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Synthesis and optimization of high surface area mesoporous date palm fiber-based nanostructured powder activated carbon for aluminum removal

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Chinese Journal of Chemical Engineering 2021年第4期34卷 472-484页

作者： Alfarooq o.Basheer Marlia M.Hanafiah Mohammed Abdulhakim Alsaadi y.Al-Douri Abbas A.Al-Raad Department of Earth Sciences and Environment Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Centre for Tropical Climate Change System Institute of Climate ChangeUniversiti Kebangsaan MalaysiaBangi 43600SelangorMalaysia Nanotechnology and Catalysis Research Center(NANoCAT) University of Malaya50603 Kuala LumpurMalaysia National Chair of Materials Science and Metallurgy University ofNizwa611 NizawaOman University Research Center Cihan University SulaimaniyaSulaymaniyah 46002Iraq Department of Mechatronics Engineering Faculty of Engineering and Natural SciencesBahcesehir University34349 BesiktasIstanbulTurkey

Date palm fiber(DPF)derived from agrowaste was utilized as a new precursor for the optimized synthesis of a costeffective,nanostructured,powderactivated carbon(nPAC)for aluminum(Al3+)removal from aqueous solutions using carbonization,KoH activation,response surface methodology(RSM)and central composite design(CCD).The optimum synthesis condition,activation temperature,time and impregnation ratio were found to be 650℃,1.09 hour and 1:1,***,the optimum conditions for removal were 99.5%and 9.958 mgg 1 in regard to uptake *** optimum conditions of nPAC was analyzed and characterized using XRD,FTIR,FESEM,BET,TGA and Zeta ***,the adsorption of the Al3+conditions was optimized with an integrated RSMCCD experimental *** results revealed that the adsorption kinetics data was well fitted by the pseudosecond order model,whereas the adsorption isotherm data was best represented by the Freundlich isotherm *** activated carbon indicated that DPF can serve as a costeffective precursor adsorbent for Al^(3+)removal.

关键词： Agricultural waste Nanocomposites Wastewater treatment Industrial applications

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A novel Fe/HNT visible light-driven heterogeneous photocatalyst:Development as a semiconductor and photocatalytic application

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Progress in Natural Science:Materials International 2022年第3期32卷 273-281页

作者： Gizem Basaran Dindas Derya y.Koseoglu-Imer Huseyin Cengiz yatmaz Gebze Technical University Environmental Engineering Department Istanbul Technical University Environmental Engineering Department

Fe/HNT(Iron/Halloysite-nanotube) heterogeneous semiconductor catalysts operating effectively under visible light were developed by using FeCl3, FeSo4and Fe(oH)3sludge precipitated after electro-Fenton process and named as Fe/HNT-I, Fe/HNT-II and Fe/HNT-III, respectively. Chemical configuration and particle morphology of the catalysts were characterized with XRD, SEM-EDS and UV–vis DRS. Effect of the developed Fe/HNT photocatalysts was investigated for the degradation of Reactive orange 16(Ro16) textile dye under visible light. The photocatalytic decolorization of Ro16 was 95.6%, 99.3% and 96.6%, respectively. It was found that the photocatalytic performance of Fe/HNT-III catalyst under visible light was effective compared to Fe/HNT-I and Fe/HNTII. The iron ratio in the catalyst’s structure(Fe:HNT ratio 0.25, 0.5 and 0.75(w/w)) and p H value(4, 7 and 9) in production phase were also changed to investigate the photocatalytic effect of Fe/HNT-III. An Fe:HNT ratio of 0.25 and a p H of 4 were determined as the optimum conditions for catalyst production. optimum H2o2dosage value was also investigated for photocatalytic oxidation process and determined to be 10 m M. Finally, the optimum conditions were further used for the degradation of Terbinafine hydrochloride(Ter HCl) active drug and the treatment of wastewater from the textile and pharmaceutical industries.

