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| 1 | Targeted Fully Homomorphic Encryption Based on a Double Decryption Algorithm for Polynomials显示文摘Several public-key encryption schemes used to solve the problem of ciphertext data processing on the fly are discussed.A new targeted fully homomorphic encryption scheme based on the discrete logarithm problem is presented.Public-key encryption cryptosystems are classified to examine homomorphic encryption.Without employing techniques proposed by Gentry such as somewhat homomorphic and bootstrapping techniques,or relinearization technique proposed by Brakerski et al.,a new method called'Double Decryption Algorithm'is employed in our cryptography to satisfy a fully or targeted fully homomorphic property.Inspired by ElGamal and BGN cryptography,we obtain the desired fully homomorphic property by selecting a new group and adding an extra component to the ciphertext.Proof of semantic security is also demonstrated. | Yatao Yang Shuang Zhang Junming Yang Jia Li Zichen Li | 2014 | Tsinghua Science and Technology2014，19，5： | 6 |
| 2 | Molecular mechanism mediating enteric bacterial translocation after severe burn:the role of cystic fibrosis transmembrane conductance regulator显示文摘Background:Gut ischemia and hypoxia post severe burn leads to breakdown of intestinal epithelial barrier and enteric bacterial translocation(EBT),resulting in serious complications,such as systemic inflammatory response syndrome,sepsis and multiple organ failure.Cystic fibrosis transmembrane conductance regulator(CFTR)is known to be downregulated by hypoxia and modulate junctional complexes,which are crucial structures maintaining the intestinal barrier.This study aimed to investigate whether CFTR plays a role in both regulating the intestinal barrier and mediating EBT post severe burn,as well as the signaling pathways involved in these processes.Methods:An in vitro Caco-2 cell model subjected to hypoxic injury and an in vivo mouse model with a 30%total body surface area full-thickness dermal burn were established.DF 508 mice(mice with F508del CFTR gene mutation)were used as an in vivo model to further demonstrate the role of CFTR in maintaining normal intestinal barrier function.QRT-PCR,western blot,ELISA,TER assay and immunofluorescence staining were used to detect the expression and localization of CFTR and tight junction proteins,as well as the function of tight junctions.Results:Our data indicated that,in Caco-2 cells,the hypoxia condition significantly reduced CFTR expression;activated extracellular signal-regulated kinase and nuclear factor-κB signaling;elevated secretion of inflammatory factors(tumor necrosis factor-α,interleukin-1βand interleukin-8);downregulated zonula occludens-1,occludin and E-cadherin expression;decreased transepithelial electrical resistance values;and led to a cellular mislocation of ZO-1.More importantly,knockdown of CFTR caused similar alterations.The upregulation of inflammatory factors and downregulation of tight junction proteins(ZO-1 and occludin)induced by knockdown of CFTR could be reversed by specific extracellular signal-regulated kinase or nuclear factor-κB inhibition.In support of the in vitro data,exuberant secretion of pro-inflammatory mediators and EBT was observed in the intestine of severely burnt mice in vivo.EBT occurred in DF508 mice(mice with the F508del CFTR gene mutation),accompanied by augmented tumor necrosis factor-α,interleukin-1βand interleukin-8 levels in the ileum compared to wildtype mice.In addition,vitamin D3 was shown to protect the intestinal epithelial barrier from hypoxic injury.Conclusions:Collectively,the present study illustrated that CFTR and downstream signaling were critical in modulating the intestinal epithelial junction and EBT post severe burn. | Xinzhu Liu Yu Chen Bo You Yuan Peng Yajie Chen Zichen Yang Yixin Zhang Jing Chen | 2021 | Burns & Trauma2021，9，1： | 4 |
