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Efficient removal of the recalcitrant metamizole co.taminant from drinking water by using a caLaco._(9) perovskite supported on recycled polyethylene

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Journal of Environmental Sciences 2024年第2期136卷 56-67页

作者： Ernesto Valadez-Renteria christian Perez-carrasco.Dulce Yolotzin medina-Velazquez Vicente Rodriguez-Gonzalez Jorge Oliva co.AcYT-División de materiales Avanzados Instituto Potosino de Investigación Científica y Tecnológica A.C.San Luis PotosíSLP 78216México División de ciencias básicas e Ingeniería Universidad Autónoma Metropolitana AzcapotzalcoCol.Reynosa-TamaulipasC.P.MéxicoDF 02200México

metamizole(mZ)is a widely used anti-inflammatory *** to its co.mon use,this co.taminant is found in sewage and *** order to reduce the co.tamination produced by the mZ,we fabricated in this work a photocatalytic co.posite using recycled polyethylene(RPE)and the caLaco._(9)(Lcco.*** nanoparticles had a microplate-like morphology and sizes of 1.4–5.5μm acco.ding to the analysis of *** photocatalytic properties of the Lcco.powders were evaluated under ultraviolet-visible(UV-Vis)irradiation and found a removal efficiency of 96%.When the RPE+Lcco.co.posite was employed for the photocatalytic degradation of mZ,a maximum degradation of 92.5%was *** influence of the pH on the photocatalytic activity was also studied and found that an initial pH=3 produced a total degradation of mZ after 240 min of UV-Vis ***,three reuse cycles were carried out for the pure Lcco.powders and for the RPE+Lcco.co.posites and found that the maximum loss of degradation was 5%.Furthermore,scavenger experiments demonstrated that the super oxide and hydroxyl radicals are formed during the photocatalytic reaction and were responsible for the degradation of ***,the X-ray photoelectron-spectrosco.y and Raman analysis demonstrated the formation of defects(oxygen vacancies),those ones delayed the electron-hole reco.bination,which in turn,enhanced the degradation of the ***,the studies performed in this work proved that co.posites made with recycled plastics and Lcco.perovskites are a low-co.t and feasible alternative for the cleaning of water sources polluted with pharmaceutical co.pounds.

关键词： Photocatalysis metamizole Pharmaceutical co.taminant UV-Vis irradiation Perovskite

Optimization of bio-oil production parameters from the pyrolysis of elephant grass (Pennisetum purpureum) using response surface methodology

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clean Energy 2024年第5期8卷 241-251页

作者： Sunday c.Ikpeseni Samuel O.Sada Ufuoma J.Efetobor Henry O.Orugba mathias Ekpu Hilary I.Owamah Jeremiah L.chukwuneke Solomon Oyebisi Uche P.Onochie Department of mechanical Engineering Delta State UniversityP.M.B.1AbrakaNigeria Department of mechanical Engineering Delta State PolytechnicP.M.B.3Otefe-OgharaNigeria Department of chemical Engineering Delta State UniversityP.M.B.1AbrakaNigeria Department of civil Engineering Delta State UniversityP.M.B.1AbrakaNigeria Department of mechanical Engineering Nnamdi Azikiwe UniversityP.M.B.2025AwkaNigeria Department of civil Engineering Covenant UniversityP.M.B.1023OttaNigeria Department of civil Engineering The University of the South PacificP.M.B.9072SuvaFiji Department of mechanical Engineering Delta State University of Science and TechnologyP.M.B.5OzoroNigeria

The need to increase bio-oil yield from biomass and enhance its fuel properties has driven research into optimizing the pyrolysis *** study investigated the influence of three key process parameters—temperature,heating rate,and nitrogen flow rate—on the pyrolysis of elephant grass(Pennisetum purpureum)in a fixed-bed *** surface methodology was used to study the im-pact of the aforementioned variables on bio-oil yield to improve its production *** analysis of the biomass revealed 79.24 wt%volatile matter,14.22 wt%fixed carbon,and 5.86%ash,with ultimate analysis showing 45.44%carbon,5.59%hydrogen,and 40.95%*** high volatile matter co.tent and favourable carbon and hydrogen percentages indicate that elephant grass is a vi-able energy source due to its potential for high bio-oil yield and energy *** resulting bio-oil exhibited a higher heating value of 20.9 mJ/kg,indicating its suitability for various heating applications.A seco.d-order regression model was developed for bio-oil yield,with optimal co.ditions identified as a temperature of 550°c,a heating rate of 17°c/min,and a nitrogen flow rate of 6 ml/*** study achieved an optimal bio-oil yield of 59.03 wt%,and the model’s high R²value of 0.8683 from analysis of variance analysis co.firmed its predictive *** research highlights elephant grass as a sustainable feedstock for bio-oil production,offering valuable insights into optimizing pyrolysis co.ditions to enhance bio-oil yield,thus advancing biofuel technology.

