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Rheological study of nanoparticle-based cationic surfactant solutions

Petroleum 2022年第4期8卷 522-528页

作者： Ayomikun Bello Joy Ozoani adewale adebayo Dmitriy Kuriashov Skolkovo Institute of Science and Technology MoscowRussia Moscow Engineering Physics Institute MoscowRussia Higher School of Economics MoscowRussia Kazan National Research Technological University KazanRussia

Worm-like micelles are of special interest among the many forms of surfactant aggregates because of their usefulness in research and *** are elongated,flexible aggregates formed by amphiphilic molecules spontaneously self-organizing in *** nature of the surfactant determines its unique shape,which may be altered by mixing it with other substances or changing physicochemical variables like as temperature,pH,or *** rheology of viscoelastic fluid systems is currently being modified using *** method,which was just introduced about 10 years ago,has shown to be highly promising,producing significant improvements in rheological properties,particularly at reservoir *** goal of this research is to investigate and assess the rheology of an aqueous cationic surfactant solution based on graphene oxide *** thermodynamics,structure and rheology of nanoparticle-based cationic surfactant solutions were investigated *** to structural and thermodynamic investigations in surfactant-nanoparticle mixtures,micellenanoparticle interactions arise as physical crosslinks between *** existence of these interactions is shown to generate considerable viscosity and viscoelasticity in wormlike micelles,even when the fluid is Newtonian in the absence of *** viscosity,shear modulus and relaxation time all increase as particle concentration *** nanoparticles generates a network of micellar entanglements as a result of *** results demonstrate that adding nanoparticles to surfactant solutions provides for a one-of-a-kind method of altering fluid rheology under a range of circumstances.

关键词： Surfactant Wormlike micelles Nanoparticles Viscosity Modulus Rheology

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Iso-propyl caprylate and iso-propyl linolenate synthetic fluids as novel alternatives in deep-water drilling operations:Critical fluid properties and aerobic biodegradability assessments

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Petroleum 2024年第2期10卷 254-264页

作者： adewale Johnson Folayan adewale Dosunmu Aleruchi Boniface Oriji Department of Petroleum and Gas Engineering University of Port HarcourtNigeria Professor of Petroleum and Gas Engineering University of Port HarcourtNigeria

Present drilling fluids for deep water wells have severe degenerative effect on the environment with high operational and disposal ***,making them less desirable in recent *** synthetic drilling fluid provides a novel environmentally friendly alternative but conventional ester-based drilling fluids exhibit high viscosities in deep-water wells causing excessive equivalent circulating density(ECD)and increased risk of lost circulation owing to narrow mud density *** study experimentally investigates the critical fluid properties and aerobic biodegradability potentials of two newly developed deep-water synthetic ester drilling fluids namely:iso-propyl caprylate(COIPE)and iso-propyl linolenate(LOIPE)synthetic fluids and their comparison with synthetic-paraffin(SP-SBF)and isomerized-olefin(IOSBF)synthetic hydrocarbon *** esters of iso-propyl caprylate and iso-propyl linolenate were produced from the isolation of ester mixtures that were obtained from the homogeneous catalytic transesterification of coconut and linseed plant oil biomass *** COIPE was isolated from the coconut oil iso-propyl ester mixture by low-pressure fractional distillation *** fractional distillation and crystallization were used to isolate the LOIPE ester from the linseed oil iso-propyl ester ***,the aerobic biodegradation investigation was conducted by a modified oxygen consumption respirometry *** GC-MS analysis of the COIPE and LOIPE showed that the former contains essentially of lower saturated carbon compounds(C8).Whereas the latter contains higher molecular weight and unsaturated carbon compounds(C18+).The COIPE and LOIPE kinematic viscosity values are in good agreement with that of the reference synthetic hydrocarbon fluid samples(SP-SBF and IO-SBF).Although,the COIPE synthetic ester has lower viscosity value owing to the presence of shorter chain and saturated carbon atoms(C8 esters).Similarly,the linolenic oil iso

关键词： Aerobic biodegradation Critical fluid properties Deep-water wells Esters'isolation:isomerized-olefin(IO-SBF) Iso-propyl caprylate(COIPE) Iso-propyl linolenate(LOIPE) Respirometry technique Synthetic-paraffin(SP-SBF)

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Processing Compressed Expanded Natural Graphite for Phase Change Material Composites

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Journal of Thermal Science 2023年第3期32卷 1213-1226页

作者： Alexander BULK adewale ODUKOMAIYA Ethan SIMMONS Jason WOODS National Renewable Energy Laboratory 15013 Denver West ParkwayGoldenCO 80401USA

