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Interaction of DNA with aromatic hydrocarbons fraction in atmospheric particulates of Xigu District of lanzhou,China

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Journal of environmental Sciences 2007年第8期19卷 948-954页

作者： GAO Hong MA Min-quan ZHOU Lei JIA Run-ping CHEN Xing-guo HU Zhi-de Key Laboratory of Western China＇s environmental Systems （Ministry of Education） College of Earth and Environment Sciences Lanzhou University Lanzhou 730000 China. lanzhou environmental monitoring station Lanzhou 730000 China Department of Chemistry Lanzhou University. Lanzhou 730000 China

Voluminously epidemiological studies show that the relationships exist between the air pollution and human health and cancer. Aromatic hydrocarbons （AHs） in air form a large class of organic pollutants, which are widely in environment and many of them are known to be carcinogenic and/or mutagenic and contribute to ambient air pollution. In the past decades, bioassays mainly have been used to evaluate the toxicity of chemical mixtures in atmospheric particulates or aqueous environment. However, it is well known that the covalent complexes formed by carcinogens with DNA may be exert negative results in bioassay. So the main aim of this paper is to develop an evaluation method of toxicity effects of chemical mixtures in atmospheric particulates from chemical standpoint. In this study, the in vitro interaction of the AHs with DNA was investigated by absorption, fluorescence and resonance light scattering （RLS） spectroscopic techniques. The results showed that the AHs in the atmospheric particulates could combine with calf thymus DNA （ctDNA） and herring sperm DNA （hsDNA） without being activated or metabolized by organism, respectively. Intercalation may be present in the mechanism of interaction. The binding constants of the AHs with ctDNA and hsDNA were 2.5x102 and 2.0x103, respectively, which indicated that the interaction of the AHs with hsDNA is stronger than that with ctDNA. In addition, the relationships of dose-effect between the total mole concentration of chemical components and the ability of binding ctDNA and hsDNA were confirmed. This research made it possible to study the toxicity effects of chemical mixtures in atmospheric particulates by chemical method. It is believed that the composition and contents of unknown AHs and the interaction of DNA with AHs in atmospheric particulates of Xigu District of lanzhou City, China are first reported in the past twenty years.

关键词： atmospheric particulates aromatic hydrocarbons fraction interaction with DNA

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Structural Modal Parameter Recognition and Related Damage Identification Methods under environmental Excitations: A Review

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Structural Durability & Health monitoring 2025年第1期19卷 25-54页

作者： Chao Zhang Shang-Xi Lai Hua-Ping Wang School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou730000China Key Laboratory of Special Functional Materials and Structural Design Ministry of EducationLanzhou UniversityLanzhou730000China

Modal parameters can accurately characterize the structural dynamic properties and assess the physical state of the ***,it is particularly signiﬁcant to identify the structural modal parameters according to the monitoring data information in the structural health monitoring(SHM)system,so as to provide a scientiﬁc basis for structural damage identiﬁcation and dynamic model modiﬁ*** view of this,this paper reviews methods for identifying structural modal parameters under environmental excitation and brieﬂy describes how to identify structural damages based on the derived modal *** paper primarily introduces data-driven modal parameter recognition methods(e.g.,time-domain,frequency-domain,and time-frequency-domain methods,etc.),brieﬂy describes damage identiﬁcation methods based on the variations of modal parameters(e.g.,natural frequency,modal shapes,and curvature modal shapes,etc.)and modal validation methods(e.g.,Stability Diagram and Modal Assurance Criterion,etc.).The current status of the application of artiﬁcial intelligence(AI)methods in the direction of modal parameter recognition and damage identiﬁcation is further *** on the pre-vious analysis,the main development trends of structural modal parameter recognition and damage identiﬁcation methods are given to provide scientiﬁc references for the optimized design and functional upgrading of SHM systems.

关键词： Structural health monitoring data information modal parameters damage identiﬁcation AI method

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Oxidative removal of acetaminophen using zero valent aluminum-acid system:Efficacy,influencing factors,and reaction mechanism

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Journal of environmental Sciences 2012年第2期24卷 314-319页

作者： HonghuaZhang Beipei Cao Wanpeng Liu Kunde Lin Jun Feng College of Biological and environmental Engineering Zhejiang University of Technology Hangzhou 310032 China Shangyu environmental monitoring station Shaoxing 312300 China

