Article
Chemistry, Multidisciplinary
Jae-Cheol Lee, Hee-Jun Kim, Hyun-Woo Kim, Hankwon Lim
Summary: The study explores the technical convergence of cold plasma and Fe-impregnated biochar for removing slowly-biodegradable methylene blue contaminants. Enhanced adsorption performance and accelerated degradation kinetics were observed, with impregnated Fe significantly boosting kinetic constants and shortening degradation periods. A synergistic combination of physicochemical processes was found to effectively manage stubborn pollutants.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Environmental
Chenhao Sun, Qing Du, Xinbo Zhang, Zhe Wang, Junyi Zheng, Qingzheng Wu, Zhimeng Li, Tianwei Long, Wenshan Guo, Huu Hao Ngo
Summary: Using anaerobic membrane bioreactors (AnMBRs) to treat swine wastewater is an effective method to recover bioenergy. This study found that adding biochar prepared from spent coffee grounds (SCG-BC) to AnMBR can increase methane yield, reduce CO2 production, and decrease membrane fouling.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Thermodynamics
Kuan-Ting Lee, Ching-Lin Cheng, Da-Sheng Lee, Wei-Hsin Chen, Dai-Viet N. Vo, Lu Ding, Su Shiung Lam
Summary: The new approach of using torrefied spent coffee grounds (TSCG) as a bioadsorbent for marine oil spill recovery shows promising results in terms of increased diesel adsorption capacity and higher heating value. The 300-degree C torrefied TSCG exhibits superior characteristics and has potential applications in environmental protection and resource recycling.
Article
Environmental Sciences
Gabriel Zenatte Frugoli, Maria Eduarda Simoes Dias, Giovana Tommaso
Summary: The purpose of this research is to reduce the soluble organic content in spent coffee grounds hydrothermal liquefaction wastewater through anaerobic digestion process while also recovering methane by the addition of activated carbon and biochar as adsorbents.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Chemistry, Multidisciplinary
Ahmed S. El-Shafie, Farahnaz G. Barah, Maha Abouseada, Marwa El-Azazy
Summary: This study investigated the efficacy of two biochar sorbents derived from orange peels for the removal of the antineoplastic drug daunorubicin from pharmaceutical wastewater. The results showed that magnetite-impregnated biochar had higher removal efficiency compared to pristine biochar.
Review
Engineering, Environmental
Le-Le Kang, Ya-Nan Zeng, Yi-Tong Wang, Jun-Guo Li, Fu-Ping Wang, Ya-Jun Wang, Qing Yu, Xiao-Man Wang, Rui Ji, Di Gao, Zhen Fang
Summary: Coffee waste as an adsorbent has great potential in wastewater treatment due to its porous structure and abundant functional groups for efficient removal of pollutants. It not only saves processing costs but also contributes to the sustainable development of the environment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Agricultural Engineering
M. E. Dias, G. H. D. Oliveira, P. T. Couto, K. J. Dussan, M. Zaiat, R. Ribeiro, M. J. Stablein, J. T. Watson, Y. Zhang, G. Tommaso
Summary: The anaerobic digestion of post hydrothermal wastewater from spent coffee grounds can effectively produce methane and recover energy. The highest COD removal rate and methane yield were observed at an initial COD level of 4000 mg COD L-1. Furthermore, the concentration of phenolic compounds in PHWW significantly affects methane production.
BIOMASS & BIOENERGY
(2021)
Article
Chemistry, Physical
Izabela Kruszelnicka, Michal Michalkiewicz, Dobrochna Ginter-Kramarczyk, Przemyslaw Muszynski, Katarzyna Materna, Marta Wojcieszak, Kamila Mizera, Joanna Ryszkowska
Summary: Currently, composites with natural fillers, such as spent coffee grounds (SCG), are gaining attention due to their potential as reinforcement materials in thermo-plastic matrices. This study investigated the long-term effect of activated sludge microorganisms on the mechanical properties of composites with SCG as filler. The research confirmed that the increased ratio of coffee grounds in the composite leads to increased diversity and abundance of microorganisms, with the highest number observed in the composite with 40% SCG. Ciliates, especially Epistylis genus, were the most common group of microorganisms in the samples after immersion in the bioreactor.
