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| 1 | Optimizing aerobic biodegradation of dichloromethane using response surface methodology显示文摘Response surface methodology(RSM) was employed to evaluate the optimum aerobic biodegradation of dichloromethane(DCM) in pure culture.The parameters investigated include the initial DCM concentration,glucose as an inducer and hydrogen peroxide as terminal electron acceptor(TEA) .Maximum aerobic biodegradation effciency was predicted to occur when the initial DCM concentration was 380 mg/L,glucose 13.72 mg/L,and H2O2 115 mg/L.Under these conditions the aerobic biodegradation rate reached up to 93.18%,which was significantly higher than that obtained under original conditions.Without addition of glucose,degradation effciencies were 80%at DCM concentrations<326 mg/L.When concentrations of DCM were more than 480 mg/L,the addition of hydrogen peroxide did not help to significantly increase DCM degradation effciency.When DCM concentrations increased from 240 to 480 mg/L,the overall DCM degradation effciency decreased from 91%to 60%in the presence of H2O2 for 120 mg/L. | WU Shijin,YU Xiang,HU Zhihang,ZHANG Lili,CHEN Jianmeng College of Biological and Environmental Engineering,Zhejiang University of Technology,Hangzhou 310032,China | 2009 | Journal of Environmental Sciences2009，21，9： | 13 |
| 2 | Chlorobenzene degradation by electro-heterogeneous catalysis in aqueous solution:intermediates and reaction mechanism显示文摘This study was performed to investigate the variables that influence chlorobenzene (CB) degradation in aqueous solution by electro-heterogeneous catalysis.The effects of current density,pH,and electrolyte concentration on CB degradation were determined.The degradation effciency of CB was almost 100% with an initial CB concentration of 50 mg/L,current density 15 mA/cm2,initial pH 10,electrolyte concentration 0.1 mol/L,and temperature 25°C after 90 min of reaction.Under the same conditions,the degradation effciency of CB was only 51% by electrochemical (EC) process,which showed that electro-heterogeneous catalysis was more effcient than EC alone.The analysis results of Purge-and-Trap chromatography-mass spectrometry (P&T/GC/MS) and ion chromatography (IC) indicated that in the reaction process,the initial .OH attack could occur at the C-Cl bond of CB,yielding phenol and biphenyl with the release of Cl-.Further oxidation of phenol and biphenyl produced ρ-Vinylbenzoic acid and hydroquinol.Finally,the compounds were oxidized to butenedioic acid and other small-molecule acids. | Jiade WANG Jianmeng CHEN | 2008 | Journal of Environmental Sciences2008，20，11： | 10 |
| 3 | Efficient degradation of chlorobenzene in a non-thermal plasma catalytic reactor supported on CeO_2/HZSM-5 catalysts显示文摘Chlorobenzene removal was investigated in a non-thermal plasma reactor using CeO_2/HZSM-5catalysts.The performance of catalysts was evaluated in terms of removal and energy efficiency.The decomposition products of chlorobenzene were analyzed.The results show that CeO_2/HZSM-5 exhibited a good catalytic activity,which resulted in enhancements of chlorobenzene removal,energy efficiency,and the formation of lower amounts of by-products.With regards to CO_2 selectivity,the presence of catalysts favors the oxidation of by-products,leading to a higher CO_2 selectivity.With respect to ozone,which is considered as an unavoidable by-product in air plasma reactors,a noticeable decrease in its concentration was observed in the presence of catalysts.Furthermore,the stability of the catalyst was investigated by analyzing the evolution of conversion in time.The experiment results indicated that CeO_2/HZSM-5 catalysts have excellent stability:chlorobenzene conversion only decreased from 78%to 60%after 75 hr,which means that the CeO_2/HZSM-5 suffered a slight deactivation.Some organic compounds and chlorinated intermediates were adsorbed or deposited on the catalysts surface as shown by the results of Fourier Transform Infrared(FT-IR) spectroscopy,scanning electron microscope(SEM) and energy dispersive X-ray spectroscopy(EDS) analyses of the catalyst before and after the reaction,revealing the cause of catalyst deactivation. | Liying Jiang Guofeng Nie Runye Zhu Jiade Wang Jianmeng Chen Yubo Mao Zhuowei Cheng Willam A.Anderson | 2017 | Journal of Environmental Sciences2017，29，5： | 8 |
