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Research Article
Treatment of Domestic Wastewater by Phytodepuration: The Case of the Bangui University Restaurant in the Central African Republic
Issue:
Volume 13, Issue 3, June 2025
Pages:
46-54
Received:
2 April 2025
Accepted:
16 April 2025
Published:
9 May 2025
Abstract: The aim of this work is to study the effectiveness of reed purification for wastewater treatment using a natural and ecological phytotreatment technique. Among the purification plant species identified, Phragmites australis was chosen for its high purification capacity. After six months of operation, the results show high purification efficiencies for parameters such as TSS, with an abatement rate of 99.16%, 94.01% for COD, 88.90% for BOD5, 99.24% for PO4 3- and 71.20% for SO42-. We also observed values of 85.20% for NO2- and 85.40% for NO3-. With regard to microbiological parameters, we recorded an elimination rate of 80% for total coliforms and 97.75% for fecal streptococci after treatment, demonstrating the effectiveness of reeds in improving water quality. Overall, these results demonstrate the high purification performance of this technique and the powerful cleansing power of reeds.
Abstract: The aim of this work is to study the effectiveness of reed purification for wastewater treatment using a natural and ecological phytotreatment technique. Among the purification plant species identified, Phragmites australis was chosen for its high purification capacity. After six months of operation, the results show high purification efficiencies ...
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Review Article
One Health and Roles of Chemical Sciences
Chidozie Vivian Nwatoka,
Okan Hillary Ehgomare,
Mbah Amaechi,
Chukwu Otuh Chukwu
,
Mary Paymwa Luka-Anzah Kagoro*
Issue:
Volume 13, Issue 3, June 2025
Pages:
55-64
Received:
1 April 2025
Accepted:
15 April 2025
Published:
22 May 2025
Abstract: One Health is a framework that recognises the interconnection between human health, animal health and environmental health. It is a collaborative, multidisciplinary approach that aims to develop strategies to prevent and control diseases, improve health outcomes, and address the global challenges of antimicrobial resistance (AMR), food safety, and environmental degradation. Chemical science plays a crucial role in supporting the One Health framework. Chemical sciences should have a significant role, but its integration has been insufficient. Specifically, the lack of systemic chemical surveillance, the continued use of environmentally persistent compounds, and inadequate chemical risk assessment models present substantial obstacles to achieving One Health objectives. This article examines the central yet underutilised role of chemical sciences in catalysing the One Health paradigm shift. The aim is to demonstrate how chemical sciences can provide molecular-level insights and technologies to predict, prevent, and mitigate health threats at the human-animal-environment interface. From the design of safer pharmaceuticals and veterinary drugs to the monitoring and remediation of environmental contaminants, chemistry is uniquely positioned to contribute transformative tools and knowledge. The integration of chemical sciences into One Health is challenged by a lack of research collaboration, insufficient interdisciplinary training, and regulatory frameworks that account for the ecological impact of chemicals. This review explores the contributions of chemical sciences to the One Health concept and advocates for the detection, analysis, and mitigation of chemical hazards that impact human, animal, and environmental health. This review also addresses possible solutions: (1) the incorporation of One Health principles into chemical science education and training; (2) the development of collaborative research platforms that bridge chemistry with epidemiology, veterinary sciences, and ecology; (3) policy reforms to strengthen regulation of chemical use across sectors; and (4) the advancement of green chemistry and sustainable design principles to minimise environmental and biological impacts at the source. Additionally, innovations in chemical informatics and sensor technologies can enhance real-time surveillance and facilitate data-driven decision-making. Meanwhile, chemical sciences should be repositioned as one of the core pillars of the One Health framework, and the practice should be holistic, sustainable and preventive instead of reactive.
Abstract: One Health is a framework that recognises the interconnection between human health, animal health and environmental health. It is a collaborative, multidisciplinary approach that aims to develop strategies to prevent and control diseases, improve health outcomes, and address the global challenges of antimicrobial resistance (AMR), food safety, and ...
