Article
Engineering, Environmental
Xinyu Gao, Chunying Zhang, Yanqiu Wang, Huan Zhang, Meiling Zhao, Yixian Wang, Yuting Guo
Summary: In this study, a heterogeneous electro-Fenton system was constructed using a Fe-loaded needle coke composite electrode to treat the membrane concentrated landfill leachate. The optimized reaction conditions resulted in significant removal of COD and color, as well as improved biodegradability. Spectral analysis showed degradation of organic pollutants in the leachate concentrate.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Chengrui Guo, Xia Qin, Rui Guo, Yue Lv, Mingran Li, Ziyuan Wang, Tinghui Li
Summary: In this study, the heterogeneous Fenton-like process using Cu-Fe@CTS as catalyst was applied to treat pre-coagulated leachate nanofiltration concentrate, achieving high removal efficiency of organic compounds. The results showed that the catalyst effectively removed Fulvic acid-like substances in water, with hydroxyl radicals (•OH) as the main active species.
Article
Engineering, Multidisciplinary
Mohd Salim Mahtab, Dar Tafazul Islam, Izharul Haq Farooqi
Summary: The study utilized the Fenton-based advanced oxidation technique for landfill leachate treatment, optimized the process through response surface methodology, determined the optimal operating conditions, and obtained a significant quadratic regression model that fit the experimental data.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2021)
Article
Environmental Sciences
Anna Kwarciak-Kozlowska, Krzysztof L. Fijalkowski
Summary: This study aimed to evaluate the efficiency of advanced oxidation and biochar adsorption in treating landfill leachate. The results showed that under specific conditions, these methods could effectively reduce COD and TOC levels, as well as decrease the toxicity of leachate, indicating their potential for environmental purification.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Salih Tasci, Ayse Ozguven, Burcin Yildiz
Summary: This study investigated the efficacy of the heterogeneous Fenton process for treating landfill leachate, optimizing the operating parameters and confirming the significant impact of variables on COD removal efficiency. The results showed that higher pH and chemical agents do not increase the COD removal efficiency, and the study proves the applicability of multi-response optimization for addressing environmental problems related to landfill leachate treatment.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Engineering, Environmental
Yihui Li, Zhiheng Li, Jie Bai, Fan Wang
Summary: This study compared the removal efficiency of refractory organic matter in landfill leachate using homogeneous Fenton and heterogeneous Fenton-like processes. The Fenton process showed slightly higher removal efficiency than the Fenton-like processes. The activation mechanisms in the Fenton-like processes involved homogeneous activation of Fe2+ in solution and heterogeneous activation of iron oxides produced during the reaction. This study provides a theoretical basis for the treatment of refractory organics in landfill leachate.
WASTE MANAGEMENT & RESEARCH
(2023)
Article
Engineering, Chemical
Anita Maslahati Roudi, Sultan Salem, Masoud Abedini, Amin Maslahati, Muhammad Imran
Summary: The Fenton process is gaining popularity as a wastewater treatment technique for hazardous landfill leachate. This study used response surface methodology (RSM) with central composite design to analyze the factors affecting landfill leachate treatment and found the optimal treatment conditions for pH, H2O2/Fe2+ ratio, Fe2+ concentration, and reaction time. The optimized Fenton process using the RSM approach was found to promote efficient landfill leachate treatment.
Article
Environmental Sciences
Alana C. Crispim, Danyelle M. de Araujo, Carlos A. Martinez-Huitle, Fernanda L. Souza, Elisama Dos Santos
Summary: This study investigates the applicability of electro-Fenton (EF) and photoelectro-Fenton (PEF) processes for treating landfill effluent with high organic content. The results show that after 4 hours of operation at a current density of 90 mA cm(-2), the best efficiencies for removing organic matter (COD) were 66%, 68%, and 89% for EF, PEF-UVA, and PEF-UVC, respectively, with relatively low energy consumption.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Zhihong Ye, Fei Miao, Hui Zhang
Summary: This study demonstrates for the first time the feasibility of removing COD and NH4+-N from landfill leachate using an electrochemical assisted HClO/Fe2+ process. The performance of active chlorine generation at the anode was evaluated, and the coexistence of (OH)-O-center dot and (FeO2+)-O-IV in the system was confirmed. The influence of pH, Fe2+ concentration, and current density on COD and NH4+-N removal was investigated, and the reaction mechanism was proposed. The proposed process shows promise as an alternative for treating refractory landfill leachate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Shuo Li, Yalun Yang, Heshan Zheng, Yongjie Zheng, Tao Jing, Jun Ma, Jun Nan, Yoong Kit Leong, Jo-Shu Chang
Summary: This paper summarizes the recent findings on advanced oxidation processes (AOPs) for landfill leachate treatment, focusing on the production routes and mechanisms of hydroxyl radical (·OH) and sulfate radical (SO4·-). It also highlights the challenges of using a single advanced oxidation technology for treating special leachates and the potential of synergistic combination with biological or physical methods.
