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| 1 | Entropy method for determination of weight of evaluating indicators in fuzzy synthetic evaluation for water quality assessment显示文摘Considering the difficulty of fuzzy synthetic evaluation method in calculation of the multiple factors and ignorance of the relationship among evaluating objects, a new weight evaluation process using entropy method was introduced. This improved method for determination of weight of the evaluating indicators was applied in water quality assessment of the Three Gorges reservoir area. The results showed that this method was favorable for fuzzy synthetic evaluation when there were more than one evaluating objects. One calculation was enough for calculating every monitoring point. Compared with the original evaluation method, the method predigested the fuzzy synthetic evaluation process greatly and the evaluation results are more reasonable. | ZOU Zhi-hong YUN Yi SUN Jing-nan | 2006 | Journal of Environmental Sciences2006，18，5： | 203 |
| 2 | Risk assessment of heavy metals in soils and vegetables around nonferrous metals mining and smelting sites,Baiyin,China显示文摘A field survey was conducted to investigate the metal and arsenic contamination in soils and vegetables on four villages (Shuichuan (SCH), Beiwan (BWA), Dongwan (DWA) and Wufe (WFE)) located along, Baiyin, China, and to evaluate the possible health risks to local population through foodchain. Results show that the most significantly contaminated soils occurred upstream at SCH where Cd, Cu and As concentrations exceeded maximum allowable concentrations for Chinese agricultural soil. Further downstream the degree of contamination semi-systematically decreased in concentrations of metal. Generally, the leafy vegetables were more heavily contaminated than non-leafy vegetables. Chinese cabbage is the most severely contaminated, the concentrations of Cd exceeded the maximum permit levels (0.05 mg/kg) by 4.5 times. Bio-accumulate factor also shows that an entry of Cd to food chain plants is the greatest potential. Furthermore, the estimated daily intake amounts of the considered toxic elements (Cd, Pb and Cu) from the vegetables grown at SCH and BWA and DWA have exceeded the recommended dietary allowance levels. Thus, the vegetables grown in three villages above, which affected by Baiyin mining and smelting have a health hazard for human consumption. | LI Yu WANG Yan-bin GOU Xin SU Yi-bing WANG Gang | 2006 | Journal of Environmental Sciences2006，18，6： | 84 |
| 3 | Source profiles of particulate organic matters emitted from cereal straw burnings显示文摘谷物稻草足够地是在中国烧的最丰富的生物资源之一,但是到好微粒的 itscontribution 不是 understood.In 这研究,三根主要类型 ofcereal 稻草从从使遭到控制烧的谷物稻草在 China.Fine 微粒事( PM2.5 )生产区域的五谷物被收集,两个在闷烧和 flamingstatus 下面,被在 thelaboratory.Element 碳( EC )使用一个特定的做的冲淡房间和采样系统取样,器官的碳( OC )是 analyzed. | ZHANG Yuan-xun SHAO Min ZHANG Yuan-hang ZENG Li-min HE Ling-yan ZHU Bin WEI Yong-jie ZHU Xian-lei | 2007 | Journal of Environmental Sciences2007，19，2： | 88 |
| 4 | Progress in carbon dioxide separation and capture: A review显示文摘这篇文章考察在 CO2 分离和俘获研究和工程取得的进步。各种各样的技术例如吸收,吸附,和膜分离,彻底地被讨论。象化学循环的燃烧和基于水合物的分离那样的新概念也简短被介绍。未来方向被建议。隐遁方法海洋授精和矿物质碳酸饱和技术例如造林,也被盖住。地下的注射和直接海洋垃圾场没被盖住。 | Hongqun Yang Zhenghe Xu Maohong Fan Rajender Gupta Rachid B Slimane Alan E Bland Ian Wright | 2008 | Journal of Environmental Sciences2008，20，1： | 89 |
| 5 | A review on the generation, determination and mitigation of Urban Heat Island显示文摘当在第 21 世纪的主要问题之一由于人的文明的都市化和工业化摆姿势到人,城市的热岛(UHI ) 被考虑。当他们消费,从城市的结构产生的大量热并且重新散发太阳辐射,并且从人为的热,来源是 UHI 的主要原因。二热来源作为与它的环境相比增加一个城市的区域的温度,它作为城市的热岛紧张(UHII ) 被知道。这个问题与大人口和广泛的经济活动在城市或宗主国里是甚至更坏的。30 亿个人在世界上住在估计城市的区域直接暴露于这个问题,它在不久的将来将显著地被增加。由于这个问题的严厉,广阔研究努力被奉献了,大量文学为这个题目是可得到的。在这个区域可得到的文学包括最近的研究途径,概念,方法论,最近的调查工具和缓解措施。这研究被执行通过 UHI 的最重要的特征的调查考察并且总结这个研究区域。热由应该被调查在的最重要的角色详细说明学习特别的城市的加热的城市的结构戏重新散发,这被结束 UHI。未来研究应该为减少城市的热岛的效果并且最终住在更好的环境集中于设计和计划参数,这也被结束。 | RIZWAN Ahmed Memon DENNIS Y.C. Leung LIU Chunho | 2008 | Journal of Environmental Sciences2008，20，1： | 116 |