| 3 | A Novel Direct Anonymous Attestation Protocol Based on Zero Knowledge Proof for Different Trusted Domains显示文摘In order to solve the issue that existing direct anonymous attestation (DAA) scheme can not operate effectively in different domains,based on the original DAA scheme,a novel direct anonymous attestation protocol used in multi domains environment is proposed and designed,in which,the certificate issuer located in outside of domain can be considered as a proxy server to issue the DAA certificate for valid member nodes directly.Our designed mechanism accords with present trusted computing group (TCG) international specification,and can solve the problems of practical authentication and privacy information protection between different trusted domains efficiently.Compared with present DAA scheme,in our protocol,the anonymity,unforgeability can be guaranteed,and the replay-attack also can be avoided.It has important referenced and practical application value in trusted computing field. | YANG Yatao CAO Lulin LI Zichen | 2010 | China Communications2010，7，4： | 3 |
| 4 | High Quality Data Hiding in Halftone Image Based on Block Conjugate显示文摘This paper proposes a High quality data hiding in halftone image based on block conjugate(HQDHBC). We construct Least mean square filters(LMSF),and using LMSFs to evaluate the quality of halftone images. This paper proposes block conjugate property, and this property can be applied to hide a secret pattern.Therefore a data hiding method based on block conjugate can be proposed, and in this method two images should be divided into multiple blocks of M × N pixels, and in the corresponding block if the first M × N-1 pixels are conjugate or identical, the last pixel can implement normal halftone method instead of date hiding methods. Experimental results show that the proposed HQDHBC can be applied in gray-scale and color error diffused halftone images, and through implementing this method, not only the quality of halftone images can be improved, but also the Correct decoding rate(CDR) of revealed pattern can be guaranteed. | DING Haiyang LI Zichen YANG Yixian YOU Fucheng LIU Fuping | 2018 | Chinese Journal of Electronics2018，27，1： | 3 |
| 5 | Effect of sodium alginate on phosphorus recovery by vivianite precipitation显示文摘There are good prospects for phosphorus recovery from excess sludge by vivianite crystallization while a large number of extracellular polymeric substances in sludge will have impact on vivianite precipitation.In this study,as a representative of extracellular polymeric substance,the effect of sodium alginate(SA)on phosphorus recovery by vivianite precipitation under different initial SA concentrations(0–800 mg/L),p H values(6.5–9.0)and Fe/P molar ratios(1:1–2.4:1)was investigated using synthetic wastewater.The results showed that SA in low concentrations(≤400 mg/L)had little inhibitory effect on the phosphorus recovery rate.However,when the concentration of SA was larger than 400 mg/L,the phosphorus recovery rate decreased significantly with increasing SA concentrations.The inhibition rate of 800 mg/L SA was about 3 times as large as that of 400 mg/L SA.It was worth noting that the inhibitory effect of SA on vivianite precipitation decreased with increasing initial p H and Fe/P molar ratios.Additionally,SA has no obvious influence on the composition of products,but the morphology of harvested crystals was transformed from branches to plates or rods in uneven sizes. | Cong Zhang Dexiu Hu Ruijie Yang Zichen Liu | 2020 | Journal of Environmental Sciences2020，32，7： | 2 |
