Article
Engineering, Environmental
Yong Chen, Yuangang Li, Ningdan Luo, Weike Shang, Shaosen Shi, Huajing Li, Yaodong Liang, Anning Zhou
Summary: The study developed a H2O2-free photo-Fenton process using BiVO4 as a semiconductor and Fe3+ as an additive to effectively degrade antibiotics. Comparisons between H2O2-free photo-Fenton and photocatalytic reactions showed the former had higher degradation rates under optimized conditions. The study deepened the understanding of mechanism and kinetics between photo-Fenton and photocatalytic reactions on the same catalyst, and highlighted the potential of H2O2-free photo-Fenton reactions on other semiconductors in treating wastewater with various antibiotics.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Yanyang Chu, Hongzhao Su, Chang Liu, Xianglei Zheng
Summary: Various composite cathodes were prepared and characterized, with the finding that using polyurethane sponge in cathode-shaping can greatly enhance the hydrophobic property of the cathodes and lead to the preparation of super-hydrophobic carbon cathodes. These cathodes showed improved reduction of O2 to H2O2, making them ideal for electro-generation of H2O2 with high efficiency and stability in the degradation of cefepime.
Article
Engineering, Chemical
Ana Paula Floriano Santos, Fabio Gozzi, Adriana Evaristo de Carvalho, Keila Roberta Ferreira de Oliveira, Anderson Rodrigues Lima Caires, Rodrigo Pereira Cavalcante, Rebeca Fabbro Cunha, Debora Antonio da Silva, Diego Roberto Vieira Guelfi, Lucas de Melo da Silva, Thalita Ferreira da Silva, Gleison Antonio Casagrande, Silvio Cesar de Oliveira, Amilcar Machulek Junior
Summary: This study investigated the use of solar photo-Fenton-like processes to degrade sanitary landfill leachates. The results showed that using Fe3+ as a coagulant combined with the photo-Fenton-like method effectively removed COD and DOC, improving the biodegradability and reducing the toxicity of the effluent. This method holds promising potential as a treatment method for wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Asaad Olabi, Sayiter Yildiz
Summary: The study demonstrated that the combination of ultrasonic process with UV light in Fenton processes plays a crucial role in disintegration of waste sludge, especially in modified Fenton process. Under optimal conditions, the addition of ultrasound significantly improved the degree of disintegration and reduced toxicity.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Arwa Aboudalle, Hayet Djelal, Lionel Domergue, Florence Fourcade, Abdeltif Amrane
Summary: This study aimed to improve the mineralization of the recalcitrant antibiotic metronidazole by developing a new combined process of electro-Fenton and a biological process. By combining autochthonous bioaugmentation and biostimulation, a mineralization rate of 96.1% was achieved after 120 hours, with a global treatment reaching a mineralization yield of 97% and reducing processing time by 16 days compared to conventional biological treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Jian Shen, Yahui Wu, Yaohua Yang, Qiongzhi Zhou, Xiang Liu, Tianxiang Wei, Xinyi Yu, Yifei Yu, Haitao Li, Tian Fang
Summary: In this study, dyeing based sludge carbons were activated via alkali etching to fabricate efficient and cost-effective heterogenous electro-Fenton catalysts for halogen-containing compounds removal. The increment of alkali activation level facilitated oxygen reduction towards a two-electrons transfer pathway with a high H2O2 yield. After a reaction time of 150 min, the catalyst achieved a 100% removal rate and a 62.14% mineralization efficiency for 4-Chlorophenols (4-CPs). The activated sludge carbons showed excellent stability even after enduring five cycles.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Bin Liu, Qixuan Jiang, Zenghui Qiu, Luo Liu, Ren Wei, Xin Zhang, Haijun Xu
Summary: The degradation mechanisms of nylon 6 (PA6) and polystyrene (PS) microplastics (MPs) were studied using different oxidative agents. The findings confirmed the oxidation and polymer chain scission of the MPs, and emphasized the importance of using multiple analytic methods in tandem to evaluate the degradation of environmental MPs.
