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) Fri, 30 Aug 2019 11:41:43 +0000 OJS 60 Thermodinamical Analyse the Formation of Phosphates Copper, Zinc and Cobalt on the Base Double Superphosphate and Sulphates of Copper, Zinc and Cobalt <p><em></em>In this article the relationship between the entropies of crystalline calcium compounds and copper, zinc and cobalt compounds were analyzed. Thermal capacity&nbsp; dependence of temperature for acidic&nbsp; phosphates of copper, zinc and cobalt, determining value of enthalpy and entropy of copper, zinc and cobalt phosphates have been determined and&nbsp; the possibility to conduct thermodynamic analysis of reactions for their formation were established. Accordingly the data of thermodynamic analysis of temperature conditions for obtaining double superphosphate, the most formation of monosubstituted phosphates of copper, zinc and cobalt, and possibility of formation disubstituted of copper phosphates.</p> Z. Turaev, I. T. Shamshidinov, I. I. Usmanov, O. M. Isakova, B. E. Sultonov ##submission.copyrightStatement## Wed, 11 Sep 2019 00:00:00 +0000 Physico-chemical Characterization of Wastewaters Discharged into Songolo River at Pointe-Noire, Republic of Congo <p>Songolo River receives daily domestic and industrial wastewaters from households, laboratories, small and medium size industries (SMEs) and the Loandjili hospital, which are discharged directly into it without prior treatment. The objective of this study is to evaluate the physico- chemical quality of wastewaters discharged into the Songolo River at Pointe-Noire in Republic of Congo. To do this, 56 wastewater samples were taken. Physicochemical analyzes as temperature, pH, electronical conductivity, total dissolved solids, chloride ions, nitrate ions and total hydrocarbons, were &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;carried out on wastewaters. These analyzes showed that in terms of time, during wet periods (April to June), the values of the physico-chemical parameters (conductivity, total dissolved solids, chlorides ions, nitrates ions and total hydrocarbons) are the lowest due to the dilution phenomenon brought by the rains. On the other hand, the beginning of the dry season (July) is marked by much higher levels. The results of physico-chemical analyzes of these effluents also revealed that conductivity, total dissolved solids and total hydrocarbons often have values higher than those recommended by the WHO standard for wastewaters intended for release into the natural environment.</p> K. M. Mbemba, B. D. Koutouma, J. M. Ouamba ##submission.copyrightStatement## Fri, 30 Aug 2019 00:00:00 +0000 Remediation of Surface Water Contaminated with Domestic Purpose Kerosene Using Fenton’s Oxidation <p>The remediation of surface water contaminated with domestic purpose kerosene (DPK) using Fenton’s oxidation was investigated at ambient temperature for effectiveness at optimum conditions established. Results obtained from optimization studies for the Fenton’s oxidation employed for the study were 250000 mg/L H<sub>2</sub>O<sub>2</sub> and 300 mg/L FeSO<sub>4</sub> at ambient temperature with pH of samples adjusted to 3.0. At the end of the chemical remediation, the Fenton’s oxidation was found to be rapid with the reaction being exothermic and followed second order kinetics. About 44.4% of the total petroleum hydrocarbon (TPH) as kerosene removal efficiency was achieved after 90 minutes. The reaction also followed a pseudo-first order kinetics with the rate constant of 3x10<sup>2</sup> mol<sup>-1</sup>cm<sup>3</sup>min<sup>-1</sup>.</p> D. Y. Shinggu, J. H. Kanus, W. O. Medjor ##submission.copyrightStatement## Mon, 02 Sep 2019 00:00:00 +0000