JOURNAL OF ADVANCES IN CHEMISTRY https://rajpub.com/index.php/jac KHALSA PUBLICATIONS en-US JOURNAL OF ADVANCES IN CHEMISTRY 2321-807X <p><a href="http://creativecommons.org/licenses/by/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by/4.0/88x31.png" alt="Creative Commons License" /></a> All articles published in <em>Journal of Advances in Linguistics</em> are licensed under a <a href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.</p> Improving Quality of Water from Murchison Bay using Clay from Chelel, Kapchorwa District, Ugandao https://rajpub.com/index.php/jac/article/view/8537 <p>Pollution resulting from increased human activities is threatening Lake Victoria, its effects are characterized by eutrophication, high turbidity, pH, iron(II) concentration and chemical oxygen demand (COD). In this study we have investigated the effect of Fe-montmorillonite clay from Chelel on turbidity, pH, concentration of iron, total suspended soils, total nutrients and COD of water sampled from Murchison bay watershed of Nakivubo channel south of Kampala. Varying amounts of clay powder was vigorously stirred with water samples for 5 minutes, filtered using Whitman paper at ambient temperatures. The optimum concentration of clay of 0.4gl<sup>-1</sup> was found to produce 73.5<u>+</u> 2% fall in COD indicating elimination of microbes and organic waste. The pH of water became 6.3<u>+</u> 0.2 showing that impurities had been bound to clay. The turbidity of filtrate dropped to 15.7<u>+</u> 0.3NTUshowing that clarity of water was improved by adsorption of suspended solids to clay minerals. The concentration of iron(II) fell from 3.7 <u>+</u> 0.3 to 2.5<u>+</u> 0.2mgl<sup>-1</sup> indicating fairly high extent of heavy metal removal from Murchison bay (MB) waters. The TSS and nutrients in MB water&nbsp;&nbsp; also decreased greatly when clay was stirred with water at ambient temperatures. The available data can be relied on to recommend use of this clay in treatment of waste water and/or sewage from Kampala. Further studies on combined use of clays with alums, zeolites and/or lime need to be carried out.&nbsp;</p> Mukasa-Tebandeke I. Z Karume I Wasajja H. Z Nankinga R Copyright (c) 2020 Mukasa-Tebandeke, I.Z, Karume I, Wasajja H.Z, Nankinga R 2020-01-04 2020-01-04 17 1 29 10.24297/jac.v17i.8537 Characterization of a Ag+-Selective Electrode Based on Naphthalimide Derivative as Ionophore https://rajpub.com/index.php/jac/article/view/8685 <p>A naphthalimide derivative has been explored as neutral ionophore for Ag<sup>+</sup>-selective electrode. Potentiometric response revealed that electrode based on the proposed ionophore with 2-nitrophenyl octyl ether as solvent in a poly (vinyl chloride) membrane matrix shows a measuring range of 1.0×10<sup>-6</sup>-1.0×10<sup>-</sup><sup>2</sup> M with a slope of 50.4±0.3 mV/decade. This electrode has high selectivity to Ag<sup>+</sup> with respect to alkaline, alkaline earth and other heavy metal ions.</p> Zhang Jun Chen Qiwei Zhang Wenting Yu Chunwei Zhang Qinnan Yang Shouhong Yao Bin Xu Xuan Copyright (c) 2020 Zhang Jun, Chen Qiwei, Zhang Wenting, Yu Chunwei, Zhang Qinnan, Yang Shouhong, Yao Bin, Xu Xuan 2020-04-10 2020-04-10 17 30 34 10.24297/jac.v17i.8685 Effect of Temperature Extraction on the Potassium and Calcium Content in the Lemon and Orange Water Peel Extracts https://rajpub.com/index.php/jac/article/view/8714 <p>The aim of this study is to examine the effect of temperature extraction on the potassium (K) and calcium (Ca) contents in orange and lemon peel extracts. The extractions were done at 62 ºC and 92 °C for 15 minutes and atmospheric pressure in distilled water. The fruit peel content in the extraction mixture was 5 % (w/v) in all samples. Calcium (Ca) and potassium (K) concentrations have been determined by flame photometric method. This research has revealed that by increasing the temperature of extraction, in particular, the concentration of Ca and K concentrations increased as applied extraction temperatures increased. The concentration of potassium is higher than the concentration of calcium in orange and lemon extracts, respectively. The concentration of K was 308 mg/l at 62 ºC and 361 mg/l at 92 ºC in lemon extracts, while in orange extracts the concentration of K was 476 mg/l at 62 ºC and 483 mg/l at 92 ºC. The concentration of Ca was 70.8 mg/l at 62 ºC and 71.9 mg/l at 92 ºC in lemon extracts, while in orange extracts the concentration of Ca was 91 mg/l at 62 ºC and 93.6 mg/l at 92 ºC. These results confirm that both citrus could be a very valuable source of potassium and calcium which are needed micronutrients to ensure the water and electrolyte balance and to build and maintain strong bones, proper function of muscles and nerves.</p> Amra Bratovcic Copyright (c) 2020 Amra Bratovcic 2020-04-19 2020-04-19 17 35 43 10.24297/jac.v17i.8714