Article
Engineering, Environmental
Gunasunderi Raju, Mohammad Khalid Siddiqui, Noor Hana Hanif Abu Bakar, Hazizan Md Akil
Summary: This study investigates the influence of spent coffee and potassium hydroxide modified spent coffee as fillers on the mechanical and thermal properties of epoxidized natural rubber biocomposites. The results showed enhancement in mechanical properties with modified spent coffee, as well as improved homogeneity, while no significant differences were observed in FTIR analysis. Thermal analysis indicated higher stability for the modified samples compared to unmodified ones.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2022)
Article
Agricultural Engineering
Wei-Hsin Chen, Kuan-Ting Lee, Kuan-Yu Ho, Alvin B. Culaba, Veeramuthu Ashokkumar, Ching Joon Juan
Summary: Energy conservation is crucial for realizing a circular bioeconomy. This study develops a new method to evaluate the higher heating value (HHV) of biochar and predict moisture content using power consumption. The results show that increasing HHV is accompanied by a decrease in power consumption, which can be used to determine the pretreatment time for energy conservation.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Kuan-Ting Lee, Jyun-Ting Du, Wei-Hsin Chen, Aristotle T. Ubando, Keat Teong Lee
Summary: This study developed a green approach using hydrogen peroxide to intensify the fuel properties of spent coffee grounds through torrefaction, reducing environmental pollution. Neural network results showed that the higher heating value of biochar increases with rising temperature, duration, or H2O2 concentration, while bulk density has an opposite trend. Overall, the study successfully produced biochar with greater HHV and low bulk density at low temperatures, offering potential applications in bioadsorbents and soil amendments.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Wei-Hsin Chen, Jyun-Ting Du, Kuan-Ting Lee, Hwai Chyuan Ong, Young-Kwon Park, Chien-Chang Huang
Summary: A novel approach for upgrading biochar pore volume at low temperatures using sodium bicarbonate as a green additive was developed. The treated biochar showed improved specific surface area, total pore volume, CO2 uptake capacity, higher heating value, and lower ignition temperature. These enhancements make it a potential substitute for coal as fuel, demonstrating its potential for biofuel production, biowaste reuse, and bioadsorbent applications in a circular economy.
Article
Environmental Sciences
Yue Wang, Qingbai Tian, Guanyun Yang, Xiaoqiang Li, Wei Du, Yoong Kit Leong, Jo-Shu Chang
Summary: In this study, iron oxide-modified coffee grounds biochar (CGF) was prepared at different temperatures for the enhanced removal of chlortetracycline (CTC) through adsorption and degradation. The results showed that electrostatic interaction was the main mechanism for CTC removal, while pore diffusion, hydrogen bonds, and 7C-7C bonds also contributed to its adsorption. Higher temperature pyrolysis of coffee grounds increased the CTC adsorption capacity, but there were no significant advantages in using biochar prepared at a higher temperature for persulfate activation.
Article
Engineering, Environmental
Behnam Fayyaz Shahandashty, Narges Fallah, Bahram Nasernejad
Summary: In this study, the effects of two coagulants based on aluminum and ferric and three poly-acrylamide flocculants with different charges were compared. The results showed that aluminum sulfate coagulant and anionic flocculant had the greatest effect. Among the operational factors, the speed of the mixer had the largest impact. The optimized conditions for the coagulation process were determined, and the removal efficiencies of various pollutants were measured.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Gustavo A. Figueroa Campos, Jeffrey Paulo H. Perez, Inga Block, Sorel Tchewonpi Sagu, Pedro Saravia Celis, Andreas Taubert, Harshadrai M. Rawel
Summary: The valorization of coffee wastes through modification to activated carbon has the potential to compete with commercial carbons. Activated carbons prepared from spent coffee grounds and parchment showed lower adsorption capacity for lactic acid compared to standard commercial granular activated carbon. These results demonstrate the potential of using coffee by-products as low-cost adsorbents for removing organic compounds from aqueous solutions.