| 4 | Sensitivity of green and blue-green algae to methyl tert-butyl ether显示文摘The toxicity of methyl tert-butyl ether (MTBE) to Chlorella ellipsoidea and Aphanizomenon flos-aquae was tested and assessed for a 15-d incubation with concentrations of MTBE from high (2.00×104 mg/L) to low (2 mg/L). The results showed that the toxicity was low when the concentration of MTBE was in the range 1.00×104-2.00×104 mg/L (the greatest inhibition of growth-rate was 70%-71%, occurred during the day 1-5). Low concentrations (2-500 mg/L) stimulated algal growth up to the greatest effect of 85%-200% when the concentration of MTBE was 50-100 mg/L during day 3-5. The toxicity of MTBE (72-120 h EC50) was 6.65×103-9.58×103 mg/L for C. ellipsoidea and that is 1.14×104-2.00×104 mg/L for A. floc-aquae. We found that the toxicity and ecological risk of MTBE for the algal community structure were low and the toxicity was influenced by the duration time of the test. | CHEN Jianmeng MA Jianyi CAO Wei WANG Pinwei TONG Senmiao SUN Yizhao | 2009 | Journal of Environmental Sciences2009，21，4： | 5 |
| 5 | Pollutant toxicology with respect to microalgae and cyanobacteria显示文摘Microalgae and cyanobacteria are fundamental components of aquatic ecosystems.Pollution in aquatic environment is a worldwide problem.Toxicological research on microalgae and cyanobacteria can help to establish a solid foundation for aquatic ecotoxicological assessments.Algae and cyanobacteria occupy a large proportion of the biomass in aquatic environments;thus,their toxicological responses have been investigated extensively.However,the depth of toxic mechanisms and breadth of toxicological investigations need to be improved.While existing pollutants are being discharged into the environment daily,new ones are also being produced continuously.As a result,the phenomenon of water pollution has become unprecedentedly complex.In this review,we summarize the latest findings on five kinds of aquatic pollutants,namely,metals,nanomaterials,pesticides,pharmaceutical and personal care products(PPCPs),and persistent organic pollutants(POPs).Further,we present information on emerging pollutants such as graphene,microplastics,and ionic liquids.Efforts in studying the toxicological effects of pollutants on microalgae and cyanobacteria must be increased in order to better predict the potential risks posed by these materials to aquatic ecosystems as well as human health. | Tao Lu Qi Zhang Zhenyan Zhang Baolan Hu Jianmeng Chen Jun Chen Haifeng Qian | 2021 | Journal of Environmental Sciences2021，33，1： | 4 |
| 6 | Conversion characteristics and mechanism analysis of gaseous dichloromethane degraded by a VUV light in different reaction media显示文摘The photodegradation of gaseous dichloromethane(DCM) by a vacuum ultraviolet(VUV) light in a spiral reactor was investigated with different reaction media and initial concentrations.Through the combination of direct photolysis,O 3 oxidation and HO· oxidation,DCM was ultimately mineralized into inorganic compounds(such as HCl,CO 2,H 2 O,etc.) in the air with relative humidity(RH) of 75%-85%.During the photodegradation process,some small organic acids(including formic acid,acetic acid) were also detected and the intermediates were more soluble than DCM,providing a possibility for its combination with subsequent biodegradation.Based on the detected intermediates and the confirmed radicals,a photodegradation pathway of DCM by VUV was proposed.With RH 75%-80% air as the reaction medium,the DCM removal followed the second-order kinetic model at inlet concentration of 100-1000 mg/m 3.Kinetic analysis showed that the reaction media affected the kinetic constants of DCM conversion by a large extent,and RH 80% air could cause a much lower half-life for its conversion.Such results supported the possibility that VUV photodegradation could be used not only for the mineralization of DCM but also as a pretreatment before biodegradation. | Jianming Yu Wenji Cai Jianmeng Chen Li Feng Yifeng Jiang Zhuowei Cheng | 2012 | Journal of Environmental Sciences2012，24，10： | 4 |