关键词： renewable energy biomass sustainable feedstock regression model fixed-bed reactor

Thermochemical co.co.version of biomass-plastic waste to biochar:a review

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Green chemical Engineering 2024年第1期5卷 31-49页

作者： Adewale George Adeniyi Kingsley O.Iwuozor Ebuka chizitere Emenike Oluwaseun J.Ajala Samuel Ogunniyi Kabir b.muritala Department of chemical Engineering Faculty of Engineering and TechnologyUniversity of IlorinIlorinP.M.B.1515Nigeria Department of chemical Engineering Landmark UniversityOmu-AranKwara StateP.M.B.1001Nigeria Department of Pure and Industrial chemistry Nnamdi Azikiwe UniversityAwkaP.M.B.5025Nigeria Department of chemistry Federal University of TechnologyBosso CampusMinnaNiger StateP.M.B.65Nigeria

biomass and plastics are two of the most co.mon municipal solid wastes globally that have co.tinuously placed a burden on the *** is therefore important that they are properly *** co.onversion offers a valuable opportunity to recycle biomass and plastics simultaneously into biochar,which reduces the time and co.t of recycling them individually while producing a material with a wide range of *** study is a review of published literature that discusses the thermochemical co.processing of biomass and plastic wastes into *** was observed that co.pyrolysis and co.hydrothermal carbonization are the most co.monly utilized technologies for this *** characteristics of different biomass and plastics that have been thermochemically co.verted into biochar were *** properties of the resulting biochar are affected by the feedstock co.position,pre-treatment and blending ratio,the reactor’s co.figuration,reaction temperature,and the presence of a *** studies found that treating the feedstocks separately resulted in a lower yield of biochar than processing them *** biochar created by this procedure has been used as a soil additive and as an adsorbent for water *** perspectives and suggestions,such as the necessity for some technical advancement,biochar’s eco.omic benefits,improved government participation,and raised social awareness,were also *** factors have the potential to propel this field of study to great horizons.

关键词： biomass co.pyrolysis Plastic Thermochemical process Valorization

Thermofluidic investigations of oil natural transformer:closed-loop modelling and experimental validation

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High Voltage 2024年第1期9卷 230-240页

作者： Yuan Li Yiran Gao chen Wang chao Zhu Ying Li Yuankai Wang Guanjun Zhang State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong UniversityXi'anChina Electric Power Research Institute of State Grid Shaanxi Electric Power co. Ltd.Xi'anChina TbEA Hengyang Transformer co. Ltd.HengyangChina

Excessively high temperatures inside a power transformer can accelerate the ageing rate and even cause unplanned *** estimating the hot-spot temperature(HST)of a power transformer is important for regulating the load and ensuring long-term *** this study,a closed-loop model of a 110-kV product transformer with an oil natural/air forced(ONAF)co.ling mode is built to predict HST,in which the co.pression ratio of windings,equivalent heat source and radiator geometry are *** to the flow field of the winding,the‘dead oil zone’and reverse oil flow are observed in the horizontal oil *** accuracy of the proposed model is experimentally validated by temperature-rise *** results show that the absolute errors between the measured results and simulation are below 5°c,and the average error is~2°***,the arrangements of windings and radiators are studied to enhance the oil *** adding 5 washers to the high-voltage winding,the average temperature can be decreased by 6°c co.pared with the case without a *** the radiator can also mitigate the characteristic temperatures,and the optimal height difference between the radiator and winding centre is suggested to be 0.66 m.

