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Effects of different sediment fractions on sorption of galaxolide

Lixia JIN, Mengchang HE, Jinghuan ZHANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 59-65 doi: 10.1007/s11783-010-0259-1

Abstract: isotherms of galaxolide (HHCB) of different fractions from two sediments with different mineral and organic carbonThe dissolved organic carbon (DOC) removed, NaOH extracted, and 375°C heating fractions showed more nonlinearCompared to the original sediments, the 375°C heating fractions had higher carbon-normalized distributioncoefficient ( ) values, indicating a higher sorption affinity for HHCB.

Keywords： galaxolide (HHCB)     sorption     organic carbon     sediment     carbon-normalized distribution coefficient (<italic>Kitalic><sub>ocsub>)    

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Developing the QSPR model for predicting the storage lipid/water distribution coefficient of organic

Miao Li, Jian Li, Yuchen Lu, Cenyang Han, Xiaoxuan Wei, Guangcai Ma, Haiying Yu

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1316-z

Abstract: Abstract • A predictive model for storage lipid/water distribution coefficient was developed. • TheThe distribution of organic compounds in stored lipids affects their migration, transformation, bioaccumulationThe storage lipid/water distribution coefficient (log Klip/w) of organic chemicals, which quantitativelydetermines such distribution, has become a key parameter to assist their ecological security and healthQuantum chemical descriptors and n-octanol/water partitioning coefficient were employed to characterize

Keywords： Storage lipid/water distribution coefficient     log K<sub>lip/wsub>     Organic compounds     QSPR     Quantum    

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Assessment of toxicity of two nitroaromatic compounds in the freshwater fish

Hongyan SHEN, Jixi GAO, Jinsheng WANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4,   Pages 518-523 doi: 10.1007/s11783-012-0427-6

Abstract: This study was conducted to evaluate the toxicological response of -nitrotoluene and -nitroaniline to the key fish species, . A freshwater fish bioassay based on the 96 h was used to estimate the single and joint toxicity of the two chemicals. The toxicity of -nitrotoluene was greater than that of -nitroaniline based on 96 h values of 40.74 mg·L and 48.99 mg·L , respectively. Both compounds had moderate toxicity toward , and this toxicity increased with the exposure duration and concentration. Binary mixtures of the compounds were more toxic than the individual compounds at 96 h, and they acted upon partial addition. When the exposure time was longer, the toxicity increased for mixtures of compounds with the same concentration or toxicity. The results of this study suggest that exposure to a combination of these chemicals would result in a higher environmental risk in aquatic systems than exposure to either compound alone. Further research is needed to investigate the combined effects and sublethal toxicity of -nitrotoluene and -nitroaniline, since they are both still used in China.

Keywords： joint toxicity     <italic>Cyprinus carpioitalic>     <italic>LCitalic><sub>50sub>     <italic>pitalic>-nitrotoluene     <italic>pitalic>-nitroaniline     toxic unit    

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Efficient CO

Yanxia Wang, Xiude Hu, Tuo Guo, Jian Hao, Chongdian Si, Qingjie Guo

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 493-504 doi: 10.1007/s11705-020-1967-0

Abstract: selectivity of NAC-650-650 is 79.93, much higher than the value of 49.77 obtained for the nonnitrogen-doped carbon

Keywords： porous carbon     CO<sub>2sub> adsorption     nitrogen-doped     adsorption mechanism     kinetics    

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Application of

Weifang SHI, Weihua ZENG

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 117-127 doi: 10.1007/s11783-013-0581-5

Abstract: The homogeneous risk characteristics within a sub-area and the heterogeneous from one sub-area to anotherWe obtain the optimal clustering number with the largest average silhouette coefficient by calculatingThe study area is divided into five sub-areas.The common environmental risk characteristics within the same sub-area, as well as the differences betweensub-areas, are presented.

Keywords： environmental risk zoning     <italic>kitalic>-means clustering     silhouette coefficient     chemical industrial    

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Synthesis of

Lili ZHANG, Ming LIU, Shijun MA, Yaodong HUANG, Yongmei WANG

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 4,   Pages 408-414 doi: 10.1007/s11705-013-1343-4

Abstract: Two new -symmetric primary-secondary diamines were synthesized via the reaction of ( , )-1,2-diphenyl ethylene diamine with 3,5-ditert-butyl salicylaldehyde and salicylaldehyde, respectively, followed by reduction with NaBH . The combination of the ligand from 3,5-ditert-butyl salicylaldehyde with CuBr could effciently catalyze the Henry reaction to afford -nitroalkanols in moderate to good yields (up to 87%) and high enantioselectivities (up to 88% ). A possible mechanism of the reaction was proposed.

