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Determination of selected semi-volatile organic compounds in water using automated online solid-phase

Yongtao LI, Christina L. MCCARTY, Ed J. GEORGE

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 417-425 doi: 10.1007/s11783-011-0310-x

Abstract: A rapid, sensitive, and cost-effective analytical method was developed for the analysis of selected semi-volatileorganic compounds in water.The method was validated for the analysis of 30 semi-volatile analytes in drinking water, groundwatermethod can be used as an effective approach for screening and/or compliance monitoring of selected semi-volatileorganic compounds in water.

Keywords： extraction     programmed-temperature vaporization     large-volume injection     gas chromatography/mass spectrometry     semi-volatileorganic compounds     water analysis    

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Micromixing performance of the teethed high shear mixer under semi-batch operation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 4,   Pages 546-559 doi: 10.1007/s11705-021-2069-3

Abstract: Semi-batch operated reaction processes are necessary for some competitive reaction systems to achieveparameters of the teethed high shear mixers were adjusted to study the micromixing performance in the semi-batchcarried out to disclose the evolution of the flow pattern and turbulent energy dissipation rate of the semi-batchparameters studied in this work, which can provide valuable guidance on the design and optimization of the semi-batch

Keywords： high shear mixer     semi-batch operation     micromixing performance     Villermaux/Dushman system     segregation    

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Bending and rotational behaviour of semi-continuous composite beams

WANG Jingfeng, LI Guoqiang

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 116-122 doi: 10.1007/s11709-008-0015-9

Abstract: Stresses and deflections were measured in various semi-continuous composite beams.composite connections were measured in terms of beam curvatures and deflections by using two full-scale semi-rigidThe effect of semi-rigid connections on the performance of composite beams with various loadings wasThe tests show that the semi-continuous composite beams are more economic and effective than the simpleThe semi-rigid connections affect the bending capacities and beam deflections, so the connection behavior

Keywords： rotational     effective     deflection calculation     semi-continuous composite     full-scale semi-rigid    

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Recent advances in electrochemical decontamination of perfluorinated compounds from water: a review

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 2, doi: 10.1007/s11783-023-1618-z

Abstract:

● Recent advances in the electrochemical decontamination of PFAS are reviewed.

Keywords： Perfluorinated compounds     Electrochemical approach     Working mechanisms     Impacting factor     Coupled process    

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Effect of co-existing organic compounds on adsorption of perfluorinated compounds onto carbon nanotubes

Shubo DENG,Yue BEI,Xinyu LU,Ziwen DU,Bin WANG,Yujue WANG,Jun HUANG,Gang YU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 784-792 doi: 10.1007/s11783-015-0790-1

Abstract: Co-existing organic compounds may affect the adsorption of perfluorinated compounds (PFCs) and carbonThe effect of co-existing organic compounds on PFOS adsorption followed the decreasing order of humicThe increase of both initial concentrations and the number of aromatic rings of co-existing organic compounds

Keywords： perfluorinated compounds     carbon nanotubes     competitive adsorption     humic acid     perfluorooctane sulfonate    

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Characteristics of carbonyls and volatile organic compounds (VOCs) in residences in Beijing, China

Hengyi DUAN,Xiaotu LIU,Meilin YAN,Yatao WU,Zhaorong LIU

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 73-84 doi: 10.1007/s11783-014-0743-0

Abstract: Volatile organic compounds (VOCs) and carbonyl compounds were measured both indoors and outdoors in 50SUMMA canisters for VOCs and diffusive samplers for carbonyl compounds were deployed for 24 h at eachsite, and 94 compounds were quantified.Carbonyl compounds and some chlorinated compounds had higher concentrations in the non-heating season, while alkanes, alkenes, aromatic compounds showed an increase in the heating season.

