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Synthesis of spinel ferrite and its role in the removal of free fatty acids from deteriorated vegetable oil

Chinese Journal of Chemical Engineering 2021年第12期34卷 78-87页

作者： adewale adewuyi Adole I.Ogagbolo Woei Jye Lau Rotimi A.Oderinde Department of Chemical Sciences Faculty of Natural SciencesRedeemer’s UniversityEdeOsun StateNigeria Department of Chemistry Faculty of Natural ScienceUniversity of IbadanIbadanOyo StateNigeria School of Chemical and Energy Engineering Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia

Deterioration and loss of quality of vegetable oil is a big challenge in the food *** study investigated the synthesis of nickel ferrite(Ni Fe_(2)_(O4))via co-precipitation method and its use for the removal of free fatty acids(FFAs)in deteriorated vegetable *** Fe2 O4 was characterized using Fourier transformed infrared spectroscopy(FTIR),X-ray diffraction(XRD),thermogravimetric(TG)analysis,Brunauer–Emm ett–Teller(BET)surface area,transmission electron microscopy(TEM),scanning electron microscopy(SEM)and energy-dispersive X-ray spectroscopy(EDX).Synthesis of Ni Fe_(2)_(O4)was confirmed by characterization,which revealed a BET surface area of 16.30 m^(2)·g^(-1)and crystallite size of 29 *** Fe_(2)_(O4)exhibited an adsorption capacity of 145.20 L·kg^(-1)towards FFAs with an 80.69%removal in a process,which obeys Langmuir isotherm and can be described by the pseudo-second-order kinetic *** process has enthalpy(DH)of 11.251 k Jámolà1 and entropy(DS)of 0.038 k J·mol^(-1)K^(-1)with negative free energy change(DG),which suggests the process to be spontaneous and *** quantum chemical computation analysis via density functional theory further revealed the sorption mechanism of FFAs by Ni Fe_(2)_(O4)occurred via donor–acceptor interaction,which may be described by the lowest unoccupied molecular orbital(LUMO)and the highest occupied molecular orbital(HOMO).The study showed Ni Fe_(2)_(O4)to be a potential means that can remove FFAs from deteriorated vegetable oil.

关键词： Adsorption Co-precipitation Deteriorated vegetable oil Free fatty acid(FFA) Langmuir

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Emergency of per-and polyfluoroalkyl substances in drinking water:Status,regulation,and mitigation strategies in developing countries

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Eco-Environment & Health 2024年第3期3卷 355-368页

作者： adewale adewuyi Qilin Li Department of Chemical Sciences Faculty of Natural SciencesRedeemer's UniversityEdeOsun StateNigeria Department of Civil and Environmental Engineering Rice UniversityHoustonTX 77005USA NSF Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment Rice UniversityHoustonTX 77005USA Department of Materials Science and Nano Engineering Rice UniversityHoustonTX 77005USA Department of Chemical and Biomolecular Engineering Rice UniversityHoustonTX 77005USA

The detection of per-and polyfluoroalkyl substances(PFAS)in water presents a significant challenge for developing countries,requiring urgent *** review focuses on understanding the emergence of PFAS in drinking water,health concerns,and removal strategies for PFAS in water systems in developing *** review indicates the need for more studies to be conducted in many developing nations due to limited information on the environmental status and fate of *** health consequences of PFAS in water are enormous and cannot be *** are ongoing to legislate a national standard for PFAS in drinking ***,there are few known mitigation efforts from African countries,in contrast to several developing nations in ***,there is an urgent need to develop economically viable techniques that could be integrated into largescale operations to remove PFAS from water systems in the ***,despite the success achieved with removing long-chain PFAS from water,more studies are required on strategies for eliminating short-chain moieties in water.

关键词： Emerging water contaminant Per-and polyfluoroalkyl substances Perfluoroalkyl acids Photocatalysis Water pollution

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Physicochemical Properties of the Seed Oil of Khaya senegalensis

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Food and Nutrition Sciences 2024年第3期15卷 171-178页

作者： Abimbola O. Oginni adewale adewuyi Rotimi A. Oderinde Industrial Unit Chemistry Department University of Ibadan Ibadan Nigeria Department of Chemical Sciences College of Natural Sciences Redeemer’s University Ede Nigeria

The physicochemical characteristics of Khaya senegalensis seed oil were investigated. Iodine value, saponification value, percentage free fatty acid (FFA), acid value, and peroxide value were the chemical parameters examined in the oil analysis, while specific gravity and refractive index were examined as physical parameters. The results showed that the acid value was 1.18 ± 0.01, the saponification value was 191.76 ± 0.01 mgKOH/gm, and the iodine value was 102.79 ± 0.01. It contained 0.59 ± 0.01 percent free fatty acid. The value of peroxide was 6.83 ± 0.01 meq/kg. The results showed that the refractive index was 1.462 ± 0.02 and the specific gravity was 0.9194 ± 0.04. The established parameters fell within the worldwide and Nigerian vegetable oil industry standards.

