecticide

Microporous and Mesoporous Materials

Research paper thumbnail of Activation of peroxymonosulfate into amoxicillin degradation using cobalt ferrite nanoparticles anchored on graphene (CoFe2O4@Gr)

Research paper thumbnail of Heterogeneous sonocatalytic degradation of amoxicillin using ZnO@Fe 3 O 4 magnetic nanocomposite: Influential factors, reusability and mechanisms

Journal of Molecular Liquids

Research paper thumbnail of Efficient adsorption of cobalt on chemical modified activated carbon: characterization, optimization and modeling studies

DESALINATION AND WATER TREATMENT

Research paper thumbnail of Heterogeneous catalytic degradation of organic compounds using nanoscale zero-valent iron supported on kaolinite: Mechanism, kinetic and feasibility studies

Journal of the Taiwan Institute of Chemical Engineers

Research paper thumbnail of Photocatalytic degradation of rhodamine B and real textile wastewater using Fe-doped TiO2 anchored on reduced graphene oxide (Fe-TiO2/rGO): Characterization and feasibility, mechanism and pathway studies

Research paper thumbnail of Development of maghemite nanoparticles supported on cross-linked chitosan (γ-Fe2O3@CS) as a recoverable mesoporous magnetic composite for effective heavy metals removal

Journal of Molecular Liquids

Research paper thumbnail of Catalytic ozonation of high concentrations of catechol over TiO 2 @Fe 3 O 4 magnetic core-shell nanocatalyst: Optimization, toxicity and degradation pathway studies

Journal of Cleaner Production

Research paper thumbnail of Bisphenol a degradation by peroxymonosulfate photo-activation coupled with carbon-based cobalt ferrite nanocomposite: Performance, upgrading synergy and mechanistic pathway

Research paper thumbnail of Acetaminophen removal from aqueous solutions through peroxymonosulfate activation by CoFe2O4/mpg-C3N4 nanocomposite: Insight into the performance and degradation kinetics

Environmental Technology & Innovation

Research paper thumbnail of Catalytic ozonation assisted by Fe3O4@SiO2@TiO2 in the degradation of Aniline from aqueous solution: modelling and optimisation by response surface methodology

International Journal of Environmental Analytical Chemistry

Research paper thumbnail of Sulfate radical-based oxidative degradation of acetaminophen over an efficient hybrid system: Peroxydisulfate decomposed by ferroferric oxide nanocatalyst anchored on activated carbon and UV light

Separation and Purification Technology

Research paper thumbnail of Intensified peroxydisulfate/microparticles-zero valent iron process through aeration for degradation of organic pollutants: Kinetic studies, mechanism and effect of anions

Journal of Water Process Engineering

Research paper thumbnail of Efficient nitrate adsorption from water by aluminum powder: kinetic, equilibrium and influence of anion competition studies

Environment Protection Engineering

The feasibility of aluminum powder (with particle size of 75-150 µm) for nitrate removal from aqu... more The feasibility of aluminum powder (with particle size of 75-150 µm) for nitrate removal from aqueous solutions has been investigated. Adsorption was examined in function of initial nitrate concentration, contact time, pH and influence of other interfering anions. Maximum nitrate removal occurred at equilibrium pH of 10. The kinetics of adsorption of nitrate ions was discussed based on three kinetic models, namely: the pseudo-first order, the pseudo-second order and the intraparticle diffusion model. The experimental data fitted the pseudo-second order kinetic model very well; the rate constant was 410-4 g/ (mg•min) at the concentration of 3 NO  of 100 mg/dm 3. The adsorption data followed both Langmuir (R 2 = 0.808) and Freundlich (R 2 = 0.865) isotherms probably due to the real heterogeneous nature of the surface sites involved in the nitrate uptake. The maximum sorption capacity of aluminum powder for nitrate adsorption was found to be ca. 45.2 mg/g at room temperature. The results indicate that aluminum powder is an interesting alternative for nitrate removal from the water.