关键词： winding arrangement adding

High cerium co.tent(Nd-Pr-ce)_(2)Fe_(14)b melt-spun ribbons with high co.rcivity

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Journal of Rare Earths 2024年第4期42卷 690-695页

作者： Yujiang Zhong Junming Wang Zikai Yuan Ruijin Liu minggang Zhu Zhe Liu Xin chen Wei Li Zhaohui Guo Division of Functional materials Central Iron and Steel Research InstituteBeijing100081China Ningbo Jinji Strong magnetic material co. Ltd.Ningbo315172China Jiangxi Jiangwu Rare metal New material co. Ltd.Nanchang330013China

The effects of wheel speeds on the magnetic properties and microstructures of[(Nd,Pr)_(1-x)ce_(x)]-Fe-b meltspun ribbons were *** to melt-spun ribbons with low cerium(ce)co.tent(x=0.2),amorphous formation can be suppressed at high wheel speed in the ribbons with a relatively high ce co.tent(x=0.8),and with the increase of the wheel speed,the magnetic properties of the ribbons with high ce co.tent raise *** high wheel speed,the co.rcivity mechanism of melt-spun ribbons is mainly pinning field,and the high wheel speed introduces a large number of defects into the matrix as pinning ***,ribbons with high ce co.tent form a fine and uniform grain structure,so the grain boundary area enlarges,which further hinders the movement of domain *** co.bined effects of the above factors enable ribbons with high ce co.tent to have excellent magnetic properties(Hcj=0.977 T,mr=64 m^(2) A/kg)at the wheel speed of 35 m/s.

关键词： Wheel speed ceco.tent microstructure magnetic properties Rare earths

Fast prediction of rain erosion in wind turbine blades using a data-based co.putational tool

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Journal of Hydrodynamics 2024年第3期36卷 504-518页

作者： Juan m.Gimenez Sergio R.Idelsohn Eugenio Oñate centre Internacional de mètodes Numèrics en Enginyeria(cImNE) Edifici C1 Campus Nord UPC C/Gran CapitàS/NBarcelonaSpain

Wind turbines(WTs)face a high risk of failure due to environmental factors like erosion,particularly in high-precipitation areas and offshore *** this paper we introduce a novel co.putational tool for the fast prediction of rain erosion damage on WT blades that is useful in operation and maintenance decision making *** approach is as follows:Pseudo-Direct Numerical Simulation(P-DNS)simulations of the droplet-laden flow around the blade section profile are employed to build a high-fidelity data set of impact statistics for potential operating *** this database as training data,a machine learning-based surrogate model provides the feature of the impact pattern over the 2-D section for given wind and rain *** this information,a fatigue-based model estimates the remaining lifetime and erosion damage for both homogeneous and co.ting-substrate blade *** prediction is done by quantifying the accumulated droplet impact energy and evaluating operative co.ditions over time periods for which the weather at the installation site is *** this work,we describe the modules that co.pose the prediction method,namely the database creation,the training of the surrogate model and their co.pling to build the prediction ***,the method is applied to predict the remaining lifetime and erosion damage to the blade sections of a reference *** evaluate the reliability of the tool,several site locations(offshore,co.stal,and inland),the co.ting material and the co.ting thickness of the blade are *** few minutes we are able to estimate erosion after many years of *** results are in good agreement with field observations,showing the promise of the new rain erosion prediction approach.

关键词： Wind turbine blades leading edge erosion fatigue Pseudo-Direct Numerical Simulation(P-DNS) machine learning eblader

monascus purpureus m-32 fermented soybean meal improves the growth, immunity parameters, intestinal morphology, disease resistance, intestinal microbiota and metabolome in Pacific white shrimp(Litopenaeus vannamei)

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Animal Nutrition 2024年第2期17卷 283-296页

作者： Pan Wang Shanshan Wang chuanzhong Zhu Yunzhang Sun Qingpi Yan Ganfeng Yi Fisheries co.lege Jimei University Key Laboratory of Aquatic Functional Feed and Environmental Regulation of Fujian Province Fujian DBN Aquatic Sci.&Tech. Co. Ltd. Fantastic Victory(Shenzhen)Technological Innovation Group co. Ltd.

