It has very important practical significance for the universities of China to open the courses of professional English for science and engineering majors especially for environmentalscience and *** there exists the p...
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It has very important practical significance for the universities of China to open the courses of professional English for science and engineering majors especially for environmentalscience and *** there exists the phenomenon that overemphasizing the decisive roles of the teachers in the teaching process while ignoring the interactivity of the students in the process of class learning and correct evaluation and examination for the learning *** article investigates about the learning ability of the undergraduates of science and engineering universities for specialized English and class teaching effect,analyzes the actual situation,and gives several relative suggestions about educational reforms.
Two anaerobic ammonia oxidation(anammox)systems,one with adding nano-scale zerovalent iron modified biochar(nZVI@BC)and the other with adding biochar,were constructed to explore the feasibility of nZVI@BC for enhancin...
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Two anaerobic ammonia oxidation(anammox)systems,one with adding nano-scale zerovalent iron modified biochar(nZVI@BC)and the other with adding biochar,were constructed to explore the feasibility of nZVI@BC for enhancing the resistance of low-nitrogen anammox processes to low *** results showed that the average nitrogen removal efficiency with nZVI@BC addition at lowtemperatureswas maintained at about 80%,while that with biochar addition gradually decreased to 69.49%.The heme-c content of biomass with nZVI@BC was significantly higher by 36.60%-91.45%.Additional,nZVI@BC addition resulted in more extracellular polymeric substances,better biomass granulation,and a higher abundance of anammox *** particularly,anammox genes hzsA/B/C,hzo and hdh played a pivotal role in maintaining nitrogen removal performance at 15℃.These findings suggest that nZVI@BC has the potential to enhance the resistance of low-nitrogen anammox processes to low temperatures,making it a valuable approach for practical applications in low-nitrogen and low-temperature wastewater treatment.
The catalytic efficacy of copper-based catalysts for volatile organic compounds（VOCs） oxidation is significantly affected by the metal oxide support's chemical properties. However, rigorous comparative analyses ...
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The catalytic efficacy of copper-based catalysts for volatile organic compounds（VOCs） oxidation is significantly affected by the metal oxide support's chemical properties. However, rigorous comparative analyses on TiO2and CeO2supports are scarce. This study systematically constructs Cu/TiO2and Cu/CeO2catalysts and investigates their mechanisms in promoting propane oxidation. Cu/CeO2exhibits superior performance and stability. Our research reveals the key role of Cu-O-Ce interfacial architecture in forming Cu1+sites for efficient propane adsorption and triggering surface Olattgeneration, accelerating propane combustion. These findings elucidate Cu/CeO2catalyst enhanced performance and offer insights into non-noble metal catalysts. By demonstrating CeO2catalyst superiority, this study provides a basis for selecting optimal support materials to optimize catalyst performance, driving the development of cost-effective and eco-friendly catalytic technologies for air pollution control.
Catalytic oxidation of NO at room temperature was carried out over nitrogen(N)-doped sludge char(SC)prepared from pyrolysis ofmunicipal sewage sludge,and urea was adopted as nitrogen *** effects of different N-doping ...
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Catalytic oxidation of NO at room temperature was carried out over nitrogen(N)-doped sludge char(SC)prepared from pyrolysis ofmunicipal sewage sludge,and urea was adopted as nitrogen *** effects of different N-doping methods(one-step and two-step method),dried sludge(DS)/urea mass ratios(5:1,4:1,3:1,2:1,and 1:1),SC preparation procedures(pyrolysis only,pyrolysis with acid washing,and pyrolysis with KOH activation and acid washing),and different pyrolysis temperatures(500,600,700,and 800°C)on the catalytic oxidation of NO were compared to optimize the procedure for SC *** results indicated that N-doping could obviously promote the catalytic performance of *** one-step method with simultaneous sludge pyrolysis(at 700°C),KOH activation,and N-doping(DS/urea of 3:1)was the optimal procedure for preparing the N-doped SC with the NO conversion rate of 54.7%,whereas the optimal NO conversion rate of SC without N-doping was only 47.3%.Urea worked both as carbon and nitrogen source,which could increase about 2.9%-16.5%of carbon and 24.8%-42.7%of nitrogen content in SC pyrolyzed at 700°C.N-doping significantly promoted microporosity of *** optimal N-doped SC showed specific surface areas of 571.38 m^(2)/g,much higher than 374.34 m^(2)/g of the optimal SC without *** addition,N-doping also increased amorphousness and surface basicity of SC through the formation of N-containing ***,three reaction paths,*** reactor,active sites,and basic site control path,were proposed to explain the mechanism of N-doping on promoting the catalytic performance of NO.
