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> SCIENCEDOMAIN international en-US Chemical Science International Journal 2456-706X 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## 2020-02-13 2020-02-13 1 12 10.9734/CSJI/2020/v29i130152 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## 2020-02-19 2020-02-19 13 20 10.9734/CSJI/2020/v29i130154 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## 2020-02-21 2020-02-21 21 29 10.9734/CSJI/2020/v29i130155 Determination of Compressive Strength and Combustibility Potential of Agricultural Waste Briquette <p>This study evaluates the development of a substitute and alternative solid fuel in the form of briquette from agricultural wastes (rice husk, sawdust and cotton stalk charcoal). Four sets of briquette with different grades were produced using a discontinuous briquette production technology, where a single briquette is produced at a time in a closed mould. Some physical properties such as; Length of briquettes (170 mm), diameter of briquettes (50 mm), mass of briquettes (140-160 g), volume of briquettes (133.5 cm<sup>3</sup>), density of briquettes (1.05-1.20 gm<sup>3</sup>), texture of briquettes (rough), and colour of briquettes (brown, light brown and mud black), were investigated using physical methods of evaluation. The result of the proximate analysis (moisture 10.5-10.8%, ash 30.3-33.8%, volatile matter 20.5-25.9% and fixed carbon contents 45.2-52.6%. The burning potential tests carried out on the formed briquettes compared to that of firewood showed that firewood boils 5 litres of water in 60 minutes, while Rice husk, Sawdust, Cotton stalk charcoal blended with rice husk, and Sawdust briquettes boils the same volume of water in 35, 30, 20 and 25, minutes respectively. Compressive strength of the briquettes was determined as 155.9, 155.9, 158.1 and 158.1 KN/m2 for rice husk, sawdust, cotton stalk charcoal blended with rice husk and sawdust briquettes respectively. Energy dispersed x-ray fluorescence spectrometer (ED-XRF) analyses revealed the existence of minor and major elemental percentage compositions (Cl, Br, P, K, Ca, Ba, Cu, Zn, Fe, Mn and Si, Ti, V, Cr, Ni, Sr, Rb). Liebig’s and Kjeldahl’s methods of laboratory analyses confirmed the presence of organic elements (C, H, O, N and S) that contributes to the heating value, increase in ignitability, smooth combustion. It can, therefore, be concluded that briquettes produced in this research work provide a better alternative to firewood and charcoal energies, they are eco-friendly, having high heat intensity with smooth burning and are easy to handle, store and transport, they are very cheap, affordable to both rural and semi-urban dwellers.&nbsp;&nbsp;</p> B. A. Thliza F. I. Abdulrahman J. C. Akan Z. M. Chellube B. Kime ##submission.copyrightStatement## 2020-02-25 2020-02-25 30 46 10.9734/CSJI/2020/v29i130156