Article
Chemistry, Applied
Zhe Zhang, Lei Xu, Yani Liu, Runtian Feng, Tong Zou, Yuanshuo Zhang, Yuru Kang, Pengxin Zhou
Summary: Activated carbon synthesized from thermally activated phosphoric acid-treated mangosteen peels shows excellent adsorption performance for methylene blue through physical adsorption. The optimal preparation conditions are a 1:3 impregnation ratio, activation for 60 minutes at 450 degrees Celsius.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Lenka Matejova, Jan Bednarek, Jonas Tokarsky, Ivan Koutnik, Barbora Sokolova, Gerardo Juan Francisco Cruz
Summary: Adsorption experiments and force-field based molecular modeling were used to study the adsorption of analgesics on activated carbons prepared from different agro-wastes. The role of pore size, carbon structural properties, and surface functionalization in analgesic adsorption was revealed, and the affinity of individual analgesics for carbon was determined. The adsorption mechanisms of diclofenac sodium salt, paracetamol, and ibuprofen were also investigated. The combination of experiment and molecular modeling was found to be a powerful tool for predicting adsorption properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Hongxia Zhao, Haihong Zhong, Yu Jiang, Huiyu Li, Pinggui Tang, Dianqing Li, Yongjun Feng
Summary: This study focuses on the production of porous carbon from shaddock peel for environmental treatments. The porous carbon structure and properties were found to be influenced by carbonization conditions and the use of ZnCl2 as a pore-forming agent. By carefully adjusting the carbonization temperature and the mass ratio between ZnCl2 and shaddock peel, the resulting adsorbent showed high adsorption capacity towards methylene blue. This biomass activated carbon adsorbent has potential to be effective and environmentally friendly for water pollution treatment.
Article
Water Resources
Ephraim Vunain, Joel Brian Njewa, Timothy Tiwonge Biswick, Adewale Kabir Ipadeola
Summary: Activated carbons prepared from rice husks and potato peels showed high efficiency in removing hexavalent chromium from tannery effluents, with adsorption process following pseudo-second-order kinetics and achieving optimal uptake at pH 2.0. RH-AC and PP-AC are effective adsorbents for chromium(VI) ions removal from wastewater.
APPLIED WATER SCIENCE
(2021)
Article
Chemistry, Physical
Tarik Avcu, Osman Uner, Unal Gecgel
Summary: This study analyzed the adsorption of diclofenac sodium on sycamore ball activated carbon surface, examining various parameters and using different models. The results showed that sycamore ball activated carbon is an effective adsorbent for sodium diclofenac adsorption, with high adsorption capacity and fast kinetics.
SURFACES AND INTERFACES
(2021)
Article
Environmental Sciences
Ali Soltaninejad, Mohammadhadi Jazini, Keikhosro Karimi
Summary: In this study, the valorization of potato peel wastes (PPW) for bioethanol and biogas production was investigated. Through processes such as ethanol solvent pretreatment and enzymatic hydrolysis, the PPW was successfully converted into energy.
Article
Biochemistry & Molecular Biology
Jakpar Jandosov, Mo Alavijeh, Shynggyskhan Sultakhan, Alzhan Baimenov, Maria Bernardo, Zuriyadda Sakipova, Seytkhan Azat, Svitlana Lyubchyk, Nurzhamal Zhylybayeva, Gulmira Naurzbayeva, Zulkhair Mansurov, Sergey Mikhalovsky, Dmitriy Berillo
Summary: A microgranulated binary biomedical preparation for oral use was developed in this study for the elimination of toxic substances from the gastrointestinal tract. The composite enterosorbent demonstrated high adsorption capacity for both lead and diclofenac, making it suitable for treating poisoning caused by substances of different chemical nature.
