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A review on treatment of disinfection byproduct precursors by biological activated carbon process

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Chinese Chemical Letters 2022年第10期33卷 4495-4504页

作者： Jie Fu ching-hua huang Chenyuan Dang Qilin wang School of Environmental Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332United States Center for Technology in Water and Wastewater School of Civil and Environmental EngineeringUniversity of Technology SydneySydneyNew South Wales 2007Australia

Disinfection by-products(DBPs)in water systems have attracted increasing attention due to their toxic *** of precursors(mainly natural organic matter(NOM))prior to the disinfection process has been recognized as the ideal strategy to control the DBP ***,biological activated carbon(BAC)process is a highly recommended and prevalent process for treatment of DBP precursors in advanced water *** paper first introduces the fundamental knowledge of BAC process,including the history,basic principles,typical process flow,and basic operational ***,the selection of BAC process for treatment of DBP precursors is explained in detail based on the comparative analysis of dominant water treatment technologies from the aspects of mechanisms for NOM removal as well as the treatability of different groups of DBP ***,a thorough overview is presented to summarize the recent developments and breakthroughs in the removal of DBP precursors using BAC process,and the contents involved include effect of pre-BAC ozonation,removal performance of various DBP precursors,toxicity risk reduction,fractional analysis of NOM,effect of empty bed contact time(EBCT)and engineered ***,some recommendations are made to strengthen current research and address the knowledge gaps,including the issues of microbial mechanisms,toxicity evaluation,degradation kinetics and microbial products.

关键词： Disinfection byproduct precursor Biological activated carbon Formation potential Natural organic matter Empty bed contact time Ozonation

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经典电路网络中奇异束缚态的实验观察

Science Bulletin 2024年第14期69卷 2194-2204页

作者：邹德源陈天孟海瑜 Yee Sin Ang 张向东李庆华 Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Department of Physics National University of SingaporeSingapore 117542Singapore Science Mathematics and Technology ClusterSingapore University of Technology and DesignSingapore 487372Singapore Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China

Exceptional bound(EB)states represent a unique new class of robust bound states protected by the defectiveness of non-Hermitian exceptional *** distinct from the more well-known topological states and non-Hermitian skin states,they were recently discovered as a novel source of negative entanglement entropy in the quantum entanglement ***,EB states have been physically elusive,being originally interpreted as negative probability eigenstates of the propagator of nonHermitian Fermi *** this work,we show that EB states are in fact far more ubiquitous,also arising robustly in broad classes of systems whether classical or *** hinges crucially on a newlydiscovered spectral flow that rigorously justifies the EB nature of small candidate lattice *** a highlight,we present their first experimental realization through an electrical circuit,where they manifest as prominent stable resonant voltage *** work brings a hitherto elusive but fundamentally distinctive quantum phenomenon into the realm of classical metamaterials,and provides a novel pathway for the engineering of robust modes in otherwise sensitive systems..

关键词： Exceptional bound states Classical circuit network Non-Hermitian Robustness Exceptional point

Efficient Contact between H_(2)O and N-Coordinate Ru Nanoparticles in Three-Dimensionally Ordered Macro/Mesoporous Carbon Boosting Alkaline HER

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Chinese Journal of Chemistry 2024年第2期42卷 164-170页

作者： Jiaqing Luo Chunyu Liu Ruolin Zhang Yuanqing Sun hua Xu Qingying Hu Manxue Zhang Jun Li Zhenxing Li Weiyu Song Yuechang Wei Jian Liu State Key Laboratory of Heavy Oil and Bejing Key Lab of Oil&Gas Optical Detection Technology China University of PetroleumBeijing 102249China Laboratory of Heavy Oil at Karamay Ching University of Petroleum-Beijing at KaramayKaramayXinjiang 83400China Basic Research Center for Energy Interdisciplinary College of ScienceChina University of PetroleumBeijing 102249China Petrochemical Research Institute PetroChina Company LimitedBeijing 102206China BeijingNationalLaboratoryfor Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

In this study,a novel approach is proposed to achieve the uniformly dispersed Ru nanoparticles with N coordination loaded on three-dimensionally ordered macro/mesoporous carbon(3DOMMC)through simultaneous pyrolysis of Ru^(3+)and cyanamide on *** an alkaline medium,the synthesized catalysts exhibit exceptional hydrogen evolution reaction(HER)***,Ru-N/3DOMMC demonstrates a significantly low overpotential of 13.8 mV to achieve acrent density of 10 *** exhibits a mass activity 17.5 times higher than that of commercial Pt/*** outstanding performance could be attributed to the ultrahigh Ru dispersion and more efficient contact between active sites and reactant,which derived from the large specific surface area and interconnective three-dimensionally macro/mesopores of 3DOMMC.

