Service life and stability of electrodes applied in electrochemical advanced oxidation processes: A comprehensive review

Masoud Moradi,Yasser Vasseghian,Alireza Khataee,Mehmet Kobya,Hossein Arabzade,Elena-Niculina Dragoi 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.87 No.-

In recent years, novel advanced oxidation processes (AOPs) based on electrochemical technology knownas electrochemical advanced oxidation processes (EAOPs) have been applied to the degradation of a widerange of persistent organic pollutants (POPs). EAOPs produce in situ hydroxyl radicals ( OH) capable ofdegrading POPs and their mineralization by producing stable electrode materials (e.g., boron-dopeddiamond (BDD), doped-SnO2, PbO2, and substoichiometric- and doped-TiO2). Moreover, ozone andsulfate radicals could be produced, based on electrolyte type, which cause the degradation of POPs. Although EAOPs are promising novel technologies, various parameters related to the types of electrodesin the POPs oxidation have not been fully addressed. In order to provide a full and comprehensive pictureof the current state of the art, and improve the treatment efficiency and motivate new researches in theseareas, this study analyzed the research covering EAOPs aspects, with a focus on the comparison ofstability, lifetime and service life of electrodes. Electro-chemical stability and longer life are the majorconcerns in the EAOPs. Since electrodes must be highly efficient for long periods of time, thedetermination of their lifetime is essential. On the other hand, in real-life situations, lifetimedetermination is difficult. The oxidation ability and durability of electrodes during the reactionsdepended on the structural properties of them. Electrodes composed of intermediate compounds had ahigher lifetime than binary oxides. Another factor affecting the stability of the electrodes was thestructure of the expanded mesh style anodes to better control the bubble growth through a polygonizedstructure. Anodes with irregular shapes at the surface were more likely to discharge the bubbles andreduce the negative effects of the high pressure on the surface of the electrode. The electrodes havinghigh oxidation strength and stability, had a shorter service life value. Furthermore, the calcinationtemperature and the amount of applied current directly affected the lifetime of the electrodes. On theother hand, the electrical resistance of the synthesized electrode was effective in the lifetime. Coating ofelectrodes with noble metals such as tantalum, titanium, niobium, zirconium, hafnium, vanadium,molybdate and tungsten improved the electrode stability.

Iron-loaded carbon derived from separated microplastics for heterogeneous Fenton degradation of tetracycline hydrochloride

Liu Hongwen,Li Xingyang,Li Guosheng,Yasser Vasseghian,Wang Chongqing 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.12

Microplastics are gaining growing research interest due to their significant potential threats to ecosystems and public health. Physical techniques have been proposed as a promising strategy for removing microplastics from the environment. This work innovatively proposes a process of microplastic removal by froth flotation and subsequent carbonization for synthesis of heterogeneous Fenton catalyst. The feasibility of separating different microplastics from water was verified by froth flotation, and iron-loaded carbon derived from separated microplastics was fabricated as catalyst. Carbon material was obtained by carbonization of microplastics, and iron loading was conducted to improve catalytic ability. The catalyst of iron-loaded iron was characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The degradation of tetracycline hydrochloride in the heterogeneous Fenton system was evaluated by single factor experiment and kinetic analysis. The catalytic performance was mainly influenced by H2O2 concentration, solution pH, and co-existing ions. Under the conditions of catalyst 20 mg/L, H2O2 concentration 0.99 mmol/L, initial tetracycline hydrochloride concentration 20 mg/L, pH 4.0, and temperature 25 °C, the removal rate of tetracycline hydrochloride within 15 min reached 81.6%, and the rate constant was 0.138min−1. The catalytic mechanism dominated by hydroxyl radical was verified for the degradation of tetracycline hydrochloride. This work offers insights into the management of microplastics and sustainable treatment of antibiotic wastewater.

Bimetallic composite catalyst based on NiCu alloy supported on PVA/PANI film polymer for electrodegradation of methanol

Delloula Lakhdari,Nadjem Lakhdari,Ines Laourari,Abderrahmane Berchi,YoungKwon Park,Yasser Vasseghian,Mohammed Berkani 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-

In this study, three types of electrodes based on polyvinyl alcohol (PVA)/ polyaniline (PANI) are synthesizedand their effects on the electro-oxidation of methanol (MeOH) are investigated. Composite electrodesof PVA/PANI-Ni, PVA/PANI-Cu, and PVA/PANI-NiCu are synthesized via the in-situpolymerization of aniline, Cu, Ni, and NiCu (Ni80Cu20 alloy) particles in the presence of PVA. Opticaland chemical compositions and morphological characteristics of composite films are determined usingUV–Vis, FTIR, SEM, and TGA analysis. The electrode degradation efficiency of MeOH following oxidationand the elimination of toxins from the solution by voltammetry and chronopotentiometry is also investigated. The results indicate that PVA/PANI-NiCu performs better than PVA/PANI-Ni electrode. The degradationof MeOH in an alkaline medium is monitored using UV–visible spectroscopy under a currentdensity of 2.18 mAcm2 with a stock solution of 0.1 M MeOH for 120 min. The toxicities of MeOH andthe generated by-products were tested and confirmed through a growth-inhibition test againstStaphylococcus aureus ATCC 6538 using the disk-diffusion method; the obtained results confirmed theeffectiveness of our process.

