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The influence of chlorinated aromatics' structure on their adsorption characteristics on activated carbon

Pengfei LIN,Yuan ZHANG,Xiaojian ZHANG,Chao CHEN,Yuefeng XIE,Irwin H SUFFET

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1,   Pages 138-146 doi: 10.1007/s11783-014-0725-2

Abstract: The Freundlich isotherm equation could well describe the adsorption equilibrium behaviors of chlorinatedaromatics with from 0.920 to 0.999.These results could assist water professionals in removing chlorinated aromatics during emergency drinking

Keywords： chlorinated aromatics     adsorption     powdered activated carbon     kinetics     equilibrium    

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Exergy and exergoeconomic analyses for integration of aromatics separation with aromatics upgrading

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2,   Pages 183-193 doi: 10.1007/s11705-022-2192-9

Abstract: Methanol to aromatics produces multiple products, resulting in a limited selectivity of xylene.Aromatics upgrading is an effective way to produce more valuable xylene product, and different feed ratiosThis work integrates the aromatics separation with toluene disproportionation, transalkylation of tolueneexergoeconomic analyses are conducted to give insights in the splitting ratios of benzene, toluene and heavy aromaticsfor aromatics upgrading.

Keywords： aromatics separation and upgrading     variant splitting ratios     total exergy destruction     total product    

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Microbial remediation of aromatics-contaminated soil

Ying Xu, Ning-Yi Zhou

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 2, doi: 10.1007/s11783-017-0894-x

Abstract: Aromatics-contaminated soils were successfully remediated with adding single strains.Aromatics-contaminated soil is of particular environmental concern as it exhibits carcinogenic and mutagenicIn this review, it is concluded which several successful studies of bioaugmentation of aromatics-contaminatedby microorganisms and their capacity to adapt to aromatics-contaminated environments.Aromatics-contaminated soils are successfully remediated with adding not only single strains but also

Keywords： Aromatics-contaminated soil     Bacteria     Bioaugmentation     Bioremediation     Fungi    

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Electrochemical reduction characteristics and the mechanism of chlorinated hydrocarbons at the copper

XU Wenying, GAO Tingyao, ZHOU Rongfeng, MA Lumin

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 207-212 doi: 10.1007/s11783-007-0036-y

Abstract: The electrochemical reduction characteristics of chlorinated hydrocarbons were investigated by cyclicThe reduction mechanism and activity of the chlorinated hydrocarbons at the copper electrode were exploredThe relationship between the structure of chlorinated hydrocarbons and their reductive activity wereThe experimental results showed that chlorinated alkanes and a portion of chlorinated aromatic hydrocarbonsHowever, chlorinated aromatic hydrocarbons were not easy to reduce at the copper electrode.

Keywords： electrolysis     chlorinated     relationship     mechanism     voltammetry technique    

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Degradation of chlorinated phenols by nanoscale zero-valent iron

CHENG Rong, WANG Jianlong, ZHANG Weixian

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 103-108 doi: 10.1007/s11783-008-0009-9

Abstract: particles were prepared using chemical reduction, and the reductive transformations of three kinds of chlorinated
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Decomposition of aqueous chlorinated contaminants by UV irradiation with H

Eunsung KAN,Chang-Il KOH,Kyunghyuk LEE,Joonwun KANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 429-435 doi: 10.1007/s11783-014-0677-6

Abstract: In the present study, the decomposition rates of carbon tetrachloride (CCl ) and 2,4-dichlorophenol (2,4-DCP) in water by the ultraviolet (UV) light irradiation alone and H O /UV were experimentally investigated. The detailed experimental studies have been conducted for examining treatment capacities of the two different ultraviolet light sources (low and medium pressure Hg arc) in H O /UV processes. The low or medium UV lamp alone resulted in a 60%–90% decomposition of 2,4-DCP while a slight addition of H O resulted in a drastic enhancement of the 2,4-DCP decomposition rate. The decomposition rate of 2,4-DCP with the medium pressure UV lamp alone was about 3–6 times greater than the low pressure UV lamp alone. In the direct photolysis of aqueous CCl , the medium pressure UV lamp had advantage over the low pressure UV lamp because the molar extinction coefficient of CCl at shorter wavelength (210–220 nm) is about 20 to 50 times higher than that at 254 nm. However, adding H O to the medium pressure UV lamp system rendered a negative oxidation rate because H O acted as a UV absorber being competitive with CCl due to negligible reaction between CCl and OH radicals. The results from the present study indicated significant influence of the photochemical properties of the target contaminants on the photochemical treatment characteristics for designing cost-effective UV-based degradation of toxic contaminants.

