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A colorimetric nanobiosensor with enhanced sensitivity for detection of lead(Ⅱ)in real-water samples via an adeninecytosine mismatched DNAzyme

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Frontiers of environmental science & engineering 2024年第12期18卷 167-177页

作者： Jinchuan Liu Hang Yang Huanxing Li Jiancheng Wang Xiaohong Zhou College of Environmental Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China State Key Joint Laboratory of ESPC School of EnvironmentTsinghua UniversityBeijing 100084China

Facile and ultrasensitive detection of Pb^(2+)in water for remote or resource-limited environments remains ***-based colorimetric nanobiosensors have been extensively studied to regulate the assembly of functionalized gold nanoparticles(AuNPs).However,these nanobiosensors have been criticized for their low sensitivity owing to the difficulty of dissociating DNAzyme embedded in AuNP *** address this issue,we rationally designed a DNAzyme by introducing an adenine-cytosine(A-C)mismatch to strengthen the disassembly of DNAzyme-linked *** proof of concept,a“turn on”colorimetric nanobiosensor integrated with mismatched DNAzyme and functionalized AuNPs was first developed for Pb^(2+)*** the optimal detection conditions,the obtained typical calibration curve shows a detection limit of 8.6 nmol/L,with an approximately 11-fold sensitivity improvement in Pb^(2+)detection compared with unmismatched DNAzyme,and a linear response range from 10 to 300 nmol/*** nanobiosensor demonstrated robust selectivity and satisfactory recovery rates between 86.5%and 106.4%for Pb^(2+)in spiked environmental water ***,the detection process is user-friendly and can be completed within 30 min,requiring only a simple water sample addition *** the extensive applications of DNAzyme in conjunction with nanoparticles,this study provides a valuable reference for designing other DNAzyme-powered nanoparticle assemblies in biosensing systems.

关键词： Trace lead(Ⅱ)ions Modified mismatched DNAzyme Gold nanoparticles Colorimetric nanobiosensor environmental water samples

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Enhanced removal of high-As(Ⅲ)from Cl(-Ⅰ)-diluted SO_(4)(-Ⅱ)-rich wastewater at pH 2.3 via mixed tooeleite and(Cl(-Ⅰ)-free)ferric arsenite hydroxychloride formation

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Journal of environmental sciences 2023年第2期124卷 31-41页

作者： Zidan Yuan Guoqing Zhang Xing Wu Xu Ma Jinru Lin Shaofeng Wang Yongfeng Jia Key Laboratory of Pollution Ecology and Environmental Engineering Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control Ministry of EducationHenan Key Laboratory for Environmental Pollution ControlSchool of EnvironmentHenan Normal UniversityHenan 453007China Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education China)School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

An advanced cost-saving method of removal of high-As(Ⅲ)from SO_(4)(-Ⅱ)-rich metallurgical wastewater has been developed by diluting the SO_(4)(-Ⅱ)content with As(Ⅲ)-Cl(-Ⅰ)-rich metallurgical wastewater and then by the direct precipitation of As(Ⅲ)with Fe(Ⅲ)at pH ***(Ⅲ)removal at various SO_(4)(-Ⅱ)/Cl(-Ⅰ)molar ratios and temperatures was *** results showed that 65.2–98.2%of As(Ⅲ)immobilization into solids occurred at the SO_(4)(-Ⅱ)/Cl(-I)molar ratios of 1:1–32 and 15–60℃in 3 days,which were far higher than those in aqueous sole SO4(-Ⅱ)or Cl(-Ⅰ)media at the equimolar SO_(4)(-Ⅱ)or Cl(-Ⅰ)and the same ***_(4)(-Ⅱ)/Cl(-Ⅰ)molar ratio of 1:4 and 25℃were optimal conditions to reach the As removal *** aqueous SO4(-Ⅱ)and Cl(-Ⅰ)played a synergetic role in the main tooeleite formation together with(Cl(-Ⅰ)-free)ferric arsenite hydroxychloride(FAHC)involving the substitution of AsO_(3)^(3−)for Cl(-Ⅰ)for enhanced As *** competitive complexation among FeH_(2)AsO_(3)^(2+),FeSO_(4)^(+)and FeCl^(2+)complexes was the main mechanism for the maximum As(Ⅲ)precipitation at the SO4(-Ⅱ)/Cl(-I)molar ratio of 1:*** As(Ⅲ)immobilization at high temperature with increased Fe(Ⅲ)hydrolysis was due to the formation of As(Ⅲ)-bearing ferrihydrite with the relatively high Fe/As molar ratio at acidic pH.