| 7 | Synthesis,characterization,and photocatalytic activity of porous La–N–co-doped TiO_2 nanotubes for gaseous chlorobenzene oxidation显示文摘The photocatalytic oxidation of gaseous chlorobenzene(CB) by the 365 nm-induced photocatalyst La/N–Ti O2, synthesized via a sol–gel and hydrothermal method, was evaluated. Response surface methodology(RSM) was used to model and optimize the conditions for synthesis of the photocatalyst. The optimal photocatalyst was 1.2La/0.5N–Ti O2(0.5) and the effects of La/N on crystalline structure, particle morphology, surface element content, and other structural characteristics were investigated by XRD(X-ray diffraction), TEM(Transmission Electron Microscopy), FTIR(Fourier transform infrared spectroscopy), UV–vis(Ultraviolet–visible spectroscopy), and BET(Brunauer Emmett Teller). Greater surface area and smaller particle size were produced with the co-doped Ti O2 nanotubes than with reference Ti O2. The removal of CB was effective when performed using the synthesized photocatalyst,though it was less efficient at higher initial CB concentrations. Various modified Langmuir-Hinshelwood kinetic models involving the adsorption of chlorobenzene and water on different active sites were evaluated. Fitting results suggested that competitive adsorption caused by water molecules could not be neglected, especially for environments with high relative humidity. The reaction intermediates found after GC–MS(Gas chromatography–mass spectrometry) analysis indicated that most were soluble, low-toxicity, or both. The results demonstrated that the prepared photocatalyst had high activity for VOC(volatile organic compounds) conversion and may be used as a pretreatment prior to biopurification. | Zhuowei Cheng Zhiqi Gu Jianmeng Chen Jianming Yu Lingjun Zhou | 2016 | Journal of Environmental Sciences2016，28，8： | 4 |
| 8 | Enzyme-electrolytic degradation of dichloromethane: Efficiency, kinetics and mechanism显示文摘Enzymatic electrolysis cell(EEC)has advantages over microbial electrolysis cell(MEC)due to the needless of microbe inoculation and high-efficiency of enzymatic reaction.In this study,an EEC was first applied to achieve the effective degradation of halogenated organic pollutants and dichloromethane(CH2Cl2)was utilized as a model pollutant.The results indicate that the degradation efficiency of CH2Cl2 after 2 hr reaction in the EEC was almost100%,which was significantly higher than that with enzyme(51.1%)or current(19.0%).The current induced the continuous regeneration of reduced glutathione(GSH),thus CH2Cl2 was degraded under the catalysis of GSH-dependent dehalogenase through stepwise dechlorination,and successively formed monochloromethane(CH3Cl)and methane(CH4).The kinetic result shows that with a current of 15 mA,the maximum specific degradation rate of CH2Cl2(3.77×10-3 hr-1)was increased by 5.7 times.The optimum condition for CH2Cl2 dechlorination was also obtained with pH,current and temperature of 7.0,15 mA and 35°C,respectively.Importantly,this study helps to understand the behavior of enzymes and the fate of halogenated organic pollutants with EEC,providing a possible treatment technology for halogenated organic pollutants. | Jianming Yu Meng Wu Yuwei Tang Jiaqi Shi Jun Hu Zhiliang Yu Jianmeng Chen | 2019 | Journal of Environmental Sciences2019，31，12： | 3 |
| 9 | Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods显示文摘A series of TiO2 with diferent crystal phases and morphologies was synthesized via a facile hydrothermal process using titanium n- butoxide and concentrated hydrochloric acid as raw materials. The photocatalytic activity of the samples was evaluated by degradation of Methyl Orange in aqueous solution under UV-Visible light irradiation. On the basis of detailed analysis of the characterizing results of high-resolution transmission electron microscopy, X-ray powder difraction measurements, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurement, it was concluded that