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A supplementary assessment system of AQI-V for comprehensive management and control of air quality in chemical industrial parks

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Journal of Environmental Sciences 2023年第8期130卷 114-125页

作者： Qiaoli Wang Dongping Sheng chengzhi Wu Deji Jing Nana cheng Xingnong Cai Sujing Li Jingkai Zhao Wei Li jianmeng chen College of Environment Zhejiang University of TechnologyHangzhou 310032China Key Laboratory of Biomass Chemical Engineering of the Ministry of Education Institute of Industrial Ecology and EnvironmentCollege of Chemical and Biological EngineeringZhejiang University(Yuquan Campus)Hangzhou 310027China Trinity Consultants Inc.(China office)Hangzhou 310012China Zhejiang Ocean University ZhoushanZhejiang Province 316022China

Volatile organic compounds(VOCs)are the dominant pollutants in industrial parks.However,they are not generally considered as part of the air quality index(AQI)system,which leads to a biased assessment of pollution in industrial parks.In this study,a supplementary assessment system of AQI-V was established by analyzing VOCs characteristics with vehicle-mounted PTR-TOFMS instrument,correlation analysis and the standards analysis.Three hourly and daily scenarios were considered,and the hierarchical parameter setting was further optimized by field application.The hourly and daily assessments revealed the evaluation factors for the discriminability of different air quality levels,practiced value for regional air quality improvement,and the reservation of general dominant pollutants.Finally,the universality testing in ZPIP successfully recognized most of the peaks,with 54.76%,38.39%and 6.85%for O_(3),VOCs and NO_(2) as the dominant pollutant,and reflected the daily ambient air quality condition,togetherwith the dominant pollutant.The AQI-V systemwith VOCs sub-index is essential for air quality evaluation in industrial parks,which can further provide scientific support to control the pollution of VOCs and the secondary pollutant,therefore significantly improve the air quality in local industrial parks.

关键词： Air quality index Industrial parks,VOCs sub-index AQI-V system Scenario analysis

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Degradation of dichloromethane by an isolated strain Pandoraea pnomenusa and its performance in a biotrickling filter

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Journal of Environmental Sciences 2014年第5期26卷 1108-1117页

作者： Jianming Yu Wenji Cai Zhuowei cheng jianmeng chen Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Zhejiang University of Technology College of Biological and Environmental Engineering Zhejiang University of Technology

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℃, pH 7.3, and 0.66% NaC1. The growth and biodegradation processes were well fitted by Haldane＇s kinetic model, yielding maximum specific growth and degradation rates of 0.133 hr^-1 and 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 C1-/（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.

关键词： dichloromethane Pandoraea pnomenusa biodegradation characteristics removal performance carbon balance

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Removal characteristics and kinetic analysis of an aerobic vapor-phase bioreactor for hydrophobic alpha-pinene

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Journal of Environmental Sciences 2012年第8期24卷 1439-1448页

作者： Yifeng Jiang Shanshan Li Zhuowei cheng Runye Zhu jianmeng chen College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 China Engineering Research Center of the Ministry of Education for Bioconversion and Biopurification Zhefiang University of Technology Hangzhou 310032 China

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 start- up 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 ct-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 ct-pinene.

关键词： biofilters gaseous α-pinene removal characteristics microbial community kinetic parameters

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Kinetic analysis and bacterium metabolization of α-pinene by a novel identified Pseudomonas sp.strain

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Journal of Environmental Sciences 2012年第10期24卷 1806-1815页

作者： Zhuowei cheng Pengfei Sun Yifeng Jiang Lili Zhang jianmeng chen Engineering Research Center of the Ministry of Education for Bioconversion and Biopurificationm Zhejiang University of Technology Hangzhou 310032 China. College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 China

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 NaC1 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 Vraax and the half-saturation constant Km 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 catechol- 1,2-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.

关键词： Pseudomonas veronii ct-pinene growth conditions kinetics analysis metabolic pathway

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Conversion characteristics and mechanism analysis of gaseous dichloromethane degraded by a VUV light in different reaction media

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Journal of Environmental Sciences 2012年第10期24卷 1777-1784页

作者： Jianming Yu Wenji Cai jianmeng chen Li Feng Yifeng Jiang Zhuowei cheng .College of Biological and Environmental Engineering Zhefiang University of Technology Hangzhou 310032 China Environmental Science and Engineering Research Institute Zhefiang University of Technology Hangzhou 310032 China

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, O3 oxidation and HO. oxidation, DCM was ultimately mineralized into inorganic compounds （such as HC1, CO2, H20, 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/m3. 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.

关键词： dichloromethane VUV photodegradation mechanism carbon balance kinetic analysis

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Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods

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Journal of Environmental Sciences 2013年第12期25卷 2460-2468页

作者： Zhiqiao He Qiaolan Cai Huiying Fang Gaohua Situ Jianping Qiu Shuang Song jianmeng chen College of Biological and Environmental Engineering Zhejiang University of Technology

A series of TiO2 with different crystal phases and morphologies was synthesized via a facile hydrothermal process using titanium nbutoxide 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 diffraction 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 futile 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 effective separation of the photogenerated electron-hole pairs.

关键词： photocatalysis TiO2 anatase nanoparticles rutile nanoflowers simulated solar light illumination.

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Enzyme-electrolytic degradation of dichloromethane: Efficiency, kinetics and mechanism

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Journal of Environmental Sciences 2019年第12期31卷 187-194页

作者： Jianming Yu Meng Wu Yuwei Tang Jiaqi Shi Jun Hu Zhiliang Yu jianmeng chen College of Environment Zhejiang University of TechnologyHangzhou 310014China Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Hangzhou 310014China College of Biotechnology and Bioengineering Zhejiang University of TechnologyHangzhou 310014China

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.

