Article
Engineering, Chemical
Alireza Nasiri, Saeed Rajabi, Majid Hashemi, Habibeh Nasab
Summary: CuCoFe2O4@MC/AC, a highly powerful and magnetically separable nano-adsorbent, was synthesized using a novel microwave-assisted technique. The nanomagnetic adsorbent showed high adsorption efficiency for pollutants under optimal conditions. The adsorption process followed Freundlich and pseudo-second-order models. The reusability of the magnetic nano-adsorbent decreased slightly after multiple cycles. Toxicity and bioassay evaluations indicated the potential of CuCoFe2O4@MC/AC for antibiotic removal.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Applied
Mojtaba Safaviyan, Mehdi Faramarzi, Seyed Aboutaleb Mousavi Parsa, Hajir Karimi
Summary: In this study, a novel Cr(VI) adsorbent, TEPA-enriched MGO, was developed and characterized. The optimal parameters for Cr(VI) sorption, including Cr(VI)/MGOT ratio, temperature, and pH, were determined through Box-Behnken Design. The maximum adsorption capacity was found to be 287.15 mg/g. The Lagergren kinetic and Langmuir isotherm models accurately represented the adsorption process on MGOT. Based on the obtained results, MGOT was identified as an excellent reusable adsorbent for selective Cr(VI) sorption and magnetic separation from wastewater.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Engineering, Environmental
K. Khaledi, G. M. Valdes Labrada, J. Soltan, B. Predicala, M. Nemati
Summary: The development of a magnetized activated carbon adsorbent with improved separation efficiency for the removal of antibiotics from water was studied. The adsorbent exhibited competitive adsorption properties between TC and LM, and the process was endothermic. Non-isothermal fitting of the data into different adsorption models provided insights into the adsorption behavior of the system. Redlich-Peterson isotherm accurately predicted TC adsorption data at different temperatures, while the extended Langmuir model accurately predicted the binary adsorption system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Wenju Liu, Hongjuan Bai, Weiqiang Gao, Zihan Chen, Zhuangzhuang Liu, Zilong Chen, Junhang Chen
Summary: In this study, a renewable magnetic alginate composite containing graphene oxide (M-GO/Alg) was used to investigate the adsorption behavior of methylene blue (MB) and crystal violet (CV) in single and binary systems. The results showed that M-GO/Alg had high adsorption capacity for both dyes and exhibited no significant performance loss after multiple adsorption cycles. Additionally, M-GO/Alg could be easily separated under an external magnetic field, making it an eco-friendly and recyclable adsorbent for cationic dyes.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Haoyang Fu, Hongfei He, Runliang Zhu, Lan Ling, Weixian Zhang, Qingze Chen
Summary: A novel magnetic adsorbent, Mag@Fh-P, was successfully synthesized and shown to be effective in removing Cd(II) from water, soil, and sediment. The adsorbent exhibited fast adsorption rate, high adsorption capacity, and easy separation, making it a promising candidate for heavy metal cation removal applications.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Fan Yang, Can Jin, Sen Wang, Yujie Wang, Lu Wei, Longhui Zheng, Haiping Gu, Su Shiung Lam, Mu. Naushad, Cheng Li, Christian Sonne
Summary: Due to the increasing pollution of antibiotics in water, the development of green and efficient adsorbents is urgently needed. In this study, magnetic bamboo-based activated carbon (MDBAC) was prepared through delignification and carbonization using ZnCl2 as an activator. MDBAC demonstrated a large specific surface area (1388.83 m2 g-1) and showed excellent adsorption performance for sulfadiazine (SD), with an adsorption capacity of 645.08 mg g-1. The MDBAC biosorbent exhibited physicochemical stability, magnetic recovery, and recyclability properties, making it a promising candidate for removing antibiotic contaminants from wastewater.