Keywords： indoor air     Volatile organic compounds (VOCs)     residence     carbonyl compounds    

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Catalytic conversion of biomass-derived compounds to various amino acids: status and perspectives

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7,   Pages 817-829 doi: 10.1007/s11705-022-2254-z

Abstract: Amino acids are important nitrogen-containing chemicals that have a variety of applications. Currently, fermentation is the widely employed method to produce amino acids; however, the products are mostly limited to natural amino acids in the L-configuration. Catalytic synthesis is an alternative approach for the synthesis of amino acids with different types and configurations, where the use of renewable biomass-based feedstocks is highly attractive. To date, several lignocellulose and triacylglycerol-derived intermediates, typically α-keto acids and α-hydroxyl acids, have been transformed into amino acids via the amination reaction in the presence of additional nitrogen sources (i.e., NH3·H2O). Making full use of inherent nitrogen in biomass (i.e., chitin and protein) to produce amino acids avoids the use of extra nitrogen sources and meets the requirements of green chemistry, which is attracting increasing attention. In this review, we summarize different chemical-catalytic systems for the transformation of biomass to amino acids. An outlook on the challenges and opportunities for more effective production of amino acids from biomass by catalytic methods is provided.

Keywords： biomass     amino acids     chitin     nitrogen-containing compounds     lignocellulose    

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Catalytic combustion of volatile organic compounds using perovskite oxides catalysts—a review

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1649-1676 doi: 10.1007/s11705-023-2324-x

Abstract: With the rapid development of industry, volatile organic compounds (VOCs) are gaining attention as a

Keywords： perovskite oxides     volatile organic compounds     catalytic combustion     reaction mechanism    

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Prediction of the theoretical and semi-empirical model of ambient temperature

Foued CHABANE,Noureddine MOUMMI,Abdelhafid BRIMA,Abdelhafid MOUMMI

Frontiers in Energy 2016, Volume 10, Issue 3,   Pages 268-276 doi: 10.1007/s11708-016-0413-y

Abstract: It is well known that the ambient temperature is a sensitive parameter which has a great effect on biology, technology, geology and even on human behavior. A prediction is a statement about an uncertain event. It is often, but not always, based upon experience or knowledge. Although guaranteed accurate information about the future is in many cases impossible, prediction can be useful to assist in making plans about possible developments. As a result, temperature profiles can be developed which accurately represent the expected ambient temperature exposure that this environment experiences during measurement. The ambient temperature over time is modeled based on the previous and data and using a Lagrange interpolation. To observe the comprehensive variation of ambient temperature the profile must be determined numerically. The model proposed in this paper can provide an acceptable way to measure the change in ambient temperature.

Keywords： ambient temperature     environment     correlation     theoretical model     semi-empirical    

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New branched benign compounds including double antibiotic scaffolds: synthesis, simulation and adsorption

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2,   Pages 167-182 doi: 10.1007/s11705-022-2199-2

Abstract: were prepared by multi-step routes and purified by simple performance, which were used as the target compoundsMeanwhile, a single norfloxacin or ciprofloxacin skeleton based molecules were synthesized as the reference compoundsThe anticorrosion of the studied compounds for mild steel in HCl solution was investigated by electrochemistry

Keywords： branched compounds     floxacin scaffold     mild steel     anticorrosion     environmentally benign    

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Cavitation in semi-open centrifugal impellers for a miniature pump

LUO Xianwu, LIU Shuhong, ZHANG Yao, XU Hongyuan

Frontiers in Energy 2008, Volume 2, Issue 1,   Pages 31-35 doi: 10.1007/s11708-008-0011-8

Abstract: Cavitation in miniature pumps was investigated experimentally for two semi-open centrifugal impellershave similar cavitation performances as an ordinary-size pump, with the cavitation performance of the semi-openAlso, both the hydraulic and cavitation performance of the semi-open impeller were improved by the leaned

Keywords： cavitation performance     semi-open impeller     increased     two-dimensional     efficiency    

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Indoor carbonyl compounds in an academic building in Beijing, China: concentrations and influencing factors

Chuanjia JIANG, Pengyi ZHANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2,   Pages 184-194 doi: 10.1007/s11783-011-0309-3