| 6 | Spatial distribution and pollution assessment of heavy metals in urban soils from southwest China显示文摘To identify the concentrations and sources of heavy metals, and to assess soil environmental quality, 63 soil samples were collected in Yibin City, Sichuan Province, China. Mean concentrations of As, Pb, Zn, and Cu were 10.55, 61.23, 138.88 and 56.35 mg/kg, respectively. As concentrations were comparable to background values, while Pb, Zn, and Cu concentrations were higher than their corresponding background values. Industrial areas exhibited the highest concentrations of As, Pb, Zn, and Cu, while the lowest concentrations occurred in parks. Statistical analysis was performed and two cluster groups of metals were identified with Pb, Zn, and Cu in one group and As in the other. Spatial distribution maps indicated that Pb, Zn, and Cu were mainly controlled by anthropogenic activities, whereas As could be mainly accounted for by soil parent materials. Pollution index values of As, Pb, Zn, and Cu varied in the range of 0.24-1.93, 0.66-7.24, 0.42-4.19, and 0.62-5.25, with mean values of 0.86, 1.98, 1.61, and 1.78, respectively. The integrated pollution index (IPI) values of these metals varied from 0.82 to 3.54, with a mean of 1.6 and more than 90% of soil samples were moderately or highly contaminated with heavy metals. The spatial distribution of IPI showed that newer urban areas displayed relatively lower heavy metal contamination in comparison with older urban areas. | Guanghui Guo Fengchang Wu Fazhi Xie Ruiqing Zhang | 2012 | Journal of Environmental Sciences2012，24，3： | 86 |
| 7 | Outline of the Report on Cardiovascular Disease in China,2010显示文摘Major and profound changes have taken place in China over the past 30 years.Rapid socioeconomic progress has exerted a great impact on lifestyle,ranging from food,clothing,working and living conditions,and means of transportation to leisure activities and entertainment.At the same time,new health problems have emerged,and health services are facing new challenges.Presently,cardiovascular diseases (CVD) are among the top health problems of the Chinese people,and pose a serious challenge to all engaged in the prevention and control of these diseases.An epidemic of CVD in China is emerging as a result of lifestyle changes,urbanization and longevity.Both national policy decision-making and medical practice urgently need an authoritative report which comprehensively reflects the trends in the epidemic of CVD and current preventive measures.Since 2005,guided by the Bureau of Disease Prevention of the Ministry of Health of the People's Republic of China and the National Center for Cardiovascular Diseases of China,nationwide experts in the fields of epidemiology,clinical medicine and health economics in the realms of CVD,cerebrovascular disease,diabetes and chronic kidney disease,completed the Report on Cardiovascular Diseases in China every year.The report aims to provide a timely review of the trend of the epidemic and to assess the progress of prevention and control of CVD.In addition,as the report is authoritative,representative and readable,it will become an information platform in the CVD field and an important reference book for government,academic institutes,medical organizations and clinical physicians.This publication is expected to play a positive role in the prevention and control of CVD in China.We present an abstract from the Report on Cardiovascular Diseases in China (2010),including trends in CVD,morbidity and mortality of major CVDs,up-to-date assessment of risk factors,as well as health resources for CVD,and a profile of medical expenditure,with the aim of providing evidence for decision-making in CVD prevention and control programs in China,and of delivering the most authoritative information on CVD prevention and control for all citizens. | HUSheng Shou KONG Ling Zhi GAO Run Lin ZHU Man Lu WANG Wen WANG Yong Jun WU Zhao Su CHEN Wei Wei LIU Ming Bo For the editorial board | 2012 | Biomedical and Environmental Sciences2012，25，3： | 93 |
