Article
Engineering, Environmental
Bomin Fu, Corinne Ferronato, Ludovic Fine, Frederic Meunier, Jose Luis Valverde, Victor R. Ferro Fernandez, Anne Giroir-Fendler, Jean-Marc Chovelon
Summary: The study investigated the adsorption characteristics of three activated carbons derived from wood on Pemetrexed (PEME) and found that different activated carbons exhibited varying adsorption behaviors in the experiments. The results also indicated that the surface functional groups of the activated carbons play a role in influencing the adsorption of the adsorbate.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Martyna Jurkiewicz, Robert Pelech
Summary: This study investigated the adsorption process of o-DCB onto ACs and modified CNTs from the aqueous phase. It was found that carbon adsorbents are effective in removing o-DCB, with ACs showing higher regenerative abilities compared to CNTs. The modifications of CNTs improved their adsorption properties for o-DCB, but impacted the effectiveness of the regeneration process.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Engineering, Chemical
Isabel Pestana da Paixao Cansado, Paulo Alexandre Mira Mourao, Jose Eduardo dos Santos Felix Castanheiro
Summary: This study examines the effects of regeneration treatments on adsorption-desorption cycles and the efficiency of different regeneration methods for activated carbon adsorbents in removing MCPA pesticides from wastewater. The results show that ethanol regeneration performs well in subsequent adsorption-desorption cycles.
Article
Engineering, Environmental
Fei Lyu, Sulin Niu, Li Wang, Runqing Liu, Wei Sun, Dongdong He
Summary: The study employed a hydrothermal method to modify red mud, significantly enhancing its adsorption capacity for Pb(II) ions. The modified red mud formed a zeolite structure and mainly removed lead ions from aqueous solution by monolayer physical adsorption, showing high efficiency in adsorption performance.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xiaohong Guo, Weiwei Hu, Zheng Gu, Jiali Li, Zongfan Xie, Caixia Fang, Haisheng Tao
Summary: In this study, a high adsorption performance activated carbon was prepared from soybean straw residue for efficient removal of chromium(VI) from water. The generated soybean straw-based activated carbon had a large specific surface area and electron-donating groups on the surface, which promoted a high adsorption capability. The adsorption process was found to be spontaneous, endothermic, and dominated by reduction and electrostatic adsorption mechanisms.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Environmental Sciences
Amali Herath, Cody A. Layne, Felio Perez, Ei Barbary Hassan, Charles U. Pittman, Todd E. Mlsna
Summary: Through KOH activation, high surface area Douglas fir biochar obtained from commercial syn-gas production shows remarkable enhancement in heavy metal adsorption capacity for Cr(VI), Pb(II) and Cd(II). The adsorption process follows pseudo-second order kinetics and the Langmuir adsorption model for all three metals. The desorption study reveals that Pb(II) adsorption onto KOH-activated biochar surface is reversible, while portions of Cd(II) and Cr(VI) adsorbed strongly onto the biochar cannot be desorbed by typical solutions.
Article
Green & Sustainable Science & Technology
Wei Zhang, Wenxian Li, Sean Li
Summary: This study presents a green and facile self-template activation strategy for synthesizing hierarchical porous carbons as electrode materials for aqueous supercapacitors. The hierarchical porous carbons can be obtained by one-step pyrolysis of sodium carboxymethylcellulose (CMCNa) without pre-mixing procedures and additional activation processes. The dependence of aqueous capacitive performance on the pyrolysis temperature, molecular weight, and degree of substitution of CMCNa is revealed.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Biochemistry & Molecular Biology
Magdalena Blachnio, Anna Derylo-Marczewska, Szymon Winter, Malgorzata Zienkiewicz-Strzalka
Summary: Mesoporous carbons with differentiated properties were synthesized by impregnation of organized silicas, and their structural, surface, and adsorption properties were investigated using various methods. Experimental data analysis confirmed the applicability of mesoporous carbons for dye removal, with techniques such as SAXS, nitrogen sorption, potentiometric titration, and TEM providing complementary results on porosity and structural ordering. Adsorption experiments, particularly kinetic measurements, demonstrated the utility of mesoporous carbons in dye removal considering adsorption uptake and rate.