关键词： 3DOMMC Hydrogen evolution reaction Electrocatalysis Solid-liquid contact Energy conversion

Topological non-Hermitian skin effect

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Frontiers of physics 2023年第5期18卷 1-45页

作者： Rijia Lin Tommy Tai Linhu Li ching hua Lee Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and Astronomy Sun Yat-Sen University(Zhuhai Campus)Zhuhai 519082China Department of Physics Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Physics National University of SingaporeSingapore117542Singapore

This article reviews recent developments in the non-Hermitian skin effect(NHSE),particularly on its rich interplay with *** review starts off with a pedagogical introduction on the modified bulk-boundary correspondence,the synergy and hybridization of NHSE and band topology in higher dimensions,as well as,the associated topology on the complex energy plane such as spectral winding topology and spectral graph *** which,emerging topics are introduced such as non-Hermitian criticality,dynamical NHSE phenomena,and the manifestation of NHSE beyond the traditional linear non-interacting crystal lattices,particularly its interplay with quantum many-body ***,we survey the recent demonstrations and experimental proposals of NHSE.

关键词： non-Hermitian skin effect topological phases

Enhanced formation of trihalomethane disinfection byproducts from halobenzoquinones under combined UV/chlorine conditions

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Frontiers of Environmental Science & Engineering 2022年第6期16卷 109-119页

作者： He Zhao ching-hua huang Chen Zhong Penghui Du Peizhe Sun Beijing Engineering Research Center of Process Pollution Control Division of Environment Technology and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Civil and Environmental Engineering Georgia Institute of TechnologyAtlantaGA 30332USA State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China School of Environmental Science and Engineering Tianjin UniversityTianjin 300072China

Halobenzoquinones(HBQs)are highly toxic disinfection byproducts(DBPs)and are also precursors of other DBPs such as trihalomethanes(THMs).The formation of THMs from HBQs during chlorine-only and UV/chlorine processes with or without bromide was investigated *** functional theory(DFT)reactivity descriptors were also applied to predict the nucleophilic/electrophilic reactive sites on HBQs and *** results were combined to explain the different behaviors of 2,6-dichloro-1,4-benzoquinone(2,6-DCBQ)and tetrachloro-1,4-benzoquinone(TCBQ)and to propose mechanism for the promoting roles of UV and hydroxylation of HBQs in THMs *** UV/chlorine,UV significantly enhanced THMs formation from 2,6-DCBQ compared to chlorine-only,mainly due to the production of OH-DCBQ^(*).Excited 2,6-DCBQ^(*)by UV benefited nucleophilic hydrolysis to produce OH-DCBQ^(*),which favored electrophilic attack by chlorine,thereby inducing more THMs ***/chlorine modestly promoted THMs formation from TCBQ compared to *** of TCBQ and UV irradiation were both important in promoting THMs formation due to the high electrophilic property of OH-TCBQ and TCBQ^(*).Meanwhile,hydroxylation of HBQs and CHCl3 formation were enhanced at higher *** work suggested that enhanced formation of THMs from HBQs should be considered in the application of combined UV and chlorine processes.

关键词： Halobenzoquinone Trihalomethane Chlorine disinfection UV irradiation Disinfection byproducts Combined UV/chlorine

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非厄米赝能隙

Science Bulletin 2022年第7期67卷 685-690页

作者：李林虎 ching hua Lee Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and Astronomy Sun Yat-sen University(Zhuhai Campus)Zhuhai 519082China Department of Physics National University of SingaporeSingapore 117551Singapore

能隙是表征物态的重要概念之一.其中,能态密度极低但非零的区域被称为赝能隙,其出现与高温超导等现象有着重要的联系.本研究发现对于一些非厄米格点系统,引入开边界条件能够导致赝能隙的产生.这一现象通常在两个或更多不对称的非厄米泵... 详细信息

能隙是表征物态的重要概念之一.其中,能态密度极低但非零的区域被称为赝能隙,其出现与高温超导等现象有着重要的联系.本研究发现对于一些非厄米格点系统,引入开边界条件能够导致赝能隙的产生.这一现象通常在两个或更多不对称的非厄米泵浦通道相互影响时出现,并且没有厄米对应.非厄米赝能隙的出现同时也伴随着一些其他新奇的物理现象.与普通拓扑能隙类似,非厄米赝能隙中也能出现受对称性保护的隙间态,但这些隙间态具有扩展的空间分布,而不是局域在系统边缘,且对破坏对称性的扰动具有很高的敏感性.在传统的拓扑相变点处,非厄米赝能隙中同样可以存在与拓扑态类似的局域边界态,但并不直接对应相应赝能带的拓扑不变量:这些赝能带可能具有分数的拓扑数,甚至不具有良好定义的陈数.非厄米赝能隙的概念挑战了传统拓扑对应以及能带的概念,有望对分数陈绝缘体等多体现象产生重要的影响.