Keywords： enantioselective Henry reaction     <italic>Citalic><sub>1sub>-symmetric diamines     asymmetric reaction    

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The effect of preparation conditions of Pt/Al

Lei YUAN, Xiang ZHENG, Kaijiao DUAN, Hao HU, Jinggang WANG, Seong Ihl WOO, Zhiming LIU

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 457-463 doi: 10.1007/s11783-013-0512-5

Abstract: Selective catalytic reduction of NO by H in the presence of oxygen has been investigated over Pt/Al O catalysts pre-treated under different conditions. Catalyst preparation conditions exert significant influence on the catalytic performance, and the catalyst pre-treated by H or H then followed by O is much more active than that pre-treated by air. The higher surface area and the presence of metallic Pt over Pt/Al O pre-treated by H or pretreated by H then followed by O can contribute to the formation of NO , which then promotes the reaction to proceed at low temperatures.

Keywords： NO<sub><italic>xitalic>sub> reduction     Pt/Al<sub>2sub>O<sub>3sub>     preparation condition     H<sub>2sub>-SCR    

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H<sub>∞sub> control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 264-275 doi: 10.1007/s11709-013-0214-x

Abstract: A floor isolation system installed in a single floor or room in a fixed base structure is designed to protect equipment. With this configuration, the input motions to the floor isolation from the ground motions are filtered by the structure, leaving the majority of the frequency content of the input motion lower than the predominant frequency of the structure. The floor isolation system should minimize the acceleration to protect equipment; however, displacement must also be limited to save floor space, especially with long period motion. Semi-active control with an control was adopted for the floor isolation system and a new input shaping filter was developed to account for the input motion characteristics and enhance the effectiveness of the control. A series of shake table tests for a semi-active floor isolation system using rolling pendulum isolators and a magnetic-rheological damper were performed to validate the control. Passive control using an oil damper was also tested for comparison. The test results show that the control effectively reduced acceleration for short period motions with frequencies close to the predominant frequency of the structure, as well as effectively reduced displacement for long period motions with frequencies close to the natural frequency of the floor isolation system. The control algorithm proved to be more advantageous than passive control because of its capacity to adjust control strategies according to the different motion frequency characteristics.

Keywords： semi-active     floor isolation     <italic>Hitalic><sub>∞sub> control     MR damper     shaping filter     shaking table    

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Carbon dioxide fixation by

Xuan JIA, Hai YAN, Zijing WANG, Huanju HE, Qianqian XU, Haiou WANG, Chunhua YIN, Liqin LIU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 402-408 doi: 10.1007/s11783-010-0223-0

Abstract: promising microalgal strain isolated from fresh water, which can grow both autotrophically on inorganic carbonunder lighting and heterotrophically on organic carbon without lighting, was identified as sp.USTB-01 for the fixation of carbon dioxide (CO ). It showed that the autotrophic growth of sp.

Keywords： <italic>Chlorellaitalic> sp. USTB-01     carbon dioxide fixation     combined photobioreactor    

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Factors controlling

Chengkun WANG, Xiaojian ZHANG, Chao CHEN, Jun WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 151-157 doi: 10.1007/s11783-013-0482-7

Abstract: NDMA formation increased as the dissolved organic carbon (DOC) to dissolved organic nitrogen (DON) ratio

Keywords： <italic>Nitalic>-nitrosodimethylamine (NDMA)     disinfection by-product     dissolved organic nitrogen (DOC)     hydrophilic     molecular weight (MW)     specific ultraviolet absorbance at 254 nm (SUVA<sub>254sub>)    

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Experimental investigations on combustion characteristics of syngas composed of CH

Qingwei FAN, Shien HUI, Qulan ZHOU, Qinxin ZHAO, Tongmo XU

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 404-410 doi: 10.1007/s11705-010-0513-x

Abstract: Primary air coefficient (PA), total air coefficient (TA), and components of the syngas (CS) are selected

Keywords： dual gas resources polygeneration     lean premixed combustion     residual gas     remained raw gas     NO<sub><italic>xitalic>sub> emission    

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Detecting

Chengkun WANG, Xiaojian ZHANG, Jun WANG, Chao CHEN

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 6,   Pages 770-777 doi: 10.1007/s11783-012-0412-0

Abstract: preparation was developed to study the occurrence of nitrosamines in several water treatment plants and distributionother nitrosamines were found at fairly high concentrations in several water treatment plants and distributionHigher concentrations of nitrosamines were detected in distribution systems that were further away from