The removal of nitrogen via the ANAMMOX process is a promising green wastewater treatment technology,with numerous *** incessant studies on the ANAMMOX process over the years due to its long start-up and high operatio...
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The removal of nitrogen via the ANAMMOX process is a promising green wastewater treatment technology,with numerous *** incessant studies on the ANAMMOX process over the years due to its long start-up and high operational cost has positively influenced its technological advancement,even though at a rather slow *** the moment,relatively newANAMMOX technologies are being developedwith the goal of treating lowcarbon wastewater at low temperatures,tackling nitrite and nitrate accumulation and methane utilization from digestates while also recovering resources(phosphorus)in a sustainable *** review compares and contrasts the handful of ANAMMOX-based processes developed thus far with plausible solutions for addressing their respective bottlenecks hindering full-scale ***,future prospects for advancing understanding of mechanisms and engineering application of ANAMMOX process are *** a whole,technological advances in process design and patents have greatly contributed to better understanding of the ANAMMOX process,which has greatly aided in the optimization and industrialization of the ANAMMOX *** review is intended to provide researchers with an overview of the present state of research and technological development of the ANAMMOX process,thus serving as a guide for realizing energy autarkic future practical applications.
Hydrogen peroxide(H_(2)O_(2))is a versatile compound with widespread applications in various *** addition,it has attracted inte rest as a potential energy carrier due to its high energy density and ability to release ...
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Hydrogen peroxide(H_(2)O_(2))is a versatile compound with widespread applications in various *** addition,it has attracted inte rest as a potential energy carrier due to its high energy density and ability to release oxygen upon *** development of photocatalytic technology has enabled sustainable production of H_(2)O_(2).Various structural materials,including organic molecules,polymers,and metal coordination compounds,have been synthesized for investigating photocatalytic H_(2)O_(2)*** earth materials,in particular,are of interest due to their adjustable porosity and controllable metal active sites,making them valuable for research in this *** materials have excellent photoelectric properties,making them promise for the photocatalytic synthesis of H_(2)O_(2).Despite limited reports on systematic reviews of photocatalytic H_(2)O_(2)production using rare earth materials,this study introduces the principles and advancements in this *** reviews different methods of photocatalytic synthesis of H_(2)O_(2),focusing on rare earth *** comprehensive analysis and systematic studies in the existing literature,a deeper understanding of enhanced photocatalytic performance has been *** research not only contributes to advancing fundamental knowledge but also provides a solid foundation for practical applications.
NH_(2)-MIL-125 and its derivatives are receivingmore attention in various aspects of photocatalytic reactions,especially in the photocatalytic hydrogen peroxide(H_(2)O_(2))production from water(H_(2)O)and oxygen(O_(2)...