| 6 | Aero-optical effects simulation technique for starlight transmission in boundary layer under high-speed conditions显示文摘Aero-optical effects for starlight transmission in the high-speed flow field will reduce the accuracy of the star sensor on an aircraft.Numerical simulations for aero-optical effects usually require plenty of calculations,which cause difficulties when designing a celestial navigation system for a high-speed aircraft.In this study,an Aero-Optical Simulator For Starlight Transmission(AOSST)in the boundary layer is developed.It effectively reduces the computational burden compared to that of the widely used CFD simulation,and it achieves satisfactory accuracy.In this simulator,gas ellipsoids satisfying certain design rules are used to simulate coherent density structures in boundary layers.Design rules for the gas ellipsoids are found from published experimental and high-fidelity CFD simulation results.The generated wavefront distortion by AOSST is anchored with the scale law for aero-optical distortion in the boundary layer by determining some control parameters,which enables the simulator to output reliable results over a wide range of flight states.Four numerical examples are provided to verify the performance of AOSST.The results demonstrate that AOSST is able to simulate the directional dependence of aero-optical distortions in boundary layers,the variation trend of distorted wavefront shapes with Reynolds number,and the grayscale distribution on the disturbed star map. | Bo YANG Zichen FAN He YU | 2020 | Chinese Journal of Aeronautics2020，33，7： | 1 |
| 7 | Pressureless two-step sintering of ultrafine-grained refractory metals:Tungsten-rhenium and molybdenum显示文摘The challenge of sintering ultrafine-grained refractory metals and alloys to full density is hereby addressed by pressureless two-step sintering in tungsten-rhenium alloy and pure molybdenum. Using properly processed nano powders(~50 nm average particle size), we are able to sinter W-10Re alloy to 98.4% density below 1200 ℃ while maintaining a fine grain size of 260 nm, and sinter molybdenum to 98.3% density below 1120 ℃ while maintaining a fine grain size of 290 nm. Compared to normal sintering,two-step sintering offers record-fine grain sizes and better microstructural uniformity, which translates to better mechanical properties with higher hardness(6.3 GPa for tungsten-rhenium and 4.0 GPa for molybdenum, both being the highest in all pressurelessly sintered samples of the respective material system)and larger Weibull modulus. Together with our previous demonstration in tungsten, we believe that twostep sintering is a general effective method to produce high-quality fine-grained refractory metals and alloys, and the lessons learned here are transferable to other materials for powder metallurgy. | Zhongyou Que Zichen Wei Xingyu Li Lin Zhang Yanhao Dong Mingli Qin Junjun Yang Xuanhui Qu Ju Li | 2022 | Journal of Materials Science & Technology2022，，31： | 1 |
| 8 | Disease resistance conferred by components of essential chrysanthemum oil and the epigenetic regulation of OsTPS1显示文摘The sesquiterpene alpha-bisabolol is the predominant active ingredient in essential oils that are highly valued in the cosmetics industry due to its wound healing,anti-inflammatory,and skin-soothing properties.Alpha-bisabolol was thought to be restricted to Compositae plants.Here we reveal that alpha-bisabolol is also synthesized in rice,a non-Compositae plant,where it acts as a novel sesquiterpene phytoalexin.Overexpressing the gene responsible for the biosynthesis of alpha-bisabolol,Os TPS1,conferred bacterial blight resistance in rice.Phylogenomic analyses revealed that alpha-bisabolol-synthesizing enzymes in rice and Compositae evolved independently.Further experiments demonstrated that the natural variation in the disease resistance level was associated with differential transcription of Os TPS1 due to polymorphisms in its promoter.We demonstrated that Os TPS1 was regulated at the epigenetic level by JMJ705 through the methyl jasmonate pathway.These data reveal the cross-family accumulation and regulatory mechanisms of alpha-bisabolol production. | Chuansong Zhan Long Lei Hao Guo Shen Zhou Congping Xu Zixin Liu Zichen Wu Yuan Deng Yuanyuan Miao Yu Han Meng Zhang Hua Li Sishu Huang Chenkun Yang Feng Zhang Yufei Li Ling Liu Xianqing Liu Hafiz Muhammad Khalid Abbas Alisdair R.Fernie Meng Yuan Jie Luo | 2023 | Science China(Life Sciences)2023，66，5： | 1 |