the photo-activity of the catalyst is related directly to the 3D morphology and the crystal phase composition. An excellent catalyst should have both a rutile 3D flower-like structure and anatase granulous particles. The 3D flower-like structure could enhance light harvesting, as well as the transfer of reactant molecules from bulk solution to the reactive sites on TiO2. In addition, the optimum anatase/rutile phase ratio was found to be 80:20, which is beneficial to the efective separation of the photogenerated electron–hole pairs. | Zhiqiao He Qiaolan Cai Huiying Fang Gaohua Situ Jianping Qiu Shuang Song Jianmeng Chen | 2013 | Journal of Environmental Sciences2013，25，12： | 3 |
| 10 | Kinetic analysis and bacterium metabolization of α-pinene by a novel identified Pseudomonas sp.strain显示文摘Biodegradation has become a popular alternative remediation technology for its economic and ecological advantages.An aerobic bacterium(strain ZW) capable of degrading α-pinene was isolated from a biofilter by a selective enrichment.Based on the 16S rRNA gene analysis and physiochemical properties,this strain was identified as Pseudomonas veronii.Under the optimized condition achieved by the response surface methodology(RSM),as well as pH 6.82,temperature 26.3℃ and NaCl concentration 1.36%,almost 100% α-pinene could be removed within 45 hr.Enzymatic biodegradation by the crude intracellular enzyme could be described well by the Michaelis-Menten model in which the maximum degradation rate V max and the half-saturation constant K m were calculated to be 0.431 mmol/(L·min) and 0.169 mmol/L,respectively.Activity assay of catechol suggested that the strain ZW possessed a catechol1,2-dioxygenase and could decompose benzene-ring through ortho ring cleavage.Based on the identified intermediates by GC/MS,a new metabolic pathway was proposed,in which the final metabolites were some simpler organic and inorganic compounds.The present work demonstrated that the strain ZW would have a great application prospect for the remediation of α-pinene-contaminated environment. | Zhuowei Cheng Pengfei Sun Yifeng Jiang Lili Zhang Jianmeng Chen | 2012 | Journal of Environmental Sciences2012，24，10： | 3 |
| 11 | Degradation of dichloromethane by an isolated strain Pandoraea pnomenusa and its performance in a biotrickling filter显示文摘A strain Pandoraea pnomenusa LX-1 that uses dichloromethane(DCM) as sole carbon and energy source has been isolated and identified in our laboratory. The optimum aerobic biodegradation of DCM in batch culture was evaluated by response surface methodology. Maximum biodegradation(5.35 mg/(L·hr)) was achieved under cultivation at 32.8°C, pH 7.3, and 0.66% NaCl. The growth and biodegradation processes were well fitted by Haldane's kinetic model, yielding maximum specific growth and degradation rates of 0.133 hr-1and 0.856 hr-1, respectively. The microorganism efficiently degraded a mixture of DCM and coexisting components(benzene, toluene and chlorobenzene). The carbon recovery(52.80%–94.59%) indicated that the targets were predominantly mineralized and incorporated into cell materials. Electron acceptors increased the DCM biodegradation rate in the following order: mixed > oxygen > iron > sulfate > nitrate. The highest dechlorination rate was 0.365 mg Cl-/(hr·mg biomass), obtained in the presence of mixed electron acceptors. Removal was achieved in a continuous biotrickling filter at 56%–85% efficiency, with a mineralization rate of 75.2%. Molecular biology techniques revealed the predominant strain as P. pnomenusa LX-1. These results clearly demonstrated the effectiveness of strain LX-1 in treating DCM-containing industrial effluents. As such, the strain is a strong candidate for remediation of DCM coexisting with other organic compounds. | Jianming Yu Wenji Cai Zhuowei Cheng Jianmeng Chen | 2014 | Journal of Environmental Sciences2014，26，5： | 2 |