Phase change materials(PCMs)are used in various thermal energy storage applications but are limited by their low thermal *** method to increase conductivity involves impregnating organic PCMs into highly porous conductive matrix *** these materials,compressed expanded natural graphite(CENG)matrices have received the most *** this attention,the effect that CENG processing has on PCM saturation and overall matrix thermal conductivity has not been fully ***,the effect of the heat treatment process used to expand intercalated graphite flakes is evaluated *** heat treatment temperatures yielded higher saturation rates and overall saturation at similar matrix *** example,increasing temperature from 300℃to 700℃resulted in approximately 60%-70%increase in pore saturation after 100 minutes of *** exposure time to heat treatment had less of an effect on PCM *** exposure time had negligible effect above 30 min and above 500℃heating ***,because the expanded graphite was found to oxidize around 700℃,the use of longer exposure time in manufacturing applications can be beneficial if a shortened impregnation time is *** treatment conditions did not impact thermal *** composite latent heat of fusion was also reduced approximately proportionally to the PCM mass fraction.A local maximum in axial thermal conductivity was observed at around 83%porosity,which is similar to previous *** observed conductivity at this maximum was a factor of 81 times greater than the conductivity of the PCM.

关键词： phase change materials thermal energy storage compressed expanded natural graphite thermal conductivity enhancement porous material sorptivity composite matrix

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Recent improvements in oily wastewater treatment:Progress, challenges, and future opportunities

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Journal of Environmental Sciences 2015年第11期27卷 15-30页

作者： Sanaa Jamaly adewale Giwa Shadi Wajih Hasan Institute Center for Water and Environment Department of Chemical and Environmental Engineering Masdar Institute of Science and Technology

Oily wastewater poses significant threats to the soil, water, air and human beings because of the hazardous nature of its oil contents. The objective of this review paper is to highlight the current and recently developed methods for oily wastewater treatment through which contaminants such as oil, fats, grease, and inorganics can be removed for safe *** include electrochemical treatment, membrane filtration, biological treatment,hybrid technologies, use of biosurfactants, treatment via vacuum ultraviolet radiation,and destabilization of emulsions through the use of zeolites and other natural *** review encompasses innovative and novel approaches to oily wastewater treatment and provides scientific background for future work that will be aimed at reducing the adverse impact of the discharge of oily wastewater into the environment. The current challenges affecting the optimal performance of oily wastewater treatment methods and opportunities for future research development in this field are also discussed.

关键词： Oily wastewater Electrochemical Biological Membrane Treatment

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Comparative assessment of intestinal helminths prevalence in Water,Sanitation and Hygiene(WASH) intervention and non-intervention communities in Abeokuta,Nigeria

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Asian Pacific Journal of Tropical Biomedicine 2017年第6期7卷 524-532页

作者： Oluwaseyi Tunrayo Taiwo Sammy Olufemi Sam-Wobo Olufunmilayo Ajoke Idowu adewale Oladele Talabi adewale Matthew Taiwo Department of Pure & Applied Zoology Federal University of AgricultureAbeokutaNigeria Department of Veterinary Medicine & Surgery Federal University of AgricultureAbeokutaNigeria Department of Environmental Management & Toxicology Federal University of AgricultureAbeokutaNigeria

Objective:This study compared the prevalence of intestinal helminths in Water,Sanitation and Hygiene(WASH) intervention and non-intervention communities in Abeokuta,***:Stool samples were collected from 225 respondents in a study carried out between July and November,*** samples were examined for presence of helminths using Formol-Ether concentration *** collected from stool samples were analyzed using SPSS for Windows(version 16).Results:Results showed that,at the intervention community,88 out of 113 respondents were infected with at least one helminth infection while at non-intervention community,80 out of 112 respondents were *** result revealed overall helminth prevalence of78% at Mawuko and 71% at *** both intervention(Mawuko) and non-intervention(Isolu) communities,hookworm was the most prevalent helminth observed(21% and18%,respectively) followed by Ascaris lumbricoides(13% and 13%,respectively),Taenia sp.(4% and 3%,respectively) and Trichostrongylus sp.(1% and 3%,respectively).Cases of single infections of Trichuris trichiura,Strongyloides stercoralis and Hymenolepsis nana were observed only at the non-intervention ***,*** occurred in the multiple infections observed at the intervention *** more(p < 0.05) cases of infections were observed in male(46%) at the intervention community than female(31%) while in non-intervention community females(39%) were significantly(p < 0.05) more infected than their male counterparts(32%).Conclusions:This study concludes that the Community Led-Total Sanitation intervention programme,which was executed in Mawuko was not effective as expected.

