Article
Green & Sustainable Science & Technology
Tingting Zhang, Yanling Yang, Xing Li, Zhiwei Zhou, Bigui Wei
Summary: This study investigated the ultrasonic-thermal regeneration of powdered activated carbon (PAC) spent using 4-chlorophenol (4-CP). The ideal regeneration parameters were determined to be a 40 kHz frequency, 0.18 W/mL sonication power, 0.1 M NaOH and 50% (v/v) ethyl alcohol as the regeneration solution, and 1 g/L of saturated PAC mass with thermal regeneration as the second stage at 500 °C, desorbed for 30 min with a heating rate of 20 °C/min. The results showed that ultrasonic-thermal regenerated PAC had significantly increased oxygen functional group content, which positively affected the adsorption process of the regenerated PAC.
Article
Chemistry, Physical
Emmanuel Oluwaseyi Fagbohun, Qianyu Wang, Lucas Spessato, Yuhua Zheng, Wenli Li, Abiola Ganiyat Olatoye, Yanbin Cui
Summary: The study regenerated two types of plant-based activated carbons using a green chemical mixture, resulting in increased specific surface area and carbon yield. The activated carbons showed high adsorption capacity for methyl orange.
SURFACES AND INTERFACES
(2022)
Article
Energy & Fuels
Hanyu Deng, Wenzhen Cai, Lanhe Zhang, Yanping Jia, Xiaoqiang Wang, Qing Zong, Guishi Cheng, Xiaoying Hu, Changqing Dong, Ying Zhao
Summary: The dry desulfurization technology of activated coke/carbon (AC) adsorption has been widely applied, especially in the industry that requires the feedstock H2SO4. This work conducted temperature-programmed experiments to study the thermal regeneration of spent activated carbon in flue gas desulfurization, focusing on the dominant reaction between adsorbed H2SO4 and carbon: 2H(2)SO(4) + C -> CO2 + 2H(2)Ogas + 2SO(2). The inhibitory effect of H(2)Ogas on regeneration was verified for the first time, which is useful for reducing carbon consumption.
Review
Green & Sustainable Science & Technology
Isabelle Jones, Mingming Zhu, Juan Zhang, Zhezi Zhang, Jorge Preciado-Hernandez, Jian Gao, Dongke Zhang
Summary: Spent tyre activated carbon (STAC) shows excellent performance in dye adsorption, heavy metal removal and flue gas cleaning, outperforming commercial activated carbon (CAC) in certain applications despite lower surface areas. STAC's enhanced performance is attributed to high mesoporosity, low surface pH, and acidic surface functional groups. Steam activated STAC has comparable results to CAC in terms of surface area and pore volume, making them cleaner and sustainable alternatives to conventional products.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Ori Soker, Shilai Hao, Brian G. Trewyn, Christopher P. Higgins, Timothy J. Strathmann
Summary: Granular activated carbon (GAC) adsorption is commonly used for treating water contaminated with per- and polyfluoroalkyl substances (PFASs), but it requires frequent replacement and costly off-site thermal regeneration. Hydrothermal alkaline treatment (HALT) was found to effectively degrade and mineralize PFASs, enabling the regeneration of spent GAC. This method shows promise for on-site regeneration of PFAS-contaminated GAC and other adsorbent media, providing an alternative to off-site thermal regeneration practices.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yongyue Gong, Fang Liu, Hanqiao Liu, Hailong Zhao, Yuwen Zhu, Qianlong Han, Jianhua Zhou, Taibo Jiang, Siming Li
Summary: This article compares the environmental, energy, and economic performances of four spent activated carbon (AC) regeneration technologies demonstrated in China with conventional incineration. The results show that microwave and rotary-kiln regeneration technologies are preferred and can achieve break even in a short period of time, even with externalities. The transition from spent AC incineration to regeneration may reduce greenhouse gas emissions but increase human risks.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Review
Energy & Fuels
Md. Rashid Al-Mamun, Hridoy Roy, Md. Shahinoor Islam, Md. Romzan Ali, Md. Ikram Hossain, Mohamed Aly Saad Aly, Md. Zaved Hossain Khan, Hadi M. Marwani, Aminul Islam, Enamul Haque, Mohammed M. Rahman, Md. Rabiul Awual
Summary: This paper studies the design of solar water-heating systems and their major components such as solar thermal collectors, storage tanks, heat exchangers, heat transferring fluids, etc. The research critically evaluates the improvement of solar water-heating systems and their potential practical applications. Additionally, a new concept of using nanofluids as heat transfer fluids in solar collectors is studied. The thermal efficiencies of the systems using flat plate collectors and compound parabolic collectors are analyzed, and methods such as thermal stratification structures and coating of nanomaterials are discussed to enhance the performance of the system. The use of nanofluids, such as multiwall carbon nanotubes and Al2O3, also increases the efficiency of the system. Future recommendations for improving the performance of solar water-heating systems are suggested.