关键词： Khaya senegalensis Physicochemical Parameters Vegetable Oil

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Evaluation of Fresh and Hardened Properties of Self-Compacting Concrete

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Open Journal of Civil Engineering 2015年第1期5卷 1-7页

作者： Oladipupo S. Olafusi Adekunle P. adewuyi Abiodun I. Otunla adewale O. Babalola Department of Civil Engineering College of Engineering Federal University of Agriculture Abeokuta Nigeria

This paper compared the rheological properties and compressive strengths of self-compacting concrete (SCC) and conventional cement concrete. The flowability and segregation resistance of freshly mixed concrete specimens were examined by the V-funnel apparatus, while the characteristics of passing ability were investigated with the L-box apparatus. Cylindrical concrete specimens of 100 mm diameter × 200 mm length were investigated for compressive strength. The rheological properties of SCC are incomparable with those of the conventional concrete due to their diverse testing methods and characteristics of individual flow. The compressive strength results of hardened concrete showed that SCC gained strength slowly compared to the conventional cement concrete due to the presence of admixtures and its 28 days strength was lower than conventional cement concrete, but SCC eventually had potentials of higher strength beyond 90 days. Finally, the effect of water-cement ratio on the plastic properties of self-compacting concrete was quite negligible compared to conventional concrete.

关键词： Concrete Self-Compacting Concrete V-Funnel L-Box Density Compressive Strength

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Pregnancy Rate of Bunaji Cows in a Fixed Time AI Synchronization Protocol Using Ovatide

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Journal of Agricultural Science and Technology(A) 2019年第1期9卷 46-55页

作者： Ubah Simon Azubuike Rekwot Peter Ibrahim adewuyi Abdulmujeeb Bode Omontese Bobwealth Oakina Adeyeye adewale Ayodeji Columbus Philemon Kwinjoh Abah Owoicho Kenneth Agbonu Oluwa Adikpe Ejiofor Charles Ejike Department of Theriogenology University of AbujaNigeria Artificial Insemination Unit National Animal Production Research InstituteShikaZariaKaduna StateNigeria Department of Theriogenology and Animal Production Usmanu Danfodiyo UniversitySokotoNigeria Department of Veterinary Physiology and Biochemistry University of AbujaNigeria Department of Veterinary Parasitology University of AbujaNigeria

This study accessed the reproductive performance of Bunaji cows in an Ovsynch protocol involving *** cows(n=16)aged 4-6 years and weighing between 250-350 kg with body condition scores(BCS)of 2.5-3.5 were *** were two treatment groups for synchronization of *** group 1 comprising Bunaji(n=8)received 50μg of gonadotropin releasing hormone(GnRH)(Cystorelin)and 25 mg of PGF2α.While,treatment group 2 comprising Bunaji(n=8)received 50μg of ovatide and 25 mg of PGF2α.All cows from both treatment groups were inseminated at 16 h after each second GnRH or ovatide *** that showed mucus discharge from the vagina on the day of artificial insemination(AI)were recorded as well as those that had patent *** dilation was measured by taking note of the cows that had mid cervix insemination due to non-passage of the AI gun through the *** palpation was conducted twice at a month interval to select cycling cows within 5-12 d of the estrous cycle before initiating Ovsynch *** was repeated on day 45 post AI to confirm pregnancies in *** showed that the rate of mucus discharge from the vagina was 37.5%and 87.5%for ovatide and Cystorelin,respectively;while the rate of cervical dilation were 75%and 87.5%for ovatide and Cystorelin,respectively(p>0.05),and pregnancy rates were 0%and 12.5%for ovatide and Cystorelin,*** were no significant differences between the two *** was concluded that treatment of Bunaji cows with 50μg ovatide in Ovsynh protocol has heat and ovulation synchronization potentials and zero pregnancy *** was recommended that further studies be carried out using graded doses of 50,100 and 150μg of ovatide in a fixed time AI synchronization protocol in Bunaji cows,to tap the potentials of the hormone in manipulation of bovine reproduction.

关键词： Pregnancy ovatide fixed time AI synchronization cows

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