Keywords： <italic>N-italic>nitrosamines     water treatment plant     distribution system     ultra-performance liquid chromatography-tandem    

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Numerical simulation and experimental verification of chemical reactions for SCR DeNO

Qiang ZHANG, Yonglin FAN, Wenyan LI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 523-528 doi: 10.1007/s11705-010-0520-y

Abstract: Selective catalytic reduction (SCR) is a major commercial technology for NO removal in power plants. There are a lot of complex chemical reactions in SCR reactors, and it is of great significance to understand the internal process of chemical reactions for SCR DeNO and study the impact of various factors on NO removal efficiency. In this paper, the impact of reaction temperature, ammonia-nitrogen molar ratio and resident time in the catalyst bed layer on NO removal efficiency were studied by simulation of chemical reactions. Then calculated results were compared with catalyst activity test data in a power plant, which proved that the simulated results were accurate. As a result, the reaction conditions were optimized in order to get the best removal efficiency of NO, so that we can provide a reference for optimal running of SCR in power plants.

Keywords： SCR     NO<sub><italic>xitalic>sub>     removal efficiency     chemical reactions     simulation    

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A combined experimental and theoretical study of micronized coal reburning

Hai ZHANG, Jiaxun LIU, Jun SHEN, Xiumin JIANG

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 119-126 doi: 10.1007/s11708-012-0226-6

Abstract: Micronized coal reburning (MCR) can not only reduce carbon in fly ash but also reduce NO emissions as

Keywords： transform infrared spectroscopy (FTIR)     density functional theory (DFT)     homogeneous reaction mechanism     NO<sub><italic>xitalic>sub>    

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Design and operational considerations for selective catalytic reduction technologies at coal-fired boilers

Jeremy J. SCHREIFELS, Shuxiao WANG, Jiming HAO

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 98-105 doi: 10.1007/s11708-012-0171-4

Abstract: As China and the rest of the world work to reduce greenhouse gas emissions, carbon dioxide (CO ) emissions

Keywords： nitrogen oxides (NO<sub><italic>xitalic>sub>)     coal     selective catalytic reduction (SCR)     air pollution    

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Title Author Date Type Operation

Effects of different sediment fractions on sorption of galaxolide

Lixia JIN, Mengchang HE, Jinghuan ZHANG

Journal Article

Developing the QSPR model for predicting the storage lipid/water distribution coefficient of organic

Miao Li, Jian Li, Yuchen Lu, Cenyang Han, Xiaoxuan Wei, Guangcai Ma, Haiying Yu

Journal Article

Assessment of toxicity of two nitroaromatic compounds in the freshwater fish

Hongyan SHEN, Jixi GAO, Jinsheng WANG

Journal Article

Efficient CO

Yanxia Wang, Xiude Hu, Tuo Guo, Jian Hao, Chongdian Si, Qingjie Guo

Journal Article

Application of

Weifang SHI, Weihua ZENG

Journal Article

Synthesis of

Lili ZHANG, Ming LIU, Shijun MA, Yaodong HUANG, Yongmei WANG

Journal Article

The effect of preparation conditions of Pt/Al

Lei YUAN, Xiang ZHENG, Kaijiao DUAN, Hao HU, Jinggang WANG, Seong Ihl WOO, Zhiming LIU

Journal Article

H<sub>∞sub> control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

Journal Article

Carbon dioxide fixation by

Xuan JIA, Hai YAN, Zijing WANG, Huanju HE, Qianqian XU, Haiou WANG, Chunhua YIN, Liqin LIU

Journal Article

Factors controlling

Chengkun WANG, Xiaojian ZHANG, Chao CHEN, Jun WANG

Journal Article

Experimental investigations on combustion characteristics of syngas composed of CH

Qingwei FAN, Shien HUI, Qulan ZHOU, Qinxin ZHAO, Tongmo XU

Journal Article

Detecting

Chengkun WANG, Xiaojian ZHANG, Jun WANG, Chao CHEN

Journal Article

Numerical simulation and experimental verification of chemical reactions for SCR DeNO

Qiang ZHANG, Yonglin FAN, Wenyan LI

Journal Article

A combined experimental and theoretical study of micronized coal reburning

Hai ZHANG, Jiaxun LIU, Jun SHEN, Xiumin JIANG

Journal Article

Design and operational considerations for selective catalytic reduction technologies at coal-fired boilers

Jeremy J. SCHREIFELS, Shuxiao WANG, Jiming HAO

Journal Article