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Removal of Cu(II), Pb(II) and Zn(II) Ions from Aqueous Solutions Using Selected Agricultural Wastes: Adsorption and Characterisation Studies

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Journal of Environmental Protection 2014年第4期5卷 289-300页

作者： Siti Najiah Mohd Yusoff Azlan Kamari Wiwid Pranata Putra che fauziah ishak Azmi Mohamed Norhayati Hashim Illyas Md Isa 1Department of chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia 2Nanotechnology Research Centre Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of Land Management Faculty of Agriculture Universiti Putra Malaysia Serdang Selangor Malaysia

The feasibility of durian tree sawdust (DTS), coconut coir (CC) and oil palm empty fruit bunch (EFB) as low-cost biosorbents for the removal of Cu(II), Pb(II) and Zn(II) ions from aqueous solutions was investigated. The effects of solution pH and initial metal concentration on adsorption capacity were examined in batch experiments. The affinity and the adsorption capacity of DTS, CC and EFB were evaluated. The adsorption behaviour of Cu(II), Pb(II) and Zn(II) ions onto DTS, CC and EFB was described using Freundlich and Langmuir isotherm models. The separation factor (RL) analysis suggests that the removal of metal ions onto three agricultural wastes studied was favourable. The maximum adsorption capacities (Q) estimated from the Langmuir isotherm model for Cu(II), Pb(II) and Zn(II) were 18.42, 20.37 and 22.78 mg/g for DTS, 18.38, 37.04 and 24.39 mg/g for CC, and 26.95, 37.59 and 21.19 mg/g for EFB, respectively. The characterisation studies were carried out using Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectrometer (EDX) and Fourier Transform Infrared Spectrometer (FTIR). The surface morphology of the biosorbents changed significantly following interaction with metal ions. The primary adsorption mechanism was complexation between metal ions and binding sites of biosorbents. Both hydroxyl and amine groups are the main binding sites in DTS, CC and EFB.

关键词： Adsorption Characterisation Metals Durian Tree Sawdust Coconut Coir Oil Palm Empty Fruit Bunch

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Biosorption of Cu(II), Pb(II) and Zn(II) Ions from Aqueous Solutions Using Selected Waste Materials: Adsorption and Characterisation Studies

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Journal of Encapsulation and Adsorption Sciences 2014年第1期4卷 25-35页

作者： Wiwid Pranata Putra Azlan Kamari Siti Najiah Mohd Yusoff che fauziah ishak Azmi Mohamed Norhayati Hashim Illyas Md Isa Department of chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of chemistry Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Nanotechnology Research Centre Faculty of Science and Mathematics Universiti Pendidikan Sultan Idris Tg. Malim Perak Malaysia Department of Land Management Faculty of Agriculture Universiti Putra Malaysia Serdang Selangor Malaysia

The efficacy of coconut tree sawdust (CTS), eggshell (ES) and sugarcane bagasse (SB) as alternative low-cost biosorbents for the removal of Cu(II), Pb(II) and Zn(II) ions from aqueous solutions was investigated. Batch adsorption studies were carried out to evaluate the effects of solution pH and initial metal concentration on adsorption capacity. The optimum biosorption condition was found at pH 6.0, 0.1 g biomass dosage and at 90 min equilibrium time. The adsorption data were fitted to the Freundlich and Langmuir isotherm models. The adsorption capacity and affinity of CTS, ES and SB were evaluated. The Freundlich constant (n) and separation factor (RL) values suggest that the metal ions were favourably adsorbed onto biosorbents. The maximum adsorption capacities (Q) estimated from the Langmuir isotherm model for Cu(II), Pb(II) and Zn(II) were 3.89, 25.00 and 23.81 mg/g for CTS, 34.48, 90.90 and 35.71 mg/g for ES, and 3.65, 21.28 and 40.00 mg/g for SB, respectively. The characterisation studies were performed using Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectrometer (EDX) and Fourier Transform Infrared Spectrometer (FTIR). Interaction with metal ions led to the formation of discrete aggregates on the biosorbents surface. The metal ions bound to the active sites of the biosorbents through either electrostatic attraction or complexation mechanism.

