Article
Environmental Sciences
Miao Lv, Dongyi Li, Zhaohan Zhang, Bruce E. Logan, Guohong Liu, Muchen Sun, Changchao Dai, Yujie Feng
Summary: The research found that MPAC6 with a Fe3O4 content of 14.3 wt% exhibited the best performance in adsorbing SMX and magnetic properties. The adsorption process showed spontaneous and exothermic characteristics, accompanied by an increase in entropy. Sustainable magnetic adsorbents showed good removal efficiency for SMX in the pH range of 2-4.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Given the large amount of harmful pharmaceuticals being released into the water stream, it is crucial to eradicate or reduce these chemicals to a minimum permissible limit. This study reports the fabrication of a magnetic guar gum graphene oxide nano-composite (mGG/GO NC) for the adsorption of ciprofloxacin from wastewater. Various techniques were used to characterize the guar gum and the nanocomposite, and it was found that the adsorption process followed the pseudo second order model and Langmuir isotherm model. The nanocomposite exhibited high adsorption capacity and recyclability, potentially due to a synergistic effect of multiple interactions in the adsorption mechanism.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Maryam Helmi, Farzad Moazami, Alireza Hemmati, Ahad Ghaemi
Summary: In this study, Fe3O4 nanoparticles were incorporated onto graphene oxide (GO) layers to maintain the surface area of GO, while GO-Fe3O4 maintained their nanostructure. A 0.1 N KOH solution was added to enhance the alkaline nature of GO-Fe3O4 using an impregnation method. The adsorbent exhibited a mesoporous structure with a pore diameter of 15.05 nm according to Brunauer-Emmett-Teller analysis. The adsorption capacity of CO2 was highest at 6.812 mmol/g when using 0.5 g of adsorbent at 298 K and 9 bar, and the adsorption mechanism was physisorption between the active sites of KOH@GO-Fe3O4 and CO2 molecules.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Rahmi, Muhammad Iqhrammullah, Ulfa Audina, Husni Husin, Haya Fathana
Summary: A film adsorbent OC/Chi-EDTA was prepared from OPEFB-based charcoal through a simple phase inversion technique, showing advantageous properties for Cd (II) adsorptive removal. The material exhibited high tensile strength, adsorption capacity, and thermal stability, with successful adsorption mechanisms of electrostatic attraction and complexation for Cd (II) uptake.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Chemistry, Physical
Zheng Zhang, Ruilu Yang, Yaping Zheng, Haipeng Bai, Jian Shi, Jian Zhang, Xiaolan Zhou, Meng Cai, Susu Fan, Chunjian Li
Summary: In this study, a graphene oxide-Fe3O4 nanocomposite with high aniline adsorption capacity was successfully prepared. The adsorption of aniline by s-GO-Fe3O4 involves a combination of pi-pi interaction, acid-base reaction, and hydrogen bonds. The nanocomposite follows the pseudosecond-order kinetics model and Freundlich isotherm model during the adsorption of aniline.
COLLOID AND POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Rauf Foroutan, Seyed Jamaleddin Peighambardoust, Amir Ahmadi, Ali Akbari, Sima Farjadfard, Bahman Ramavandi
Summary: The study enhanced the adsorptive performance of hydroxyapatite (HAp) using Fe3O4 magnetic nanoparticles and polydopamine (PDA), effectively removing Hg(II), Co(II), and Ni(II). The adsorption process was most efficient at pH 6, following Langmuir and Freundlich models, with a physical mechanism for removal. The composite material showed promising results in removing toxic metals from water sources.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Sushma Yadav, Anupama Asthana, Ajaya Kumar Singh, Rupa Chakraborty, S. Sree Vidya, Md. Abu Bin Hasan Susan, Sonia A. C. Carabineiro
Summary: The study successfully synthesized novel polymer gel beads with magnetic properties and high adsorption capacity, showing excellent removal efficiencies for pollutants like dyes, drugs, and metals. The beads can be regenerated and used multiple times without loss of adsorption capacity, making them promising adsorbents for large-scale applications in environmental remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Wei Wang, Shuangxi Zhou, Rui Li, Yongjun Peng, Chang Sun, Mohammadtaghi Vakili, Gang Yu, Shubo Deng
Summary: A study investigated the use of a magnetic powdered carbon adsorbent for TCPP removal, finding that the Fe3O4 content impacted adsorption and degradation performance. While higher Fe3O4 content improved TCPP adsorption, maintaining magnetic separation ability was crucial for effective removal.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Shuangyang Zhao, Meixi Li, Jie Ding, Shanshan Yang, Yani Zang, Yan Zhao, Xinlei Gao, Nanqi Ren
Summary: The study successfully removed AQs from water using a synthesized rGO/Fe3O4 adsorbent, revealing the adsorption mechanism of AQ2S and achieving regeneration of the adsorbent as well as recycling of AQ2S and solvent through Soxhlet extraction and rotary evaporation.