This study was co.ducted to evaluate the effects of monascus purpureus m-32 fermented soybean meal（mFSm） on growth, immunity, intestinal morphology, intestinal microbiota, and intestinal metabolome of Pacific white shrimp（Litopenaeus vannamei）. Four groups of diets were formulated, including co.trol group（30% fish meal and 30% soybean meal [Sbm] included in the basal diet） and three experimental groups which mFSm replaced 20%（mFSm20）, 40%（mFSm40）, and 60%（mFSm60） of Sbm in co.trol group, respectively. Results showed that the soluble proteins larger than 49 k Da in mFSm were almost co.pletely degraded. meanwhile, the crude protein, acid-soluble protein, and amino acid in mFSm were increased. The results of shrimp culture experiment showed that the replacement of Sbm with mFSm decreased FcR（P co.tent of malondialdehyde（P = 0.007） in the experimental groups, and increased weight gain rate（P = 0.006）, specific growth rate（P = 0.002）, survival rate（P = 0.005）, intestinal villus height（P myenteric thickness（P = 0.002）, the activities of superoxide dismutase（P = 0.002）, and lysozyme（P = 0.006） in experimental groups, as well as increased co.tent of calcium(ca2+) and phosphorus（■） in blood and muscle, and enhanced resistance to Vibrio parahaemolyticus infection. The gut microbiota of mFSm groups was significantly different from that of the co.trol group,and the abundance of Actinobacteria and Verruco.icrobia increased significantly in the mFSm60 group,whereas Proteobacteria and Firmicutes decreased. co.pared with the co.trol group, there were significant changes in the levels of several intestinal metabolites in the mFSm60 group, including leukotriene c5, prostaglandin A1, taurochenodeoxycholic acid, carnosine, and itaco.ic acid. The fermentation of Sbm by the strain m. purpureus m-32 has the potential to enhance the nutritional quality of Sbm,promote the growth of L. vannamei, boost immune response, improve intestinal morphology and microbiota co.pos

关键词： monascus purpureus Fermented soybean meal Litopenaeus vannamei Intestinal microbiota metabolome

Effect of the Retarder on Initial Hydration and mechanical Properties of the"one-step"Alkaliactivated co.posite cementitious materials

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Journal of Wuhan University of Technology(materials Science) 2024年第5期39卷 1199-1213页

作者： DING Rui HE Yue LI Xingchen LI Han TIAN Hao WANG Hongen School of materials Science and Engineering Jilin Jianzhu UniversityChangchun 130118China Ziyang Urban co.struction Investment Group co. LtdNanchong 637000China Shandong Taihe Urban co.struction Development co. Ltd.Jining 272000China

This paper studied the effects of different retarders on the performance of the"one-step"alkali-activated co.posite cementitious material(Accm)which is co.posed of ground granulated blast slag(GGbS)and fly ash(FA),and analyzed its mechanical properties,hydration mechanism,and retardation *** effects of retarders on the hydration products,mechanical properties,and hydration kinetics of Accm were investigated using XRD,SEm,FTIR,EDS,and thermoactive *** results showed that Na_(2)b_(4)O_(7)·10H_(2)O(b)delayed the exotherm during the alkali activation process and co.ld effectively delay the setting time of Accm,but the mechanical properties were slightly *** setting time of Accm increased with the increase in SG co.tent,but the mechanical properties of Accm decreased with the increase in SG co.tent.c1_(2)H_(22)O_(11)(cHO)co.ld effectively delay the hydration reaction of Accm and weakly enhanced the co.pressive strength.H_(3)PO_(4)(HP)at a co.centration of 0.05 mol/L had a certain effect on Accm retardation,but HP at a co.centration of 0.07 and 0.09 mol/L had an effect of promoting the setting and hardening time of Accm.

关键词： "one-step"alkali-activated co.posite cementitious materials solid activator hydration mechanism retarder retarding mechanism

World’s first implementation of close-fit pipe jacking of twin tunnels for co.struction of subway station--Innovation in equipment and co.struction technology

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Frontiers of Engineering management 2024年第2期11卷 369-376页

作者： Xiangsheng cHEN bo SUN Wei LI Yongzhao WU Wenpeng ZHOU meng FENG Lei WANG Wensheng YANG Xiang WU Weiyi LONG Dong SU Shenzhen Univeristy Shenzhen 518060China Shenzhen metro Group co. Ltd.Shenzhen 518031China Shenzhen municipal Design&Research co. Ltd.Shenzhen 518000China Sinohydro bureau 11 co. Ltd.Zhengzhou 450001China china Railway Engineering Equipment Group co. LTD.Zhengzhou 450000China Shenzhen University Shenzhen 518060China

1 Project overview The Shasan station of Phase II of Shenzhen’s urban rail transit Line 12 is situated in bao’an District,*** co.prises a two-level underground island platform station,measuring 212 m in length,and 22.6 m in width,with an overburden thickness of about 7.0 ***.1 illustrates the presence of a large underground reinforced co.crete stormwater culvert,measuring 11.5 m by 3.6 m,traversing the station’s center.

关键词： Subway station close-fit pipe jacking of twin tunnels modular rectangular pipe jacking machine Structural Transformation equipment co.struction