Efficient visible light-induced photocatalytic removal of paraquat using N-doped TiO2@SiO2@Fe3O4 nanocomposite

Pourzad, Ahmadreza; Sobhi, Hamid Reza; Behbahani, Mohammad; Esrafili, Ali; Kalantary, Roshanak Rezaei; Kermani, Majid

doi:10.1016/j.molliq.2019.112167

Cited by 53 publications

(29 citation statements)

References 46 publications

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“…As the solubility of paraquat in water is high, contamination of water resources and damage to aquatic organisms are highly likely. Also, damage to the kidneys, liver, and lungs has been reported by this herbicide (4). Another herbicide, glyphosate, was classified by the World Health Organization (WHO) in 2015 as a carcinogenic compound for humans (5).…”

Section: Introductionmentioning

confidence: 99%

“…In another study by Pourzad et al, the mineralization of paraquat by visible light-induced photocatalytic degradation using N-doped TiO2@SiO2@ Fe3O4 nanocomposite was investigated. They reported the maximum total organic carbon (TOC) removal efficiency by this process as 84.71% (4). In general, despite the high efficiency of the mentioned processes, the toxicity of some catalysts such as TiO2 for human body, the difficulty of the process operation and its high cost are the main disadvantages of these processes (20,21).…”

Section: Introductionmentioning

confidence: 99%

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Application of heterogeneous catalytic ozonation process for treatment of high toxic effluent from a pesticide manufacturing plant

Ghahrchi

Bazrafshan

Badan

et al. 2020

Environ Health Eng Manag

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Background: The discharge of untreated wastewater containing toxic and resistant compounds into the environment is a serious threat for ecosystems. Therefore, this study was conducted to evaluate the treatment of poison production factory wastewater using heterogeneous catalytic ozonation process (COP). Methods: Magnetic carbon nanocomposite was used as a catalyst at concentrations of 1, 2, and 4 g/L. Its effect on improving the treatment process was evaluated at reaction time of 30, 60, 90, and 120 minutes. At the end of each experiment, parameters including total organic carbon (TOC), chemical oxygen demand (COD), biological oxygen demand (BOD5 ), pH, electrical conductivity (EC), and turbidity were measured. Results: It was revealed that in single ozonation process (SOP), the maximum removal efficiencies of TOC, COD, and BOD5 were achieved at reaction time of 120 minutes as 56%, 40%, and 11.7%, respectively. By adding the catalyst to the wastewater, the treatment process was improved, so that the maximum removal efficiencies of COD (91%), TOC (73%), and BOD5 (74%) were obtained at catalyst concentration of 4 g/L. Under this condition, BOD5 /COD ratio increased from 0.22 to 0.64. Also, the results of analysis of ozone consumption per each mg of reduced COD showed that its amount sharply decreased from 2.1 mgO3 / mg COD removal in the SOP, to 0.34 mgO3 /mg COD removal in the COP. The results of kinetic reaction analysis also revealed that the rate constant increased from 0.007 to 0.02 min-1. Conclusion: According to the results, it can be concluded that the COP at a catalyst concentration of 4 g/L, by decomposing resistant compounds and increasing the biodegradability, can be used as a suitable pretreatment method for biological processes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Application of heterogeneous catalytic ozonation process for treatment of high toxic effluent from a pesticide manufacturing plant

Ghahrchi

Bazrafshan

Badan

et al. 2020

Environ Health Eng Manag

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“…Nanofluids have unique characteristics when compared to conventional fluids, making them highly applicable in diverse fields [1]. Certain areas where nanotechnology have gained application are in microelectronics, medical and health technology, aerospace, agriculture [2] and even the decomposition of pollutants in the environment [3]. Nanofluids are effective heat transfer fluids due to their high thermal conductivity properties which have made them useful in industrial devices like industrial heat exchangers, solar heat exchangers and solar collectors [4].…”

Section: Introductionmentioning

confidence: 99%

An intelligent approach to predicting the effect of nanoparticle mixture ratio, concentration and temperature on thermal conductivity of hybrid nanofluids

