Abdellatif EL Maghraoui, Abdelaziz Zerouale, Mustapha Ijjaali, Ahmed Harrach
Page Numbers : 138-142
DOI : 10.36348/sijcms.2020.v03i09.002
The aim of this work is to prepare the room-stable calcium ferrate CaFeO4 from Na2FeO4 chemically synthesized from ferric salts, in an alkali hydroxide medium and hypochlorite which is a particularly effective oxidizing agent in the synthesis, respecting the filtration, purification and drying processes required for the synthesis, because each change can lead to decomposition and decrease in purity. The calcium ferrate synthesis process consists in substituting the sodium ions of the VI ferrate obtained by Calcium by mixing them with a solution of calcium nitrate Ca(NO3)2, in order to study and optimize the essential parameters influencing the yield substitution as well as monitoring of its degradation over time, the reaction yield of which is of the order of 98.7% at a temperature of around [0 ° C - 40 ° C] and of pH = 11 for 30 minutes. The phase obtained was characterized by UV spectrophotometer by measuring the optical density at a wavelength of 507 nm and by the volumetric titration method.
Original Research Article
Nov. 5, 2020
Study of Fish Diversity in Various Conditions of Water Level in Batu Bumbun Reservate of Middle Mahakam Regency of Kutai Kartanegara, East Kalimantan, Indonesia
Lariman, Sus Trimurti
Page Numbers : 128-137
DOI : 10.36348/sijcms.2020.v03i09.001
This study aims to determine the diversity of fish at various water levels in Batu Bumbun Reservat, as input material to formulate management activities that must be done to save the reserve. Research was carried out by survey method, in the dry season (April-June) and rainy season (November-December) 2016. Parameters measured, water quality (DO, pH, temperature, TSS, TDS, alkalinity and brightness), fish community structure diversity, uniformity, relative abundance, diversity and dominance), water levels, and sedimentation. The fish community data obtained were analyzed by the Shannon-Wiener index. The results showed that: (1) Changes in water level resulted in the Batu Bumbun Reservus ecosystem having experienced severe degradation, characterized by fluctuations in water level during two extreme seasons. When the rainy season occurs extreme floods, while the dry season, there is siltation to dry. (2) Community of fish caught in Batu Bumbun Reservus ecosystem of 29 species, consisting of 23 genus and 16 families. When the rainy season is dominantly caught fish community (white fish), with fish density 7.015.000 head / km2, while the dominant season is dominant caught is a community of swamp (black fish), with density of 2,334,000 fish / km2. Based on the analysis of fish community, the value of diversity index (H ') ranged from 1,188-0,825 means low-moderate species diversity, dominance index (C) around 0.0827-0.2147 means no dominant species and uniformity index (E) , 8295-0.6710 means that in a balanced state, there is no competition. It is concluded that the Batu Bumbun Reservus ecosystem has experienced severe degradation, with indicator of fish community change. It is recommended that the management must be done to save the Batu Bumbun Reservus ecosystem is, Dredging, Weed cleaning, Local Fish Restocking, illegal fishing Prevention, Increase of reservat security facility.
Original Research Article
Oct. 30, 2020
Proximate Composition and Antioxidant Activities of Different Species of Mangnifera indica Seeds Kernel Cultivated in Esan West Local Government Area of Edo State
Odia A, Irabor GE, Nweke CJ
Page Numbers : 120-127
DOI : 10.36348/sijcms.2020.v03i08.002
Antioxidant activities of some species of Mangnifera indica seed kernel (sucking mango, bush mango and opiororo mango) extracts were studied. The antioxidants capacities of the mango seed extracts were compared to some known synthetic antioxidant. Results obtained showed that the three different species of Mangnifera indica seed kernel which have 30.24+0.030%, 21.11+0.010% and 15.14+0.020% for sucking, bush and opiororo mangoes respectively had a lower scavenging capacity compared to the synthetic positive control standard (vitamin C) which recorded 32.57+0.001% in DPPH radical scavenging assay. Mangnifera indica specie B (bush mango) had the highest scavenging capacity (66.76+0.014%) compared to the synthetic positive control BHT (64.40+0.020%) in the reducing power determination assay. Mangnifera indica specie B (bush mango) and specie C (opiororo mango) had higher scavenging capacities of 14.64+0.031% and 14.29+0.019% for hydrogen peroxide scavenging capacity compared to synthetic sodium pyruvate which has 13.01+0.009%. Proximate composition of three varieties of mango seeds was also determined. The percentage moisture, ash crude fat, crude fibre, protein and carbohydrate contents was determined using A.O.A.C. method. Opiororo mango and Sucking mango had similar values for moisture content (8.00%) while Bush mango had comparable value of 8.05%. The ash content ranged between 0.40 - 1.80% and Bush mango had the highest value of 1.80±0.03%. The fat content was observed to be between 14.29±0.05% and 27.14±0.01% with sucking mango having the highest fat content (27.14±0.01%). Bush mango and Opiororo mango had similar values for crude fibre (49.50%) while sucking mango had comparable value of 49.00±0.03%. The crude protein ranged between 9.26 - 14.27%. This study suggests that the seeds may be nutritionally potent with appreciable high levels of nutrients and energy which can be incorporated into feed/food.