| 12 | Removal characteristics and kinetic analysis of an aerobic vapor-phase bioreactor for hydrophobic alpha-pinene显示文摘Biofiltration is considered an effective method to control volatile organic compounds(VOCs) pollution.This study was conducted to evaluate the potential use of a bacterial biofilter packed with wood chips and peat for the removal of hydrophobic α-pinene.When inoculated with two pure degraders and adapted activated sludge,a removal efficiency(RE) of more than 95% was achieved after a startup period of 11 days.The maximum elimination capacity(EC) of 50 g/(m 3 ·hr) with RE of 94% was obtained at empty bed retention time(EBRT) of 102 sec.When higher α-pinene concentrations and shorter EBRTs were applied,the REs and ECs decreased significantly due to mass-transfer and biological reaction limitations.As deduced from the experimental results,approximately 74% of α-pinene were completely mineralized by the consortiums and the biomass yield was 0.60 g biomass/g α-pinene.Sequence analysis of the selected bands excised from denaturing gradient gel electrophoresis revealed that the inoculated pure cultures could be present during the whole operation,and others were closely related to bacteria being able to degrade hydrocarbons.The kinetic results demonstrated that the whole biofiltration for α-pinene was diffusion-limit controlled owing to its hydrophobic characteristics.These findings indicated that this bacterial biofiltration is a promising technology for the remediation of hydrophobic industrial waste gases containing α-pinene. | Yifeng Jiang Shanshan Li Zhuowei Cheng Runye Zhu Jianmeng Chen | 2012 | Journal of Environmental Sciences2012，24，8： | 2 |
| 13 | Mechanism and kinetics of 2-chlorophenol decomposition using coupled ultrasound and electrocatalysis显示文摘A coupled ultrasound/electrocatalysis(US/EC) process was used to enhance the decomposition effi-ciency of organics.The synergetic kinetics and the mechanism of 2-chlorophenol(2-CP) decomposi-tion with coupled US/EC were studied.It was found that in a US/EC process 2-CP is attacked by active radicals(such as hydroxyl radicals) to form 2-chloro-p-benzoquinone,and the latter is oxidized to simple organic acids when the ring is opened.The enhancement factor expressed by the apparent rate constant of 2-CP decomposition with coupled US/EC is 1.324 at a current density of 20 mA·cm-2,an ultrasonic frequency of 20 kHz,an ultrasonic intensity of 0.27 W·cm-2,and a 2-CP initial concentration of 200 mg·L-1,which means that a synergetic effect exists.A model derived from Langmuir adsorption theory of solid surface and reaction kinetics equations can describe exactly the decomposition of 2-CP with coupled US/EC.The numerical values are in good agreement with the experimental data.The model parameters are associated with reaction conditions. | WANG JiaDe ZHU RunYe CHEN Xia CHEN JianMeng | 2008 | Science China Chemistry2008，51，6： | 2 |
| 14 | Enhancement of methyl tert -butyl ether degradation by the addition of readily metabolizable organic substrates显示文摘 | Dongzhi Chen Jianmeng Chen Weihong Zhong | 2009 | Journal of Hazardous Materials2009，，1： | 1 |
| 15 | Degradation of methyl tert-butyl ether by gel immobilized MethyliBium petroleiphilum PM1 显示文摘 | Chen Dongzhi Chen Jianmeng Zhong Weihong | 2008 | Bioresource Technology2008，99，： | 1 |
| 16 | Denitrification removal of nitric oxide in a rotating drum biofilter显示文摘 | Jiade Wang Chengqiang Wu Jianmeng Chen Haijie Zhang | 2006 | Chemical Engineering Journal2006，，1： | 1 |
| 17 | Bortezomib induction of C/EBP显示文摘 | Courtney M Shirley Jianmeng Chen Meir Shamay | 2011 | Blood2011，117，23： | 1 |
| 18 | US/O3 combination degradation of aniline in aqueous solution 显示文摘 | Song Shuang He Zhiqiao Chen Jianmeng | 2007 | Ultrasonics Sonochemistry2007，14，1： | 1 |
| 19 | Degradation of methyl tert-butyl ether by gel immobilized Methylibium petroleiphilum PM1显示文摘 | Chen Dongzhi Chen Jianmeng Zhong Weihong | 2008 | Bioresource Technology2008，99，11： | 1 |
| 20 | Increasing the catalytic activities of iodine doped titanium dioxide by modifying with tin dioxide for the photodegradation of 2-chlorophenol under visible light irradiation显示文摘 | Zhiqiao He Cheng Wang Hongyu Wang Fangyue Hong Xinhua Xu Jianmeng Chen Shuang Song | 2011 | Journal of Hazardous Materials2011，，1： | 1 |
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