关键词： Enzyme electrode Dichloromethane Kinetics Reductive dichlorination Reduced glutathione(GSH) regeneration

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A visible light-responsive iodine-doped titanium dioxide nanosphere

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Journal of Environmental Sciences 2011年第1期23卷 166-170页

作者： Zhiqiao He Liyong Zhan Fangyue Hong Shuang Song Zhengying Lin jianmeng chen Mantong Jin College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 China Department of Chemical Engineering Hangzhou Vocational & Technical College Hangzhou 310018 China

I-doped titanium dioxide nanospheres （I-TNSs） were synthesized via a two-step hydrothermal synthesis route, their potential for the efficient utilization of visible light was evaluated. The prepared anatase-phase I-TNSs had a bimodal porous size distribution with a Brunauer-Emmett-Teller surface area of 76 m2/g, a crystallite size of approximately 14 nm calculated from X-ray diffraction data, and a remarkable absorption in the visible light region at wavelengths 〉 400 nm. The photocatalytic activity of the samples was evaluated by decoloration of Methyl Orange in aqueous solution under visible light irradiation in comparison to the iodine-doped TiO2 （I-TiO2）. The I-TNSs showed higher photocatalytic efficiency compared with I-TiO2 after irradiation for 180 rain even though the latter had a much greater surface area （115 m2/g）. It was concluded that the surface area was not the predominant factor determining photocatalytic activity, and that the good crystallization and bimodal porous nanosphere structure were favourable for photocatalysis.

关键词： I-doped titanium dioxide nanospheres Methyl Orange visible light

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气升式藻-菌共生反应器去除氯苯及吸收CO_(2)性能研究

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实验技术与管理 2024年第5期41卷 38-45页

作者：孔宪旺陈昌文袁镇陆李超陈建孟陈东之浙江海洋大学浙江省石油化工环境污染控制重点实验室浙江舟山316022 浙江工业大学环境学院浙江杭州310014

CO_(2)是生物法处理有机废气过程中的主要副产物之一,对其进行有效吸收可实现废气治理减污降碳协同的目标。该文以氯苯为模型污染物,在气升式细菌反应器中添加蛋白核小球藻(C.pyrenoidosa),构建气升式藻-菌共生反应器,初步探究了藻-菌... 详细信息

CO_(2)是生物法处理有机废气过程中的主要副产物之一,对其进行有效吸收可实现废气治理减污降碳协同的目标。该文以氯苯为模型污染物,在气升式细菌反应器中添加蛋白核小球藻(C.pyrenoidosa),构建气升式藻-菌共生反应器,初步探究了藻-菌体系对废气去除、CO_(2)吸收、微生物群落结构等关键指标的影响。结果表明在不同停留时间和氯苯进口浓度条件下,气升式藻-菌共生反应器对氯苯的去除率超过90%,与气升式细菌反应器无明显差异,然而气升式藻-菌共生反应器的出口CO_(2)浓度显著低于气升式细菌反应器,75天的运行周期内CO_(2)累积排放量降低了约25%。

关键词：废气处理微藻生物降解碳减排

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基于电成像的孔洞型碳酸盐岩储层连通性评价

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测井技术 2024年第1期48卷 75-83,116页

作者：孙建孟程耀东何娟刘璋陈培元中国石油大学(华东)地球科学与技术学院山东青岛266580 中国海洋石油国际有限公司海外技术支持中心北京100028

碳酸盐岩储层非均质性强,孔隙结构复杂,相较于常规碎屑岩储层,其孔隙度、渗透率关系的规律及特征不明显。碳酸盐岩储层的连通性与孔洞特征具有强相关性,且连通性是影响储层渗透率的重要因素,因此,对碳酸盐岩孔洞连通性的评价是孔洞型碳... 详细信息

碳酸盐岩储层非均质性强,孔隙结构复杂,相较于常规碎屑岩储层,其孔隙度、渗透率关系的规律及特征不明显。碳酸盐岩储层的连通性与孔洞特征具有强相关性,且连通性是影响储层渗透率的重要因素,因此,对碳酸盐岩孔洞连通性的评价是孔洞型碳酸盐岩储层评价的关键问题。以伊拉克东南部B油田FQ-1井M组MB21亚油组孔洞型碳酸盐岩储层为例,基于地层微电阻率扫描成像(FMI)测井的高分辨率动态图像,利用最大类间方差算法(OTSU)进行二次迭代分割,识别电成像图像孔洞;根据8连通域标记法标记连通孔洞;提取每个连通孔洞的特征孔径、内部最长通道距离、内部最长通道与水平方向夹角、平均通道宽度这4个几何参数,最终构建孔洞型碳酸盐岩储层连通指数。连通指数在伊拉克东南部B油田FQ-1井M组MB21亚油组孔洞型碳酸盐岩储层的应用表明,利用此方法建立的连通指数与FQ-1井碳酸盐岩储层岩心渗透率相关系数达0.8437,并且连通指数曲线的趋势符合岩心渗透率在储层不同深度的分布情况,证明了连通指数可以指示储层孔隙结构较好、溶蚀孔洞发育的深度段,并可以划分储层中连通性较好的深度区间,该参数对于寻找碳酸盐岩储层渗透层具有重要意义。

关键词：孔洞型碳酸盐岩连通指数电成像测井孔洞识别连通域标记

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