| 9 | APPLICATION OF FEA TO THE COLLOCATION OF ACTUATOR/SENSOR IN THE INTELLIGENT STRUCTURES显示文摘The piezothermoelectric actuator/sensor collocation for advanced intelligent structure is studied. The quasi-static equations of piezothermoelasticity are used to analyze the coupling effects between the displacement, temperature and electric fields of piezothermoelasticity continua and the governing equations for piezothermoelasticity continua are derived to discuss the effects of coupling factors on the control/sensing performance in intelligent structure. Based on those analyses, a finite element analysis model of distributed piezothertnoelectric continua is developed later. The thermal stress and deformation of a beam are calculated by FEA method so as to determine the optimal actuator/sensor placement. Based on the results of the optimal analysis procedure of actuator/sensor placement, some conclusions of actuator/sensor placement are obtained. Thus, the optimal actuator/sensor placement for piezothermoelectric intelligent structure can be found from the actuator/sensor placements available so that intelligent system will have the best controllability and observability. | Du Sheliang, Lin Zhongqin (Institute of Mechanical Engineering ,Shanghai Jiaotong University) Yang Keji,Fu Jianzhong,Chen Zichen (Zhejiang University) | 2001 | Chinese Journal of Mechanical Engineering2001，14，3： | 1 |
| 10 | CENP-A的Ser68位动态磷酸化调控它在着丝粒区域的细胞周期依赖性装配显示文摘细胞出版社《发育细胞》创刊于2001年,本刊致力于搭建细胞生物学与发育生物学两大学科之间的桥梁。受过专业博士训l练的科学编辑与作者、审稿人、编委会成员共同合作,及时发布横跨两个领域令人振奋的研究成果,强调两个领域之间共同面临的问题以及相互之间的关系。该杂志2015年公布的影响因子为9.708。 | Zhouliang Yu Xiang Zhou Wenjing Wang Wenqiang Deng Junnan Fang Hao Hu Zichen Wang Shangze Li Lei Cui Jing Shen Linhui Zhai Shengyi Peng Jiemin Wong Shuo Dong Zengqiang Yuan Guangshuo Ou Xiaodong Zhang Ping Xu Jizhong Lou Na Yang Ping Chen Rui-Ming Xu 李国红 | 2016 | 科学新闻2016，0，1： | 1 |
| 11 | Engineering Sodium Metal Anode with Sodiophilic Bismuthide Penetration for Dendrite-Free and High-Rate Sodium-Ion Battery显示文摘Sodium(Na)metal batteries with a high volumetric energy density that can be operated at high rates are highly desirable.However,an uneven Na-ion migration in bulk Na anodes leads to localized deposition/dissolution of sodium during high-rate plating/stripping behaviors,followed by severe dendrite growth and loose stacking.Herein,we engineer the Na hybrid anode with sodiophilic Na_(3)Bi-penetration to develop the abundant phase-boundary ionic transport channels.Compared to intrinsic Na,the reduced adsorption energy and ion-diffusion barrier on Na_(3)Bi ensure even Na^(+)nucleation and rapid Na^(+)migration within the hybrid electrode,leading to uniform deposition and dissolution at high current densities.Furthermore,the bismuthide enables compact Na deposition within the sodiophilic framework during cycling,thus favoring a high volumetric capacity.Consequently,the obtained anode was endowed with a high current density(up to 5 mA∙cm^(−2)),high areal capacity(up to 5 mA∙h∙cm^(−2)),and long-term cycling stability(up to 2800 h at 2 mA∙cm^(−2)). | Wanyu Zhao Min Guo Zhijun Zuo Xiaoli Zhao Huanglin Dou Yijie Zhang Shiying Li Zichen Wu Yayun Shi Zifeng Ma Xiaowei Yang | 2022 | Engineering2022，8，4： | 0 |
| 12 | Assessment of Atmospheric Reanalysis Data Based on Buoy Observations over the Tropical Western Indian Ocean in 2019显示文摘Atmospheric reanalysis data are an important data source for studying weather and climate systems.The sea surface wind and sea level pressure observations measured from a real-time buoy system deployed in Kenya’s offshore area in 2019 conducted jointly by Chinese and Kenyan scientists were used to evaluate the performance of the major high-frequency atmospheric reanalysis products in the western Indian Ocean region.Compared with observations,the sea level pressure field could be accurately simulated using the