Article
Environmental Sciences
Yingzhou Chen, Jinyan Yang, Adil Abbas
Summary: Surface chemical modification allows for the rational construction of biochar with desirable structures and functionalities for environment purification. Fruit-peel-derived adsorbing material has been well studied in the adsorption of heavy-metal removal due to its abundance and non-toxicity. In this study, engineered biochar prepared from fruit waste via chemical modification was explored for its potential application in removing chromium (Cr) from an aqueous solution.
Article
Engineering, Chemical
Chenghong Wang, Anlun Jiang, Xinlei Liu, Kok Yuen Koh, Yi Yang, J. Paul Chen, Kang Li
Summary: Water pollution is a significant environmental issue and addressing the remediation of oxyanion pollutions is crucial. In this study, a water stable metal-organic framework was prepared and demonstrated great efficacy in removing oxyanion pollutants in wastewater. The amorphized framework showed enhanced adsorption capacities and excellent reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Christopher M. M. Wintersinger, Dionis Minev, Anastasia Ershova, Hiroshi M. M. Sasaki, Gokul Gowri, Jonathan F. F. Berengut, F. Eduardo Corea-Dilbert, Peng Yin, William M. M. Shih
Summary: Living systems can self-assemble at different length scales, and DNA origami techniques have enabled the self-assembly of submicron-scale shapes. By extending the crisscross polymerization strategy to DNA origami slats, custom multi-micron shapes with nanoscale surface patterning can be fabricated. This method allows for the production of complex structures composed of thousands of sophisticated and precisely designed origami slats.
NATURE NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Juan Pablo Castrejon Martinez, Maura Casales-Diaz, Jose Juan Ramos-Hernandez, Tathagata Kar, Srinivas Godavarthi, Manuela Calixto Rodriguez, Mohan Kumar Kesarla
Summary: The hydothermally prepared carbonaceous composite (GCNCS) of graphitic carbon nitride (g-C3N4) and carbon spheres showed efficient photoreduction and simultaneous removal of Cr(VI) from water under visible light. The maximum adsorption capacity for GCNCS was estimated to be 333.33 mg/g, and the efficiency remained constant after five continuous cycles. The successful photo-reduction and removal of Cr(VI) with GCNCS can be attributed to the g-C3N4/carbon spheres heterojunction structure.
Article
Chemistry, Physical
Sasthi Charan Mandal, Jaydeb Chakrabarti
Summary: In this study, molecular dynamics simulations enhanced by umbrella sampling were conducted to investigate the interaction between glucose and four common surfaces of ZnO ((1010), (1120), (0001), and (0001)). The results showed that the hydration layers above the surfaces significantly influenced the approach of glucose. Potential of mean force calculations revealed that the (1010) surface had the strongest adsorption free energy towards glucose (-6.81 kJ mol(-1)). Therefore, our study offers a theoretical understanding of the nano-bio junction between glucose and ZnO surfaces, suggesting that the (1010) surface could be used for fabricating a direct glucose sensor.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Dimitrios Evangelou, Anastasia Pournara, Charikleia Tziasiou, Evangelos Andreou, Gerasimos S. Armatas, Manolis J. Manos
Summary: In this study, a new robust metal-organic framework (MOF) called Al-MOF-1 was synthesized and characterized. Al-MOF-1 demonstrated excellent stability in a wide pH range and high selectivity towards oxoanionic species. It also showed promising applications in wastewater treatment and as a luminescence sensor for detecting trace amounts of metal ions.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zobia Razzaq, Muhammad Hamayun, Shahzad Murtaza, Samia Kausar, Ataf Ali Altaf, Rizwan Ullah Khan, Tehzeen Javaid
Summary: This study investigates the use of activated carbons from virgin banana peduncle (ZR1) and iron-impregnated banana peduncle (ZR2) as adsorbents for the removal of As(V) and Cr(VI) ions from aqueous solutions. The adsorbents were characterized and the effects of various factors on metal ion adsorption were studied. The results showed that ZR1 and ZR2 had good adsorption capacities for both As(V) and Cr(VI) ions. Kinetic and thermodynamic parameters demonstrated the feasibility of the adsorption process, making ZR1 and ZR2 promising and cost-effective biosorbents for removing As(V) and Cr(VI).