Article
Green & Sustainable Science & Technology
P. Marquez, A. Benitez, A. F. Chica, M. A. Martin, A. Caballero
Summary: This study proposes a method to recycle and reuse exhausted GACs in wastewater treatment plants. By conducting thermal regeneration in different atmospheres, the GACs can be regenerated with optimized textural properties. The results show that the regeneration cost is lower in an oxidizing atmosphere, and the regenerated GACs have appropriate characteristics for reuse in wastewater treatment plants.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Mohamad Aramesh, Bahman Shabani
Summary: By integrating a selected PCM within the structure of an evacuated tube solar hot water system, a novel PCM-based self-storing design is proposed. This design can maintain the collector output temperature at around 63 degrees C after 15 h of not receiving any sunlight, while the output temperature of the normal collector drops down to ambient temperature in the same period. The obtained energy storage efficiency is 57% and 75%, and overall thermal efficiency is 49% and 72%, for the normal and the self-storing collectors, respectively. For the smallscale system used in this study, the proposed design helps reduce the size of the hot water storage tank required to supply the hot water demand by 55%.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Suranjana Bose, Rebecca D. Kirk, Harry Maslen, Martha A. Pardo Islas, Benedict Smith, Thomas I. J. Dugmore, Avtar S. Matharu
Summary: In this study, degreased coffee grounds were used as precursors to produce highly mesoporous activated carbons for efficient removal of manganese ions. The commonly used activating agent, ZnCl2, was replaced by benign and sustainable CaCl2 and K2CO3. The adsorption process followed pseudo-second order kinetics and was spontaneous.
Article
Chemistry, Analytical
Lihua Dong, Chengliang Wu, Yingjie Han, Shujie Pan, Zhansheng Wang, Guanghui Zhang, Li'an Hou, Ping Gu
Summary: The spent biological activated carbon (SBAC) was used for the removal of radioactive Sr2+ in water, showing high removal efficiency, good regeneration performance, wide applicability, and without secondary pollution.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Cansu Guclu, Koray Alper, Murat Erdem, Kubilay Tekin, Selhan Karagoz
Summary: This study investigated the co-carbonization of waste truck tires and spent tea leaves using different blend ratios and chemical activating reagents at 800°C. The highest BET surface area was obtained with the use of ZnCl2 activation at a blend ratio of 1:3 (WTT/STL), resulting in higher carbon content and lower oxygen content compared to KOH activation. The oxygen removal efficiency of ZnCl2 was also found to be higher than that of KOH, producing activated carbons with comparable BET surface areas to commercially produced activated carbons.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Review
Chemistry, Multidisciplinary
Manoj Kumar Jha, Sahira Joshi, Ram Kumar Sharma, Allison A. Kim, Bishweshwar Pant, Mira Park, Hem Raj Pant
Summary: Improper discharge and management of agro-forest byproducts escalate global warming and water/air pollution, while their conversion into smart materials presents a promising strategy for waste management. Activated carbons (ACs) with developed porous structure and surface functional groups are extensively used as adsorbents, and their adsorption capacity can be enhanced through surface modifications for specific applications.
Article
Engineering, Environmental
Pengcheng Wang, Zongxiong Huang, Shan Chen, Miaoyu Jing, Zhihao Ge, Junyan Chen, Shuangli Yang, Jinghu Chen, Yimin Fang
Summary: The study introduces a novel method driven by solar energy for efficiently removing plastic particles in water, utilizing sunlight to create microbubbles that collect and fuse plastic particles without the need for chemical or biological reagents.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Diego Ramon Lobato-Peralta, Alejandro Ayala-Cortes, Adriana Longoria, Daniella Esperanza Pacheco-Catalan, Patrick U. Okoye, Heidi Isabel Villafan-Vidales, Camilo Alberto Arancibia-Bulnes, Ana Karina Cuentas-Gallegos
Summary: This study focuses on using Agave Angustifolia leaves as a precursor to produce activated carbons for energy storage in supercapacitors. The results show that the temperature and activating agent concentration play a crucial role in tailoring the properties of the carbons. These activated carbons demonstrate better electrochemical performance than commercial carbon, making them suitable for supercapacitor applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Environmental Sciences
Nicolas Lopez Ferber, Doan Pham Minh, Q. Falcon, A. Meffre, N. Tessier-Doyen, A. Nzihou, V Goetz
WASTE AND BIOMASS VALORIZATION
(2020)
Article
Environmental Sciences
N. Lopez Ferber, D. Pham Minh, Q. Falcoz, A. Meffre, N. Tessier-Doyen, A. Nzihou, V. Goetz
WASTE AND BIOMASS VALORIZATION
(2020)
Article
Energy & Fuels
C. Telegang Chekem, S. Chiron, J. M. Mancaux, G. Plantard, V Goetz
Article
Chemistry, Physical
E. Ribeiro, G. Plantard, V. Goetz
Summary: This study successfully synthesized AC/TiO2 composites with adjustable properties through a simple preparation method. Research shows that as the adsorbent mass ratio gradually increases, the adsorption properties of the composites improve, while the photo-oxidation rate decreases.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Hareb Al Jabri, Aumaya Taleb, Raphaelle Touchard, Imen Saadaoui, Vincent Goetz, Jeremy Pruvost
Summary: Temperature and light are crucial factors for microalgae production, affecting their growth kinetics, physiological properties, and adaptation mechanisms. In the Qatar desert, there are wide variations in temperature and light intensity, making it essential to study their effects on microalgae for large-scale outdoor production systems. Studies show that dynamic light and temperature have interactive effects on biomass productivity, with microalgae showing a high level of adaptation to fluctuations in light and temperature stress.