atmospheric reanalysis data.However,significant discrepancies existed between the surface wind reanalysis data,especially between meridional wind and the observational data.Most of the data provide a complete understanding of sea level pressure,except for the Japanese 55-year Reanalysis data,which hold a significant system bias.The Modern-Era Reanalysis for Research and Applications,Version-2,provides an improved description of all datasets.All the reanalysis datasets for zonal wind underestimate the strength during the study period.Among reanalysis data,NCEP-DOE Atmospheric Model Intercomparison Project reanalysis data presents an inaccurate description due to the worst correlation with the observations.For meridional wind,most reanalysis datasets underestimate the variance,while the European Centre for Medium-Range Weather Forecasts Atmospheric Composition Reanalysis 4 has a larger variance than the observations.In addition to the original data comparison,the diurnal variability of sea level pressure and surface wind are also assessed,and the result indicates that the diurnal variations have a significant gap between observation and reanalysis data.This study indicates that the current high-frequency reanalysis data still have disadvantages when describing the atmospheric parameters in the Western Indian Ocean region. | LUO Yulan LIU Lin PAUL Oloo PHILIP Sagero LI Kuiping YANG Yang SU Qinglei LI Qiuchi MIAO Zichen | 2023 | Journal of Ocean University of China2023，22，4： | 0 |
| 13 | Heat management technology for solid-state high voltage and high repetitive pulse generators:Towards better effects and reliability显示文摘Solid-state high voltage high repetitive pulse generators have a broad prospect in various applications.The high power and high-frequency operation of the pulse generator suffer from the massive heat dissipation problem,which limits the improvement of the output parameters and even affects the lifetime.This article focuses on heat management technology for high voltage high repetitive pulse generators.Firstly,the typical circuit topology of the high repetitive pulse generators was summarised.From the perspective of different application requirements,the demands of the heat management design were concluded.Moreover,the heat generation characteristics and difficulties of solid-state high voltage high repetitive pulse generators were analysed.Then,the different stateof-art cooling techniques were reviewed,and their applicability and limitations for the high voltage high repetitive generators were discussed.Finally,a flow chart for heat management design was given. | Yanan Wang Linyuan Ren Zihao Yang Saikang Shen Zichen Deng Qi Yuan Weidong Ding Zhenjie Ding | 2024 | High Voltage2024，9，1： | 0 |
| 14 | Targeting LncRNA LLNLR-299G3.1 with antisense oligonucleotide inhibits malignancy of esophageal squamous cell carcinoma cells in vitro and in vivo显示文摘Accumulating evidence has indicated that long non-coding RNAs(lncRNAs)play critical roles in the development and progression of cancers,including esophageal squamous cell carcinoma(ESCC).However,the mechanisms of lncRNAs in ESCC are still incompletely understood and therapeutic attempts for in vivo targeting cancer-associated lncRNA remain a challenge.By RNA-sequencing analysis,we identified that LLNLR-299G3.1 was a novel ESCC-associated lncRNA.LLNLR-299G3.1 was up-regulated in ESCC tissues and cells and promoted ESCC cell proliferation and invasion.Silencing of LLNLR-299G3.1 with ASO(antisense oligonucleotide)resulted in opposite effects.Mechanistically,LLNLR-299G3.1 bound to cancerassociated RNA binding proteins and regulated the expression of cancer-related genes,including OSM,TNFRSF4,HRH3,and SSTR3.ChIRP-seq(chromatin isolation by RNA purification and sequencing)revealed that these genes contained enriched chromatin binding sites for LLNLR-299G3.1.Rescue experiments confirmed that the effects of LLNLR-299G3.1 on ESCC cell proliferation were dependent