Asian Journal of Applied Chemistry Research <p style="text-align: justify;"><strong>Asian Journal of Applied Chemistry Research (ISSN: 2582-0273)</strong>&nbsp;aims to publish high-quality papers (<a href="/index.php/AJACR/general-guideline-for-authors">Click here for Types of paper</a>) in all areas of 'chemistry and its application'. 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 (Asian Journal of Applied Chemistry Research) (Asian Journal of Applied Chemistry Research) Fri, 05 Nov 2021 09:48:27 +0000 OJS 60 Comparative Assessment of the Bioremediation Potential of Polychaetes (Lug worm-Arenicola marina sp and Syllidae Worm-Syllis prolifera sp) in Aquaculture Pond Sediment <p>Polychaetes play an important role in nutrient cycling and remediation of coastal ecosystems. Large quantities of organic matter that could lead to pollution of pond and coastal waters are generated by aquaculture waste. To assess the remediation prospects of <em>Arenicola marina</em> and <em>Syllis prolifera</em> species, laboratory sediment microcosm experiments were conducted where large size <em>Arenicola marina</em> and <em>Syllis prolifera</em> were introduced to sediment in microcosm A, large size <em>Arenicola marina</em> to sediment in microcosm B, large sized <em>Syllis prolifera</em> to sediment in microcosm C and no polychaetes to sediment in microcosm D. Microcosm A′, B′ and C′ as replicates for small size polychaetes were also set up, respectively. After 30 days, microcosm A, B and C had significant decrease in organic carbon levels with microcosm B being the highest (Total organic carbon (TOC); 27.87%; p&lt; 0.05). Both large and small polychaetes promoted significant decrease in sulphur (S) content (mean=62.76±0.21; 62.81±0.21%) and iron(Fe) (mean=49.43±1.47; 36.28±5.90%) respectively. Increase in pH by 31.15±0.13% was found in the presence of large size polychaetes, most likely associated with the burrowing process involving oxidation of Fe to Fe<sub>2</sub>O<sub>3</sub>. Large size polychaetes had better survival (mean=92±0.82%) than their small size counterpart (mean=55±4.08%). The extent of biodegradation B&gt;A&gt;C&gt;D observed revealed that large size <em>Arenicola marina</em> was a better bioremediator of organic matter (OM), Fe and S enriched aquaculture pond sediment, probably due to its biological characteristics, well suited for the aquaculture than other species of sea worms that produce free swimming larvae. Therefore, large size <em>Arenicola marina</em> significantly improved sediment quality as well as increased its pH without compromising their survival. As the search for a better bioremediator of organically enriched sediment continues, our result revealed large size <em>Arenicola marina </em>as a more promising candidate compared to other species documented elsewhere in the world. Hence, rearing of large size <em>Arenicola marina sp</em> is recommended as their feeding habits are well suited for aquaculture.</p> I. O. Oyo-Ita, U. A. Ugbaja, E. E. Oyo-Ita, C. Oge, B. B. Asuquo, O. E. Oyo-Ita ##submission.copyrightStatement## Fri, 05 Nov 2021 00:00:00 +0000 Quartz Reinforced Unsaturated Polyester Resin Composites: Preparation and Characterization <p>Compression molding has produced quartz-reinforced polyester composites (QPCs) weighing 10 to 40 per cent quartz relative to the weight of unsaturated polyester resin. Synergistic changes were made in the composite properties and were superior to those of the individual components. The composite's physical and&nbsp; mechanical properties such as bulk density, water absorption , tensile strength, flexural strength, hardness have illustrated the competency of the composite being developed. It was found that for the resultant composite examined, the percentage of water absorption is very small. However, when quartz content were increased, water absorption grew very slowly. Enhancement of mechanical properties strongly corresponds to strong adhesion force of quartz with the matrix and it influenced by well-disperse quartz particles on the whole surface of composite. This paper also performed thermal characterization of the composites. Because of these remarkable properties, as prepared composite can find applications in packaging, fuel cell, solar cell, structural materials and households purposes.</p> Sujan Kanti Das, Mithun Rani Nath, Rajib Chandra Das, Manas Mondal, Snahasis Bhowmik ##submission.copyrightStatement## Thu, 11 Nov 2021 00:00:00 +0000 Pollution Status and Health Risk Assessment of Polycyclic Aromatic Hydrocarbons in Surface Water, Sediment and Fish from Ezu-River, Anaku, Anambra State, Nigeria <p>The distribution of the sixteen polycyclic aromatic hydrocarbons (PAHs) was studied in surface water, sediment and three fish species (African catfish (<em>Clarias gariepinus</em>), Trout fish (<em>Mormyrus rume</em>) and <em>Hetrobranchus longefilis)</em> from Ezu-river, Anaku, Anambra State, Nigeria. The samples were analysed for PAHs by means of Gas chromatography-mass spectrometry. The results of PAHs showed that, in surface water, the highest concentration was related to benzo(a)pyrene whereas benzo(k)fluoranthene was the most important pollutant in sediment. For the fish samples, <em>Hetrobranchus longefilis </em>recorded the highest concentration in Naphthalene while Anthracene was the most dominant pollutants in <em>Mormyrus rume</em> and in <em>Clarias gariepinus</em> benz(b) fluoranthene was the highest pollutants. The Health and exposure risk assessment was conducted for carcinogenic and non-carcinogenic exposure in adults and children which shows that the cumulative cancer risk and hazard index were within USEPA regulatory standard. Calculated Hazard Index for fish and water samples were less than one and thus be recommended for consumption.</p> J. O. Ogbuagu, E. N. Obi, A. P. Okeke, U. E. Ukpai ##submission.copyrightStatement## Sat, 20 Nov 2021 00:00:00 +0000