Article
Chemistry, Multidisciplinary
Quoc Toan Tran, Tra Huong Do, Xuan Linh Ha, Huyen Phuong Nguyen, Anh Tien Nguyen, Thi Cam Quyen Ngo, Hung Dung Chau
Summary: In this study, activated carbon derived from mangosteen peel (ACMP) was successfully fabricated, which showed good adsorption capability for ciprofloxacin (CIP). The CIP adsorption process of ACMP followed multiple adsorption models, and the adsorption rate was governed by membrane diffusion.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Lotfi Sellaoui, Luis F. O. Silva, Michael Badawi, Jawad Ali, Nathalia Favarin, Guilherme L. Dotto, Alessandro Erto, Zhuqi Chen
Summary: Experimental data shows that activated carbon produced from wastes deriving from a winery industry has different adsorption capacities for 2-nitrophenol and ketoprofen, with temperature playing a significant role. The modeling analysis suggests that a double layer model is suitable for describing the adsorption mechanisms, and the adsorption energy results indicate that physical interactions are responsible for the adsorption of the pollutants.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Agricultural Engineering
Lindong Li, Mingbang Wu, Chuhan Song, Lin Liu, Wenli Gong, Yanhong Ding, Juming Yao
Summary: This study proposed a simple and feasible approach for converting waste vinasse into high value-added activated carbon, which showed excellent adsorption ability to cationic methylene blue and high removal efficiency for industrial wastewater treatment. The results provide insights into solid waste treatment and high value-added transformation, as well as a promising application of AC for practical wastewater purification.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Ajit Kumar, Chandi Patra, Harish Kumar Rajendran, Selvaraju Narayanasamy
Summary: This study focuses on the adsorptive removal of the emerging pharmaceutical pollutant, Diclofenac, using a synthesized adsorbent. By optimizing the conditions, the adsorbent efficiently adsorbed Diclofenac. The experiments showed that the adsorbent surface is heterogeneous, promoting multilayer adsorption. Seed toxicity assay confirmed the effectiveness of the adsorbent.
Article
Water Resources
Ibrahim Metin Hasdemir, Emre Yilmazoglu, Senem Gungor, Belma Hasdemir
Summary: In this study, activated carbon was prepared using hazelnut shells, orange peel, and melon seeds as raw materials. The adsorption efficiencies of the produced activated carbons were evaluated and compared with a commercial activated carbon. The results showed that the activated carbons derived from hazelnut shells and orange peel exhibited higher adsorption efficiencies.
APPLIED WATER SCIENCE
(2022)
Article
Environmental Sciences
Adriana Moral-Rodriguez, Roberto Leyva-Ramos, Esmeralda Mendoza-Mendoza, Paola E. Diaz-Flores, Damarys H. Carrales-Alvarado, Maria F. Alexandre-Franco, Carmen Fernandez-Gonzalez
Summary: The textural and physicochemical characteristics of commercial activated carbons have a significant impact on their adsorption capacity for ronidazole and diclofenac. Coconut AC and Wood AC exhibit the highest adsorption capacity for RNZ and DCF at pH=7. The adsorption mechanism is mainly driven by π-π stacking interactions, and the presence of acidic sites enhances the adsorption capacity. The adsorption of RNZ on Coconut AC is irreversible, while the adsorption of DCF on Wood AC is reversible.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Energy & Fuels
Fuat Guzel, Filiz Koyuncu
Summary: This research examines the ability of a novel activated carbon prepared from citrus industrial waste to adsorb diclofenac in contaminated water. The results show that the activated carbon has a high adsorption capacity and can be regenerated multiple times.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Green & Sustainable Science & Technology
Asma Nasrullah, Amir Sada Khan, A. H. Bhat, Israf Ud Din, Abrar Inayat, Nawshad Muhammad, Esraa M. Bakhsh, Sher Bahadar Khan
Summary: The study investigates the effects of short time ball milling on activated carbon synthesized from mangosteen peels waste, and its adsorption capability for methylene blue dye. Results showed that ball milling decreases particle size of activated carbon, increases adsorption efficiency, and is influenced by pH, contact time, and temperature.