Original Research Article
Oct. 29, 2020
Improved Performance in Bitumen Properties through Modification with Sheared Polyethyline Waste
G. Aladekoyi, E. G. Olumayede
Page Numbers : 109-119
DOI : 10.36348/sijcms.2020.v03i08.001
Polymer modification of bitumen to decrease bitumen pavement susceptibility to high and low temperatures, allowing reduction in common failure mechanisms as rutting and cracking has been in existence since decade. The objectives was to study the mechanical and rheological properties of properties of extracted base bitumen from Agbabu and Loda and bitumen–polymer (polyethylene) blend from the two sources and helped to understand possible conversion of the non-degradable waste into useful product. 200grams of sheared waste polyethylene sachet were mixed in ratio 10:90, 20:80, 30:70, 40:60 and 50:50 to extracted bitumen sample from both Agbabu and loda using mechanical mixer Heidolph model RZR 2020. These were heated in a thermosetting oven at 3000C for two hours for good modification. The results obtained indicated that Agbabu bitumen had good yield (79.90±0.01) when compared with Loda (46.50±0.01) after extraction. Other physico-mechanical properties of sheared Polyethylene Modified Bitumen (SPMB) indicated that bitumen base from Agbabu is efficient and economical for road pavement. The results obtained from SPMB from Agbabu and Loda were; Penetration at 250C increased from ratio 10:90 to 40:60 in both samples (47.50±0.20 -57.35 ±0.10) and (46.20±0.20 -52.15 ±0.20) before retreating. Marshall Stability (kg) at 600C also increased with increase in sheared polyethylene modified bitumen from10% to 40% increase in both modifications and diminished in 50% increase. Generally the values obtained for the physico-mechanical properties increased with increase in modifiers from 10% to 40% modification in the two samples, but good performance was noted in Agbabu modification than Loda for sheared polyethylene bitumen. The rheological properties from different proportions of modification at temperature ranges from 450C to 650C indicated that SPMB at 40% modification is encouraged for better performance because these blends will exhibit greater stiffness at higher temperature and high flexibility at low temperatures.
Original Research Article
Sept. 25, 2020
Morphology and Study the Crystal Chemistry of a Novel Ternary Mixed Valence Bi1.52 Co2.52 Zr0.751 N0.641 O8.12 Oxide Orthorhomic Crystal Structure by Ab Initio Method via Powder XRD
Yuv Raj Sahu, Parashuram Mishra
Page Numbers : 99-108
DOI : 10.36348/sijcms.2020.v03i07.002
A novet crystal stucture has been synthesised and solved the scrystal structure by ab intio method via powder XRD and refined by Rietveld methos .The rfined values are Bi1.52 Co2.52 N0.641 O8.12 Zr0.751, Formula weight 673.60, Crystal system orthorhombic, Space group P 2 2 21 (no. 17) Unit cell dimensions, a = 15.5850 Å, b = 15.2053 Å,c = 15.3691 Å,Cell volume 364.209 Å3,Z=4,Density=1.228 g/cm3 GOF=0.012, Rp=0.1221, Rw=0.1443. The metal framework of the compound was solved in this investigation via direct methods from hk0 precession electron diffraction intensities recorded with a Philips EM400 at 100 kV. A subsequent (kinematical) least-squares refinement with electron intensities yielded slightly improved co-ordinates for the 11 heavy atoms in the structure. Chemical analysis of several crystallites by EDX is in agreement with the formula are Bi1.52 Co2.52 N0.641 O8.12 Zr0.751, Moreover, the structure was independently determined by Rietveld refinement from X-ray powder data obtained from a multi-phasic sample. It has been solved using a ab intio techniques based on minimum cation-cations distances and refined with room temperature powder dif fraction data. Least squares refinement of the structure of Bi1.52 Co2.52 N0.641 O8.12 Zr0.751, using 70 integrated intensities containing contributiobs form 103 reflections leads to the refinement values.The morphological study the synthesized oxide by SEM and TEM.
Original Research Article
Sept. 15, 2020
Study of Antioxidant and Anticorrosion Activity of Some Microwave Synthesized Thiourea Derivative Ligands and Complexes
Ali M Hassan, Zaghloul I Elbialy, Khalid M Wahdan
Page Numbers : 83-98
DOI : 10.36348/sijcms.2020.v03i07.001
The great need to the antioxidants in our life and the increased demand of thiourea derivatives which exhibit great biological activity as anti-inflammatory, antimicrobial, antitumor, and also act as antioxidants and anticorrosive agents leads us to synthesize: N-(2-chlorophenyl)-N’- benzoyl thiourea (CBT) and N-(4-chloro phenyl)-N’- benzoyl thiourea (PCBT) by reflux method and then their metal complexes of CoII, NiII, CuII and ZnII were synthesized by microwave (green chemistry) in hope to get better activities. The structure of ligands and their complexes have been characterized by using elemental analysis, mass Spectroscopy, FT-IR, UV-Vis., 1HNMR and 13CNMR. In this study the synthesized compounds were evaluated for their in vitro DPPH radical scavenging activity. They exerted varying degree of scavenging activity toward DPPH radical with IC50 values between 84 and 250 µg/mL which is considered good and acceptable activity when compared with the activity of standard Ascorbic acid which give IC50 = 14.4 µg/mL. Also the anticorrosion activity of the two synthesized ligands (CBT) and (PCBT) was evaluated on carbon steel coupons by using weight loss method.
Original Research Article
Aug. 19, 2020
Study on Adsorption Properties of Modified MWNTs to Pb2+ in Water
In order to remove the residual harmful lead ion(Pb2+) in water, modified multi-walled carbon nanotubes (O-MWNTs), as a adsorbent, was used to enrich and remove Pb2+ in water samples. O-MWNTs was obtained by mixed acid oxidation. It was analyzed and confirmed that O-MWNTs had been obtained successfully by FITR and TEM. The adsorption property of O-MWNTs to Pb2+ in water was investigated. The adsorption efficiency of adsorbent dosage, adsorption time, adsorption pH and adsorption temperature was investigated, and conclusions are as follows: when pH is 5, the temperature is 20℃, adsorption time is 40 min, and adsorbent dosage is 40 mg/L, the adsorption efficiency was the highest. Adsorption rate of can reach 81.7% under optimal conditions.