Commercial available zero valent aluminum under air-equilibrated acidic conditions（ZVAl/H＋/air system） demonstrated an excellent capacity to remove aqueous organic ***（ACTM）,the active ingredient of the over-the-counter drug Tylenol？,is widely present in the aquatic environment and therefore the treatment of ACTM-contaminated water calls for further *** we investigated the oxidative removal of ACTM by ZVAl/H＋/air system and the reaction *** acidic solutions（pH 3.5）,ZVAl displayed an excellent capacity to remove *** than 99% of ACTM was eliminated within 16 hr in pH 1.5 reaction solutions initially containing 2.0 g/L aluminum and 2.0 mg/L ACTM at 25 ± 1℃.Higher temperature and lower pH facilitated ACTM *** addition of different iron species Fe0,Fe2＋ and Fe3＋ into ZVAl/H＋/air system dramatically accelerated the reaction likely due to the enhancing transformation of H2O2 to *** Fenton＇s ***,the primary intermediate hydroquinone and the anions formate,acetate and nitrate,were identified and a possible reaction scheme was *** work suggested that ZVAl/H＋/air system may be potentially employed to treat ACTM-contaminated water.

关键词： acetaminophen advanced oxidation processes(AOPs) aluminum Fenton reaction

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Prediction of Infinite Dilution Activity Coefficients of Alcohol and Ether Organic Compounds in Water

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Chinese Journal of Structural Chemistry 2010年第12期29卷 1808-1813页

作者：王维许惠英 Zhenhai environmental monitoring station College of Biology & Environment Engineering Zhejiang Shuren University

Based on QSPR of alcohol and ether organic compounds in water,geometrical optimization and electrostatic potential calculations were performed at the HF/6-31G＊ level for 73 alcohol and ether organic *** relationships between infinite dilution activity coef-ficient（lnγ∞） of alcohols and ethers in water and theoretical descriptors of the molecular structure were established by multiple regression *** result shows that the parameters derived from molecular electrostatic potential together with molecular surface area can be preferably used to express the quantitative structure-lnγ∞ relationship of alcohols and ethers in *** reveals that this model has good predictive capabilities（RCV=0.969）.The molecular electrostatic potential has also been proved to have the general applicability in QSPR model of alcohol and ether organic compounds about γ∞ in *** QSPR model established may provide a new powerful method for predicting γ∞ of organic compounds in aqueous systems.

关键词： alcohol and ether organic compounds infinite dilution activity coefficient(γ∞) molecular electrostatic potential QSPR

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Catalytic effect of activated carbon on bioleaching of low-grade primary copper sulfide ores

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中国有色金属学会会刊：英文版 2007年第5期17卷 1123-1127页

作者：张卫民谷士飞 School of Civil and environmental Engineering East China Institute of Technology Geological environmental monitoring station of Guangxi Zhuangzu Autonomous Region

The catalytic effect of activated carbon on the bioleaching of low-grade primary copper sulfide ores using mixture of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans was investigated. The results show that the addition of activated carbon can greatly accelerate the rate and efficiency of copper dissolution from low-grade primary copper sulfide ores. The solution with the concentration of 3.0 g/L activated carbon is most beneficial to the dissolution of copper. The resting time of the mixture of activated carbon and ores has an impact on the bioleaching of low-grade primary copper sulfide ores. The 2 d resting time is most favorable to the dissolution of copper. The enhanced dissolution rate and efficiency of copper can be attributed to the galvanic interaction between activated carbon and chalcopyrite. The addition of activated carbon obviously depresses the dissolution of iron and the bacterial oxidation of ferrous ions in solution. The lower redox potentials are more favorable to the copper dissolution than the higher potentials for low-grade primary copper sulfide ores in the presence of activated carbon.

关键词：生物滤化低等级硫化物催化反应碳元素

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Effect of Antimony on Physiological Responses of Green Chinese Cabbage and Enzyme Activities of Allitic Udic Ferrisols

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Pedosphere 2015年第1期25卷 124-129页

作者： XIAO Xi-Yuan GUO Zhao-Hui LUO Yue-Ping BI Jun-Ping YANG Miao HUANG Dong-Qin Institute of environmental Engineering School of Metallurgy and Environment Central South University environmental monitoring Center station of Hunan Province State environmental Protection Key Laboratory of Heavy Metal Pollution monitoring