Article
Environmental Sciences
Regiane C. Ferreira, Diogo Dias, Isabel Fonseca, Maria Bernardo, Joao Lourenco Castagnari Willimann Pimenta, Nuno Lapa, Maria A. S. D. de Barros
Summary: Bovine bone char (BC) was used for highly efficient simultaneous removal of paracetamol and Cu(2+) ions from aqueous solutions. The presence of paracetamol enhanced the affinity of Cu(2+) in the binary system, leading to a higher removal rate of Cu2+.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
D. Dias, M. Bernardo, F. Pinto, I. Fonseca, N. Lapa
Summary: The study found that the GC obtained from the co-gasification of rice husk and polyethylene showed better performance in continuous flow Cr(III) removal assays compared to the commercial activated carbon (CAC), although in batch conditions, the results were the opposite. Both adsorbents removed Cr(III) through precipitation, with CAC showing slightly higher removal due to its higher porosity. Regeneration studies revealed that neither GC nor CAC could be used in more than one cycle.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ines Martins, Elena Surra, Marcia Ventura, Nuno Lapa
Summary: This study investigates the effect of hydraulic retention time (HRT) and organic loading rate (OLR) on the production of bioH(2) through dark fermentation (DF) of the organic fraction of municipal solid wastes (OFMSW). The results show that a 5-day HRT condition is the most favorable for bioH(2) production.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Beatriz Matos, Mary Batista, Joao Pires
Summary: In the face of global warming and the energy crisis, it is crucial to reduce the emissions of greenhouse gases like CO2 and CH4 and recycle biomethane from landfill biogas. This study demonstrates the potential of converting glycerol, a by-product of biodiesel production, into activated carbon using potassium acetate as an activating agent. The activated carbon exhibits high adsorption capacities for CO2 and CH4, with selectivity values that enable effective separation. Additionally, the study finds that the CO2 emissions produced during activated carbon synthesis can be easily neutralized through their use in small biogas production units.
ENVIRONMENTAL CHEMISTRY LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Mary Batista, Renato Carvalho, Moises L. Pinto, Joao Pires
Summary: Glycerin and dopamine were used as precursors to prepare microporous activated carbon adsorbent materials for the separation of ethane/ethylene and natural gas or landfill gas components. The activated carbons were produced through carbonization and chemical activation, with the introduction of nitrogenated groups to improve selectivity. Methane had the lowest adsorption capacity on the most effective material, followed by carbon dioxide, ethylene, and ethane.
Review
Chemistry, Physical
Elena Perez-Mayoral, Marina Godino-Ojer, Ines Matos, Maria Bernardo
Summary: In the last decade, metal-organic frameworks (MOFs) have been explored as precursors for functional porous carbons with enhanced catalytic performances. This review provides an overview of synthetic strategies to prepare MOFs and MOF-derived porous carbons, with a focus on their application in fine chemical synthesis. Although oxidation and reduction reactions have been extensively studied, the green synthesis of biologically active heterocyclic compounds through cascade reactions using MOF-derived porous carbons remains a challenge.
Article
Chemistry, Multidisciplinary
Elena Surra, Joao Sousa, Manuela Correia, Joao Carvalheiras, Joao A. Labrincha, Jose C. Marques, Nuno Lapa, Cristina Delerue-Matos
Summary: This study provides important information on the feasibility of using granite sludge as a substitute for feldspar in ceramics and as a substitute for inert filler in structural concrete. The results show that while granite sludge can be used as a substitute for feldspar, its tinting effect may limit its applications in certain ceramic products. Similarly, using granite sludge as a substitute for inert filler in concrete reduces strength and increases water:cement ratio. However, the environmental impacts of using granite sludge as an inert filler are lower than as a substitute for feldspar in most impact categories.