Article
Polymer Science
Konstantin A. Milakin, Oumayma Taboubi, Jirina Hromadkova, Patrycja Bober
Summary: Polypyrrole-gelatin aerogels containing magnetic barium ferrite particles were synthesized and used for the removal of Cr(VI) from aqueous media. The optimal pH for adsorption was found to be 4, due to the dominance of HCrO4- species and its better adsorption and reduction compared to CrO42-. The presence of magnetic particles did not affect the adsorption performance of the aerogels. The adsorption mechanism involved electrostatic interaction between chromium and the adsorbent.
Article
Environmental Sciences
Lingling Wang, Dionysios D. Dionysiou, Jianming Lin, Yuxian Huang, Xiaolan Xie
Summary: The research found that humic acid and Cr(VI) displayed synergy in their removal process by ZnO-30N-zeolite, accelerating the removal of humic acid significantly while not affecting the removal capacity of Cr(VI). This study proposed a kinetic mechanism for the synergistic removal of humic acid and Cr(VI) by ZnO-30N-zeolite in a binary pollutant system.
Review
Engineering, Environmental
Xiaowei Xing, Njud S. Alharbi, Xuemei Ren, Changlun Chen
Summary: This paper provides a systematic and comprehensive overview of the research on chromium removal using adsorption method. It covers the various adsorbent materials, determination methods and adsorption mechanisms of chromium, and summarizes the current problems and development directions in the field.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Polymer Science
Daniel J. Da Silva, Derval S. Rosa
Summary: In this study, cellulose nanofibers (CNFs) and citric acid were used to prepare a new type of porous foam material, and the effects of citric acid content and heat treatment on the foam properties were investigated. The results showed that increasing the citric acid content slightly enlarged the pore size and reduced the activation energy for cellulose thermal decomposition in the foam. Heat treatment only significantly affected the release rate of cellulose. The mechanical behavior of the foam changed after wetting. The foam exhibited a two-step mechanism for chromium adsorption and had suitable water resistance for applications as an adsorbent in aqueous media.
Article
Environmental Sciences
Ismail W. Almanassra, Tareq Al-Ansari, Ihsanullah Ihsanullah, Viktor Kochkodan, Anjaneyulu Chatla, Muataz Ali Atieh, Abdallah Shanableh, Tahar Laoui
Summary: In this study, the adsorptive removal of chromium (Cr) from water by carbide-derived carbon (CDC) was investigated. The results showed that the CDC exhibited a notable adsorption capacity, stability, and reusability for Cr ions. The study also revealed the potential of CDC in removing Cr ions from real brackish water, with both physical and chemical adsorption processes occurring and electrostatic interactions playing a major role in the adsorption.
Article
Environmental Sciences
Asha Singh, Dinesh Arora, Renu Bala, Anil Khokhar, Sunil Kumar
Summary: In this study, nanoparticles prepared from aquatic plants Salvinia molesta and Typha latifolia were loaded onto powdered form to create nanocomposite adsorbents for wastewater treatment. The adsorption capacity, optimal working conditions, and mechanisms of the novel adsorbents were evaluated.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Shiqi Han, Xuelei Zhou, Honghao Xie, Xiaohong Wang, Lingze Yang, Huili Wang, Chen Hao
Summary: In this study, a chitosan-based microsphere biosorbent with high adsorption capacity and short adsorption equilibrium time for hexavalent chromium was successfully prepared using an adsorption method.
Article
Chemistry, Multidisciplinary
David Gomez-Carnota, Jose L. Barriada, Roberto Herrero
Summary: Rising manufacturing costs due to the current global situation have made cost-effective waste management necessary. This study successfully synthesized a sodium silicate polymeric material functionalized with iron through an environmentally friendly process. The material showed promising decontamination performance and can be utilized for pollution prevention in effluent discharges.