关键词： High-As(III) Sulfate Chlorine ion Removal Complex

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Dynamic coupling of ferrihydrite transformation and associated arsenic desorption/redistribution mediated by sulfate-reducing bacteria

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Journal of environmental sciences 2024年第1期135卷 39-50页

作者： Wenjing Zhou Huiyan Zhu Shiwen Hu Bowei Zhang Kun Gao Zhi Dang Chongxuan Liu State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSouth China University of TechnologyGuangzhou 510006China

Sulfate-reducing bacteria play an important role in the geochemistry of iron(oxyhydr)oxide and arsenic(As)in natural environments;however,the associated reaction processes are yet to be fully *** this study,batch experiments coupled with geochemical,spectroscopic,microscopic,and thermodynamic analyses were conducted to investigate the dynamic coupling of ferrihydrite transformation and the associated As desorption/redistribution mediated by Desulfovibrio vulgaris(***).The results indicated that *** could induce ferrihydrite transformation via S^(2-)-driven and direct reduction *** the absence of SO_(4)^(2-),*** directly reduced ferrihydrite,and As desorption and re-sorption occurred simultaneously during the partial transformation of ferrihydrite to *** increase in SO_(4)^(2-)loading promoted the S^(2-)-driven reduction of ferrihydrite and accelerated the subsequent mineralogical *** the low and medium SO_(4)^(2-)treatments,ferrihydrite was completely transformed to a mixture of magnetite and mackinawite,which increased the fraction of As in the residual phase and stabilized *** the high SO_(4)^(2-)treatment,although the replacement of ferrihydrite by only mackinawite also increased the fraction of As in the residual phase,22.1%of the total As was released into the solution due to the poor adsorption affinity of As to mackinawite and the conversion of As^(5+)to As^(3+).The mechanisms of ferrihydrite reduction,mineralogy transformation,and As mobilization and redistribution mediated by sulfate-reducing bacteria are closely related to the surrounding SO_(4)^(2-)*** results advance our understanding of the biogeochemical behavior of Fe,S,and As,and are helpful for the risk assessment and remediation of As contamination.

关键词： Sulfate-reducing bacteria Arsenic Ferrihydrite Transformation Redistribution

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Self-healing of active site in Co(OH)_(2)/MXene electrocatalysts for hydrazine oxidation

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Journal of Materials science & technology 2024年第36期203卷 108-117页

作者： Kun Xiang Yongjing Wang Zechao Zhuang Jing Zou Neng Li Dingsheng Wang Tianyou Zhai Jizhou Jiang School of Environmental Ecology and Biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationNovel Catalytic Materials of Hubei Engineering Research CenterWuhan Institute of TechnologyWuhan 430205China Department of Chemistry Tsinghua UniversityBeijing 100084China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The development of efficient hydrazine oxidation reaction(HzOR)catalysts is important for the construc-tion of remarkable energy storage and conversion ***,after a period of electrochemical reaction,the active site of the catalyst will be irreversibly reduced or inactivated,and how to recover the active site is a major ***,we report 2D Co(OH)_(2)/Ti_(3)C_(2)(OH)_(x)MXene composites with rapid re-construction and self-healing behaviors as efficient and stable electrocatalysts during HzOR *** experimental and theoretical results indicate that the introduction of Ti_(3)C_(2)(OH)_(x)MXene can effectively reduce the dehydrogenation barrier of Co(OH)_(2),from 0.584 eV to 0.481 eV to form the real catalytic active center Co(OH)***,Co(OH)O/Ti_(3)C_(2)(OH)_(x)MXene composites with metal-like conductiv-ity not only present spontaneous adsorption capacity of N_(2)H_(4),but also can modulated rate-determining step of dehydrogenation of∗N_(2)H_(4)to∗N_(2)H_(3)(0.54 eV)compared with Co(OH)***,the electrophilic oxygen of Co(OH)O/Ti_(3)C_(2)(OH)_(x)can spontaneously obtain electrons and protons from N_(2)H_(4),achieving the oxidation of N_(2)H_(4)while reducing Co(OH)O to Co(OH)_(2),thus completing the self-healing of the efficient catalyst.