APPLIED SCIENCES-BASEL
(2023)
Article
Pharmacology & Pharmacy
Teresa Cordeiro, Ines Matos, Florence Danede, Joao C. Sotomayor, Isabel M. M. Fonseca, Marta C. C. Corvo, Madalena Dionisio, Maria Teresa Viciosa, Frederic Affouard, Natalia T. Correia
Summary: A rational design of drug delivery systems requires in-depth knowledge of the physical state and molecular mobility of the drug itself, as well as its distribution among carriers and interactions with the host matrix. This study investigates the behavior of simvastatin loaded in mesoporous silica MCM-41 matrix, showing that it exists in an amorphous state and interacts strongly with the MCM silanol groups. Molecular Dynamics simulations predict that simvastatin molecules anchor to the inner pore wall through multiple hydrogen bonds. MCM-41 loading proves to be a suitable strategy for the long-term stabilization of simvastatin in the amorphous form.
Article
Chemistry, Applied
Marina Godino-Ojer, Vanessa Ripoll Morales, Antonio J. Lopez Peinado, Maria Bernardo, Nuno Lapa, Ana Maria Ferraria, Ana Maria Botelho do Rego, Isabel M. Fonseca, Ines Matos, Elena Perez-Mayoral
Summary: Carbon catalysts prepared from pyrolysis of spent tires efficiently catalyse the synthesis of benzo-diazepine 1 under mild reaction conditions. The most acidic catalyst, CPN_H3PO4, showed the highest conversion and selectivity. The carbon matrix is involved in the initial steps of the reaction, catalyzing the formation of intermediate 4. The presence of acid functions on the carbon surface or SiP2O7 supported phase governs the catalytic performance.
Article
Engineering, Chemical
Regiane C. Ferreira, Thiago Peixoto de Araujo, Diogo Dias, Maria Bernardo, Nuno Lapa, Isabel M. Fonseca, Maria A. S. D. de Barros
Summary: Dende and babassu coconuts are commonly used in tropical countries for oil extraction, and the biowastes are processed to produce porous carbons. The carbons derived from these biowastes have more micropores compared to a benchmarking activated carbon of mineral origin. These carbons show no acute ecotoxicity to Vibrio fischeri and exhibit similar adsorption capacities for paracetamol and Cu2+ in mono- and bicomponent solutions.
Article
Environmental Sciences
Maria Bernardo, Nuno Lapa, Filomena Pinto, Miguel Nogueira, Ines Matos, Marcia Ventura, Ana Maria Ferraria, Ana Maria Botelho do Rego, Isabel Maria Fonseca
Summary: In this study, spent tire rubber was converted into activated chars for the recovery of Pb(II) and W(VI) ions from synthetic solutions. The activated chars exhibited higher surface areas and mineral content, resulting in enhanced uptake capacities for the ions. Cation exchange and surface precipitation were identified as the mechanisms for Pb and W adsorption, respectively. This work demonstrates the potential of valorizing spent tire rubber for the production of adsorbents with high uptake capacity of critical metallic elements.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Elena Surra, Rui P. P. L. Ribeiro, Tiago Santos, Maria Bernardo, Jose P. B. Mota, Nuno Lapa, Isabel A. A. C. Esteves
Summary: This study investigates the use of activated carbon materials derived from CO2 activation of Maize Cob Waste (MCW) as adsorbents for biogas upgrading. The carbon resulting from 3 hours of activation (MCW(PA)3 h) demonstrates better properties and selectivity towards CO2 compared to the one resulting from 2 hours of activation (MCW(PA)2 h). It shows higher CO2 uptake in the typical partial pressure range for biogas upgrading units and demonstrates good agreement between experimental results and the prediction using the axial dispersed plug-flow and Linear Driving Force (LDF) approximation for mass transfer modeling. This work lays the foundation for future modeling of a Pressure Swing Adsorption (PSA) cycle using MCW(PA)3 h as an adsorbent material and highlights the potential of this novel material for biogas upgrading processes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
