International Research Journal of Pure and Applied Chemistry http://journalirjpac.com/index.php/IRJPAC <p style="text-align: justify;"><strong>International Research Journal of Pure and Applied Chemistry (ISSN: 2231-3443)</strong> aims to publish original research articles, review articles and short communications in all aspects&nbsp; of pure and applied chemistry including analytical chemistry, biochemistry, medicinal chemistry, molecular biology and genetics, inorganic chemistry, organometallic chemistry, materials chemistry, chemistry of solids, liquids, polymers and interfaces between different phases, neurochemistry, nuclear chemistry, modern transmutation, organic chemistry, physical chemistry, phytochemistry, polymer chemistry, supramolecular and macromolecular chemistry, chemical thermodynamics, chemical kinetics, electrochemistry, statistical mechanics, spectroscopy, astrochemistry and cosmochemistry, quantum chemistry and theoretical chemistry, sonochemistry, agrochemistry, atmospheric chemistry, chemical engineering, chemical biology, chemo-informatics, electrochemistry, femtochemistry, geochemistry, green chemistry, histochemistry, immunochemistry, marine chemistry,&nbsp; mechanochemistry, nanotechnology, natural product chemistry, oenology, petrochemistry, pharmacology, photochemistry, radiochemistry, synthetic chemistry, kinetics and mechanisms of chemical reactions, thermochemistry, chemistry in industry and interactions between chemistry and environment.&nbsp;This is a quality controlled, peer-reviewed, open access INTERNATIONAL journal.</p> en-US contact@journalirjpac.com (International Research Journal of Pure and Applied Chemistry) contact@journalirjpac.com (International Research Journal of Pure and Applied Chemistry) Wed, 26 Feb 2020 09:28:31 +0000 OJS 3.1.1.4 http://blogs.law.harvard.edu/tech/rss 60 Removal of Cadmium (II) Ions from Synthetic Wastewaters by Alginate – Immobilized Penicillium sp Biomass http://journalirjpac.com/index.php/IRJPAC/article/view/30150 <p>The objective of this investigation was to study the biosorption of Cd (II) from aqueous solution onto <em>Penicillium</em> sp immobilized in calcium alginate and to determine the isotherms and kinetics of the adsorption process. The capacity for Cd (II) biosorption was investigated as a function of pH, adsorbent dose, contact time and initial metal ion concentration. The results showed that the removal efficiency increased with increase in adsorbent dosage and solution pH. For adsorbent dosage, the highest removal efficiency was 93.45% (adsorbent dosage of 200 mg). In terms of pH, the highest removal percentage was 89.75% at pH of 9.0 and Cd (II) ion concentration of 2 mg/L. The experimental data fitted the Freundlich isotherm better than the Langmuir isotherm. Their R<sup>2</sup> values were 0.9852 and 0.8053 respectively. The calculated maximum biosorption capacity Q<sup>o</sup> was 7.12 mg g<sup>-1</sup>. The values of R<sup>2</sup> for the pseudo – first and pseudo – second order kinetics are 0.9007 and 0.9960 respectively. The experimental value of qe, the biosorption capacity at equilibrium, for the pseudo second order model was closer to the theoretical value than that of the pseudo – first order indicating that chemisorption is the probable mechanism of the process.&nbsp; These results show that the investigated biosorbent is a good low cost adsorbent for the removal of Cd (II) from wastewaters.</p> Daniel O. Jalija, Adamu Uzairu ##submission.copyrightStatement## http://journalirjpac.com/index.php/IRJPAC/article/view/30150 Wed, 26 Feb 2020 00:00:00 +0000