关键词： Hydrazine oxidation Self-healing Reconstruction Co(OH)_(2)/MXene Electrocatalysis

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System reliability evaluation method considering physical dependency with FMT and BDD analytical algorithm

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Journal of Systems engineering and Electronics 2022年第1期33卷 222-232页

作者： CHEN Ying WANG Yanfang YANG Song KANG Rui School of Reliability and System Engineering Beihang UniversityBeijing 100191China Science and Technology on Reliability and Environmental Engineering Laboratory Beihang UniversityBeijing 100191China China Academy of Launch Vehicle Technology Bejing 100076China

Recently, the physics-of-failure(PoF) method has been more and more popular in engineering to understand the failure mechanisms(FMs) of ***, due to the lack of system modeling methods and problem-solving algorithms,the information of FMs cannot be used to evaluate system *** paper presents a system reliability evaluation method with failure mechanism tree(FMT) considering physical dependency(PDEP) such as competition, trigger, acceleration, inhibition, damage accumulation, and parameter *** the binary decision diagram(BDD) analytical algorithm is developed to establish a system reliability *** operation rules of ite operators for generating BDD are *** flow chart of system reliability evaluation method based on FMT and BDD is *** proposed method is applied in the case of an electronic controller drive *** show that the method is effective to evaluate system reliability from the perspective of FM.

关键词： system reliability modeling failure physical dependency failure mechanism tree(FMT) binary decision diagram(BDD)

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FeMo@porous carbon derived from MIL-53(Fe)@MoO_(3) as excellent heterogeneous electro-Fenton catalyst: Co-catalysis of Mo

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Journal of environmental sciences 2023年第5期127卷 652-666页

作者： Xuedong Du Wenyang Fu Pei Su Qizhan Zhang Minghua Zhou Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution Nankai UniversityTianjin 300350China Tianjin Advanced Water Treatment Technology International Joint Research Center College of Environmental Science and EngineeringNankai UniversityTianjin 300350China

An ultra-efficient electro-Fenton catalyst with porous carbon coated Fe-Mo metal(FeMo@PC),was prepared by calcining MIL-53(Fe)@MoO_(3).This FeMo@PC-2 exhibited impressive catalytic performance for sulfamethazine(SMT)degradation with a high turnover frequency value(7.89 L/(g·min)),much better than most of reported *** mineralization current efficiency and electric energy consumption were 83.2%and 0.03 kWh/gTOC,respectively,at lowcurrent(5mA)and small dosage of catalyst(25.0mg/L).The removal rate of heterogeneous electro-Fenton(Hetero-EF)process catalyzed by FeMo@PC-2 was 4.58 times that of Fe@PC/Hetero-EF *** the internal-micro-electrolysis occurred between PC and Fe0,while the co-catalysis of Mo accelerated the rate-limiting step of the Fe^(3+)/Fe^(2+) cycle and greatly improved the H_(2)O_(2)utilization *** results of radical scavenger experiments and electron paramagnetic resonance confirmed the main role of surface-bound hydroxyl radical *** process was feasible to remove diverse organic contaminants such as phenol,2,4-dichlorophenoxyacetic acid,carbamazepine and *** paper enlightened the importance of the doped Mo,which could greatly improve the activity of the iron-carbon heterogeneous catalyst derived from metal-organic frameworks in EF process for efficient removal of organic contaminants.