on interaction with HRH3 and TNFRSF4.Therapeutically,intravenous delivery of placental chondroitin sulfate A binding peptide-coated nanoparticles containing antisense oligonucleotide(pICSA-BP-ANPs)strongly inhibited ESCC tumor growth and significantly improved animal survival in vivo.Overall,our results suggest that LLNLR-299G3.1 promotes ESCC malignancy through regulating gene-chromatin interactions and targeting ESCC by pICSA-BP-ANPs may be an effective strategy for the treatment of lncRNA-associated ESCC. | LI TIAN YONGYI HUANG BAOZHEN ZHANG YI SONG LIN YANG QIANQIAN CHEN ZHENG WANG YILING WANG QIHAN HE WENHAN YANG SHUYONG YU TIANYU LU ZICHEN LIU KAIPING GAO XIUJUN FAN JIAN SONG RIHONG ZHAI | 2023 | Oncology Research2023，31，4： | 0 |
| 15 | A NEW FORGERY ATTACK ON MESSAGE RECOVERY SIGNATURES显示文摘After extending the forgery attacks to Nyberg-Rueppel’s signatures with message recovery, Atsuko Miyaji in 1997 proposed two suitable message recovery signatures, (F1) and (F2). In this paper, another new forgery attacks to (F1), (F2) and Nyberg-Rueppel’s signatures are presented. | Li Zichen Li Zhongxian Yang Yixian , Wu Weilin (PO Box 126, Information Security Center, Beijing Univ. of Posts and Telecom., Beijing 100876) | 2000 | Journal of Electronics(China)2000，17，3： | 0 |
| 16 | SECRET KEY SHARING SCHEME BASED ON THE THEORY OF ALGEBRAIC SEMIGROUPS显示文摘How to distribute a secret key information to n authorized departments, denoted as: S1, S2,…, Sn, respectively. For every autherized department Si(i = 1,2,… ,n), there are qi authorized persons, and every authorized person has the same secret key information as that of any other authorized persons in the same authorized department. The secret key information can be reconstructed completely from the secret key information of any k authorized persons, if there is at least one authorized person included for every authorized department. But other cases, the secret key information cannot be reconstructed completely. In this paper, based on the algebraic semigroup theory, a secret key sharing scheme is proposed, which can satisfy the demand. | Wang Yongchuan Li Zichen Yang Yixian (Info. Security Centre of Beijing Univ. of Posts and Telecomm., P. O. Box 126, Beijing 100876) | 2000 | Journal of Electronics(China)2000，17，3： | 0 |
| 17 | High-Precision Colorimetric Sensing by Dynamic Tracking of Solvent Diffusion in Hollow-Sphere Photonic Crystals显示文摘Expensive instruments and complicated data processing are often required to discriminate solvents with similar structures and properties.Colorimetric sensors with high selectivity,low cost,and good portability are highly desirable to simplify such detection tasks.Herein,we report the fabrication of a photonic crystal sensor based on the self-assembled resorcinol formaldehyde(RF)hollow spheres to realize colorimetric sensing of polar solvents,including homologs and isomers based on the saturated diffusion time.The diffusion of solvent molecules through the photonic crystal film exhibits a unique three-step diffusion profile accompanied by a dynamic color change,as determined by the physicochemical properties of the solvent molecules and their interactions with the polymer shells,making it possible to accurately identify the solvent type based on the dynamic reflection spectra or visual perception.With its superior selectivity and sensitivity,this single-component colorimetric sensor represents a straightforward tool for convenient solvent detection and identification. | Qianqian Fu Jianping Ge Chen Chen Zichen Wang Fan Yang Yadong Yin | 2022 | Research2022，，3： | 0 |