Bioprospecting of biosurfactant-producing bacteria for hydrocarbon bioremediation: Optimization and characterization

Bellebcir Anfal,Merouane Fateh,Chekroud Karim,Bounabi Hadjira,Vasseghian Yasser,Kamyab Hesam,Chelliapan Shreeshivadasan,Klemeš Jiří Jaromír,Berkani Mohammed 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.10

Biosurfactants have been found capable of replacing synthetic surfactants which include ongoing bioprospecting of biosurfactant-producing bacteria as well as process optimization for maximum biosurfactant production. In this study, five morphologically distinct actinomycete strains isolated from hydrocarbon-polluted soil collected from an oil spill surface in Southeastern Algeria were tested for their ability to produce biosurfactants using preliminary biosurfactant screening assays. The 7SDS strain was selected as the most promising biosurfactant producer due to its greatest oil displacement diameter (7.83±0.15 cm), emulsification index (59.66±0.44%), and enhanced surface tension reduction (30.04±0.51 mN/m); it was identified as Streptomyces thinghirensis 7SDS using 16S rDNA sequence analysis. The 7SDS strain’s biosurfactant production was optimized using the Face-centered central composite design (CCD) based on response surface methodology (RSM). To this end, five independent factors, i.e., residual frying oil, used engine oil, whey, CS filtrate, and incubation time, were assessed. The RSM’s model predicted a surface tension of 27.48 mN/m using 2.44% (v/v) residual frying oil, 0.35% (v/v) used motor oil, 0.83% (v/v) whey, 0.39% (v/v) CS filtrate, and an incubation time of 219.3 h. The optimized medium produced 8.79 g/L of biosurfactant. The produced biosurfactant allows one to reduce the surface tension of distilled water from 70.86 mN/m to 27.96 mN/m at a critical micelle concentration of 350 mg/L, even over a wide range of pH (2.0–12.0), temperature (4–120 °C), and salinity (2–12%, W/V). Biochemical (Biuret, phenol-sulfuric acid, and phosphate tests) and compositional (FTIR and GC-MS) characterizations confirmed the phospholipid nature of the produced biosurfactant. Interestingly, the produced BS demonstrated significant antimicrobial activity as well as intriguing activity in removing hydrocarbons from polluted soil. Because of their appealing biological properties, strain 7SDS and its biosurfactant are attractive targets for a variety of applications such as biomedicine and environmental ones.

In-situ growth of 3D Cu-MOF on 1D halloysite nanotubes/reduced graphene oxide nanocomposite for simultaneous sensing of dopamine and paracetamol

Devaraj Manoj,Saravanan Rajendran,Tuan K.A. Hoang,Sabah Ansar,주상우,Yasser Vasseghian,Matias Soto-Moscoso 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.112 No.-

Three-dimensional (3D) metal–organic frameworks (MOFs) a class of porous materials with tunablestructure and surface functionality has arisen as electrode materials especially, for electrochemical sensingof analytes. However, MOFs possess intrinsic drawbacks such as poor conductivity with an agglomerationof particles, which restricted the electrochemical signal response in terms of sensitivity anddetection limits. In this regard, the present work aims to develop conducting Cu-MOF on HNTs, a goodsubstate for in-situ growth of MOF nanostructures due to the existence of abundant negatively chargedSi-OH that can help the growth of nanosized MOFs. The negatively charged siloxane (Si-O-Si) groupson the surface of HNTs can be attracted by positive charged Cu2+ ions present in the reaction mixturethrough strong electrostatic attraction. When subjected to hydrothermal treatment, the Cu2+ ions canform nano-sized Cu-MOF particles with assistance from 2-methylimidazole. Moreover, the presence ofgraphene oxide (GO) can improve the electrical conductivity, large surface area, and thus resulting inthe formation of conducting Cu-MOF/HNTs/rGO nanocomposite. Owing to the synergetic desirable propertiesof active metal sites and high porosity offered by Cu-MOF, the high conductivity of rGO, and thelarge surface area of HNTs, the resultant Cu-MOF/HNTs/rGO modified GC electrode demonstrates superiorelectrochemical signal response towards dopamine and paracetamol. Moreover, the developed sensorexhibits wide linear ranges of 0.1 lM–130 lM and 0.5–250 lM, with a low detection limit of 0.03 lMand 0.15 lM for dopamine and paracetamol, respectively.