关键词： Adsorption Characterisation Metal Ions Coconut Tree Sawdust Eggshell Sugarcane Bagasse

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“Zero‑Strain” NiNb_(2)O_(6) Fibers for All‑Climate Lithium Storage

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Nano-Micro Letters 2025年第1期17卷 348-360页

作者： Yan Zhao Qiang Yuan Liting Yang Guisheng Liang Yifeng cheng Limin Wu Chunfu Lin Renchao che College of Physics Donghua UniversityShanghai 201620People’s Republic of China School of Materials Science and Engineering Institute of Materials for Energy and EnvironmentQingdao UniversityQingdao 266071People’s Republic of China Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China Inner Mongolia University Hohhot 010021People’s Republic of China

Niobates are promising all-climate Li^(+)-storage anode material due to their fast charge transport,large specific capacities,and resistance to electrolyte ***,their moderate unit-cellvolume expansion(generally 5%–10%)during Li^(+)storage causes unsatisfactory long-term ***,“zero-strain”NiNb_(2)O_(6) fibers are explored as a new anode material with comprehensively good electrochemical *** Li^(+)storage,the expansion of electrochemical inactive NiO_(6) octahedra almost fully offsets the shrinkage of active NbO_(6) octahedra through reversible O *** superior volume-accommodation capability of the NiO_(6) layers guarantees the“zero-strain”behavior of NiNb_(2)O_(6) in a broad temperature range(0.53%//0.51%//0.74%at 25//−10//60℃),leading to the excellent cyclability of the NiNb_(2)O_(6) fibers(92.8%//99.2%//91.1%capacity retention after 1000//2000//1000 cycles at 10C and 25//−10//60℃).This NiNb_(2)O_(6) material further exhibits a large reversible capacity(300//184//318 mAh g−1 at 0.1C and 25//−10//60℃)and outstanding rate performance(10 to 0.5C capacity percentage of 64.3%//50.0%//65.4%at 25//−10//60℃).Therefore,the NiNb_(2)O_(6) fibers are especially suitable for large-capacity,fast-charging,long-life,and all-climate lithium-ion batteries.

关键词： NiNb_(2)O_(6)porous fiber “Zero-strain”mechanism Electrochemical property Harsh-temperature operation Operando characterization

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Spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for Ultra‑Thin Electromagnetic Wave Absorber

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Nano-Micro Letters 2025年第1期17卷 424-438页

作者： Honghan Wang Xinyu Xiao Shangru Zhai Chuang Xue Guangping Zheng Deqing Zhang Renchao che Junye cheng Liaoning Key Lab of Lignocellulose chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefinerySchool of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034People’s Republic of China School of Life Science and Biotechnology Dalian University of TechnologyDalian 116024People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Department of Materials Science Shenzhen MSU-BIT UniversityShenzhen 517182People’s Republic of China

The synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering of conductive/dielectric *** migration modes within HEAs as manipulated by the electronegativity,valence electron configurations and molar proportions of constituent elements determine the steady state and efficiency of equivalent ***,enlightened by skin-like effect,a reformative carbothermal shock method using carbonized cellulose paper(CCP)as carbon supporter is used to preserve the oxygencontaining functional groups(O·)of carbonized cellulose fibers(CCF).Nucleation of HEAs and construction of emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked to carbon metabolism induced by O·.Meanwhile,the electron migration mode of switchable electronrich sites promotes the orientation polarization of anisotropic equivalent *** virtue of the reinforcement strategy,CCP/HEAs composite prepared by 35%molar ratio of Mn element(CCP/HEAs-Mn_(2.15))achieves efficient electromagnetic wave(EMW)absorption of−51.35 dB at an ultra-thin thickness of 1.03 *** mechanisms of the resulting dielectric properties of HEAs-based EMW absorbing materials are elucidated by combining theoretical calculations with experimental characterizations,which provide theoretical bases and feasible strategies for the simulation and practical application of electromagnetic functional devices(e.g.,ultra-wideband bandpass filter).

关键词： High-entropy alloys Carbothermal shock Switchable electron migration modes Emblematic shell-core heterointerfaces Ultra-thin thickness

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Designing Electronic Structures of Multiscale Helical Converters for Tailored Ultrabroad Electromagnetic Absorption

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Nano-Micro Letters 2025年第1期17卷 439-455页

作者： Zhaobo Feng Chongbo Liu Xin Li Guangsheng Luo Naixin Zhai Ruizhe Hu Jing Lin Jinbin Peng Yuhui Peng Renchao che Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle School of Environmental and Chemical EngineeringNanchang Hangkong UniversityNanchang 330063People’s Republic of China School of Physics and Materials Nanchang UniversityNanchang 330031People’s Republic of China Key Laboratory of Nondestructive Testing Ministry of EducationNanchang Hangkong UniversityNanchang 330063People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering and TechnologyFudan UniversityShanghai 200438People’s Republic of China