Wole‐Osho

Okonkwo

Adun

et al. 2020

J Therm Anal Calorim

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Hybrid nanofluids are better heat transfer fluids than conventional nanofluids because of the combined properties of two or more nanoparticles. In this study, the thermal conductivity of Al 2 O 3-ZnO nanoparticles suspended in a base fluid of distilled water is investigated. The experiments were conducted for three mixture ratios (1:2, 1:1 and 2:1) of Al 2 O 3-ZnO nanofluid at five different volume concentrations of 0.33%, 0.67%, 1.0%, 1.33% and 1.67%. X-ray diffractometric analysis, X-ray fluorescence spectrometry and scanning electron microscopy were used to characterise the nanoparticles. The highest thermal conductivity enhancement achieved for Al 2 O 3-ZnO hybrid nanofluids with 1:2, 1:1 and 2:1 (Al 2 O 3 :ZnO) mixture ratios was 36%, 35% and 40%, respectively, at volume concentration 1.67%. The study observed the highest thermal conductivity for Al 2 O 3-ZnO nanofluid was achieved at a mixture ratio of 2:1. A "deeping" effect was observed at a mixture ratio of 1:1 representing the lowest value of thermal conductivity within the considered range. The study proposed and compared three models for obtaining the thermal conductivity of Al 2 O 3-ZnO nanofluids based on temperature, volume concentration and nanoparticle mixture ratio. A polynomial correlation model, the adaptive neuro-fuzzy inference system model and an artificial neural network model optimised with three different learning algorithms. The adaptive neuro-fuzzy inference system model was most accurate in forecasting the thermal conductivity of the Al 2 O 3-ZnO hybrid nanofluid with an R 2 value of 0.9946.

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“…Recently, Much attention to TiO 2 ‐SiO 2 oxide, which was a catalyst in the field of electrochemistry, exhibiting excellent performances . TiO 2 is a semiconducting material with excellent catalytic activity and SiO 2 has high thermal stability and mechanical strength . The interaction of TiO 2 with SiO 2 including physically mixed and chemically bonded could further extend their applications through the generation of new catalytic active sites .…”

Section: Introductionmentioning

confidence: 99%

“…[25] TiO 2 is a semiconducting material with excellent catalytic activity and SiO 2 has high thermal stability and mechanical strength. [26] The interaction of TiO 2 with SiO 2 including physically mixed and chemically bonded could further extend their applications through the generation of new catalytic active sites. [27] In addition, Sb-doped SnO 2 has proved to be a good electro-catalyst owing to its unique crystalline structure.…”

mentioning

confidence: 99%

Degradation of p‐aminophenol wastewater using Ti‐Si‐Sn‐Sb/GAC particle electrodes in a three‐dimensional electrochemical oxidation reactor

Zhang

Meng

et al. 2020

Applied Organom Chemis

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In this study, Ti‐Si‐Sn‐Sb/GAC particle electrodes were prepared by sol–gel method. The particle electrodes were characterized by SEM, XRD, EDX, and BET then used to carry out three‐dimensional (3D) electrocatalytic oxidation degradation on simulated refractory p‐aminophenol (PAP) wastewater. The effects of initial pH, cell voltage, aeration flow rate and initial PAP concentration on degradation experiments were investigated. Under the optimal conditions, the PAP and COD removal rates were 89.45% and 75.17% respectively. In addition, the possible degradation mechanism of PAP was further investigated by UV–Vis and HPLC. Finally, it was found that the Ti‐Si‐Sn‐Sb/GAC particle electrodes with high catalytic activity and excellent stability could significantly improve the PAP wastewater removal efficiency.

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Efficient visible light-induced photocatalytic removal of paraquat using N-doped TiO2@SiO2@Fe3O4 nanocomposite

Cited by 53 publications

References 46 publications

Application of heterogeneous catalytic ozonation process for treatment of high toxic effluent from a pesticide manufacturing plant

Application of heterogeneous catalytic ozonation process for treatment of high toxic effluent from a pesticide manufacturing plant

An intelligent approach to predicting the effect of nanoparticle mixture ratio, concentration and temperature on thermal conductivity of hybrid nanofluids

Degradation of p‐aminophenol wastewater using Ti‐Si‐Sn‐Sb/GAC particle electrodes in a three‐dimensional electrochemical oxidation reactor

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