| 18 | Techno-economic assessment of a chemical looping splitting system for H2 and CO Co-generation显示文摘The natural gas(NG)reforming is currently one of the low-cost methods for hydrogen production.However,the mixture of H2 and CO_(2) in the produced gas inevitably includes CO_(2) and necessitates the costly CO_(2) separation.In this work,a novel double chemical looping involving both combustion(CLC)and sorption-enhanced reforming(SE-CLR)was proposed towards the co-production of H2 and CO(CLC-SECLRHC)in two separated streams.CLC provides reactant CO_(2) and energy to feed SECLRHC,which generates hydrogen in a higher purity,as well as the calcium cycle to generate CO in a higher purity.Techno-economic assessment of the proposed system was conducted to evaluate its efficiency and economic competitiveness.Studies revealed that the optimal molar ratios of oxygen carrier(OC)/NG and steam/NG for reforming were recommended to be 1.7 and 1.0,respectively.The heat integration within CLC and SECLRHC units can be achieved by circulating hot OCs.The desired temperatures of fuel reactor(FR)and reforming reactor(RR)should be 850C and 600C,respectively.The heat coupling between CLC and SECLRHC units can be realized via a jacket-type reactor,and the NG split ratio for reforming and combustion was 0.53:0.47.Under the optimal conditions,the H2 purity,the H2 yield and the CH4 conversion efficiency were 98.76%,2.31 mol mol-1 and 97.96%,respectively.The carbon and hydrogen utilization efficiency respectively were 58.60% and 72.45%in terms of the total hydrogen in both steam and NG.The exergy efficiency of the overall process reached 70.28%.In terms of the conventional plant capacity(75 × 103 t y^(-1))and current raw materials price(2500$t^(-1)),the payback period can be 6.2 years and the IRR would be 11.5,demonstrating an economically feasible and risk resistant capability. | Hao Peng Zichen Di Pan Gong Fengling Yang Fangqin Cheng | 2023 | Green Energy & Environment2023，8，1： | 0 |
| 19 | Habenula,a potential central target for glucose metabolism in type 2 diabetes显示文摘The role of the habenular nucleus(Hb)in the pathogenesis of depression has been thoroughly studied,but whether it functions in the pathogenesis of diabetes remains unknown.In this study,type 2 diabetes(T2DM)rats,which induced by the high-carbohydrate and fat diet combined with STZ were employed.The functions of Hb were suppressed by application of electrical lesion.Compared with the sham group,the expression levels of AMPK phosphorylation and insulin receptor were significantly increased,whereas glucose-6-phosphatase and phosphoenolpyruvate carboxylated kinase was reduced,in the liver of the Hb lesions group. | Qu Peng Wang Yachun Sun Yimeng Xu Zichen Yang Limin | 2021 | 解剖学杂志2021，44，S01： | 0 |
| 20 | Enhanced cyanogen chloride formation after UV/PS and UV/H_(2)O_(2) pre-oxidation and chlorination in natural river water显示文摘Ultraviolet/persulfate (UV/PS) and Ultraviolet/hydrogen peroxide (UV/H_(2)O_(2)) have attracted much attention in recent years as advanced oxidation processes for water treatment.However,it is not all clear how these two methods affect the formation of cyanogen chloride(CNCl) in the subsequent water chlorination process.In this study,it was found that both UV/H_(2)O_(2)and UV/PS pre-oxidation promoted the formation of CNCl in six actual water samples collected from urban rivers.Glycine,uric acid,arginine and histidine were investigated as the model compounds to explore the effects of different methods on the production of CNCl.The results showed that compared with chlorination alone,pre-oxidation by UV/H_(2)O_(2)and UV/PS can reduce the production of CNCl for glycine and uric acid by up to 95%during post-chlorination process.However,they can greatly promote the formation of CNCl for arginine and histidine by up to 120-fold.In a more detailed investigation,pre-oxidation of histidine formed highly reactive intermediates to chlorine,leading to increased CNCl formation and chlorine consumption.The results showed that the precursors of CNCl was altered after pre-oxidation,and need to be re-evaluated. | Jie Xu Yang Guo Qian Yang Xueling Bai Runhua Lu Menghui Liu Zichen Kuang Luo Zhang Jing Li | 2023 | Journal of Environmental Sciences2023，，4： | 0 |
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