Green catalyst derived from zero‑valent iron onto porous biochar for removal of Rhodamine B from aqueous solution in a Fenton‑like process

Chongqing Wang,Pau Loke Show,Xiuxiu Zhang,Yijun Cao,Yasser Vasseghian 한국탄소학회 2023 Carbon Letters Vol.33 No.7

Organic wastewater causes serious environmental pollution, and catalytic oxidation is promising technique for wastewater treatment. Developing green and effective catalysts is currently challenging. In this work, green synthesis of nano zerovalent iron loaded onto porous biochar derived from popcorn is conducted, and catalytic oxidation of Rhodamine B (RhB) is evaluated in the presence of H2O2. Effect of process factors is examined on catalytic performance for RhB removal. The mechanism of RhB removal is discussed by characterizations (Fourier transform infrared spectra and Raman) and UV–vis spectra. RhB removal is improved with high catalyst dosage, low initial RhB concentration, and high reaction temperature, while it is slightly influenced by carbonization temperature of biochar, H2O2 dosage and pH value. Under conditions of BC-250 1.0 g/L, H2O2 0.01 mol/L, pH 6.1, and temperature 30 °C, the removal rate of RhB is 92.27% at 50 min. Pseudo first-order kinetics is used to fitting experimental data, and the activation energy for RhB removal in BC-250/H2O2 system is 39 kJ/mol. RhB removal in BC-250/H2O2 system can be attributed to adsorption effect and catalytic oxidation with the dominant role of hydroxyl radical. This work gives insights into catalytic oxidation of organic wastewater using green catalyst.

Enhanced photocatalytic degradation of reactive blue 19 using zeolitic imidazolate framework-8 composited with Fe3O4/MnO2 heterojunction

Van Thuan Le,Hoang Sinh Le,Vy Anh Tran,이상화,Van-Dat Doan,주상우,Yasser Vasseghian 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-

The present study offers a novel recyclable Fe3O4/MnO2/ZIF-8 heterojunction photocatalyst for the degradationof reactive blue 19 (RB19) under visible light irradiation. The catalyst was facilely synthesized bydepositing Fe3O4/MnO2 nanocomposite onto the surface of ZIF-8 and characterized by field-emissionscanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy,X-ray diffraction, nitrogen adsorption–desorption isotherms and UV–vis spectroscopy. Morphology and structure characterization of the prepared photocatalyst indicated that polyhedralZIF-8 (ca. 500 nm) was coated by MnO2/Fe3O4 nanorods. The synergy effect of Fe3O4/MnO2/ZIF-8 compositeexhibited an excellent photocatalytic activity toward RB19 degradation of 99.5 % after 60 min of irradiationdue to high surface area and heterojunction formation. According to scavenger tests, thephotodegradation of RB19 dye over Fe3O4/MnO2/ZIF-8 was mainly contributed by OH and O2reactiveradicals. The kinetic study showed that the catalytic degradation of RB19 on Fe3O4/MnO2/ZIF-8 was betterdescribed by the first-order kinetic model. The new catalyst was easily recovered using an external magneticfield because of its magnetic properties. Besides, Fe3O4/MnO2/ZIF-8 showed high recyclability andstability, maintaining a high removal efficiency of 91.3 % even after ten repeated cycles. The overallresults indicated that the fabricated composite can be used as an efficient photocatalyst for treatingorganic dyes in wastewater.

Enhanced adsorption of cationic and anionic dyes using cigarette butt-based adsorbents: Insights into mechanism, kinetics, isotherms, and thermodynamics

Tran Thi Kieu Ngan,Le Van Thuan,Nguyen Tien Hoang,Doan Van Dat,Vasseghian Yasser,Le Hoang Sinh 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.7

The present study provides an eco-friendly and economical way to recycle discarded cigarette butts (CBs). The raw CBs were treated with NaOH (CB-B) and integrated with chitosan (Cs), and further applied as an adsorbent for the removal of synthetic dyes. Two common cationic dyes of methylene blue (MB) and crystal violet (CV) and one anionic dye of reactive blue 19 (RB 19) were selected as model adsorbates. The study results revealed that CB-B showed a high adsorption ability toward cationic dyes, while the CB-B/Cs composite exhibited a stronger affinity for the anionic RB 19. The adsorption of all selected dyes onto CB-B and CB-B/Cs was a spontaneous exothermic process, conforming to the pseudo-first-order kinetic and Langmuir isotherm models. The maximum adsorption capacities for MB, CV and RB 19 at pH of 7, an adsorbent dosage of 4, and a temperature of 25 °C were 89.85, 82.41, and 304.49 mg/g, respectively. The primary adsorption mechanism was physical adsorption with the participation of electrostatic attraction. The CB-based adsorbents displayed high reusability, maintaining more than 75% after four consecutive cycles of reuse. This study demonstrates the promising application potential of CB-based adsorbents for treating synthetic dyes in wastewater. The conversion of CBs into a useful high-value material has special significance for environmental engineering.