Research paper thumbnail of Sono-photocatalytic degradation of tetracycline and pharmaceutical wastewater using WO3/CNT heterojunction nanocomposite under US and visible light irradiations: A novel hybrid system

Journal of Hazardous Materials

Research paper thumbnail of N, Cu co-doped TiO2@functionalized SWCNT photocatalyst coupled with ultrasound and visible-light: An effective sono-photocatalysis process for pharmaceutical wastewaters treatment

Chemical Engineering Journal

• N-Cu co-doped TiO 2 @CNTs was prepared , characterized and coupled with UV and US irradiations.... more • N-Cu co-doped TiO 2 @CNTs was prepared , characterized and coupled with UV and US irradiations. • Photocatalytic activity of TiO 2 was accelerated significantly after doping of N and Cu. • Catalyst was recyclable after six consecutive runs with an insignificant decrease in performance. • Under optimized conditions, the removal efficiencies of 100, 93 and 89% were obtained for SMXZ, COD and TOC, respectively. • Sono-photocatalysis process showed a good performance for treatment of real pharmaceutical wastewater. A B S T R A C T In this study, N-Cu co-doped TiO 2 was decorated on the single-walled carbon nano-tube (marked as N-Cu co-doped TiO 2 @CNTs) via two-step sol-gel/hydrothermal synthesis method for the first time as a novel photo-catalyst in coupling with ultrasound (US) waves. The catalyst properties were characterized via BET, Raman, FESEM, TEM, FTIR, XRD, EIS, PL, TGA, UV-Vis DRS, EDX and EDS dot mapping. These techniques confirmed the successful doping of both N and Cu elements on the CNTs impregnated with TiO 2 nanoparticles. The investigation of effective operational parameters demonstrated that the total removal of sulfamethoxazole (SMXZ) could be achieved under pH of 6.0, catalyst dosage of 0.8 g/L, light intensity of 200 W, US power of 200 W, and initial SMXZ concentration of 60 mg/L within 60 min. SMXZ degradation kinetics over sono-photocatalytic process were in a good agreement with pseudo-first-order model. Quenching experiments illustrated that HO • and O 2 •-active species were more effective species for SMXZ degradation. The synthesized sono-photocatalyst could be recycled after six consecutive cycles of SMXZ degradation with an insignificant decrease in perfor-https://doi. T mance. A tentative mechanism and pathway for SMXZ were formulated. Pharmaceutical wastewater was treated through the optimum degradation conditions which showed that the sono-photocatalytic degradation eliminated 93% of COD and 89% of TOC within 180 min.

Research paper thumbnail of Photo-assisted electroperoxone of 2,4-dichlorophenoxy acetic acid herbicide: Kinetic, synergistic and optimization by response surface methodology

Journal of Water Process Engineering

Research paper thumbnail of Efficient clean-up of waters contaminated with diazinon pesticide using photo-decomposition of peroxymonosulfate by ZnO decorated on a magnetic core/shell structure

Journal of Environmental Management

Research paper thumbnail of Ultrasound-assisted photocatalytic degradation of sulfadiazine using MgO@CNT heterojunction composite: Effective factors, pathway and biodegradability studies

Chemical Engineering Journal

Research paper thumbnail of Photo-assisted catalytic degradation of acetaminophen using peroxymonosulfate decomposed by magnetic carbon heterojunction catalyst

Research paper thumbnail of Preparation, characterization and catalytic potential of γ-Fe2O3@AC mesoporous heterojunction for activation of peroxymonosulfate into degradation of cyfluthrin insecticide

Microporous and Mesoporous Materials

Research paper thumbnail of Activation of peroxymonosulfate into amoxicillin degradation using cobalt ferrite nanoparticles anchored on graphene (CoFe2O4@Gr)

Research paper thumbnail of Heterogeneous sonocatalytic degradation of amoxicillin using ZnO@Fe 3 O 4 magnetic nanocomposite: Influential factors, reusability and mechanisms

Journal of Molecular Liquids

Research paper thumbnail of Efficient adsorption of cobalt on chemical modified activated carbon: characterization, optimization and modeling studies

DESALINATION AND WATER TREATMENT

Research paper thumbnail of Heterogeneous catalytic degradation of organic compounds using nanoscale zero-valent iron supported on kaolinite: Mechanism, kinetic and feasibility studies

Journal of the Taiwan Institute of Chemical Engineers

Research paper thumbnail of Photocatalytic degradation of rhodamine B and real textile wastewater using Fe-doped TiO2 anchored on reduced graphene oxide (Fe-TiO2/rGO): Characterization and feasibility, mechanism and pathway studies

Research paper thumbnail of Development of maghemite nanoparticles supported on cross-linked chitosan (γ-Fe2O3@CS) as a recoverable mesoporous magnetic composite for effective heavy metals removal

Journal of Molecular Liquids

Research paper thumbnail of Catalytic ozonation of high concentrations of catechol over TiO 2 @Fe 3 O 4 magnetic core-shell nanocatalyst: Optimization, toxicity and degradation pathway studies

Journal of Cleaner Production

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