High concentrations of antimony(Sb) in soils and vegetables can cause potential health risk. However, the effect of Sb on the growth and response of crops are not well known and to date, there is still no Sb limit standard for Allitic Udic Ferrisols in China. In this study, a greenhouse experiment was carried out to investigate the effect of antimony(Sb) on biomass, physiological performances,and macro- and micronutrient element concentrations of green Chinese cabbage(Brassica chinensis L.), as well as enzyme activities,in Allitic Udic Ferrisols from Hunan Province, China. Antimony was supplied at rates of 0(control), 2, 5, 10, 20, and 50 mg kg-1and thus with the background value of 1.0 mg kg-1, the Sb concentrations in the treated soil samples were 1, 3, 6, 11 21, and 51 mg kg-1, respectively. The results showed the leaf biomass and ascorbic acid content of cabbage significantly(P < 0.05) decreased by 30.6% and 48.3%, respectively, and soil urease and dehydrogenase activities also significantly(P < 0.05) decreased by 33.6%and 32.5%, respectively, when soil Sb concentration was 21 mg kg-1as compared with the control. The uptake of essential nutrient elements such as Mg, Cu, and Zn by cabbage was obviously affected, while the leaf soluble sugar content slightly changed when the soil Sb concentration exceeded 21 mg kg-1. Based on cabbage physiological responses and soil enzyme activities, the permissible concentration of 21 mg kg-1for Sb in Allitic Udic Ferrisols should be recommended.

关键词： ascorbic acid biomass dehydrogenase nutrient elements permissible Sb concentration soluble sugar urease

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Recent development of a refined multiple air pollutant emission inventory of vehicles in the Central Plains of China

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Journal of environmental Sciences 2019年第10期31卷 80-96页

作者： Xingke Gu Shasha Yin Xuan Lu Huan Zhang Lingling Wang Ling Bai Chen Wang Ruiqin Zhang Minghao Yuan Research Institute of environmental Science College of Chemistry and Molecular Engineering Zhengzhou University Zhengzhou 450001China Henan environmental monitoring Center Zhengzhou 450004 China environmental Protection monitoring Center station of Zhengzhou Zhengzhou 450007 China

Central Plains region of China,represented by Henan Province,is facing serious air pollution *** exhaust emissions had adverse impacts on the atmospheric *** first comprehensive and novel vehicle emission inventory for Henan Province using vehicle kilometers traveled,localized emission factors,and activity data at city-level was ***,3 km×3 km gridded emission and temporal variations were determined by using localized *** show that the total emissions of sulfur dioxide(SO2),nitrogen oxides(NOx),carbon monoxide(CO),particular matter with aerodynamic diameter<10μm(PM10),aerodynamic diameter<2.5μm(PM2.5),volatile organic compounds(VOCs),VOCs-evaporation and ammonia in 2015 were 9.1,533.4,1190.7,23.7,21.6,150.8,31.5 and 10.4 Gg,respectively,and the emission intensities of the above pollutants were 0.05,2.7,6.0,0.1,0.1,0.8,0.2 and 0.05 g/km,*** meeting the Primary China 1,China 3 and China 4 contributed 89.1%,82.7%,75.3%,75.5%,75.5%,68.2%,68.4%and 82.3%for SO2,NOx,CO,PM10,PM2.5,VOCs,VOCs-evaporation and ammonia emissions,***,Zhoukou,Nanyang,Luoyang,Shangqiu and Xinyang showed relatively higher emissions and contributed more than 50%of each *** spatial distribution indicated obvious characteristics of the road network,and high-level emission was concentrated in the downtown ***,the ozone formation potential(OFP)based on the estimated speciated VOC emissions was 569.6 Gg in Henan *** and aromatic hydrocarbons were the main species of VOCs,whereas olefins contributed the largest proportion of OFP,with 42.2%.

关键词： Vehicle Emission standard Gridded allocation Ozone formation potential Speciated volatile organic compounds

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Variation of PM_(2.5) concentration in Hangzhou,China

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Particuology 2013年第1期11卷 55-62页

作者： Shengmao Hong Li Jiao Wanli Ma Environment Science Hangzhou Central Station for Environmental Monitoring Hangzhou Bureau of Meteorology