关键词： Halloysite nanoclay Fe/HNT nanoparticle Catalyst Semiconductor Photocatalytic degradation Visible light

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Formability of friction stir processed low carbon steels used in shipbuilding

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Journal of Materials Science & Technology 2018年第1期34卷 237-244页

作者： D.M. Sekban S.M. Akterer o. Saray Z.y. Ma G. Purcek Department of Naval Architecture and Marine Engineering Karadeniz Technical University Trahzon Turkey Department of Autumotive Technology RecepTayyip Erdogan University Rize Turkey Department of Mechanical Engineering Bursa Technical University. Bursa Turkey Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Department of Mechanical Engineering. Karadeniz Technical University Trabzon Turkey Engineering Faculty Giresun University Giresun Turkey

The stretch formability of a low carbon steel processed by friction stir processing （FSP） was studied under biaxial loading condition applied by a miniaturized Erichsen test. one-pass FSP decreased the ferritic grain size in the processed zone from 25 μm to about 3 μm, which also caused a remarkable increase in strength values without considerable decrease in formability under uniaxial loading. A coarse-grained （CG） sample before FSP reflected a moderate formability with an Erichsen index （EI） of 2.73 mm. FSP slightly decreased the stretch formability of the sample to 2.66 ram. However, FSP increased the required punch load （FEI） due to the increased strength by grain refinement. FSP reduced considerably the roughness of the free surface of the biaxial stretched samples with reduced orange peel effect. The average roughness value （Ra） decreased from 2.90 in the CG sample down to about 0.65 μm in fine-grained （FG） sample after FSP. It can be concluded that the FG microstructure in low carbon steels sheets or plates used generally in shipbuilding provides a good balance between strength and formability.

关键词： Friction stir processing Low carbon shipbuilding steel Formability Microstructure Mechanical properties

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Trace Element Composition of Clinopyroxene From Mantlederived Peridotite Xenoliths

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Chinese Science Bulletin 1993年第14期38卷 1186-1189页

作者：陈道公 S.y.o'Reilly W.L.Griffin University of Science and Technology of China Hefei 230026 PRC School of Earth Sciences Macquarie Univeristy NSW 2109 Australia Division of Exploration Geoscience CSIRO North Ryde 2113 Australia

Knowledge of the trace element distributions and concentrations in main mineral phases of mantle-derived rocks is particularly useful for understanding the partial melting, depletion and enrichment processes, and metasomatism in the earth’s mantle. Trace element data on mantle peridotites were usually obtained with large uncertainty by neutron activation analysis in China previously. We have determined trace element concentration of 173 grains of clinopyroxene (cpx) in 50 peridotite xenoliths from different areas in China using the pro-

关键词： trace element clinopyroxene mantle.

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Unusually high corrosion resistance in Mo_(x)CrNiCo medium entropy alloy enhanced by acidity in aqueous solution

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Journal of Materials Science & Technology 2023年第8期139卷 59-68页

作者： S.Shuang G.J.Lyu D.Chung X.Z.Wang X.Gao H.H.Mao W.P.Li Q.F.He B.S.Guo X.y.Zhong y.J.Wang y.yang Department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 101408China State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Unit of Structures Department of Materials Science and EngineeringKTHStockholm SE-10044Sweden Thermo-Calc Software Råsundav.18SolnaSE-16767Sweden Department of Materials Science and Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Department of Advanced Design and System Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongChina

High corrosion resistance of alloys is essential for their structural applications;however,most alloys suffer from degradation of their corrosion resistance with the increasing acidity of their ***,we developed a series of medium-entropy alloys(MEAs)in this work,which ex-hibit high strength,superior fracture toughness and ultra-high corrosion resistance,outperforming the variety of corrosion resistant alloys hitherto *** interestingly,our MEAs exhibit an unusual anti-corrosion behavior and their corrosion resistance increases with acidity in Cl−containing *** extensive thermodynamic calculations,density functional theory(DFT)simulations and experi-ments,we reveal that the unusual anti-corrosion behavior of our MEAs can be attributed to their surface chemical complexity,which facilitates the physio-chemical-absorption of H_(2)o and o_(2)and thus the rapid formation of metastable medium entropy passive films that contain the lowest amount of defects,as compared to the passive films on conventional alloys reported in the literature.