APPLIED SCIENCES-BASEL
(2021)
Article
Environmental Sciences
Chan Li, Nayara de Melo Costa Serge, Raquel Fernandes Pupo Nogueira, Serge Chiron, Vincent Goetz
Summary: The study demonstrates that FBC-CuO combined with PDS can effectively remove antibiotics and disinfect pathogens in wastewater, confirming its potential through experiments.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Reoyo-Prats Brice, Joannis-Cassan Claire, Hammadi Mouldi, Goetz Vincent, Calas-Blanchard Carole, Plantard Gael
Summary: This study addresses the conditions of wastewater treatment by photo-oxidation, emphasizing the importance of the matrix, concentration, and cocktail effects of pharmaceutical pollutants in wastewater treatment plants. It was found that the matrix effect had the most negative impact on molecule removal, while the cocktail effect decreased the difference in degradation rates. Additionally, lower initial concentrations were easier to degrade than higher laboratory concentrations.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2022)
Article
Engineering, Environmental
Reoyo-Prats Brice, Sellier Anastasia, Khaska Somar, Le Gal Lassalle Corinne, Weiss Karine, Goetz Vincent, Plantard Gael
Summary: Wastewater is a significant problem for the ecosystem due to its large quantities, the treatment methods used in most wastewater treatment plants, and the level of contamination by various pollutants, particularly emerging ones. One possible solution to reduce the pressure on water resources is the reuse of treated wastewater for various purposes. This paper investigates the capabilities of a photoreactor for removing micropollutants from wastewater, specifically urban wastewater. The experiments are conducted under controlled artificial irradiation conditions to simulate sunlight. The results show that the oxidation process selectively removes different categories of substances, but some molecules are not completely oxidized. Overall, the study evaluates the mass capacities of the system per unit of irradiated surface and per day for the target molecules.
Article
Engineering, Chemical
Vincent Goetz, Chloe Dezani, Enrique Ribeiro, Cyril Caliot, Gael Plantard
Summary: This article aims to develop a modeling and simulating tool for the operation of a continuous flow heterogeneous photocatalysis reactor. By focusing on the coupling between radiative transfer and reaction kinetics, and utilizing the Monte Carlo method to solve the radiative transfer equation, the dynamic simulation model has been validated.
Article
Materials Science, Multidisciplinary
E. Ribeiro, G. Plantard, V. Goetz
Summary: This research aims to develop activated carbon/TiO2 composites with a core-shell structure, where the AC core is covered with a photocatalyst. By modulating the fabrication procedures through mechanical grinding, the spatial distribution of the components can be controlled, preserving their sorption and photocatalytic properties. These core-shell composites offer a double functionality, allowing for accessibility to adsorption sites and maximum light harvesting.
Article
Engineering, Environmental
Chloe Dezani, Enrique Ribeiro, Vincent Goetz, Gaël Plantard
Summary: This study models the degradation of caffeine, a persistent pollutant, in a photo-reactor using a TiO2 catalyst. By solving the mass balance equation and the radiative transfer equation, and using Monte-Carlo method and Mie theory, the degradation rate and the treatment capacity and efficiency of the process were determined.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2022)
Article
Engineering, Environmental
Chan Li, Vincent Goetz, Serge Chiron
Summary: This study demonstrated the effective degradation of phenol and antibiotics in water using the CuO/PDS system, with Cu(III) and O·2- playing key roles in the process. The reduction and oxidation reactions involving copper in the system led to stable catalytic degradation of contaminants, with minimal leaching of copper from CuO observed in wastewater.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
E. Ribeiro, G. Plantard, F. Teyssandier, F. Maury, N. Sadiki, D. Chaumont, V Goetz
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Article
Chemistry, Multidisciplinary
E. Nadal, N. Barros, L. Peres, V Goetz, M. Respaud, K. Soulantica, H. Kachkachi
REACTION CHEMISTRY & ENGINEERING
(2020)
Article
Energy & Fuels
Lopez Ferber Nicolas, Q. Falcoz, D. Pham Minh, J. F. Hoffmann, A. Meffre, A. Nzihou, V. Goetz
JOURNAL OF ENERGY STORAGE
(2019)