关键词： Metal-organic frameworks derivatives Fe-Mo bimetal Porous carbon Co-catalysis Heterogeneous electro-Fenton

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Phase changes and electromagnetic wave absorption performance of XZnC(X=Fe/Co/Cu)loaded on melamine sponge hollow carbon composites

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International Journal of Minerals,Metallurgy and Materials 2025年第3期32卷 566-577页

作者： Xiubo Xie Ruilin Liu Chen Chen Di Lan Zhelin Chen Wei Du Guanglei Wu School of Environmental and Material Engineering Yantai UniversityYantai 264005China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta Shandong University of AeronauticsBinzhou 256603China Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Non-stoichiometric carbides have been proven to be effective electromagnetic wave(EMW)absorbing *** this study,phase and morphology of XZnC(X=Fe/Co/Cu)loaded on a three dimensional(3D)network structure melamine sponge(MS)carbon composites were investigated through vacuum filtration followed by *** FeZnC/CoZnC/CuZnC with carbon nanotubes(CNTs)were uniformly dispersed on the surface of melamine sponge carbon skeleton and Co-containing sample exhibits the highest CNTs *** minimum reflection loss(RL_(min))of the CoZnC/MS composite(m_(composite):m_(paraffin)=1:1,m represents mass)reached-33.60 dB,and the effective absorption bandwidth(EAB)reached 9.60 *** outstanding electromagnetic wave absorption(EMWA)properties of the CoZnC/MS composite can be attributed to its unique hollow structure,which leads to multiple reflections and *** formed conductive network improves dielectric and conductive *** incorporation of Co enhances the magnetic loss capability and optimizes interfacial polarization and dipole *** simultaneously improving dielectric and magnetic losses,ex-cellent impedance matching performance is *** clarification of element replacement in XZnC/MS composites provides an effi-cient design perspective for high-performance non-stoichiometric carbide EMW absorbers.

关键词： electromagnetic wave absorption three dimensional network structure melamine sponge derived carbon non-stoichiometric carbide

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A critical review on thermodynamic mechanisms of membrane fouling in membrane-based water treatment process

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Frontiers of environmental science & engineering 2023年第10期17卷 147-169页

作者： Jiaheng Teng Ying Deng Xiaoni Zhou Wenfa Yang Zhengyi Huang Hanmin Zhang Meijia Zhang Hongjun Lin Key Laboratory of Watershed Earth Surface Processes and Ecological Security College of Geography and Environmental SciencesZhejiang Normal UniversityJinhua 321004China Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

Membrane technology is widely regarded as one of the most promising technologies for wastewater treatment and reclamation in the 21st century. However, membrane fouling significantly limits its applicability and productivity. In recent decades, research on the membrane fouling has been one of the hottest spots in the field of membrane technology. In particular, recent advances in thermodynamics have substantially widened people’s perspectives on the intrinsic mechanisms of membrane fouling. Formulation of fouling mitigation strategies and fabrication of anti-fouling membranes have both benefited substantially from those studies. In the present review, a summary of the recent results on the thermodynamic mechanisms associated with the critical adhesion and filtration processes during membrane fouling is provided. Firstly, the importance of thermodynamics in membrane fouling is comprehensively assessed. Secondly, the quantitative methods and general factors involved in thermodynamic fouling mechanisms are critically reviewed. Based on the aforementioned information, a brief discussion is presented on the potential applications of thermodynamic fouling mechanisms for membrane fouling control. Finally, prospects for further research on thermodynamic mechanisms underlying membrane fouling are presented. Overall, the present review offers comprehensive and in-depth information on the thermodynamic mechanisms associated with complex fouling behaviors, which will further facilitate research and development in membrane technology.

