Article
Chemistry, Multidisciplinary
Davoud Balarak, Amir Hossein Mahvi, Saeideh Shahbaksh, Md A. Wahab, Ahmed Abdala
Summary: This study investigated the adsorptive removal of azithromycin from reclaimed water using activated porous carbon prepared from Azolla filiculoides. The AFAC showed high efficiency in removing azithromycin, indicating its potential as a low-cost adsorbent for AZM in aqueous solutions.
Article
Biochemistry & Molecular Biology
Ming Li, Panpan Zhang, Xuemeng Zhang, Qian Chen, Qianyong Cao, Yuling Zhang, Huining Xiao
Summary: Mercury pollution in aqueous solutions is a significant environmental concern with potential health risks. This study presents a one-pot synthesis of a bis-Schiff base cellulosic adsorbent that combines large adsorption capacity and excellent fluorescent recognition for mercury ions. The adsorption experiments show specific affinity between sulfydryl-containing cellulosic nanocrystals and mercury species, with a high adsorption capacity of 624.8 mg/g at room temperature. The material also exhibits a 19-fold enhancement in selective fluorescence sensing when exposed to mercury. Additionally, the bifunctional adsorbent material demonstrates high sensitivity towards mercury ions in aqueous solutions with detection limits of 8.29 x 10-8 M for fluorescence and 5.9 x 10-9 M for UV-vis spectrum. The adsorption process follows a pseudo-second order kinetics and density functional theory studies offer insights into the adsorptive and responsive mechanisms.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Environmental Sciences
Yi Fang, Ke Yang, Yipeng Zhang, Changsheng Peng, Aurora Robledo-Cabrera, Alejandro Lopez-Valdivieso
Summary: The efficiency of Cr(VI) removal by ballmilled highly activated carbon (HAC) under neutral conditions was significantly improved due to the increased content of surface acid functional groups. Two mechanisms for Cr(VI) removal were proposed, involving reduction of Cr(VI) to Cr(III) and formation of chromium hydroxides on the surface of HAC, as well as bonding of CrO42- on the surface COOH groups.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Physical
Farideh Gheitasi, Shahriar Ghammamy, Mojgan Zendehdel, Farzam Babaei Semiromi
Summary: In this study, thiol magnetic activated carbon adsorbent (mPAC-SH) was prepared through dual-stage chemical activation of activated carbon from beer barley husk (PAC) and subsequent magnetization with Fe3O4. The prepared adsorbent exhibited high efficiency in removing mercury (II) from wastewater. The optimal conditions for mercury (II) removal were found to be pH 6, mercury (II) concentration of 20 mg/L, adsorbent dose of 0.4 g/L, and contact time of 60 min, resulting in a removal rate of 99.44%. The adsorption mechanism followed the Freundlich isotherm adsorption model, and the kinetic data was best described by the pseudo-second-order kinetics equation. Thermodynamic analysis showed that the adsorption of mercury (II) ions was endothermic and spontaneous. The mPAC-SH magnetic nanocomposite exhibited good reusability after five successive adsorption-desorption cycles without significant loss of adsorption capacity.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Engineering, Chemical
Liu He, Yiyang Qiu, Chu Yao, Guojun Lan, Na Li, Huacong Zhou, Quansheng Liu, Xiucheng Sun, Zaizhe Cheng, Ying Li
Summary: This paper investigates the role of intrinsic defects on Hg2+ adsorption for carbon adsorbents. The maximum adsorbing capacity of defect-rich carbon has been improved, and the basicity is increased with the content of defective sites. The study provides a direction to explore cheap and easily scale-up high-performance mercury adsorbents.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Aysan Ghahremani, Mehrdad Manteghian, Hamid Kazemzadeh
Summary: In this study, a novel pervaporation technique was used to impregnate nano-activated carbon on lightweight expanded clay aggregate. Various analyses were conducted to investigate the structure and morphology of the adsorbent, and the impact of different parameters on its performance was studied, resulting in maximum lead removal efficiency achieved at pH=6.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Che-Jung Hsu, Yan-Ze Xiao, Hsing-Cheng Hsi
Summary: Seawater flue gas desulfurization is effective in controlling sulfur dioxide emissions and removing mercury from coal-fired power plant flue gases. However, issues such as environmental impact and re-emission of gaseous mercury need to be addressed. The study found that copper/sulfur co-impregnated activated carbon can capture aqueous mercury and inhibit gaseous mercury re-emission effectively.
