Chemical Science International Journal <p style="text-align: justify;"><strong>Chemical Science International Journal&nbsp;(ISSN:&nbsp;2456-706X)&nbsp;</strong>aims to publish&nbsp;high quality papers (<a href="/index.php/CSIJ/general-guideline-for-authors">Click here for Types of paper</a>)&nbsp;in all aspects of chemical science. The journal also encourages the submission of useful reports of negative results. This is a quality controlled,&nbsp;OPEN&nbsp;peer reviewed, open access INTERNATIONAL journal.</p> en-US (Chemical Science International Journal) (Chemical Science International Journal) Thu, 13 Feb 2020 08:51:07 +0000 OJS 60 Sythesis of Nano Zerovalent Iron Supported Sawdust (NZVI/SD) and Its Application for Removal of Arsenic (III) from Aqueous Solution <p>Sawdust supported nano-zerovalent (NZVI/SD) iron was synthesized by treating sawdust with ferrous sulphate followed by reduction with NaBH<sub>4</sub>. The NZVI/SD was characterized by SEM, XRD, FTIR and Chemical method. Adsorption of As (III) by NZVI/SD was investigated and the maximum uptake of As (III) was found at pH value of 7.74 and equilibrium time of 3 hrs. The adsorption isotherm modelling revealed that the equilibrium adsorption data were better fitted with the Langmuir isotherm model compared with the Freundlich Isotherm model. This study revealed that the maximum As (III) ions adsorption capacity was found to be 12.66 mg/g for using NZVI/SD adsorbent. However, the kinetics data were tested by pseudo-first-order and pseudo-second-order kinetic models; and it was observed that the adsorption data could be well fitted with pseudo-second-order kinetics for As (III) adsorption onto NZVI/SD depending on both adsorbate concentration and adsorption sites. The result of this study suggested that NZVI/SD could be developed as a prominent environment-friendly adsorbent for the removal of As (III) ions from aqueous systems.</p> Tasrina R. Choudhury, Snahasish Bhowmik, M. S. Rahman, Mithun R. Nath, F. N. Jahan, B. A. Begum, Mohammad Nurnabi ##submission.copyrightStatement## Thu, 13 Feb 2020 00:00:00 +0000 Emulsion Liquid Membrane Extraction of Bisphenol A with Three-dimensional Spiral Plate-type Microchannel <p>The extraction of BPA (Bisphenol A) from aqueous solutions was performed using A set of three-dimensional spiral plate-type microchannel (3D-SPM) by emulsion liquid membrane (ELM). In the continuous extraction experiments, the effect of the flow rate ratio of emulsion to external aqueous phase ratios, <em>Q</em>e/<em>Q</em>a and height of microchannel, H and plate numbers, P, on the BPA extraction was studied. It was found that the less the height of microchannel is, the more extraction efficient it is. By increasing the plate number, the extraction efficiency and the distribution coefficient increase. The optimum performance was investigated by changing the flow rates of <em>Q</em>a and <em>Q</em>e. When using the flow rate ratio <em>Q</em>e/<em>Q</em>a of 7:1 in a 3D-SPM with a plate number of 9 and a height of 100 µm, 97% maximum depletion of BPA was obtained in 7.9 Seconds. These results show that 3D-SPM can intensify the ELM extraction process of BPA, which provides an optional technology for the disposal of BPA.</p> Diliyaer Hamiti, Zhengdong Ma, Meixiu Wei, Yadong Pu, Xiao Chen ##submission.copyrightStatement## Wed, 19 Feb 2020 00:00:00 +0000 Sorption of Pb2+, Cu2+ and Zn2+ from Aqueous Solution Using a Blended Membrane of Immobilized Karkashi (Sesame Leaves) and Sodium Alginate <p>Sorption techniques are widely used to remove heavy metal ions from large volume of aqueous solutions, this plays a vital role in controlling environmental pollution. Herein, the sorption of Pb<sup>2+</sup>, Cu<sup>2+</sup> and Zn<sup>2+</sup> with blended membrane of sodium alginate (Na-Alg) and immobilized <em>karkashi</em> leaves (IKAL) from aqueous solution was investigated at optimum conditions for effectiveness. Sorption capacities of the membrane for Pb<sup>2+</sup>, Cu<sup>2+</sup> and Zn<sup>2+</sup> were found to be 86.80, 40.60 and 39.55% respectively. The sorption behavior with respect to initial pH, ionic strength, temperature, contact time and initial metal ion concentration was investigated for optimum sorption conditions. Maximum sorption was found to occur at pH 3.0 for all the metal ions studied. Results showed that metallic ion uptake by the blended membrane declined with increase in ionic strength. This trend was also observed at an increased temperature of 50ºC for Pb<sup>2+</sup>, Cu<sup>2+</sup> and 40ºC for Zn<sup>2+</sup>. Increase in initial metal ion concentration led to increase in metal ion uptake.</p> <p>At the end of the chemical remediation, the blended membrane was found to be effective to some extent, with the reaction being exothermic.</p> Ibrahim Maradona, J. H. Kanus, M. Suleman Stephen ##submission.copyrightStatement## Fri, 21 Feb 2020 00:00:00 +0000