Article
Engineering, Environmental
Emine Can-Guven, Senem Yazici Guvenc, Gamze Varank
Summary: This study investigated a sequential treatment of landfill leachate including coagulation and binary oxidation processes. The research optimized the chemical coagulation process and examined the factors affecting the binary oxidation process to achieve high removal efficiencies. The results showed that the binary processes were more effective than single processes, reaching significant removal efficiencies under optimal conditions.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
Sajid Hussain, Eleonora Aneggi, Alessandro Trovarelli, Daniele Goi
Summary: This study investigated the treatment of landfill leachate using a heterogeneous Fenton-like oxidation process with a Cu/ZrO2 catalyst. By adjusting reaction conditions such as pH, catalyst dosage, oxidant dosage, temperature, and reaction time, the researchers were able to achieve high removal efficiency of organic compounds. The study also evaluated the degree of oxidation using AOS and COS parameters. The results demonstrated the promising activity of the copper-based catalyst for the treatment of liquid waste.
Article
Engineering, Environmental
Hamza Bellouk, Mohamed Danouche, Imane El Mrabet, Karim Tanji, Fouad Khalil, Mostafa Nawdali, Naima El Ghachtouli, Hicham Zaitan
Summary: This study investigated the use of an ultrasound-photo-Fenton process (US-P-FP) for landfill leachate treatment. The results showed that the process effectively removed COD, UV254, and color from the leachate. Optimization of operating factors resulted in the highest removal efficiencies at specific conditions, and the treated leachate showed reduced phytotoxicity.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Sajid Hussain, Eleonora Aneggi, Alessandro Trovarelli, Daniele Goi
Summary: A series of iron and copper-based catalysts were prepared and tested for ibuprofen treatment, with copper-based catalysts showing higher activity retention upon recycling. Iron-based catalysts exhibited initial high activity but decreased significantly after multiple cycles, while copper-based catalysts displayed higher stability.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Tales Abreu Tavares de Sousa, Edilma Rodrigues Bento Dantas, Wilza da Silva Lopes, Valderi Duarte Leite, Jose Tavares de Sousa, Wilton Silva Lopes
Summary: Sanitary landfills are a popular way to dispose of solid waste, but the generation and management of leachate pose challenges in environmental engineering. Fenton treatment is effective in reducing organic matter in leachate, but the toxicity of treated leachate and the formation of new compounds need to be assessed. The treatment also results in a decrease in oxygen uptake rate and an increase in toxic effects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Matia Mainardis, Daniele Cecconet, Alessandro Moretti, Arianna Callegari, Daniele Goi, Stefano Freguia, Andrea G. Capodaglio
Summary: This paper critically reviews the application of treated wastewater for agricultural fertigation, and proposes a techno-economic methodology for assessing the sustainability of treated wastewater reuse in agriculture.
ENVIRONMENTAL POLLUTION
(2022)
Article
Green & Sustainable Science & Technology
Matia Mainardis, Silvia Mulloni, Arianna Catenacci, Maila Danielis, Erika Furlani, Stefano Maschio, Daniele Goi
Summary: This study investigated alternative methods to conventional tertiary treatment of pulp and paper wastewater, aiming to enhance the environmental and economic sustainability of industrial wastewater treatment. Cloth filtration showed good performance in removing suspended solids, while adsorption was effective in reducing chemical oxygen demand. Economic analysis suggested that a low-cost adsorbent supply chain is necessary for the economic feasibility of adsorption technology.
Article
Chemistry, Physical
Sajid Hussain, Eleonora Aneggi, Alessandro Trovarelli, Daniele Goi
Summary: This study investigated the treatment of landfill leachate using a heterogeneous Fenton-like oxidation process with a Cu/ZrO2 catalyst. By adjusting reaction conditions such as pH, catalyst dosage, oxidant dosage, temperature, and reaction time, the researchers were able to achieve high removal efficiency of organic compounds. The study also evaluated the degree of oxidation using AOS and COS parameters. The results demonstrated the promising activity of the copper-based catalyst for the treatment of liquid waste.