| 8 | Predictive Values of Body Mass Index and Waist Circumference for Risk Factors of Certain Related Diseases in Chinese Adults - Study on Optimal Cut-off Points of Body Mass Index and Waist Circumference in Chinese Adults显示文摘Objective For prevention of obesity in Chinese population, it is necessary to definethe optimal range of healthy weight and the appropriate cut-off points of BMI and waistcircumference for Chinese adults. The Working Group on Obesity in China under the supportof International Life Sciences Institute Focal Point in China organized a meta-analysis on therelation between BMI, waist circumference and risk factors of related chronic diseases (e. g.,high diabetes, diabetes mellitus, and lipoprotein disorders). Methods 13 population studiesin all met the criteria for enrollment, with data of 239 972 adults (20-70 year) surveyed inthe 1990s. Data on waist circumference was available for 111411 persons and data on serumlipids and glucose were available for more than 80 000. The study populations located in21provinces, municipalities and autonomous regions in China's Mainland as well as inTaiwan. Each enrolled study provided data according to a common protocol and uniformformat. The Center for data management in Department of Epidemiology, Fu Wai Hospitalwas responsible for statistical analysis. Results and conclusion The prevalence ofhypertension, diabetes, dyslipidemia and clustering of risk factors all increased withincreasing levels of BMI or waist circumference. BMI at 24 with best sensitivity andspecificity for identification of the risk factors, was recommended as the cut-off point foroverweight, BMI at 28 which may identify the risk factors with specificity around 90 % wasrecommended as the cut-off point for obesity. Waist circumference beyond 85 cm for menand beyond 80 cm for women were recommended as the cut-off points for central obesity.Analysis of population attributable risk percent illustrated that reducing BMI to normalrange (<24) could prevent 45%-50% clustering of risk factors. Treatment of obese persons(BMI≥28)with drugs could prevent 15%-17% clustering of risk factors. The waistcircumference controlled under 85 cm for men and under 80 cm for women, could prevent47%-58% clustering of risk factors. According to these, a classification of overweight andobesity for Chinese adults is recommended. | ZHOU BEI-FAN2Cooperative Meta-Analysis Group of the Working Group on Obesity in China | 2002 | Biomedical and Environmental Sciences2002，15，1： | 237 |
| 9 | Heavy metals pollution in poultry and livestock feeds and manures under intensive farming in Jiangsu Province, China显示文摘The heavy metals pollution in poultry and livestock feeds and manures under intensive farming in Jiangsu Province was investigated. 97 feed and manure samples were sampled from 31 farming plants in 10 major cities of Jiangsu. 14 metals, including Zn, Cu, Pb, Cd, Cr, Ni, Mo, Mn, Ba, Co, Sr, Ti, As and Hg, were analyzed after samples acid digestion. The results showed that the most feed samples contained high concentration of metals exceeding National Hygienical Standard for Feeds. Meanwhile, it was found that Cu, Zn, Pb, Cd and Cr concentrations in animal manures were also high, for example, Cu concentration in a manure sample reached to as much as 1726 3 mg/kg. Heavy metals loading quantities in soil per year were then calculated when metals contaminated organic fertilizers were applied, and its effects on soil environmental quality were further evaluated. | CANGLong WANGYu-jun ZHOUDong-mei DONGYuan-hua | 2004 | Journal of Environmental Sciences2004，16，3： | 183 |