Article
Materials Science, Multidisciplinary
Anargha P. Nambiar, Rahul Pillai, Yugesh Vadikkeettil, Mallika Sanyal, Pranav S. Shrivastav
Summary: Poly(vinyl alcohol) and halloysite nanotube composite films were prepared using a solution casting methodology for enhanced adsorption of methylene blue dye. The study showed effective adsorption under optimized conditions, with good fitting of adsorption isotherms and kinetic models to the experimental data.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Tusunniyaze Maimaiti, Ruonan Hu, Huahui Yuan, Chengzhuang Liang, Fangshi Liu, Qun Li, Suke Lan, Baowei Yu, Sheng-Tao Yang
Summary: A magnetic Fe3O4/TiO2/graphene sponge (MFTGS) was designed for dye adsorption in aqueous solution, showing good adsorption capacity and easy regeneration. MFTGS reached adsorption equilibrium quickly and was driven by entropy production.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Physical
Xiaoming Wang, Jinlu Lian, Yonghao Wang, Xinying Zhang, Weizhen Liu, Yongjing Wang
Summary: Recently, the non-radical oxidation routes in Fenton-like systems have attracted much attention. In this study, a novel non-radical pathway is discovered in the degradation of phenol using H2O2 as the oxidant and graphene oxide-Fe3O4 composite as the catalyst. The kinetics investigation suggests the existence of different catalytic processes, and the non-radical route is confirmed by ESR spectra. This study provides insights into the adsorption-dependent catalytic Fenton-like degradation.
SURFACES AND INTERFACES
(2022)
Article
Green & Sustainable Science & Technology
Yanyan Liu, Xiaoxiao Xie, Jie Wang, Jun Tao, Yaru Li, Xiaochun Ye, Kai Xu
Summary: The article investigates the adsorption characteristics of aqueous Cr(VI) biochar by magnetic ?Fe2O3/Fe3O4/NaOH lotus stem biochar (SMBC). SMBC was successfully prepared with a saturation magnetization of 66.608 emu/g and a BET specific surface area of 239.56 m(2)/g. The adsorption isotherm study showed that the theoretical maximum adsorption capacity of SMBC for Cr(VI) was 196.270 mg/g. The adsorption mechanism of SMBC to Cr(VI) mainly included electrostatic interaction, redox, and complexation. Desorption and regeneration experiment results showed that SMBC could be easily recycled from the solution under the force of an external magnetic field, with about 80% of the original adsorption capacity maintained after six cycles.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Biochemistry & Molecular Biology
Ahmed M. Omer, Mohamed El-Sayed, Eman M. Abd El-Monaem, Gehan M. El-Subruiti, Abdelazeem S. Eltaweil
Summary: A new composite material has been developed for removing toxic lead ions from water bodies. The composite exhibits fast adsorption and high removal efficiency of lead ions, and maintains a high removal efficiency even after multiple adsorption cycles. The results of the study suggest the promising application potential of the composite material.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Kam Sheng Lau, Nur Alia Sahira Azmi, Siew Xian Chin, Sarani Zakaria, Chin Hua Chia
Summary: Textile industrialization leads to water pollution from the discharge of industrial effluents. Adsorption is one method to remove pollutants from wastewater, but has limitations in terms of reusability and ionic selective adsorption. In this study, PSS-incorporated chitosan beads were synthesized and showed good adsorption capacity for methylene blue dye. The beads also demonstrated good regeneration with sodium hydroxide, allowing for multiple reuse cycles for adsorption.