关键词： Corrosion Passivation Alloy design Multi-principal element alloys Medium-entropy alloys

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Determination of Calcium in olivine by Proton Microprobe and Its Implication

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Chinese Science Bulletin 1993年第5期38卷 396-399页

作者：陈道公 S.y.o'Reilly W.L.Griffin University of Science and Technology of China Hefei 230026 PRC School of Earth Science Macquarie University NSW 2109 Australia. Division of Exploration Geosciences CSIRO North Ryde NSW 2113 Australia.

Ca is a minor component of olivine (oliv). Its concentration measured by electron microprobe (EMP) is about 0.1—0.5%, which is close to the minimum detection limit. As Ca distribution between oliv and clinopyroxene (cpx)has the possibility of being used as geothermobarometers, it is very important to measure accurately the Ca content in oliv. Proton-induced X-ray emission (PIXE) technique as a new high energy analysis method shows advantage in high sensitivity and accuracy of microanalyses and begins to be

关键词： calcium olivine proton microprobe mantle.

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A STUDy oN THE BEHAVIoUR oF GALLIUM IN THE IRoNMAKING PRoCESS

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Acta Metallurgica Sinica(English Letters) 2003年第2期16卷 78-83页

作者： L.Savov S.Garonin o.Ivanov y.S.Fusfin D.Janke Institute of Iron and Steel Technology Freiberg University of Mining and TechnologyD-09596 FreibergGermanyInstitute of Iron and Steel TechnologyFreiberg University of Mining and TechnologyD-09596 FreibergGermanyInstitute of Iron and Steel TechnologyFreiberg University of Mining and TechnologyD-09596 FreibergGermanyMoscow State Institute of Steel and Alloys(MISIS)4 Leninsky Prospekt117936 MoscowRussia Manuscript received 9 May 2002Institute of Iron and Steel TechnologyFreiberg University of Mining and TechnologyD-09596 FreibergGermany

Gallium is a valuable rare metal which is mainly being used in the production of GaAs. The demand for gallium is increasing but production is limited since gallium is extracted only as a by-product of bauxite processing. on the other hand coal, ironmaking coke and iron ore gangue contain traces of gallium. However little is known about the behaviour of gallium in ironmaking. The aim of the study is to clarify the distribution of gallium between hot metal, slag and top gas by means of laboratory experiments. It was found that Ga2o3 is not stable in blast furnace slags and that gallium is retained in hot metal. Vacuum distillation experiments with hot metal showed that gallium is not transferred to the gas phase. Data on the input and output of gallium at two industrial blast furnaces, as well as chemical analyses of the gallium content of several cokes are presented, too.

关键词： gallium thermodynamics ironmaking blast furnace coke

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Changes in Philornis infestation behavior threaten Darwin＇s finch survival

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Current Zoology 2014年第4期60卷 542-550页

作者： Sonia KLEINDoRFER Katharina J. PETERS Georgina CUSTANCE Rachael y. DUDANIEC Jody A. o'CoNNoR School of Biological Sciences Flinders University GPO Box 2100 Adelaide 5001 Australia Department of Biology Lund University S61vegatan 37 Lund 22362 Sweden

The conservation behavior framework is useful to identify key linkages between behavior and conservation practice. We apply this framework to a novel host-parasite system on the Galapagos Islands and ask if there have been changes in parasite oviposition behavior and host mortality patterns across the first decade (2004-2013) of its known association. The Dipteran parasitePhilornis downsiwas first discovered in Darwin’s finch nests in 1997 and is the biggest threat to the survival of Galapagos land birds. Host mortality has increased over the past decade. In Dipterans, pupation and pupae size are determined by access to host resources. Here, we test the hypothesis thatP. downsiflies are laying eggs in finch nests earlier in the nestling phase to maximize larval feeding time and therefore chance of pupation success before host death. The results show fewer 1stinstar larvae later in the host nesting cycle in support of earlier egg laying behavior by female flies. Between 2004 and 2013, parasite intensity increased from ~28 to ~48 parasites per nest, host mortality increased from ~50% to ~90%, and host age at death decreased from ~11 to ~5 days. The earlier age at host death was correlated with fewer pupae (from ~50% to ~20%) and smaller pupae size (~10% decrease). Changes in parasite behavior reveal new fitness costs to both the parasite and Darwin’s finches. These findings underscore the need for urgent conservation action to save Darwin’s finches from extinction due to a novel, lethal and introduced parasite [Current Zoology60 (4): 542–550, 2014].