Review
Thermodynamics
Arianna Catenacci, Gaia Boniardi, Matia Mainardis, Fabian Gievers, Gianluigi Farru, Fabiano Asunis, Francesca Malpei, Daniele Goi, Giovanna Cappai, Roberto Canziani
Summary: This work reviews the integration of anaerobic digestion (AD) with pyrolysis/HTC, focusing on the use of AD digestates as feedstocks for char production. This interconnected approach can enhance the sustainable valorization of digestates in the circular economy. Different substrates and thermochemical technologies are discussed, with an analysis of their effects on char quality. The potential applications of char are presented, along with their advantages and drawbacks. However, limitations such as substrate variability, presence of pollutants, lack of legislative frameworks, and uncertain economic sustainability still hinder the full-scale implementation of digestate-derived char production and utilization.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Environmental Sciences
Sajid Hussain, Eleonora Aneggi, Clara Comuzzi, Diego Baderna, Daniele Zuccaccia, Alessandro Trovarelli, Daniele Goi
Summary: Landfill leachates are highly contaminated liquid waste and their treatment is challenging. This study focuses on developing simpler and faster tools for evaluating the treated waste and for preliminary screening of Fenton process conditions. Several analytical techniques, including UV-vis spectroscopy, AOX analysis, and H-1 NMR analysis, were used to assess the reduction of toxicity and degradation of contaminants. The results demonstrate the effectiveness of the investigated tool for preliminary evaluation of detoxification efficacy.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Juan D. Jimenez, Luis E. Betancourt, Maila Danielis, Hong Zhang, Feng Zhang, Ivan Orozco, Wenqian Xu, Jordi Llorca, Ping Liu, Alessandro Trovarelli, Jose A. Rodriguez, Sara Colussi, Sanjaya D. Senanayake
Summary: The study explored the mechanism of the methane dry reforming reaction using Pd/CeO2 catalysts prepared via mechanochemical synthesis. The results showed that the PdAcCeO2M catalysts had unique Pd-Ce interfaces, leading to enhanced reactivity and a distinct reaction mechanism compared to traditionally synthesized Pd/CeO2 catalysts. The presence of a carbon-modified Pd-0 and Ce-4+/(3+) surface arrangement in PdAcCeO2M was found to activate and sustain distinct Pd-CO intermediate species and strong Pd-CeO2 interactions during the reaction.
Article
Chemistry, Physical
Patrizia Frontera, Angela Malara, Anastasia Macario, Mariachiara Miceli, Lucio Bonaccorsi, Marta Boaro, Alfonsina Pappacena, Alessandro Trovarelli, Pier Luigi Antonucci
Summary: In this study, the catalytic behavior of nickel-based catalysts supported on ceria/zirconia, undoped and doped with lanthanum and neodymium, was investigated under steam reforming, partial oxidation and autothermal reforming reactions of different fuels. The catalytic properties were evaluated at a temperature of 800 degrees C, under atmospheric pressure, using steam/carbon and oxygen/carbon ratio, respectively, of S/C = 2.5 and O/C = 0.5. The doped catalyst showed better catalytic performance and resistance to deactivation due to improved distribution of nickel species and higher concentration of defect groups and oxygen vacancies on the catalyst surface.
Article
Engineering, Chemical
Patrizia Frontera, Angela Malara, Marta Boaro, Andrea Felli, Alessandro Trovarelli, Anastasia Macario
Summary: Ruthenium/nickel ex-solved perovskite catalysts were synthesized and characterized for ethanol autothermal reforming. The catalysts exhibited high ethanol conversion and hydrogen yield, with the SFMN/0.5Ru catalyst containing 0.5 wt% Ru showing the best performance. Increasing the amount of Ru in the catalyst resulted in reduced hydrogen yield and increased coke deposition.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Environmental Sciences
Federico Spizzo, Giovanni Venaruzzo, Matteo Nicolini, Daniele Goi
Summary: Water Distribution Network Partitioning (WDNP) is an effective strategy to improve network management by dividing the existing water distribution network (WDN) into smaller and more homogeneous District Metered Areas (DMAs). The partitioning can be achieved physically by closing pipes or virtually by installing flow meters. Both methods have advantages and disadvantages in terms of network performance and investment cost. This study presents an optimization approach using complex network theory and genetic algorithms (GA) to determine the optimal DMA configuration in terms of cost and network performance.
Article
Chemistry, Inorganic & Nuclear
Eleonora Aneggi, Filippo Campagnolo, Daniele Zuccaccia, Walter Baratta, Jordi Llorca, Alessandro Trovarelli
Summary: This study investigates the solvent-free oxidation of benzyl alcohol using air as an oxidant in the presence of ruthenium supported on alumina and zirconia. The catalyst shows good activity and complete selectivity, meeting the requirements for atom economy and environmental sustainability. The materials are stable and maintain high activity after recycling.
Article
Chemistry, Inorganic & Nuclear
Jacopo Segato, Eleonora Aneggi, Walter Baratta, Filippo Campagnolo, Leonardo Belpassi, Paola Belanzoni, Daniele Zuccaccia
Summary: The ion pairing structure of gold(III) catalysts during the hydration of alkynes has been determined through experimental and theoretical analysis. The choice of ligands can control the position of the counterion, affecting the reaction.
Article
Environmental Sciences
Matia Mainardis, Carmen Ferrara, Beatrice Cantoni, Camilla Di Marcantonio, Giovanni De Feo, Daniele Goi
Summary: This study evaluates and compares alternative tertiary treatment technologies for pulp and paper wastewater in terms of environmental performance and economic viability. The results show that the scenario involving ozone and granular activated carbon (GAC) performs the best, while the scenario involving ozone alone performs the worst.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