Atomic-scale doping strategies and structure design play pivotal roles in tailoring the electronic structure and physicochemical property of electromagnetic wave absorption(EMWA)***,the relationship between configuration and electromagnetic(EM)loss mechanism has remained ***,drawing inspiration from the DNA transcription process,we report the successful synthesis of novel in situ Mn/N co-doped helical carbon nanotubes with ultrabroad EMWA *** calculation and EM simulation confirm that the orbital coupling and spin polarization of the Mn–N4–C configuration,along with cross polarization generated by the helical structure,endow the helical converters with enhanced EM *** a result,HMC-8 demonstrates outstanding EMWA performance,achieving a minimum reflection loss of−63.13 dB at an ultralow thickness of 1.29 *** precise tuning of the graphite domain size,HMC-7 achieves an effective absorption bandwidth(EAB)of 6.08 GHz at 2.02 mm ***,constructing macroscale gradient metamaterials enables an ultrabroadband EAB of 12.16 GHz at a thickness of only 5.00 mm,with the maximum radar cross section reduction value reaching 36.4 dB *** innovative approach not only advances the understanding of metal–nonmetal co-doping but also realizes broadband EMWA,thus contributing to the development of EMWA mechanisms and applications.

关键词： Metal-nonmetal co-doping 3d-2p orbital coupling Spin polarization Helical structure Broadband EM wave absorption

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Scattered Data Interpolation Using Cubic Trigonometric Bézier

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Computers, Materials & Continua 2021年第10期69卷 221-236页

作者： ishak Hashim Nur Nabilah che Draman Samsul Ariffin Abdul Karim Wee Ping Yeo Dumitru Baleanu Department of Mathematical Sciences Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaUKMBangi43600Selangor Darul EhsanMalaysia Department of Fundamental and Applied Sciences Universiti Teknologi PETRONASSeri Iskandar32610Perak Darul RidzuanMalaysia Department of Fundamental and Applied Sciences and Centre for Systems Engineering(CSE) Institute of Autonoumous System Universiti Teknologi PETRONASSeri Iskandar32610Perak Darul RidzuanMalaysia Faculty of Science Universiti Brunei DarussalamBandar Seri BegawanBE1410Brunei Darussalam Department of Mathematics Cankaya UniversityAnkaraTurkey Institute of Space Sciences Magurele-BucharestRomania Department of Medical Research China Medical University HospitalChina Medical UniversityTaichungTaiwan

This paper discusses scattered data interpolation using cubic trigonometric Bézier triangular patches with C1 continuity *** derive the C1 condition on each adjacent *** each triangular patch,we employ convex combination method between three local *** final interpolant with the rational corrected scheme is suitable for regular and irregular scattered data *** tested the proposed scheme with 36,65,and 100 data points for some well-known test *** scheme is also applied to interpolate the data for the electric *** compared the performance between our proposed method and existing scattered data interpolation schemes such as Powell–Sabin(PS)and Clough–Tocher(CT)by measuring the maximum error,root mean square error(RMSE)and coefficient of determination(R^(2)).From the results obtained,our proposed method is competent with cubic Bézier,cubic Ball,PS and CT triangles splitting schemes to interpolate scattered data *** is very significant since PS and CT requires that each triangle be splitting into several micro triangles.

关键词： Cubic trigonometric Bézier triangular patches C1sufficient condition scattered data interpolation

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空间异质性何以影响产业产出?——文献回顾与研究展望

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Journal of Resources and Ecology 2023年第6期14卷 1217-1226页

作者：谢爱良 fauziah che LEH Norimah RAMBELI 苏丹依德里斯教育大学人文科学学院地理与环境系霹雳州丹戎马林市35900马来西亚临沂大学历史文化学院山东临沂276005 苏丹依德里斯教育大学管理与经济学院经济学系霹雳州丹戎马林市35900马来西亚

空间异质性对产业产出的影响是一个新兴的经济地理学重要议题,已积累了相当数量的研究文献,但学界对此议题缺乏系统全面的回顾和反思。通过挖掘相关经典文献对空间异质性何以影响产业产出进行文献反思与研究展望。本研究首先梳理空间异... 详细信息

空间异质性对产业产出的影响是一个新兴的经济地理学重要议题,已积累了相当数量的研究文献,但学界对此议题缺乏系统全面的回顾和反思。通过挖掘相关经典文献对空间异质性何以影响产业产出进行文献反思与研究展望。本研究首先梳理空间异质性的内涵。空间异质性是与空间依赖性既相对应又相关联的两个概念。理论界普遍承认产业产出过程中存在空间异质性。然后从空间异质性影响产业产出的逻辑基础、关系协同、度量等方面进行文献的梳理分析与总结。分析空间异质性对产业产出的影响不能忽视空间维度,还要重视企业个体的异质性。产业产出分析需要基于空间异质性与空间依赖性的关系认同展开。对于空间异质性对产业产出的影响以及观测对象的相异程度,是可以通过计量的方法来测定的。度量空间异质性影响产业产出的常见指标主要有半变异函数、空间扩展模型和地理加权回归模型。最后指出未来研究的若干方向,以期为今后空间异质性影响产业产出的理论研究和产业实践提供有益思路。