Article
Engineering, Chemical
Jianfeng Zhang, De Wang, Ruya Cao, Jiaxing Li
Summary: A novel nanosphere composed of a magnetic h-Fe3O4 core and a phos-LDH shell was synthesized for the removal of uranium (VI). The nanocomposite exhibited rich phosphate groups and a large specific surface area, demonstrating excellent adsorption capacity under certain conditions. Furthermore, the use of an electromagnetic separation system assisted in the successful removal of U(VI) from soil.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Chemistry, Physical
Ajaz Ahmad Wani, Mohammad Shahadat, Syed Wazed Ali, Shaikh Ziauddin Ahammad, Mohammad Kashif Uddin
Summary: The development of advanced magnetic functional adsorbents has been widely studied for environmental cleanup technologies. Polymer-supported magnetic nanocomposite materials show great potential for removing radionuclides from aqueous solutions and can be combined with other nanomaterials to enhance their performance. The review highlights the significance and challenges of these materials, as well as the fundamental relationships between their composition, structure, and adsorption efficiency. Additionally, the application of advanced techniques allows for the one-step detection and removal of trace contaminants.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Deqi Wang, Huacai Ge
Summary: In this study, a polyethyleneimine functionalized magnetic graphene oxide adsorbent was successfully synthesized and characterized. The adsorbent showed higher uptake for Hg(II) compared to other ions, and the adsorption process was fast, endothermic, and temperature-dependent. The maximal uptake of Hg(II) was higher than previous reports, and the adsorbent exhibited excellent performance for Hg(II) removal from simulated wastewater. Furthermore, the adsorbent could be easily separated and recycled using a magnet. This research highlights the promising potential of this novel adsorbent for the removal of Hg(II) from wastewater.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Chengyue Yang, Jinwen Jiang, Ying Wu, Yong Fu, Yu Sun, Feng Chen, Guiyang Yan, Jianshe Hu
Summary: This study developed a cheap and effective magnetic composite adsorbent with highly selective adsorption of mercury(II) ions, which could be described by the pseudo-second-order kinetic model and Langmuir model, demonstrating good reusability and selectivity.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Changkun Ding, Man Xue, Yuxin Zhang, Jieliang Su, Hua Wang
Summary: Developing a novel chitosan porous microsphere with outstanding adsorption performance and magnetic separation function is significant for recycling and purification in wastewater treatment applications. Magnetic chitosan/GO@Fe3O4 porous microspheres (MCMS) were fabricated by incorporating magnetic graphene oxide nanocomposite (MGN), which significantly improved the adsorption performance of MCMS microspheres. MCMS showed excellent magnetic separation performance and enhanced thermal stability.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Biochemistry & Molecular Biology
Ru Jiang, Ting-Ting Shen, Hua-Yue Zhu, Yong-Qian Fu, Sheng-Tao Jiang, Jian-Bing Li, Jian-Ling Wang
Summary: The limitations of traditional chitosan-based adsorbents in wastewater treatment include low water solubility in acid solution, relative low adsorption capacities, and unsatisfactory separation performance. To overcome these limitations, hydrophilic magnetic Fe3O4 embedded chitosan-crosslinked-polyacrylamide composites (m-CS-c-PAM) were synthesized. The m-CS-c-PAM showed excellent adsorption capacity and pH-independent adsorption capability for food dye, along with easy separation and satisfactory reusability. It can be considered as a promising material for food wastewater treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Xuan Zhou, Can Jin, Guifeng Liu, Guomin Wu, Shuping Huo, Zhenwu Kong
Summary: This study demonstrates the tunable covalent binding of lignin onto amine-functionalized magnetic nanoparticles for the removal of heavy metal pollutants from wastewater. The synthesized lignin-based magnetic adsorbents showed different adsorption performance towards Pb(II) with varying ratios of AMNP/lignin. The magnetic cores in the network facilitated the fast recovery of the magnetic adsorbents after the adsorption process, with good superparamagnetic properties.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Biotechnology & Applied Microbiology
Pravin D. Patil, Radhika K. Kelkar, Neha P. Patil, Pradnya V. Pise, Sadhana P. Patil, Arundhatti S. Patil, Nishant S. Kulkarni, Manishkumar S. Tiwari, Ajay N. Phirke, Shamraja S. Nadar
Summary: The use of organic-inorganic hybrid nanoflowers as support material for enzyme immobilization has become popular due to their stability, ease of preparation, and enhanced catalytic activity. However, their low density and high dispersion make them difficult to handle and separate. Magnetic nanoflowers have emerged as a promising alternative platform for enzyme immobilization due to their easy separation, structural stability, and ability to enhance catalytic efficiency. This review focuses on different methods for designing magnetic nanoflowers, examples of enzymes immobilized in magnetic nanoflowers, their applications, and ways to improve material properties for enhanced catalytic activity, structural stability, and scalability.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2023)
Article
Chemistry, Applied
Jie Sun, Lihua Cui, Yuhan Gao, Yuzhe He, Huaqing Liu, Zhujian Huang
Summary: The magnetic cellulose adsorbent extracted from Pennisetum sinese Roxb straw has shown promise in efficiently removing antibiotic tetracycline (TC) from water, highlighting its potential environmental benefits and practical application prospects.
CARBOHYDRATE POLYMERS
(2021)
Review
Chemistry, Multidisciplinary
Phan Gia Le, Moon Il Kim
Summary: The evolution of biofuel cells can be categorized into microbial biofuel cells, enzymatic biofuel cells, and nanozyme-based biofuel cells. MBFCs can produce electricity from waste with low power output, while EBFCs are vulnerable under diverse environmental conditions. NBFCs using nanozymes have advantages such as high stability and low synthesis cost, making them attractive for developing wearable and implantable devices for electricity generation.
Article
Biochemistry & Molecular Biology
Xuan Ai Le, Thao Nguyen Le, Moon Il Kim
Summary: In this study, a hybrid nanoflower-based strategy was developed for the sensitive fluorescent detection of biothiols. The nanoflowers exhibited dual catalytic activities and were successfully used to selectively detect and quantify biothiols in human serum, showing great potential for clinical diagnostics.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Weldejewergis Gebrewahid Kidanu, Jaehyun Hur, Hyung Wook Choi, Moon Il Kim, Il Tae Kim
Summary: In this study, VO2 nanorods were successfully synthesized using a hydrothermal method and transformed into V2O5.nH(2)O through an electrochemical oxidation technique. The aqueous zinc-ion full cell based on VO2@C/Zn showed remarkable reversible capacity, cycling stability, and rate capabilities.