Abstract: Carbonyl compounds in indoor air are of great concern for their adverse health effects.Between February and May, 2009, concentrations of 13 carbonyl compounds were measured in an academicDiurnal variations of the carbonyl compounds were investigated in one office room, and carbonyl concentrationsAverage concentrations of carbonyl compounds in the office room were generally higher in early May than

Keywords： carbonyl compounds     indoor air     ventilation     human occupancy     source emission rate (SER)     principal component    

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Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode

Tao Lu, Qilei Zhang, Shanjing Yao

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 3,   Pages 338-345 doi: 10.1007/s11705-017-1644-0

Abstract: This semi-continuous mode, which consists of commutative processes of dye-removal and re-culture, has

Keywords： dye     mycelial pellets     marine fungus     bubble column reactor     semi-continuous biosorption    

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Pollution survey of carbonyl compounds in train air

LU Hao, ZHU Lizhong

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 125-128 doi: 10.1007/s11783-007-0023-3

Abstract: In this work, pollution from carbonyl compounds was measured in the air of six trains.It was indicated that the total concentrations of carbonyl compounds were 0.159 0.2828 mg/m with theThe carbonyl compounds probably came from woodwork and cigarette smoking.The intake of carbonyl compounds for the passengers was approximately 0.043 0.076 mg/h.The carbonyl compounds in train air could be harmful to human health.
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Utilization of waste vanadium-bearing resources in the preparation of rare-earth vanadate catalysts for semi-hydrogenation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1793-1806 doi: 10.1007/s11705-022-2191-x

Abstract: Importantly, we found that rare-earth vanadate catalysts exhibited good activities toward the semi-hydrogenation

Keywords： petrochemical solid wastes     vanadium recovery     resource utilization     nanomaterials     semi-hydrogenation    

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Title Author Date Type Operation

Determination of selected semi-volatile organic compounds in water using automated online solid-phase

Yongtao LI, Christina L. MCCARTY, Ed J. GEORGE

Journal Article

Micromixing performance of the teethed high shear mixer under semi-batch operation

Journal Article

Bending and rotational behaviour of semi-continuous composite beams

WANG Jingfeng, LI Guoqiang

Journal Article

Recent advances in electrochemical decontamination of perfluorinated compounds from water: a review

Journal Article

Effect of co-existing organic compounds on adsorption of perfluorinated compounds onto carbon nanotubes

Shubo DENG,Yue BEI,Xinyu LU,Ziwen DU,Bin WANG,Yujue WANG,Jun HUANG,Gang YU

Journal Article

Characteristics of carbonyls and volatile organic compounds (VOCs) in residences in Beijing, China

Hengyi DUAN,Xiaotu LIU,Meilin YAN,Yatao WU,Zhaorong LIU

Journal Article

Catalytic conversion of biomass-derived compounds to various amino acids: status and perspectives

Journal Article

Catalytic combustion of volatile organic compounds using perovskite oxides catalysts—a review

Journal Article

Prediction of the theoretical and semi-empirical model of ambient temperature

Foued CHABANE,Noureddine MOUMMI,Abdelhafid BRIMA,Abdelhafid MOUMMI

Journal Article

New branched benign compounds including double antibiotic scaffolds: synthesis, simulation and adsorption

Journal Article

Cavitation in semi-open centrifugal impellers for a miniature pump

LUO Xianwu, LIU Shuhong, ZHANG Yao, XU Hongyuan

Journal Article

Indoor carbonyl compounds in an academic building in Beijing, China: concentrations and influencing factors

Chuanjia JIANG, Pengyi ZHANG

Journal Article

Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode

Tao Lu, Qilei Zhang, Shanjing Yao

Journal Article

Pollution survey of carbonyl compounds in train air

LU Hao, ZHU Lizhong

Journal Article

Utilization of waste vanadium-bearing resources in the preparation of rare-earth vanadate catalysts for semi-hydrogenation

Journal Article