This observational study investigates the variation of PM2.5 concentration and its ratio against PM10 concentration under different weather systems and pollution types. The study was conducted in Hangzhou on east China＇s Yangtze River Delta using data collected at seven ambient air quality monitoring stations around the metropolitan area between 2006 and 2008 and using weather information in the same period. Nine predominant weather systems affecting the city were classified through careful analysis of the 11- year surface and upper air weather charts from 1996 to 2006. Each observational day was then assigned to one of the nine weather systems. It was found that the PM2.5 concentration varied greatly for different weather systems, with the highest PM2.5 concentration associated with the post-cold-frontal system at 0.091 mg/m^3 and the lowest PM2.5 concentration with the easterlies system at 0.038 mg/m^3, although the PM2.5/PM10 ratio remained consistently above 0.5 for all systems. The post-cold-frontal system typically occurs in autumn and winter while the easterlies system is more a summer phenomenon. Among all types of pollution, the highest PM2.5 concentration of 0.117 mg/m^3 coincided with the large-scale continuous pollution events, suggesting that this type of pollution was more conducive to the formation of secondary particulate matters. The ratio of PM2.5/PM10 was above 0.5 in non-pollution days and all pollution types but one under the influence of dust storms when the ratio decreased to 0.3 or less. The outcomes of this study could be used to develop a rudimental predictive model of PM2.5 concentration based on weather system and pollution type.

关键词： PM2.5 Concentration Weather system Secondary particulate matter Post-cold-frontal Large-scale continuous pollution

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Terrestrial input and nutrient change reflected by sediment records of the Changjiang River Estuary in recent 80 years

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Acta Oceanologica Sinica 2015年第2期34卷 27-35页

作者： LI Junlong ZHENG Binghui HU Xupeng WANG Yiming DING Ye LIU Fang College of Water Sciences Beijing Normal University State Key Laboratory of environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences State environmental Protection Key Laboratory of Quality Control in environmental monitoring China National Environmental Monitoring Center Zhoushan Marine Ecological environmental monitoring station

A variety of environmental problems have been observed in the Changjiang River Estuary and adjacent coastal area, including eutrophication, harmful algal blooms（HABs）, and hypoxia in recent decades. Application of sedimentary biogenic element indicators on the study of paleoenvironment can reconstruct environmental evolution history of waters. Two 210Pb-dated cores were collected from the Changjiang River Estuary（S3） and adjacent coastal area（Z13）, and total organic carbon（TOC）, total nitrogen（TN）, biogenic silicon（BSi）, total phosphorus（TP） and phosphorus（P） species were analyzed. Three stages of environmental changes are deduced by the nutrient sedimentary records. First, nutrient concentration increased rapidly since the 1950 s, which attributed to agriculture development and overused chemical fertilizers. Second, nutrient concentration kept high and primary production began to promote during the 1960 s to 1980 s, while diatom abundance and proportion began to decline since the 1970 s, accompanied by reduced 23 Si O- concentration and flux from the river. Third, due to several dams and bridges constructed, river runoff and coastal hydrodynamic conditions reduced to a certain extent since the 1990 s, which aggravated the unbalance in nutrient structure. Multi-nutrient proxies in sediment can reflect the natural environm-ental changes as well as influence of human activities.

关键词： biogenic elements phosphorus species sediment cores Changjiang River Estuary

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Occurrence and distribution of antibiotic resistance genes in the sediments of the East China Sea bays

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Journal of environmental Sciences 2019年第7期31卷 156-167页

作者： Jiayu Chen Zhiguo Su Tianjiao Dai Bei Huang Qinglin Mu Yongming Zhang Donghui Wen School of environmental and Geography Sciences Shanghai Normal University College of environmental Sciences and Engineering Peking University Zhejiang Provincial Zhoushan Marine Ecological environmental monitoring station

The coastal area of the East China Sea has experienced rapid urbanization and industrialization in China since 1980 s, resulting in severe pollution of its *** resistance genes(ARGs) are regarded as a kind of emerging pollutant with potential high risk. The sediment samples were collected from Hangzhou Bay(HB),Xiangshan Bay(XB), and Taizhou Bay(TB) to investigate the spatial occurrence and distribution of 27 ARGs and class I integron–integrase gene(intI1) in the coastal area of the East China Sea. The PCR results showed the frequent presence of 11 ARGs and intI1 in the sediments of the three bays. The qPCR results further showed that sulfonamide resistance was the most prevalent ARG type and antibiotic target replacement and protection were the most important resistance mechanisms in the sediments. Regarding the subtype of ARGs, sulI, tetW, and dfrA13 were the most abundant ARGs, in which sulI was higher in TB(based on both the absolute and relative abundances) and dfrA13 was higher in HB(based on the relative abundances). The network analysis revealed that intI1 had significant correlations with tetC, sulI, sulII, and blaPSE-1. Oil was the key connected factor, which had positive connections with sulI, sulII, and blaPSE-1. In addition, the joint effect of heavy metals and nutrients & organic pollutants might be crucial for the fate of ARGs in the coastal sediments.

关键词： Antibiotic resistance genes (ARGs) Class I integron–integrase gene(intI1) the East China Sea sediment

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