关键词： Intestinal helminths WASH intervention Sanitation Infections Prevalence

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Entry qualifications and academic performance of architecture students in Nigerian Polytechnics： Are the admission requirements still relevant？

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Frontiers of Architectural Research 2014年第1期3卷 69-75页

作者： Peter 0 adewale Olasunmbo Bolanle Adhuze Department of Architectural Technology The Federal Polytechnic Ado-Ekiti Ekiti-State Nigeria

The competence of fresh graduates of architecture has been continuously criticized by the industry for inadequate knowledge. This is often blamed on the poor standard of education evidenced by poor performances in professional and degree/diploma examinations conducted by various schools of architecture in the country. Although, factors responsible for the scenario are wetl documented in the literature, most of these works are based on testimonial and circumstantial evidences relating to management of architectural education only. The aim of this paper is to investigate the relationship between entry qualifications and the performance of architecture students in Nigerian Polytechnics with a view to determining the relevance of current admission policy to architectural education in Nigeria. Data were obtained from official records in the Department of Architecture in four randomly selected polytechnics in the southwestern part of Nigeria. Pearson Product Moment Corretation （r） was used to test the hypotheses. Findings reveal weak relationship between the two variables （physics and mathematics）. This is contrary to the expectations of most schotars and policy makers who opine that studentst proficiency in these subjects would enhance their performance at higher LeveLs. The paper traces the contradiction to the poor handling of public examinations and misconception of architecture as being pure science. It holds that if these requirements are still relied upon for the admission of students into schools of architecture, wrong candidates wouldcontinue to gain entry into the profession. The paper concludes by recommending certain measures that are capable of reversing the trend.

关键词： Academic perfor-mance Admission criteria Architecture Arts Education Science

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

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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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A perspective on environmental sustainability in the cement industry

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Waste Disposal and Sustainable Energy 2020年第3期2卷 161-164页

作者： Joshua O.Ighalo adewale George Adeniyi Department of Chemical Engineering Faculty of Engineering and TechnologyUniversity of IlorinIlorin P.M.B.1515Nigeria

Cement production is a major contributor to anthropogenic CO_(2) emissions and solid waste *** paper discusses some of the key issues as regards the slow progress in achieving environmental sustainability in the cement ***-niques such as carbon capture and storage(CCS),material substitution,alternative fuels and energy efficient technologies have been proposed as means of mitigating the negative environmental impact of cement *** was observed that much progress has been made in the area of eco-friendly research *** innovations(considered as disruptive by the mega co-operations)have had issues at the entrepreneurial *** so-called disruptive technologies have strug-gled to meet some performance requirements and satisfy funding evaluators thus are still difficult to fully *** systematisation of the environmental sustainability problem was discussed as a possible way forward both in the environ-mental,economic and social *** into the future,a greater emphasis on systematised decision-based approach could help breach the gap between on-paper plans and practical implementations to achieve environmental sustainability.

关键词： Cement Environment Waste Global warming Pollution Sustainability

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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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Mathematical modeling of drying characteristics of Jew’s mallow(Corchorus olitorius)leaves

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Information Processing in Agriculture 2019年第1期6卷 109-115页

作者： adewale Olusegun Omolola Patrick Francis Kapila Henry Mbitha Silungwe Department of Agricultural&Rural Engineering School of AgricultureUniversity of VendaPrivate Bag X5050Thohoyandou 0950South Africa Department of Food Science&Technology School of AgricultureUniversity of VendaPrivate Bag X5050Thohoyandou 0950South Africa

Drying behaviour of Jew’s mallow leaves using an oven dryer was *** influence of drying temperatures(50,60 and 70C)on moisture content of the leaves at stable air velocity was *** drying models,including,simple exponential,Page,Two-term exponential,Logarithmic,and Wang and Singh were fitted to drying ***-term exponential model adequately express the drying behaviour of Jew’s mallow *** moisture diffusivity of Jew’s mallow leaves ranged from 8.18×10^-8 to 1.13×10^-7m^2/*** of the computed effective diffusivity on oven temperature was *** energy required for oven drying of Jew’s mallow leaves was found to be 14.84 kJ/*** L^*,a^*,b^*,DE,a^*/b^*colour characteristics of the dried leaves range from 31.8 to 32.87,-3.73 to-4.37,13.6 to 16.47,69.00 to 69.73,and-0.26 to-0.34 *** drying conditions of 50℃150 min and 70℃90min resulted to dried leaves with desirable colour characteristics.

关键词： Jew’s mallow Oven drying Mathematical modeling Colour Effective diffusivity Activation energy

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