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NH_(2)-MIL-125 and its derivatives are receivingmore attention in various aspects of photocatalytic reactions,especially in the photocatalytic hydrogen peroxide(H_(2)O_(2))production from water(H_(2)O)and oxygen(O_(2)),which is a promising and sustainable ***,the generation of H_(2)O_(2) from NH_(2)-MIL-125 is far from satisfactory due to rapid photo-generated carriers recombination and poor surface electron *** the work,the composite photocatalyst CQDs/TiO_(2)/NH_(2)-MIL-125(C/T/NM)was designed for the first time by one-step hydrothermal ***_(2) was in situ converted from partial NH_(2)-MIL-125(NM)during the successful loaded of Carbon quantum dots(CQDs)by hydrothermal *** results indicated the typeⅡheterojunction was successfully constructed between the NM and TiO_(2) interface,which could promote the transmission of photo-generated *** addition,the successful loaded of CQDs could effectively transfer and stored the photo-generated electrons to the photocatalyst surface to participate in the reaction,and further avoiding the recombination of photo-generated *** C/T/NM composite photocatalyst achieved a H_(2)O_(2) generation of 455μmol/L for 5 hours under visible light without oxygen bubbling,whichwas 7.1 times superior to that of *** H_(2)O_(2) generation rate reached 645.4μM/(g·h),which was in priority in the reported literature under the same ***,based on the active species capture experiments,energy band structure analysis and the photoelectrochemicalmeasurements,a possiblemechanism for the efficientH_(2)O_(2) generation through C/T/NM had been *** work provided new ideas for designing NH_(2)-MIL-125 based composite photocatalysts for the production of H_(2)O_(2).
During thewater treatment process,chlorination and ultraviolet(UV)sterilization can modify microplastics(MPs)and alter their physicochemical properties,causing various changes between MPs and other *** this study,the ...
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During thewater treatment process,chlorination and ultraviolet(UV)sterilization can modify microplastics(MPs)and alter their physicochemical properties,causing various changes between MPs and other *** this study,the impact of chlorination and UV modification on the physicochemical properties of polystyrene(PS)and polyvinyl chloride(PVC)were investigated,and the adsorption behavior of pefloxacin(PEF)before and after modificationwas *** effect of pH,ionic strength,dissolved organicmatter,heavymetal ions and other water environmental conditions on adsorption behavior was *** results showed that PS had a higher adsorption capacity of PEF than PVC,and the modification increased the presence of O-containing functional groups in the MPs,thereby enhancing the adsorption capacity of both *** had a more significant impact on the physicochemical properties of MPs compared to UV irradiation within the same time period,leading to better adsorption performance of *** optimal pH for adsorption was found to be 6,and NaCl,sodium alginate and Cu2+would inhibit adsorption to varying degrees,among which the inhibition caused by pH was the *** and UV modification would weaken the inhibitory effect of environmental factors on the adsorption of PEF by *** main mechanisms of adsorption involved electrostatic interaction and hydrogen *** study clarified the effects of modification on the physicochemical properties of MPs,providing reference for subsequent biotoxicity analysis and environmental protection studies.
The presence of aluminum(Al^(3+))and fluoride(F^(−))ions in the environment can be harmful to ecosystems and human health,highlighting the need for accurate and efficient *** this paper,an innovative approach is prese...
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The presence of aluminum(Al^(3+))and fluoride(F^(−))ions in the environment can be harmful to ecosystems and human health,highlighting the need for accurate and efficient *** this paper,an innovative approach is presented that leverages the power of machine learning to enhance the accuracy and efficiency of fluorescence-based detection for sequential quantitative analysis of aluminum(Al^(3+))and fluoride(F^(−))ions in aqueous *** proposed method involves the synthesis of sulfur-functionalized carbon dots(C-dots)as fluorescence probes,with fluorescence enhancement upon interaction with Al^(3+)ions,achieving a detection limit of 4.2 nmol/***,in the presence of F^(−)ions,fluorescence is quenched,with a detection limit of 47.6 nmol/*** fingerprints of fluorescence images are extracted using a cross-platform computer vision library in Python,followed by data ***,the fingerprint data is subjected to cluster analysis using the K-means model from machine learning,and the average Silhouette Coefficient indicates excellent model ***,a regression analysis based on the principal component analysis method is employed to achieve more precise quantitative analysis of aluminum and fluoride *** results demonstrate that the developed model excels in terms of accuracy and *** groundbreaking model not only showcases exceptional performance but also addresses the urgent need for effective environmental monitoring and risk assessment,making it a valuable tool for safeguarding our ecosystems and public health.
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