Article
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Seyma Cingoz, Mustafa Yoruk, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: Achieving a neutral/positive energy balance without compromising discharge standards is a key goal in wastewater treatment plants. This study explores the coupling of high-rate activated sludge (HRAS) process with aerobic granular sludge (AGS) process as an energy-efficient pre-treatment option. The results show that feeding the AGS process with a mixture of HRAS process effluent and raw municipal wastewater can increase energy recovery potential and maintain high effluent quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Aimin Wang, Yanyu Zhang, Shanshan Han, Chunxiao Guo, Zhenjun Wen, Xiujun Tian, Jiuyi Li
Summary: This study systematically investigated the oxidation of cefoperazone (CFPZ) and found that the electro-Fenton (EF) process could effectively transform non-biodegradable CFPZ into biocompatible materials, allowing possible bio-treatment for further remediation.
Article
Engineering, Chemical
Wanjia Zhang, Xu Jiang, John Ralston, Jian Cao, Xin Jin, Wei Sun, Zhiyong Gao
Summary: Eosin Y, a commonly used dye for cotton and silk, is highly toxic and difficult to degrade. Around 20% of it becomes organic dye wastewater during the printing and dyeing process, posing serious harm to the environment and human health. In this study, naturally oxidized pyrite was chosen as a promising photocatalyst to degrade Eosin Y, achieving over 90% degradation under specific conditions.
MINERALS ENGINEERING
(2023)
Article
Engineering, Chemical
Huimin Sun, Ting Zhou, Jianing Kang, Yifan Zhao, Ying Zhang, Tiecheng Wang, Xianqiang Yin
Summary: In this study, MnFe2O4/g-C3N4 composite was synthesized and its photo-Fenton catalytic activity for OTC degradation was tested. The catalyst showed excellent catalytic activity, decomposing a high percentage of OTC. The degradation mechanism and pathways of OTC in the MnFe2O4/g-C3N4 system were analyzed. The composite material also exhibited stability and recyclability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Veronica Piazza, Abdusalam Uheida, Chiara Gambardella, Francesca Garaventa, Marco Faimali, Joydeep Dutta
Summary: Research on removing microplastics from water using the photo-Fenton process showed high degradation efficiency of PP and PVC microplastics with minimal environmental impact on aquatic organisms.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Christiarani Jegadeesan, Adishkumar Somanathan, Rajesh Banu Jeyakumar, V. Godvin Sharmila
Summary: The combined process of electrocoagulation and solar photo Fenton was used to treat landfill leachate, resulting in effective removal of COD and colour. The electrocoagulation process and solar photo Fenton process improved the biodegradability of the leachate, making it a viable treatment technique.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
M. Langone, G. Sabia, L. Petta, L. Zanetti, P. Leoni, D. Basso
Summary: This study assessed the aerobic biodegradability of process water produced by hydrothermal carbonization of dewatered anaerobic digested sludge and its toxicity on the heterotrophic activated biomass of conventional activated sludge systems. The results showed that the process water was highly biodegradable and did not have short-term toxic effects on the activated sludge.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Qian Guo, Wenjie Zhu, Daoli Yang, Xi Wang, Yinghao Li, Chao Gong, Jiali Yan, Jinli Zhai, Xiaoya Gao, Yongming Luo
Summary: In this study, a green solar photo-Fenton system based on natural pyrite was developed for the efficient degradation of carbamazepine. The system utilized natural organic acids to promote in-situ production of H2O2 and Fe(II) species, ensuring an efficient Fenton reaction without the need for additional H2O2 and pH adjustment. The system demonstrated a significant enhancement in the degradation efficiency of carbamazepine compared to pure pyrite, showcasing the potential of natural pyrite for environmental remediation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Youcef Serhane, Abdelkrim Bouzaza, Dominique Wolbert, Aymen Amin Assadi
Summary: This study investigates the optimization of photocatalytic treatment of toxic gases using TiO2-coated luminous textiles. The results show that the new configuration of optical fiber media with increased TiO2 and LED intensity significantly improves the degradation rate. The use of the optimized front flow reactor (PFR-LED) achieves higher specific degradation rate compared to the conventional reactor, and the inlet concentration and number of optical fiber supports further enhance the degradation rate and selectivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Nacer Belkessa, Youcef Serhane, Abdelkrim Bouzaza, Lotfi Khezami, Aymen Amin Assadi