关键词：寄生行为达尔文威胁加拉帕戈斯群岛侵扰产卵行为寄生虫死亡率

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Synthesis,Crystal Structure and Conformational Analysis of (E)-5-Methoxy-2-((4-methoxyphenylimino)methyl)phenol

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Chinese Journal of Structural Chemistry 2010年第3期29卷 359-364页

作者： ■AHN onura ByKGNGR orhana ALBAyRAK i■demb oDABA■o■LU Mustafac Department of Physics Faculty of Arts and SciencesOndokuz Mayis University Department of Science Education Sinop University Chemistry Programme Pamukkale University

The title compound,（E）-5-methoxy-2-（（4-methoxyphenylimino）methyl）phenol（C15H15No3）,crystallizes in monoclinic,space group P21/c with a=9.4361（6）,b=10.6212（5）,c=12.9338（9）,β=93.064（5）o,V=1294.41（14）3,Z=4,Dc=1.320 g/cm3,F（000）=544,Rint=0.116,T=296 K,μ=0.09 mm-1,the final R=0.051 and wR=0.148 for 1836 observed reflections with I2σ（I）.An extensive two-dimensional network of C–H…o hydrogen bonds and π-ring interactions are responsible for the crystal *** hydrogen bonds and C–H…π interactions produce R22（14）,R44（30） and R44（31） *** addition to the molecular geometry from X-ray experiment,the molecular geometry of the title compound in the ground state has been calculated using the semi-empirical（AM1 and PM3） and density functional theory method（DFT）（B3LyP） with 6-31G（d） basis *** determine the conformational flexibility,molecular energy profile of the title compound was obtained by semi-empirical（PM3 and AM1） and DFT/B3LyP calculations with respect to the selected degree of torsional freedom,which varied from –180° to ＋180° in a step of 10°.

关键词： crystal structure Schiff base PM3 AM1 DFT conformational analysis

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Microstructural features of Ti-6Al-4V manufactured via high power laser directed energy deposition under low-cycle fatigue

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Journal of Materials Science & Technology 2021年第24期83卷 18-33页

作者： y.M.Ren X.Lin H.o.yang H.Tan J.Chen Z.y.Jian J.Q.Li W.D.Huang School of Materials and Chemical Engineering Xi’an Technological UniversityXi’an710021China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China

Laser additive manufacturing(LAM)technique has unique advantages in producing geometrically complex metallic ***,the poor low-cycle fatigue property(LCF)of LAM parts restricts its widely ***,the microstructural features of a Ti-6 Al-4 V alloy manufactured via high power laser directed energy deposition subjected to low-cycle fatigue loading were *** fatigue loading,the microstructure of the as-deposited parts was found to exhibit a non-homogeneous distribution of columnar prior-βgrains(200-4000μm)at various scanning velocities(300-1500 mm/min)and relatively coarseα-laths(1.0-4.5μm).Under cyclic loading,fatigue microcracks typically initiated within the alignedαphases in the preferred orientation(45°to the loading direction)at the surface of the fatigue *** Ti-6 Al-4 V exhibited a single straight dislocation character at low strain amplitudes(ocation dipoles or even tangled dislocations at high strain amplitudes(>1.1%).In addition,dislocation substructure features,such as dislocation walls,stacking faults,and dislocation networks,were also *** findings may provide opportunities to understand the fatigue failure mechanism of additive manufactured titanium parts.

关键词： Laser additive manufacturing Directed energy deposition Titanium alloy Low-cycle fatigue Microstructure

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