Article
Environmental Sciences
Chao Geng, Ruikang Lin, Peilin Yang, Pengfei Liu, Li Guo, Bo Cui, Yishan Fang
Summary: N-doped carbon materials with 3D porous-layered structure were synthesized for the first time through a one-step co-pyrolysis method using corn starch, melamine, and metal catalysts (Ni (II) and Mn (II)). The resulting 3D-NC exhibited a heterogeneously meso-macroporous surface and a hierarchically connected sheet structure. Adsorption experiments showed that the 3D-NC had a high selectivity for Hg (II) and could adsorb it within 90 minutes with a maximum capacity of 403.24 mg/g at 293 K, pH = 5. The adsorption mechanism involved physical adsorption, electrostatic attraction, chelation, and ion exchange. Thermodynamic study indicated that the adsorption process was spontaneous, endothermic, and random. Furthermore, the 3D-NC demonstrated excellent regeneration and recovery after adsorption-desorption cycles, making it a promising material for Hg (II) remediation in contaminated wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Wei Hu, Yaolan Niu, Kun Dong, Dunqiu Wang
Summary: This study developed a highly efficient and low-cost activated carbon (BAC-600) derived from bagasse, which was used for the removal of sulfamethoxazole (SMZ) from water. The adsorption conditions were optimized using response surface methodology (RSM) with a Box-Behnken design (BBD). BAC-600 exhibited excellent adsorption performance, fitting well with the pseudo-second-order model. The adsorption mechanism of SMZ on BAC-600 involved hydrogen bonding, electrostatic interaction, and p-p interaction. This research provides a potential solution for eliminating environmental pollution caused by antibiotics in water.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Biotechnology & Applied Microbiology
A. Wang, C. Liu, X. Ge, W. Meng, Y. Pi, C. Liu
Summary: The study evaluated the adsorption behavior and mechanisms of surface modified activated carbon with bacteria. Results showed that modified activated carbon had high adsorption efficiency under weakly acidic pH, with adsorption capacity increasing with temperature. The adsorption of Congo red by bacteria surface modified activated carbon fitted well with the Langmuir's model, and the process was endothermic with physical adsorption as the main driving force.
JOURNAL OF APPLIED MICROBIOLOGY
(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
Agustin Spaltro, Matias N. Pila, Diego D. Colasurdo, Emilia Noseda Grau, Gabriel Roman, Sandra Simonetti, Danila L. Ruiz
Summary: The presence of pharmaceutical residues in aquatic environments is a global issue, with the high consumption of Paracetamol leading to continuous discharge in water bodies. This study focused on the removal of Paracetamol using adsorption technique with different adsorbents, revealing higher adsorption in acidic pH and increased adsorption capacity with higher ionic strength. Experimental data fitted well with pseudo-second order and Langmuir models, while density functional theory provided atomistic details on the adsorption mechanism.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Engineering, Chemical
Bhaswati Devi, Netra Prova Baruah, Anasuya Bharadwaj, Arundhuti Devi
Summary: Elimination of excessive fluoride from the environment is a serious issue nowadays. In this study, a novel activated carbon supported tetrametallic oxide hybrid system was developed for fluoride removal. The adsorption performance of the system was investigated and it was found to follow Freundlich isotherm and pseudo-second order kinetics, indicating both physical and chemical adsorption mechanisms.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Environmental
Jordana Georgin, Katia da Boit Martinello, Dison S. P. Franco, Matias S. Netto, Daniel G. A. Piccilli, Edson Luiz Foletto, Luis F. O. Silva, Guilherme Luiz Dotto
Summary: In this study, a novel porous adsorbent was generated from jabuticaba fruit peels through pyrolysis with zinc chloride, showing a high adsorption capacity for naproxen in aqueous solutions. The activated carbon exhibited excellent pore characteristics, leading to effective removal of naproxen and other drugs from synthetic mixtures. This environmentally friendly adsorbent has the potential to be utilized for wastewater treatment containing pharmaceuticals.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Saadia M. Waly, Ahmad M. El-Wakil, Weam M. Abou El-Maaty, Fathi S. Awad
Summary: The newly developed chelating adsorbent AT-MAC effectively removed Pb(II) and Hg(II) ions from polluted water, demonstrating high sorption capacities and excellent selectivity. The success of AT-MAC in solid phase extraction shows promising potential for environmental remediation.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2021)