关键词： Membrane fouling Thermodynamic mechanism XDLVO theory Flory-Huggins theory Fouling migration

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Lanthanum hydroxide showed best application potential in La-based materials based on its stable phosphate adsorption properties in complex water environments

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Journal of environmental sciences 2025年第6期152卷 465-476页

作者： Linjuan Zhu Yao Zhang Shuo Xu Baoyou Shi Haotian Hao Yili Wang College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water PollutionBeijing Forestry UniversityBeijing 100083China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Three lanthanum morphology materials encompassing all lanthanum composites were synthesized by the direct precipitation method,and their phosphate adsorption order was determined as La_(2)(CO_(3))_(3)>La(OH)_(3)>La_(2)O_(3).Further comparison of the adsorption performance between La_(2)(CO_(3))_(3) and La(OH)_(3) revealed that the former exhibited a twofold higher rate of adsorption compared to the *** presence of SO_(4)^(2−),HCO_(3)−,Mg^(2+),and HA in the water led to a decrease in the phosphate adsorption of La_(2)(CO_(3))_(3) and La(OH)_(3),while Ca^(2+)enhances the adsorption of phosphoric acid by both *** to La_(2)(CO_(3))_(3),La(OH)_(3) exhibited stronger resistance against coexisting *** pH was the limiting factor for phosphate adsorption in both cases,and their adsorption capacity decreased significantly as the pH *** phosphate adsorption mechanism of La_(2)(CO_(3))_(3) was ligand exchange to form inner-sphere complexes,while the phosphate adsorption mechanism of La(OH)_(3) involved ligand exchange,inner-sphere complexation,and electrostatic *** stability of La(OH)_(3) exhibited superior performance compared to that of La_(2)(CO_(3))_(3) over 5 adsorption-desorption *** La_(2)(CO_(3))_(3) had a higher initial phosphate adsorption capacity than La(OH)_(3),its phosphate adsorption capacity decreased by 40%after five adsorption-desorption cycles,while that of La(OH)_(3) decreased by 2.3%.Additionally,the amount of La(OH)_(3) adsorbed after five cycles was 25.6%higher than that of La_(2)(CO_(3))_(3).Therefore,La(OH)_(3) performs better regeneration adsorption than La_(2)(CO_(3))_(3).Furthermore,a smaller dosage of La(OH)_(3) was required compared to La_(2)(CO_(3))_(3) in a test aimed at lowering the actual phosphate concentration in water to 0.5 mg/*** summary,La(OH)_(3) is a more suitable substrate for cyclic adsorption for phosphorus removal than La_(2)(CO_(3))_(3) and has better potential for practi

关键词： Phosphate removal Adsorption La(OH)3 La2(CO_(3))3 Regeneration

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Competing esterification and oligomerization reactions of typical long-chain alcohols to secondary organic aerosol formation

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Journal of environmental sciences 2023年第4期126卷 103-112页

作者： Jiaxin Wang Xiaohui Ma Yuemeng Ji Yongpeng Ji Yanpeng Gao Yuqi Xiao Guiying Li Taicheng An Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthInstitute of Environmental Health and Pollution controlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Key Laboratory of City Cluster Environmental Safety and Green DevelopmentSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Organosulfate (OSA) nanoparticles,as secondary organic aerosol (SOA) compositions,are ubiquitous in urban and rural ***,we systemically investigated the mechanisms and kinetics of aqueous-phase reactions of 1-butanol/1-decanol (BOL/DOL) and their roles in the formation of OSA nanoparticles by using quantum chemical and kinetic *** mechanism results show that the aqueous-phase reactions of BOL/DOL start from initial protonation at alcoholic OH^(-)groups to form carbenium ions (CBs),which engage in the subsequent esterification or oligomerization reactions to form OSAs/organosulfites (OSIs) or *** kinetic results reveal that dehydration to form CBs for BOL and DOL reaction systems is the rate-limiting ***,about 18%of CBs occur via oligomerization to dimers,which are difficult to further oligomerize because all reactive sites are *** rate constant of BOL reaction system is one order of magnitude larger than that of DOL reaction system,implying that relative short-chain alcohols are more prone to contribute OSAs/OSIs than long-chain *** results reveal that typical long-chain alcohols contribute SOA formation via esterification rather than oligomerization because OSA/OSI produced by esterification engages in nanoparticle growth through enhancing hygroscopicity.

关键词： Long-chain alcohols Organosulfates Aqueous phase reaction Reaction mechanisms Secondary organic aerosol

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