International Journal of Science and Engineering Invention http://ijsei.in/index.php/ijsei <p>The International Journal of Science and Engineering Invention (IJSEI) is an international open access multidisciplinary peer-reviewed journal and this leading international journal publishes scholarly papers and review articles on all aspects of the science, engineering, information technology, medical sciences and social studies of science.&nbsp;The principal mission of the journal is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. 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To verify the originality of content submitted to our journals, we use iThenticate to check submissions against previous publications.</p> <p><strong style="font-family: Arial; font-size: 18px; font-weight: 400; color: #333333;">Copyright / Open Access</strong></p> <p><strong>Open Access</strong> - free for readers, with article processing charges (APC) paid by authors or their institutions.</p> <p><strong>Rapid publication:</strong> manuscripts are peer-reviewed and a first decision provided to authors approximately 20 days after submission; acceptance to publication is undertaken in 10 days.</p> <p><strong>Recognition of Reviewers: </strong>reviewers who provide timely, thorough peer-review reports receive vouchers entitling them to a discount on the APC of their next publication in any IJSEI journal, in appreciation of the work done.</p> <p>Articles published in <em>IJSEI</em> will be Open-Access articles distributed under the terms and conditions of the Creative Commons Attribution License (CC BY). The copyright is retained by the author(s). IJSEI will insert the following note at the end of the published text:</p> <p>© 2018 by the authors; licensee IJSEI. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).</p> International Scientific Invention Journals en-US International Journal of Science and Engineering Invention 2455-4286 Parameters Affecting Dye Adsorption - Using Graphene Coated Sand (GSC) http://ijsei.in/index.php/ijsei/article/view/68 <p>Adsorption is most commonly applied process for the removal of pollutants such as dyes and heavy metals ions from wastewater. The present work talks about preparing graphenic material attached sand grains called graphene sand composite (GSC) by using ordinary sugar as a carbon source. Physical morphology and chemical composition of GSC was examined by using (FTIR, SEM, EDAX and XRD). Efficiency of GSC in the adsorption of organic dyes from water was investigated using reactive green dye with different parameters such as (ph, temperature, contact time and dose). Adsorption isotherm was also studied and the results showed that the maximum adsorption capacity of dye is 28.98 mg/g. This fast, low-cost process can be used to manufacture commercial filters to treat contaminated water using appropriate engineering designs.</p> Seroor Atalah Khaleefa Alia Dr. Mohammed Ibrahimb Hussein Ali Hussein ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 2018-03-25 2018-03-25 4 02 435 to 440 435 to 440 10.23958/ijsei/vol04-i02/01 Solar photocatalysis mediated by ZnO for the removal of last traces of Indigo carmine dye pollutant from water http://ijsei.in/index.php/ijsei/article/view/69 <p>Solar photocatalysis as a potential green technology for the removal of traces of the dye pollutant Indigo carmine (IC) from water is investigated using ZnO as the catalyst. Degradation/decolorization alone does not result in complete decontamination as seen from the significant Chemical Oxygen Demand (COD) of water even after the parent compound has disappeared completely. The degradation proceeds through many intermediates which also get mineralized eventually but slowly. Oxalic acid is identified as a stable slow mineralizing degradation product which itself is formed from other transient intermediates. Effect of various parameters such as catalyst dosage, concentration of the dye, pH, temperature, presence of contaminant salts etc. on the degradation is investigated and quantified. Oxidants such as S<sub>2</sub>O<sub>8</sub><sup>2-</sup> and H<sub>2</sub>O<sub>2</sub> have only moderate influence on the degradation. The degradation follows variable kinetics depending on the concentration of the substrate. The reaction proceeds very slowly in the absence of O<sub>2</sub> indicating the importance of reactive oxygen species and hydroxyl free radicals in photocatalysis. H<sub>2</sub>O<sub>2</sub> formed insitu in the system undergoes concurrent decomposition resulting in stabilization in its concentration. The study demonstrates that solar photocatalysis can be used as a viable tool for the purification of water contaminated with traces of IC.</p> Veena Vijayan Suguna Yesodharan E. P. Yesodharan ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 2018-03-25 2018-03-25 4 02 441 to 463 441 to 463 10.23958/ijsei/vol04-i02/02