Keywords： H2O2/ultraviolet (UV) light     advanced oxidation     UV light irradiation     chlorinated    

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Fenton process for degradation of selected chlorinated aliphatic hydrocarbons exemplified by trichloroethylene

QIANG Zhimin, BEN Weiwei, HUANG Chin-Pao

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 4,   Pages 397-409 doi: 10.1007/s11783-008-0074-0

Abstract: The degradation of selected chlorinated aliphatic hydrocarbons (CAHs) exemplified by trichloroethyleneradicals (OH) preferred to attack the organic contaminants with an electron-rich structure such as chlorinated

Keywords： identified     1     1-dichloroethylene     kinetic     Dichloroacetic     Chloride    

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Kinetics and mechanisms of reactions for hydrated electron with chlorinated benzenes in aqueous solution

Haixia YUAN,Huxiang PAN,Jin SHI,Hongjing LI,Wenbo DONG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 583-590 doi: 10.1007/s11783-014-0691-8

Abstract: The reactions between chlorinated benzenes (CBzs) and hydrated electron ( ) were investigated by the

Keywords： chlorinated benzenes     hydrated electron     electron beam     laser flash photolysis    

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microspheres prepared through a facile aerosol-based process for the simultaneous adsorption and reduction of chlorinated

Bhanukiran SUNKARA,Yang SU,Jingjing ZHAN,Jibao HE,Gary L. MCPHERSON,Vijay T. JOHN

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 939-947 doi: 10.1007/s11783-015-0807-9

Abstract: aerosol-based process are effective remediation agents for the simultaneous adsorption and reduction of chlorinatedComplete dechlorination was achieved for the class of chlorinated ethenes that include tetrachloroethylenerequisite characteristics of adsorption, reaction, and transport for the effective in situ remediation of chlorinatedThe adsorption of chlorinated ethenes on the Fe-C composites is higher (>80%) than that of humic acid

Keywords： chlorinated ethene     iron-carbon     aerosol     adsorption     reductive dechlorination    

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Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1801-1808 doi: 10.1007/s11705-023-2325-9

Abstract: >13C isotope labeling experimental results demonstrate that CO2 can enter into the aromatics

Keywords： aromatics     carbon dioxide     aromatization     coupling reaction     ZSM-5 zeolite    

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Co-conversion of methanol and

Shumei Wei, Yarong Xu, Zhaoyang Jin, Xuedong Zhu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 783-792 doi: 10.1007/s11705-019-1868-2

Abstract: The conversion of -hexane and methanol into value-added aromatic compounds is a promising method for their industrially relevant utilization. In this study, intergrown ZSM-5/ZSM-11 crystals were synthesized and their resulting catalytic performance was investigated and compared to those of the isolated ZSM-5 and ZSM-11 zeolites. The physicochemical properties of ZSM-5/ZSM-11 intergrown zeolite were analyzed using X-ray diffraction, N isothermal adsorption-desorption, the temperature-programmed desorption of ammonium, scanning electron microscopy, Fourier transform infrared spectra of adsorbed pyridine, and nuclear magnetic resonance of Al , and compared with those of the ZSM-5 and ZSM-11 zeolites. The catalytic performances of the materials were evaluated during the co-feeding reaction of methanol and -hexane under the fixed bed conditions of 400°C, 0.5 MPa (N ), methanol꞉ -hexane= 7꞉3 (mass ratio), and weight hourly space velocity= 1 h (methanol). Compared to the ZSM-5 and ZSM-11 zeolites, the ZSM-5/ZSM-11 zeolite exhibited the largest specific surface area, a unique crystal structure, moderate acidity, and suitable Brønsted/Lewis acid ratio. The evaluation results showed that ZSM-5/ZSM-11 catalyst exhibited better catalytic reactivity than the ZSM-5 and ZSM-11 catalysts in terms of methanol conversion rate, -hexane conversion rate, and aromatic selectivity. The outstanding catalytic property of the intergrown ZSM-5/ZSM-11 was attributed to the enhanced diffusion associated with its unique crystal structure. The benefit of using zeolite intergrowth in the co-conversion of methanol and alkanes offers a novel route for future catalyst development.

Keywords： ZSM-5/ZSM-11     methanol     n-hexane     cofeeding     aromatics    

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The Progress and Application of the SKI Series Catalysts for Isomerization of C8 Aromatics

Qiao Yingbin

Strategic Study of CAE 1999, Volume 1, Issue 1,   Pages 73-77

Abstract: innovative idea and excellent performance of the SKI series catalysts for isomerization of C8 aromaticsThe thermodynamic equilibrium can be approached for the isomerization of the mixed C8 aromaticsThe selectivity for the C8 aromatics is more than 97% and the catalyst life-span is more than

Keywords： isomerization     catalyst     xylene    

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Alkaline modification of ZSM-5 catalysts for methanol aromatization: The effect of the alkaline concentration

Zhenhao Wei,Tengfei Xia,Minghui Liu,Qingsheng Cao,Yarong Xu,Kake Zhu,Xuedong Zhu

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 4,   Pages 450-460 doi: 10.1007/s11705-015-1542-2