关键词：空间异质性产业产出文献综述

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压应力激活SOST/Wnt/β-catenin 通路诱导软骨终板细胞退变

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中国组织工程研究 2025年第5期29卷 951-957页

作者：项攀车艳军罗宗平苏州大学附属第一医院骨科研究所江苏省苏州市215006 南京医科大学附属苏州医院骨科与运动医学中心江苏省苏州市215000

背景:在许多可以导致椎间盘退变的因素中(衰老、营养匮乏、机械因素等),力学负荷被认为是极其重要的因素,但其机制尚不清楚。目的:探讨硬骨素和Wnt/β-catenin信号通路在压应力诱导终板软骨退变中的作用。方法:提取4周龄雄性SD大鼠软骨... 详细信息

背景:在许多可以导致椎间盘退变的因素中(衰老、营养匮乏、机械因素等),力学负荷被认为是极其重要的因素,但其机制尚不清楚。目的:探讨硬骨素和Wnt/β-catenin信号通路在压应力诱导终板软骨退变中的作用。方法:提取4周龄雄性SD大鼠软骨终板细胞,体外利用力学加载仪器对终板软骨细胞施加压应力,于压缩细胞1,3,5,7 d,采用CCK-8法测定细胞活力;Western blot、RT-qPCR及细胞免疫荧光等检查终板软骨细胞内软骨标记物(聚集蛋白聚糖、Ⅱ型胶原)、钙化相关因子(Runx2、骨钙素)、细胞外基质降解酶及信号通路基因(硬骨素、β-catenin)等表达。结果与结论:①压应力作用下,终板软骨细胞活力会随着压应力时间、强度增加而降低;②终板软骨细胞的软骨标记物(聚集蛋白聚糖、Ⅱ型胶原)表达下降,而钙化相关因子(Runx2、骨钙素)表达上升;③压应力能促进终板软骨细胞的细胞外基质降解,基质金属蛋白酶3、基质金属蛋白酶13表达量增加;④细胞内Wnt/β-catenin信号通路表达出现异常,其特异性抑制因子硬骨素伴随着β-catenin的异常积累而表达下降。结果说明:在压应力作用下,终板软骨细胞内硬骨素的表达下降,导致Wnt/β-catenin信号通路激活,促进软骨终板的钙化、退变与细胞外基质的降解,进而促进椎间盘退变。

关键词：软骨终板软骨细胞 SOST Wnt/β-catenin 压应力椎间盘退变

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Combating with extremely noisy samples in weakly supervised slot filling for automatic diagnosis

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Frontiers of Computer Science 2023年第5期17卷 67-73页

作者： Xiaoming SHI Wanxiang che School of Computer Science and Technology Harbin Institute of TechnologyHarbin 150001China

Slot filling,to extract entities for specific types of information(slot),is a vitally important modular of dialogue systems for automatic *** responses can be regarded as the weak supervision of patient *** this way,a large amount of weakly labeled data can be obtained from unlabeled diagnosis dialogue,alleviating the problem of costly and time-consuming data ***,weakly labeled data suffers from extremely noisy *** alleviate the problem,we propose a simple and effective Co-WeakTeaching *** method trains two slot filling models *** two models learn from two different weakly labeled data,ensuring learning from two ***,one model utilizes selected weakly labeled data generated by the other,*** model,obtained by the Co-WeakTeaching on weakly labeled data,can be directly tested on testing data or sequentially fine-tuned on a small amount of human-annotated *** results on these two settings illustrate the effectiveness of the method with an increase of 8.03%and 14.74%in micro and macro f1 scores,respectively.

关键词： dialogue system slot filling co-teaching

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Searching for QCD critical point with light nuclei

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Nuclear Science and Techniques 2023年第5期34卷 192-195页

作者： che Ming Ko Cyclotron Institute and Department of Physics and Astronomy Texas A&M UniversityCollege StationTexas 77843‑3366USA

Density fluctuations and correlations due to a first-order quark-gluon plasma to hadronic matter phase transition and its critical end point,if they remain present after the hadronic evolution in a heavy ion collisions,can lead to an enhanced production of light nuclei in these *** would then result in a non-monotonic collision energy dependence of the yield ratio NtNp∕Nd2of proton number Np,deuteron number Nd,and triton number *** of this yield ratio as a function of collision energy thus provides the possibility to probe the equation of state of strong-interaction matter and its phase diagram.

关键词： critical collision light

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