The presence of heavy metal, chromium (VI), in water environments leads to various diseases in humans, such as cancer, lung tumors, and allergies. This review comparatively examines the use of several adsorbents, such as biosorbents, activated carbon, nanocomposites, and polyaniline (PANI), in terms of the operational parameters (initial chromium (VI) concentration (C), temperature (T), pH, contact time (t), and adsorbent dosage) to achieve the Langmuir's maximum adsorption capacity (q) for chromium (VI) adsorption. The study finds that the use of biosorbents (fruit bio-composite, fungus, leave, and oak bark char), activated carbons (HCl-treated dry fruit waste, polyethyleneimine (PEI) and potassium hydroxide (KOH) PEI-KOH alkali-treated rice waste-derived biochar, and KOH/hydrochloric acid (HCl) acid/base-treated commercial), iron-based nanocomposites, magnetic manganese-multiwalled carbon nanotubes nanocomposites, copper-based nanocomposites, graphene oxide functionalized amino acid, and PANI functionalized transition metal are effective in achieving high Langmuir's maximum adsorption capacity (q) for chromium (VI) adsorption, and that operational parameters such as initial concentration, temperature, pH, contact time, and adsorbent dosage significantly affect the Langmuir's maximum adsorption capacity (q). Magnetic graphene oxide functionalized amino acid showed the highest experimental and pseudo-second-order kinetic model equilibrium adsorption capacities. The iron oxide functionalized calcium carbonate (IO@CaCO) nanocomposites showed the highest heterogeneous adsorption capacity. Additionally, Syzygium cumini bark biosorbent is highly effective in treating tannery industrial wastewater with high levels of chromium (VI).
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http://dx.doi.org/10.1016/j.heliyon.2023.e15575 | DOI Listing |
Front Cell Infect Microbiol
December 2024
Gynaecology Department, Hua County People's Hospital, Anyang, China.
Introduction: The irrational use of antibiotics has facilitated the emergence of multidrug- resistant ., undermining the effectiveness of the currently available antibiotics. Consequently, there is an urgent need to explore new approaches, with phage therapy emerging as a promising alternative.
View Article and Find Full Text PDFJ Phys Chem B
December 2024
Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China.
As a predictive tool, quantum chemical calculations can be used to design protic ionic liquids (PILs) and predict the result. By adding anionic negative potential sites, two dual-functional PILs diethylenetriamine-barbituric acid [CHN][CHNO] and diethylenetriamine-ethylenolactonium [CHN][CHNO] were designed. The simulation results indicated that multisite absorption of anions and cations resulted in an expected absorption ratio exceeding 3:1 (mol CO:mol ILs).
View Article and Find Full Text PDFSmall
December 2024
Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, 721302, India.
The separation and purification of acetylene from the light hydrocarbon gas mixtures is considered as one of the most industrially challenging task for the production of fine chemicals. Though metal-organic frameworks (MOFs) are promising candidates for such separation and offer a cost and energy-efficient pathway, achieving the trade-off between sorption capacity and separation selectivity along with framework robustness is a daunting task and demands effective design. Herein, a new 3D chemically stable MOF, IITKGP-24 (stable over a wide range of aqueous pH solution, pH = 2-12) is developed, displaying excellent separation selectivity of 13.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
Institute of Applied Physics and Computational Mathematics, Beijing 100088, PR China.
The primary challenge hindering the widespread adoption of hydrogen energy is its storage, highlighting the need for effective storage media. In this study, we utilize first-principles calculations to systematically evaluate the superalkali cluster OLi decorated on a CN monolayer for its potential as an efficient hydrogen storage material. Our findings reveal that the OLi cluster binds to each side of the CN monolayer through a charge transfer mechanism, exhibiting a binding energy of 12.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
December 2024
Department of Environmental Sciences and Technology, Central University of Punjab, Bathinda, 151001, Punjab, India.
In this study, water extract from Indian rosewood tree leaves was used to synthesize copper oxide nanoparticles (CuO NPs), further loaded on graphene oxide sheets to synthesize a novel nanocomposite (CuO@GO@IR). The maximum tetracycline removal was achieved at optimum conditions of pH 3, adsorbent dose 0.03g/50 mL, and 240 min contact time.
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