Abstract: alkaline treatment on the physical properties of ZSM-5 catalysts and on their activities for methanol to aromaticsThe presence of mesopores gives the catalyst a longer lifetime and higher selectivity for aromatics.catalysts were washed with acid, some of the porosity was restored and a slight increase in selectivity for aromatics

Keywords： aromatics     ZSM-5     alkaline treatment     dealumination     desilication     mesopores     methanol    

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Unraveling Membrane Fouling Induced by Chlorinated Water Versus Surface Water: Biofouling Properties Article

Li Zhang, Lei Xu, Nigel Graham, Wenzheng Yu,

Engineering 2022, Volume 15, Issue 8,   Pages 154-164 doi: 10.1016/j.eng.2021.03.016

Abstract: As a pre-treatment during water treatment, it remains unclear whether chlorinated water can effectively

Keywords： Membrane fouling     Biofilm     GDM filtration technology     Ultrafiltration     Chlorine-resistant bacteria     Hydrophilicity    

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Microbial responses to combined oxidation and catalysis treatment of 1,4-dioxane and co-contaminants in groundwater and soil

Yu Miao, Nicholas W. Johnson, Kimberly Heck, Sujin Guo, Camilah D. Powell, Thien Phan, Phillip B. Gedalanga, David T. Adamson, Charles J. Newell, Michael S. Wong, Shaily Mahendra

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 5, doi: 10.1007/s11783-018-1071-6

Abstract:

Groundwater microbial community was altered after catalysis and chemical oxidation.

The coupled treatment train removed 90% 1,4-dioxane regardless of co-contaminants.

Dynamics of microbial populations varied along with different treatment stages.

Many microbial taxa exhibited resilience against oxidative and catalytic treatments.

Metagenomic analysis will be valuable for long-term management of polluted sites.

Keywords： Coupled treatments     Chlorinated solvents     Diethylene ether     Biological diversity     Microbial populations     Biomarkers    

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Title Author Date Type Operation

The influence of chlorinated aromatics' structure on their adsorption characteristics on activated carbon

Pengfei LIN,Yuan ZHANG,Xiaojian ZHANG,Chao CHEN,Yuefeng XIE,Irwin H SUFFET

Journal Article

Exergy and exergoeconomic analyses for integration of aromatics separation with aromatics upgrading

Journal Article

Microbial remediation of aromatics-contaminated soil

Ying Xu, Ning-Yi Zhou

Journal Article

Electrochemical reduction characteristics and the mechanism of chlorinated hydrocarbons at the copper

XU Wenying, GAO Tingyao, ZHOU Rongfeng, MA Lumin

Journal Article

Degradation of chlorinated phenols by nanoscale zero-valent iron

CHENG Rong, WANG Jianlong, ZHANG Weixian

Journal Article

Decomposition of aqueous chlorinated contaminants by UV irradiation with H

Eunsung KAN,Chang-Il KOH,Kyunghyuk LEE,Joonwun KANG

Journal Article

Fenton process for degradation of selected chlorinated aliphatic hydrocarbons exemplified by trichloroethylene

QIANG Zhimin, BEN Weiwei, HUANG Chin-Pao

Journal Article

Kinetics and mechanisms of reactions for hydrated electron with chlorinated benzenes in aqueous solution

Haixia YUAN,Huxiang PAN,Jin SHI,Hongjing LI,Wenbo DONG

Journal Article

microspheres prepared through a facile aerosol-based process for the simultaneous adsorption and reduction of chlorinated

Bhanukiran SUNKARA,Yang SU,Jingjing ZHAN,Jibao HE,Gary L. MCPHERSON,Vijay T. JOHN

Journal Article

Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

Journal Article

Co-conversion of methanol and

Shumei Wei, Yarong Xu, Zhaoyang Jin, Xuedong Zhu

Journal Article

The Progress and Application of the SKI Series Catalysts for Isomerization of C8 Aromatics

Qiao Yingbin

Journal Article

Alkaline modification of ZSM-5 catalysts for methanol aromatization: The effect of the alkaline concentration

Zhenhao Wei,Tengfei Xia,Minghui Liu,Qingsheng Cao,Yarong Xu,Kake Zhu,Xuedong Zhu

Journal Article

Unraveling Membrane Fouling Induced by Chlorinated Water Versus Surface Water: Biofouling Properties

Li Zhang, Lei Xu, Nigel Graham, Wenzheng Yu,

Journal Article

Microbial responses to combined oxidation and catalysis treatment of 1,4-dioxane and co-contaminants in groundwater and soil

Yu Miao, Nicholas W. Johnson, Kimberly Heck, Sujin Guo, Camilah D. Powell, Thien Phan, Phillip B. Gedalanga, David T. Adamson, Charles J. Newell, Michael S. Wong, Shaily Mahendra

Journal Article