Summary: This study investigates the photocatalytic oxidation of ethylbenzene vapor using TiO2 catalyst and explores the role of reactive species and degradation pathways. The results show that water vapor content, reaction atmosphere, and UV radiation wavelength significantly affect the degradation of ethylbenzene, with the hydroxyl radical playing a major role in the photocatalytic mechanism.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
M. Abidi, W. Abou Saoud, A. Bouzaza, A. Hajjaji, B. Bessais, D. Wolbert, A. A. Assadi, S. Rtimi
Summary: AgxO/Ag/TiO2 photoactive thin films were produced using different modes of magnetron sputtering and their spectral and microstructural properties were studied. The films exhibited fast photocatalytic degradation of VOCs and bacterial inactivation under low visible light intensity. The mechanism of VOCs degradation on AgO/Ag/TiO2 catalysts involves hole transfer and reactive oxygen species. The study also found that the prepared materials have repetitive reuse capability.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Elkhir Ouahiba, Malika Chabani, Aymen Amin Assadi, Amrane Abdeltif, Fourcade Florence, Bouafia Souad
Summary: Different oxidation processes were studied to compare the removal efficiency of Oxytetracycline (OTC). The initial pH solution was found to have an important role in the photolysis of OTC. The addition of oxidants had an impact on mineralization. Quantification of the main radicals involved in the oxidation process was performed.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Review
Chemistry, Physical
Achraf Amir Assadi, Oussama Baaloudj, Lotfi Khezami, Naoufel Ben Hamadi, Lotfi Mouni, Aymen Amine Assadi, Achraf Ghorbal
Summary: Indoor air quality is a major public health concern, and photocatalytic technology is a cost-effective and efficient method for deep air purification. This review focuses on recent studies that aim to improve the photocatalytic activity of TiO2-based materials for indoor air treatment and bacterial inactivation. Various TiO2-based catalysts, their properties, and advantages in the photocatalytic process are discussed, along with the use of doping and heterojunction techniques to enhance photocatalytic activity. The importance of combining catalysts to increase air treatment efficiency and the removal of volatile organic compounds (VOCs) and microorganisms are also summarized.
Article
Chemistry, Analytical
Madiha Melha Yahoum, Selma Toumi, Hichem Tahraoui, Sonia Lefnaoui, Mohammed Kebir, Abdeltif Amrane, Aymen Amin Assadi, Jie Zhang, Lotfi Mouni
Summary: This study aimed to prepare xanthan gum microspheres using ionotropic gelation for the encapsulation of metformin hydrochloride. The obtained microspheres, based on different fractions of xanthan gum, showed an average size ranging from 110.96 μm to 208.27 μm. The encapsulation efficiency reached 93.11% at a 1.25% biopolymer concentration. The swelling study demonstrated significant swelling in the gastric and intestinal environments, with release profiles showing sustained release kinetics.
Article
Green & Sustainable Science & Technology
Madiha Melha Yahoum, Selma Toumi, Hichem Tahraoui, Sonia Lefnaoui, Abdelkader Hadjsadok, Abdeltif Amrane, Mohammed Kebir, Jie Zhang, Aymen Amine Assadi, Lotfi Mouni
Summary: This research developed hydrophobic and potentially amphiphilic benzyl xanthan gum (BXG) derivatives using a Williamson synthesis. The molar ratio and degree of substitution were studied to understand the amphiphilic character of the derivatives. Physicochemical and rheological characterization techniques confirmed the effectiveness of the modification. The BXG derivatives exhibited increased conductivity, critical aggregation concentration, and emulsifying power compared to native XG.
Article
Green & Sustainable Science & Technology
Selma Toumi, Madiha Melha Yahoum, Sonia Lefnaoui, Abdelkader Hadjsadok, Asma Nour El Houda Sid, Amel Hind Hassein-Bey, Abdeltif Amrane, Jie Zhang, Amin Aymen Assadi, Lotfi Mouni
Summary: Amphiphilic derivatives of kappa carrageenan (KC) were synthesized by hydrophobic modification using alkyl halide. The derivatives with different degrees of substitution (DS) were obtained through Williamson etherification reaction in alkaline conditions. The synthesized derivatives exhibited improved amphiphilicity and emulsifying properties.
