https://ojs.as-pub.com/index.php/ERSR/issue/feed 2025-09-09T09:32:15+08:00 Managing Editor editorial_office@as-pub.com Open Journal Systems <p><strong>ISSN:&nbsp;3029-150X(Online)</strong></p> <p>Ecological Risk and Security Research (ERSR) is an international open-access academic journal dedicated to publishing high-quality research across all fields related to ecology. As a peer-reviewed journal, ERSR aims to address pressing ecological issues by offering a platform for advanced communication. The journal focuses on ecological risks and preventive countermeasures to promote sustainable practices and solutions.</p> <p>Submissions can include original research articles, review articles, commentaries, letters, and more. The research topics of ERSR include but are not limited to:</p> <ol> <li class="show">Environmental Risk Assessment</li> <li class="show">Biodiversity Conservation</li> <li class="show">Climate Change Impact</li> <li class="show">Pollution Management</li> <li class="show">Ecological Security Strategies</li> <li class="show">Sustainable Resource Management</li> <li class="show">Ecosystem Services</li> <li class="show">Human-Ecological Interactions</li> <li class="show">Policy and Governance in Ecology</li> <li class="show">Ecological impacts of water, soil, and air pollution</li> </ol> <p>&nbsp;<strong>The article processing charges is $800 per article.</strong></p> https://ojs.as-pub.com/index.php/ERSR/article/view/10985 2025-09-09T09:32:15+08:00 Akanbi Magdalene Nkeiru magakanbi2009@gmail.com Ejidike Lynda Chinyere magakanbi2009@gmail.com Eze Patricia Nnebuogo magakanbi2009@gmail.com Okore Glory Jerry magakanbi2009@gmail.com Aharanwa Bibiana Chimezie magakanbi2009@gmail.com Oze Nwanneamaka Rita magakanbi2009@gmail.com

<p>The increasing contamination of water bodies by heavy metals, particularly cadmium (Cd²⁺), poses a significant threat to environmental and public health due to its toxicity, persistence, and bioaccumulate nature. This study investigates the potential of citric acid-modified chitosan, derived from oyster shells, as an eco-friendly and cost-effective adsorbent for the removal of cadmium ions from aqueous solutions. Chitosan was extracted through deproteination, demineralization, and deacetylation processes, followed by chemical modification using citric acid to enhance its adsorption properties. Characterization of the modified chitosan was conducted using Fourier Transform Infrared Spectroscopy (FTIR), UV–Visible Spectroscopy (UV–Vis), and Atomic Absorption Spectrophotometry (AAS). FTIR analysis confirmed the successful transformation of oyster shell into chitosan, with the emergence of functional groups such as hydroxyl, carbonyl, and amine groups critical for metal ion binding. UV–Vis. spectroscopy revealed strong absorbance in the UV region and optical transparency in the visible range, indicating high purity and suitability for biomedical and environmental applications. Batch adsorption experiments were performed to evaluate the effects of initial cadmium concentration, contact time, and temperature. The results showed that maximum adsorption occurred at low concentrations, with equilibrium reached at 60 minutes and optimal performance at 40°C. Isotherm modeling revealed that the Freundlich model (R² = 0.8389) better described the adsorption behavior than the Langmuir model (R² = 0.0245), suggesting multilayer adsorption on a heterogeneous surface. Kinetic studies indicated that the pseudo-second-order model (R² = 0.9738) best fit the data, implying chemisorption as the dominant mechanism. Overall, the study demonstrates that citric acid-modified chitosan is a promising biosorbent for cadmium removal, offering a sustainable solution for wastewater treatment. Further optimization and real-world application studies are recommended to enhance its practical viability.</p>

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