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Research Article
Azo-Imino Tautomerism in Sudan Red 7B/Cyclodextrin Coated ZnO Nanocomposites: Evidence by Spectral and Microscopic Perspectives
Palanichamy Ramasamy,
Narayanasamy Rajendiran*,
Ayyadurai Mani,
Govindaraj Venkatesh,
Albert Antony Muthu Prabhu
Issue:
Volume 13, Issue 3, June 2025
Pages:
65-75
Received:
9 May 2025
Accepted:
23 May 2025
Published:
23 June 2025
DOI:
10.11648/j.sjc.20251303.13
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Abstract: Sudan Red-7B/Cyclodextrin doped ZnO nanocomposites are synthesized and analyzed by various spectral and microscopic methods. The doping effect of SR7B/CD on ZnO nano investigated by UV-visible, fluorescence, FTIR, DTA, XRD, FE-SEM and TEM methods. The effect of different polarities of the solvents, α-cyclodextrin (α-CD) and β-cyclodextrin (β-CD), on MV was studied by various spectral methods. The inclusion behaviour of SR7B on both CDs was determined by PM3 method. The solvent and CD studies show that the azo-imino tautomer is present in the SR7B molecule and that, depending upon the polarity of the solvents, absorbance and emission intensities of the azo-imino tautomer is varied. With increasing CD concentrations, the shorter wavelength emission intensity of the SR7B regularly increased while the longer wavelength emission intensity decreased. The horizontal bond length of SR7B is longer than the CD cavities; hence, this molecule is partially encapsulated in the CD cavity. HOMO-LUMO gap for MV/β-CD inclusion complex was more negative, which supports that this complex is more stable than MV/α-CD inclusion complex. Red or blue shifted absorption and fluorescence maxima were seen in SR7B/CD/ZnO nanocomposites than SR7B/CD inclusion complex. Nanoparticle size was measured by TEM-EDS and X-RD methods. TEM image showed that nanosheets are formed in SR7B/CD/ZnO.
Abstract: Sudan Red-7B/Cyclodextrin doped ZnO nanocomposites are synthesized and analyzed by various spectral and microscopic methods. The doping effect of SR7B/CD on ZnO nano investigated by UV-visible, fluorescence, FTIR, DTA, XRD, FE-SEM and TEM methods. The effect of different polarities of the solvents, α-cyclodextrin (α-CD) and β-cyclodextrin (β-CD), o...
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Research Article
Synthesis, Structural Characterization, and Photochromic Behavior of a New Hybrid Diphosphomolybdate Compound
Issue:
Volume 13, Issue 3, June 2025
Pages:
76-83
Received:
14 May 2025
Accepted:
3 June 2025
Published:
23 June 2025
DOI:
10.11648/j.sjc.20251303.14
Downloads:
Views:
Abstract: The integration of organic species with polyoxometalates leads to the formation of hybrid materials that benefit from the combined functionalities of both components. These organo-inorganic systems are of great interest due to their potential synergistic behavior. Developing straightforward and efficient synthetic approaches to design such materials combining the rigidity of the inorganic backbone and the tunability of organic units remains a key objective in the field of materials chemistry. In this work, we present a simple "one-pot" synthesis route for the compound (C6H20N3)2[P2Mo5O23].1.5H2O. Structural characterization was performed using single-crystal X-ray diffraction alongside infrared and UV-Visible spectroscopy. The compound crystallizes in the monoclinic system, space group P21/c, with the following unit cell parameters: a = 18.9626(2) Å, b = 10.8514(1) Å, c = 16.4933(1) Å, β = 107.37(1)°, and Z = 4. Its structure is based on a diphosphomolybdate anion [P2Mo5O23]6-, neutralized by two organic cations (C6H20N3)3+, and accompanied by 1.5 lattice water molecules. The three-dimensional arrangement is characterized by layered assemblies oriented along the a-axis, stabilized through extensive hydrogen bonding. These layers alternate between polyanionic clusters, organic moieties, and water molecules, forming a robust supramolecular network. Notably, this material displays photochromic behavior, suggesting its potential for applications in responsive optical systems.
Abstract: The integration of organic species with polyoxometalates leads to the formation of hybrid materials that benefit from the combined functionalities of both components. These organo-inorganic systems are of great interest due to their potential synergistic behavior. Developing straightforward and efficient synthetic approaches to design such material...
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