Article
Engineering, Chemical
Mohammad Mehdi Salarirad, Ali Behnamfard, Francesco Veglio
Summary: Xanthate removal from aqueous solutions by activated carbon adsorption was studied in this research. The results indicated that activated carbon is a high-potential adsorbent for xanthate removal, with the adsorption primarily occurring on non-polar carbon surface patches driven by hydrophobic interactions. Adsorption process was found to be spontaneous and endothermic, with pore diffusion identified as the rate-limiting step.
DESALINATION AND WATER TREATMENT
(2021)
Article
Chemistry, Physical
Yi Qin, Bo Chai, Chunlei Wang, Juntao Yan, Guozhi Fan, Guangsen Song
Summary: A porous biochar prepared from recycled agricultural waste rape straw was used for the adsorption of tetracycline hydrochloride, showing favorable adsorption performance due to its graphite-like structures, abundant oxygen-containing functional groups, and large specific surface area.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Water Resources
Aloysius Akaangee Pam, Zul Adlan Mohd Hir, Abdul Halim Abdullah, Yen Ping Tan
Summary: This study established a novel approach for synthesizing a new adsorbent to remove Pb(II) ions from aqueous solution, showing good micropores structure and high surface area suitable for liquid phase adsorption. Langmuir model and pseudo-second-order equation were found to best fit the data, suggesting adsorption control by chemical reaction.
APPLIED WATER SCIENCE
(2021)
Article
Chemistry, Physical
Amutha Arul, S. Kavitha, Anand Babu Christus, Velappa Jayaraman Surya, A. Ravikumar, Yuvaraj Sivalingam
Summary: The study investigated the use of a cheap, high-efficiency, and eco-friendly adsorbent as an alternative to activated carbon coated Maghemite nanoparticles for removing lead and cadmium ions from aqueous solutions. The adsorbent showed good fit with Langmuir, Temkin and Freundlich isotherm models, and the maximum adsorption capacity for Pb (II) and Cd (II) ions was determined. The study also examined the kinetics and thermodynamics of adsorption, and demonstrated that Maghemite nanoparticle coated activated carbon derived from agricultural biomass is a promising option for removing metals from industrial effluents due to its cost-effectiveness, high efficiency, and environmental friendliness.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Adriana Popa, Aurelia Visa, Bianca Maranescu, Iosif Hulka, Lavinia Lupa
Summary: The study focused on the adsorption performance of modified chitosan with aminophosphonic groups and Ni(II) ions in removing Pb(II) ions from aqueous solutions, investigating the influence of pH, contact time, and Pb(II) ions concentration.
Article
Chemistry, Multidisciplinary
Ignacio Campello Gomez, Orlando F. Cruz Jr, Joaquin Silvestre-Albero, Carlos R. Rambo, Manuel Martinez Escandell
Summary: In this study, activated carbons were synthesized from different precursors using KOH and mixtures of KOH and KCl as activating agents. The addition of KCl was found to increase the surface area and activation yield in all the samples. Thermodynamic and mass spectrometry studies revealed that KCl did not act as an activating agent, but promoted the solubilization of secondary products, thereby enhancing the contact of KOH and carbon particles and increasing the activation efficiency. Based on mass spectroscopy results and thermodynamic calculations, four reactions were proposed as the most likely responsible for pore development during activation.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Engineering, Environmental
Catarina Helena Pimentel, Lidia Diaz-Fernandez, Diego Gomez-Diaz, Maria Sonia Freire, Julia Gonzalez-Alvares
Summary: Reducing the harmful impacts of CO2 emissions and greenhouse effect on climatic conditions is necessary. In this study, biochar and activated carbons were produced and characterized. The activated carbon activated at 600 degrees C with KOH at a ratio of 1:4 w/w showed the highest CO2 adsorption capacity and selectivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