Article
Environmental Sciences
Ahmed S. El-Shafie, Siham S. Hassan, Nuri Akther, Marwa El-Azazy
Summary: In this study, watermelon rinds were used as an eco-friendly and cost-efficient adsorbent to remove acridine orange from contaminated water samples. The adsorption efficiency of the adsorbents was optimized by adjusting factors such as pH, sorbent dosage, the concentration of acridine orange, and contact time. The prepared adsorbents were characterized and the adsorption kinetics were investigated. The results showed that the thermally treated watermelon rinds had higher adsorption capacity and could be regenerated effectively.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Nessreen Al-Hashimi, Ahmed S. El-Shafie, Asmaa Jumaa, Marwa El-Azazy
Summary: A lanthanide-based optical sensor was developed for the sensitive and reliable determination of the fluoroquinolone antibiotic orbifloxacin. pH was identified as the most significant variable affecting fluorescence intensity, with FT-IR and Raman analyses confirming the complexation of ORLX with both metal ions. The proposed method was validated following ICH guidelines and showed successful analysis of injection formulation with high recovery rates.
JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Ahmed S. El-Shafie, Farahnaz G. Barah, Maha Abouseada, Marwa El-Azazy
Summary: This study investigated the efficacy of two biochar sorbents derived from orange peels for the removal of the antineoplastic drug daunorubicin from pharmaceutical wastewater. The results showed that magnetite-impregnated biochar had higher removal efficiency compared to pristine biochar.
Article
Multidisciplinary Sciences
Marwa El-Azazy, Ahmed S. El-Shafie, Reem Al-Mulla, Siham S. Hassan, Hassan I. Nimir
Summary: Pharmaceutical compounds pose a growing concern as emerging contaminants in aquatic systems, with antibiotics as a major class. This study successfully utilized mango seeds kernel as an adsorbent to efficiently remove rifampicin and tigecycline from wastewater. The nano-ceria-laden mango seeds kernel exhibited better adsorption performance. This research establishes the suitability of this modified adsorbent as a green, sustainable, cost-effective, selective, and efficient method for pharmaceutical wastewater treatment.
Article
Spectroscopy
Ahmed S. El-Shafie, Evana Rahman, Yasser Gadelhak, Rehab Mahmoud, Marwa El-Azary
Summary: The recycling of waste mandarin peels into biochar (MRBC) has been used as a high performance and cost-effective adsorbent for treating polluted wastewater effluents. Batch adsorption studies were conducted to analyze the adsorption competency of MRBC on two dyes, methylene blue (MB) and basic fuchsin (BF), either in individual solutions or binary combinations. The results showed that MRBC was capable of effectively removing a high percentage of both dyes. However, the adsorption capacity decreased when the dyes were combined. The cost estimation of MRBC production and wastewater treatment indicated that both were relatively low.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Water Resources
Ahmed S. El-Shafie, Maha Abouseada, Marwa El-Azazy
Summary: In this study, pistachio nutshells-derived biochar was utilized as a cost-effective adsorbent for efficiently removing methyl orange dye from wastewater. The morphology, stability, and structure of the biochar and its TiO2 functionalized form were extensively analyzed using various characterization techniques. It was found that the TiO2 functionalized biochar exhibited a synergistic photocatalytic-adsorptive efficiency in dye removal. The experimental results showed that the TiO2 functionalized biochar achieved a higher removal rate compared to adsorption alone.
APPLIED WATER SCIENCE
(2023)
Article
Environmental Sciences
Marwa El-Azazy, Ahmed S. S. El-Shafie, Samer Fawzy, David W. W. Rooney, Ahmed I. I. Osman
Summary: This research uses olive tree pruning biochar (BC-OTPR) to remove the phenothiazines promazine (PRO) and promethazine (PMT) from their individual and binary mixtures. The study evaluates the effects of operational variables through central composite design (CCD) and maximizes the simultaneous removal of both drugs. The adsorption characteristics, including equilibrium, kinetics, and regeneration, were also examined.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Ahmed S. El-Shafie, Fatima Karamshahi, Marwa El-Azazy
Summary: The performances of four adsorbents in removing methylene blue (MB) from wastewater were compared. Fe3O4@AVS-BC and Fe3O4@MMT nanocomposites showed superior removal percentages. Fe3O4@AVS-BC demonstrated a higher selectivity towards MB as compared to other organic contaminants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)