Article
Green & Sustainable Science & Technology
Fatine Drhimer, Maryem Rahmani, Boutaina Regraguy, Souad El Hajjaji, Jamal Mabrouki, Abdeltif Amrane, Florence Fourcade, Aymen Amine Assadi
Summary: Food coloring has become a significant source of water pollution, particularly Brilliant blue (BB) dye in the food industry. Heterogeneous photocatalysis using titanium dioxide was employed to treat this pollution. The study demonstrated the effectiveness of photodegradation of BB dye using a photoreactor at both laboratory and pilot scales, achieving high degradation rates. This research highlights the potential of photocatalysis as a promising technique for water purification.
Article
Chemistry, Physical
N'Zanon Aly Kone, Nacer Belkessa, Youcef Serhane, Sandotin Lassina Coulibaly, Mahamadou Kamagate, Lotfi Mouni, Sivachandiran Loganathan, Lacina Coulibaly, Abdelkrim Bouzaza, Abdeltif Amrane, Aymen Amine Assadi
Summary: Mineralization of gaseous chlorobenzene from cement plants was studied using photocatalysis, Dielectric Barrier Discharge (DBD) plasma, and DBD/TiO2-UV coupling. An overproduction of OH* and O* radicals in the reaction medium was observed due to the interaction of Cl* and O-3. The removal efficiency was influenced by the concentration, flow rate, and applied voltage, with variations leading to changes in degradation rate and selectivity.
Review
Chemistry, Multidisciplinary
Mohamed Majdi Cherif, Imen Assadi, Lotfi Khezami, Naoufel Ben Hamadi, Aymen Amine Assadi, Walid Elfalleh
Summary: This paper showcases the potential uses of cold plasma in the food sector, highlighting recent developments and market trends. Cold plasma has been proven effective in enhancing food products' quality and shelf life. Understanding the mechanisms and factors that affect the effectiveness of cold plasma is crucial in implementing it in food processing.
APPLIED SCIENCES-BASEL
(2023)
Article
Crystallography
Bilel Abdouli, Lotfi Khezami, Ahlem Guesmi, Aymen Amine Assadi, Mohamed Ben Rabha
Summary: This study investigates the effects of front surface recombination velocities and base thickness on the quantum efficiency of solar cells. It was found that both surface recombination velocities and base widths have a significant impact on the quantum efficiency. The research also confirms the validity of the theoretical calculations through experimental results, showing that solar cells with front-thin porous silicon and rear interdigitated contact exhibit enhanced quantum efficiency compared to reference solar cells. The findings highlight the importance of optimizing surface structures for improving solar cell performance.
Article
Environmental Sciences
Zakaria Triki, Zineb Fergani, Sabrina Lekmine, Hichem Tahraoui, Abdeltif Amrane, Meriem Zamouche, Mohammed Kebir, Amin Aymen Assadi, Lotfi Khezami, Jie Zhang
Summary: Vacuum membrane distillation (VMD) is a promising technique for water desalination due to its superior pure water permeability at lower operating temperatures. This study establishes a comprehensive numerical model to describe water vapor transfer in VMD processes for seawater desalination. The findings show that feed temperature is the most important factor affecting permeation flux, while feed flow rate is the least important factor.
Article
Environmental Sciences
Kheira Benazouz, Nasma Bouchelkia, Ali Imessaoudene, Jean-Claude Bollinger, Abdeltif Amrane, Aymen Amine Assadi, Hicham Zeghioud, Lotfi Mouni
Summary: Chitosan was successfully synthesized from gray shrimp carapaces and used for adsorbing Orange G dye. Optimum conditions for maximum dye uptake were determined through optimization and modeling processes.
Article
Chemistry, Physical
Madiha Melha Yahoum, Selma Toumi, Salma Hentabli, Hichem Tahraoui, Sonia Lefnaoui, Abdelkader Hadjsadok, Abdeltif Amrane, Mohammed Kebir, Nassim Moula, Amin Aymen Assadi, Jie Zhang, Lotfi Mouni
Summary: The main objective of this study was to create a mathematical tool that could predict the rheological flow behavior of functionalized xanthan gum based on the types of chemical groups grafted onto its backbone. Different analyses were done to evaluate six derivatives synthesized via etherification, and it was found that the derivatives had lower molecular weights and exhibited shear-thinning behavior. An ANN model was also created to predict one of the rheological properties, and the results showed that the model was efficient in predicting flow behavior.
