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- ItemSorption Study of Cd(II) from Aqueous Solution Using Activated Carbon Prepared from Vitellaria paradoxa Shell(OMICS, 2015-02-14) Jimoh AA, Adebayo GB, Otun KO, Ajiboye AT, Bale AT, Jamiu W and Alao FOActivated carbon prepared from vitellaria paradoxa (shea nut) shell using otho-phosphoric acid has been used for the removal of Cd(II) ion from aqueous solution. The adsorbent sample was characterized by some physicochemical and spectroscopic parameters such as pH, point of zero charge (PZC), moisture content, iodine number, loss on ignition, bulk density, XRF, SEM and TEM. The pH and the PZC of the sample were found to be 4.0 and 5.8 respectively. The adsorbent sample has moisture content of 5.22 ± 0.1%, iodine number of 456.50 ± 59%, loss on ignition 10.71 ± 0.18% bulk density of 0.84 ± 0.09%. The XRF analysis indicated that Ca, Si and Fe were major constituents in the adsorbent sample. The SEM and TEM analysis results indicated good adsorptive characteristics of the adsorbent. Result from the FTIR analysis indicate presence of some important components such as C=O, O-H, C-O N-H, and P-H which responsible for high adsorptive capacity of the adsorbent. The equilibrium adsorption of Cd(II) ion data was well fitted with Langmuir and Freundlich isotherms with correlation coefficient of 0.996 and 0.998 respectively. The kinetic study revealed that pseudo-second order kinetic was better fitted compared to pseudo first-order kinetic. Thermodynamic experiment indicated that the adsorption process was exothermic with ∆H equals +27.84 KJ/mol and ∆S equals -0.993 KJ/molK.
- ItemBioremediation Process ofEffluent fromDetergent andFood Industries inJos, Nigeria: Kinetics andThermodynamics(International Journal of Engineering Science Invention (IJESI), 2018-03-14) Akeem Adebayo Jimoh, Adebayo Ganiyu Babatunde, Dauda Baba, Abdullateef BabaIn This Present Study, The Reduction Trends in Total Solids (TS) of Effluents from Food and Detergent Industries were used to determine the rate of Remediation using Immobilized Bacterial Substrates. Two different Bacteria Pseudomonas Spp and Bacillus Spp were isolated from Food Effluent (FE) and Detergent Effluents (DE) and were used for their remediation study. The results showed that the reduction in Total Solids (TS) ranged between 11.55% and 84.26% for Food Effluent and 17.89% and 97.84% for Detergent Effluent (DE) Respectively. The Reductions in TS were subjected to zero and first order kinetics. The rate constant for TS reduction for zero order kinetics were ranged (FE 0.095-0.758 Mg/L/Day and DE 0.036-1.029 Mg/L/Day) and first order kinetics also ranged (FE 0.015-0.238 D-1 and DE 0.015-0.42 D-1 ). The kinetic models’ results showed that both the TS reduction for Pseudomonas Spp. and Bacillus Spp. used in this research followed both the zero order and first order kinetics.
- ItemBiosynthesis of Ag and TiO2 nanoparticles and the evaluation of their antibacterial activities(Elsevier, 2022-04-20) A.A.Jimoh, B.HAkpeji, S.O.Azeez, Y.O.Ayipo, Z.A.Abdulsalam, Z.F.Adebayo, A.T.Ajao, A.T.Zakariyah and E.E.ElemikeIn this study, Pseudomonas aeruginosa was used for the synthesis of silver and titanium oxide nanoparticles (Ag and TiO2 NPs). The nanoparticles were prepared by mixing the supernatant solution of the cultured organism and the solution of silver nitrate and titanium tetrabutoxide. UV–Vis spectroscopic analysis gave absorption peak at wavelength of 414 nm and 390 nm for Ag and TiO2 NPs respectively. The FTIR spectra gave absorption bands attributed to N–H stretch of the peptide linkages, O–H stretch of carboxylic acid, amide bend, and –C––O stretch which may have emanated from the micro-organism. The powdered X-ray diffraction (PXRD) studies revealed the crystalline nature of AgNPs and TiO2 NPs while microscopic studies showed spherical and dispersed morphologies with average particle size of 7.27 nm and 6.83 nm for Ag and TiO2 NPs respectively. Antibacterial analysis of the synthesized nanoparticles showed broad spectrum inhibition against disease causing microor ganisms with TiO2NPs exhibiting excellent results more than AgNPs and the control drugs
- ItemValorization of sawdust by co-composting with food waste using a small-scale composter(Islamic Azad University-Isfahan (Khorasgan) Branch-Iran, 2022-06-20) Hadi Bello, Akeem Adebayo JimohThis study aimed to produce a value-added product by co-composting sawdust with food waste using a small scale composter. The composting experiment was carried out using 60L composting bins with a hole of 3 mm and 10 cm apart drilled on its side. Three experimental trials 1, 2 and 3 were adopted in this study with mixture of sawdust and food waste (Trial 1= 80% sawdust + 20% food waste, Trial 2 = 70% sawdust + 30% food waste, Trial 3 = 60% sawdust + 40% food waste). The composting process lasted for 90 days. Parameters examined throughout the composting process include temperature, moisture content, pH, electrical conductivity, organic matter content, and organic matter losses. The results indicated that all the compost trials exhibit good development of composting process, with the highest solid organic degradation reached in a shorter period in compost trial 3. The temperature profile of the three trials are the same and above 60 0C after 30 days of composting. The compost samples had a pH ranging from 5.9 to 9.4. The electrical conductivity of the three composting trials was following the recommended value. The best compost trial that produces quality compost is compost trial 3. The results showed that all composts obtained were stable and matured. In brief, recycling sawdust through the composting process to obtain valuable end products is adequate but in the presence of nitrogen-rich waste, such as waste food materials.
- ItemSmall-molecule inhibitors of bacterial-producing metallo-β-lactamases: insights into their resistance mechanisms and biochemical analyses of their activities(2023-03-31) Ayipo, Y. O.; Chong C. F.; Mordi, M. N.Antibiotic resistance (AR) remains one of the major threats to the global healthcare system, which is associated with alarming morbidity and mortality rates. The defence mechanisms of Enterobacteriaceae to antibiotics occur through several pathways including the production of metallo-β-lactamases (MBLs). The carbapenemases, notably, New Delhi MBL (NDM), imipenemase (IMP), and Verona integron-encoded MBL (VIM), represent the critical MBLs implicated in AR pathogenesis and are responsible for the worst ARrelated clinical conditions, but there are no approved inhibitors to date, which needs to be urgently addressed. Presently, the available antibiotics including the most active β-lactam-types are subjected to deactivation and degradation by the notorious superbug-produced enzymes. Progressively, scientists have devoted their efforts to curbing this global menace, and consequently a systematic overview on this topic can aid the timely development of effective therapeutics. In this review, diagnostic strategies for MBL strains and biochemical analyses of potent small-molecule inhibitors from experimental reports (2020- date) are overviewed. Notably, N1 and N2 from natural sources, S3–S7, S9 and S10 and S13–S16 from synthetic routes displayed the most potent broad-spectrum inhibition with ideal safety profiles. Their mechanisms of action include metal sequestration from and multi-dimensional binding to the MBL active pockets. Presently, some β-lactamase (BL)/MBL inhibitors have reached the clinical trial stage. This synopsis represents a model for future translational studies towards the discovery of effective therapeutics to overcome the challenges of AR.