JOURNAL OF POWER SOURCES
(2022)
Article
Biochemical Research Methods
In Hwa Jeong, Ho Kyeong Kim, Hye Ri Kim, Jungbae Kim, Byoung Chan Kim
Summary: In this study, an aptamer CB-5 that can specifically bind to C. braakii was rapidly isolated using a centrifugation-based partitioning method. The CB-5 aptamer showed high binding affinity and specificity for C. braakii, indicating its potential use as a reliable diagnostic receptor for airborne bacteria.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Review
Chemistry, Physical
Phan Gia Le, Qilu Wu, Do Yun Kong, Jun Ge, Moon Il Kim
Summary: Enzymatic biofuel cells (EBFCs) are promising power sources for generating electrical power through biomolecules. However, their practical usage is limited by low power output and short lifetime. Nanostructured supports, such as nanocarbons, nanoparticles, and polymeric nanofibers, offer potential solutions to enhance the performance and stability of EBFCs. This review discusses the roles of nanostructured supports and catalytic mechanisms in EBFCs, as well as recent research progress and future prospects.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Analytical
Hye Ri Kim, Byoung Chan Kim
Summary: In this study, a newly proposed sequential partitioning method was used to isolate specific aptamers for all seven species of Cronobacter. This method avoided repeated enrichment steps and reduced the selection time compared to the conventional SELEX process. Four aptamers with high affinity and specificity for Cronobacter were successfully isolated, and they could effectively detect Cronobacter in contaminated PIF.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Yejin Park, Thinh Viet Dang, Uiseok Jeong, Moon Il Kim, Jinsik Kim
Summary: Research on nucleic acid aptamers has been focused on enhancing bioassay performance. This study proposes graphene oxide-based electrical and optical analyses to evaluate the affinity between aptamers and their targets efficiently. The results demonstrate that both electrical and optical approaches are effective in detecting thrombin with high sensitivity.
Article
Chemistry, Analytical
Trung Hieu Vu, Phuong Thy Nguyen, Moon Il Kim
Summary: Surface engineering of nanozymes can enhance their catalytic activity and stability. Polydopamine-coated Co3O4 nanoparticles were synthesized and exhibited catalase-like activity and improved stability. The presence of sulfide ions significantly inhibited the activity of these nanoparticles, allowing for sensitive detection of sulfide ions based on their reduced catalytic activity.
Article
Chemistry, Analytical
Oleksandr Tsymbalenko, Soyoung Lee, Yong-Min Lee, Yun-Sik Nam, Byoung Chan Kim, Jin Young Kim, Kang-Bong Lee
Summary: A highly sensitive and selective NH3 gas sensor was developed by doping single-layer pristine graphene with copper(II) oxide (CuO) nanoparticles. CuO nanoparticles of approximately 15 nm were synthesized and doped onto graphene using a simple spin coating method. NH3 gas reacts with the oxygen species on the graphene surface, causing a change in graphene's valence channel and resistivity. The sensor exhibited a resistivity response of approximately 83% and fast response and recovery times.
Article
Chemistry, Multidisciplinary
Phan Ba Khanh Chau, Trung Hieu Vu, Moon Il Kim
Summary: This article reports a fluorescent assay for the determination of VB12 based on the inner filter effect of PDT-AgNPs. The fluorescence of PDT-AgNPs is significantly quenched in the presence of VB12 via IFE, allowing for quantitative detection of VB12 in drug tablets.
Article
Chemistry, Analytical
Phan Ba Khanh Chau, Thinh Viet Dang, Moon Il Kim
Summary: We synthesized crystalline MnOOH nanowires (MNWs) via a simple solvothermal treatment of KMnO4, which exhibited excellent oxidase-like activity due to the presence of pure Mn3+ sites. MNWs catalyzed the rapid oxidation of dopamine into aminochromes, resulting in a vivid brown color. Based on the catalytic features of MNWs, we developed a paper dipstick for the one-step colorimetric detection of dopamine.
Article
Chemistry, Analytical
Jeong Ah Park, Yein Kwon, Xuan Ai Le, Trung Hieu Vu, Hanbin Park, Hoseok Lee, Hye Kyu Choi, Chulhwan Park, Moon Il Kim, Taek Lee
Summary: This study developed a rapid electrochemical biosensor using nanozymes and aptamers for the detection of microcystin-LR (MC-LR). The detection time was reduced to 10 minutes using alternating current electrothermal flow (ACEF). The sensitivity of MC-LR detection was improved by using MnO2/MC-LR aptamer conjugates. The study achieved an LOD of 3.36 pg mL(-1) in the linear concentration range of 10 pg mL(-1) to 1 mu g mL(-1).