关键词：物理现象能态密度赝能隙高温超导拓扑不变量对称性

Filling up complex spectral regions through non-Hermitian disordered chains

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Chinese Physics B 2022年第5期31卷 1-9页

作者： Hui Jiang ching hua Lee Department of Physics National University of SingaporeSingapore 117551Republic of Singapore

Eigenspectra that fill regions in the complex plane have been intriguing to many,inspiring research from random matrix theory to esoteric semi-infinite bounded non-Hermitian *** this work,we propose a simple and robust ansatz for constructing models whose eigenspectra fill up generic prescribed *** approach utilizes specially designed non-Hermitian random couplings that allow the co-existence of eigenstates with a continuum of localization lengths,mathematically emulating the effects of semi-infinite *** some of these couplings are necessarily long-ranged,they are still far more local than what is possible with known random matrix *** ansatz can be feasibly implemented in physical platforms such as classical and quantum circuits,and harbors very high tolerance to imperfections due to its stochastic nature.

关键词： non-Hermitian skin effect disordered chain disorder localization non-Hermitian spectra

Micromechanical analysis of the behavior of stiffclay

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Acta Mechanica Sinica 2011年第6期27卷 1013-1022页

作者： Zhen-Yu Yin ching S. Chang Pierre-Yves Hicher Jian-hua wang Department of Civil Engineering Shanghai Jiao Tong University 200240 Shanghai China Department of Civil and Environmental Engineering University of Massachusetts Amherst MA 01002 USA Research Institute in Civil and Mechanical Engineering UMR CNRS 6183 Ecole Centrale de Nantes BP 92101 44321 Nantes France

Cementations formed in geological timescale are observed in various stiff clays.A micromechanical stress strain model is developed for modeling the effect of cementation on the deformation behavior of stiff *** proposed approach considers explicitly cementations at intercluster contacts,which is different from conventional *** concept of inter-cluster bonding is introduced to account for an additional cohesion in shear sliding and a higher yield stress in normal compression.A damage law for inter-cluster bonding is proposed at cluster contacts for the debonding process during mechanical *** model is used to simulate numerous stress-path tests on Vallericca stiff *** applicability of the present model is evaluated through comparisons between the predicted and the measured *** order to explain the stress-induced anisotropy arising from externally applied load,the evolution of local stresses and local strains at inter-cluster planes are discussed.

关键词： Stiff clay Destructuration Micromechanics Plasticity Induced anisotropy

A deformability-based biochip for precise label-free stratification of metastatic subtypes using deep learning

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Microsystems & Nanoengineering 2023年第5期9卷 161-176页

作者： Haojun hua Shangjie Zou Zhiqiang Ma wang Guo ching Yin Fong Bee Luan Khoo City University of Hong Kong 83 Tat Chee AvenueKowloonHong Kong 999077China Hong Kong Center for Cerebro-Cardiovascular Health Engineering(COCHE) Hong Kong 999077China City University of Hong Kong Futian-Shenzhen Research Institute Shenzhen 518057China

Cellular deformability is a promising biomarker for evaluating the physiological state of cells in medical *** has emerged as a powerful technique for measuring cellular ***,existing microfluidic-based assays for measuring cellular deformability rely heavily on image analysis,which can limit their scalability for high-throughput ***,we develop a parallel constriction-based microfluidic flow cytometry device and an integrated computational framework(ATMQcD).The ATMQcD framework includes automatic training set generation,multiple object tracking,segmentation,and cellular deformability *** system was validated using cancer cell lines of varying metastatic potential,achieving a classification accuracy of 92.4%for invasiveness assessment and stratifying cancer cells before and after hypoxia *** ATMQcD system also demonstrated excellent performance in distinguishing cancer cells from leukocytes(accuracy=89.5%).We developed a mechanical model based on power-law rheology to quantify stiffness,which was fitted with measured data *** model evaluated metastatic potentials for multiple cancer types and mixed cell populations,even under realworld clinical *** study presents a highly robust and transferable computational framework for multiobject tracking and deformation measurement tasks in *** believe that this platform has the potential to pave the way for high-throughput analysis in clinical applications,providing a powerful tool for evaluating cellular deformability and assessing the physiological state of cells.

关键词： deformability metastatic precise