| 10 | Long-term monitoring and source apportionment of PM_(2.5)/PM_(10) in Beijing,China显示文摘During 2001-2006,PM2.5 (particle matter with aerodynamic diameter less than 2.5 microns) and PM10 (particle matter with aerodynamic diameter less than 10 microns) were collected at the Beijng Normal University (BNU) site,China,and in 2006,at a background site in Duolun (DL).The long-term monitoring data of elements,ions,and black carbon showed that the major constituents of PM2.5 were black carbon (BC) crustal elements,nitrates,ammonium salts,and sulfates.These five major components accounted for 20%-80% of the total PM2.5.During this period,levels of Pb and S in PM remained rather high,as compared with the levels in other large cities in the world.Source apportionment results suggest that there were 6 common sources for PM2.5 and PM10,i.e.,soil dust,vehicular emission,coal combustion,secondary aerosol,industrial emission,and biomass burning.Coal combustion was the largest contributor of PM2.5 with a percentage of 16.6%,whereas soil dust played the most important role in PM10 with a percentage of 27%.In contrast,only three common types of sources could be resolved at the background DL site,namely,soil dust,biomass combustion,and secondary aerosol from combustion sources. | Hailin WANG Zhengping HAO | 2008 | Journal of Environmental Sciences2008，20，11： | 65 |
| 11 | Disease Risks of Childhood Obesity in China显示文摘Objective To estimate the relative risks of dyslipidemia, hypertension, diabetes mellitus, and metabolic syndromes among overweight and obese Chinese children compared with their normal weight counterparts. Methods Overweight and obesity were defined by age- and sex-specific BMI classification reference for Chinese children and adolescents. Pediatric metabolic syndrome (MetS) and each risk factor for MetS were defined using the criteria for US adolescents. Definition of hyper-TC, LDL, and dyslipidemia for adults was applied as well. General linear model factor analysis and chi-square test were used to compare the difference in metabolic indicators among normal weight, overweight, and obese groups. Multiple logistic regression analysis was performed to estimate the odds ratio of metabolic abnormalities between obesity, overweight, and normal weight children, after adjustment for living area, family economic level, age, sex, and daily exercise time and TV watching time, as well as different dietary indices in the model. Results Significant increases in blood lipids, glucose, and blood pressure were found among overweight and obese children as compared with their counterparts with normal weight. By applying WGOC-recommended BMI classification, the risks for hypertriglyceridemia, low HDL and dyslipidemia among overweight children were 1.9, 1.4, and 1.5 times, and was 3.3, 1.5, and 1.8 times among obese groups compared to their counterparts with normal weight after adjustment for age, sex, region, socioeconomic status, physical activity, and dietary intakes. The overweight and obese children (15-17.9 years) had a high-risk of developing hypertension, which was 2.3 and 2.9times higher than their counterparts with normal weight. Above 90% obese adolescents had abdominal obesity, while less than1% normal weight ones had abdominal obesity. No obese adolescents were free from any risk factors for MetS, while 36.9% of normal weight adolescents were from the risk factors. 83.3% obese boys and all obese girls had metabolic syndrome, while only15.5% normal weight boys and 18.8% normal weight girls had metabolic syndrome. Four risk factors for metabolic syndrome were found in 8.3% obese boys while none in normal weight boys and girls. The prevalence of MetS among normal weight,overweight, and obesity groups was 1.5%, 18.3%, and 38.1% respectively. Conclusion The cardiovascular disease (CVD)risk factors are clustered in obese Chinese children. Our observations strongly suggest that efforts should be made to prevent the onset of overweight and its associated diseases during early childhood. | YAN-PING LI XIAO-GUANG YANG FENG-YING ZHAI JIAN-HUA PIAO WEN-HUA ZHAO JIAN ZHANG GUAN-SHENG MA | 2005 | Biomedical and Environmental Sciences2005，18，6： | 70 |
| 12 | Assessment and mapping of environmental quality in agricultural soils of Zhejiang Province, China显示文摘在显示重 metalcontamination 的地位并且估计 908 土壤全部的环境优秀 ofagricultural soils.A 的省 weremonitored 取样的浙江的农业土壤的重金属集中从 38 countiesin 浙江 Provinceand 是镇定的八重金属( Cd , Cr , Pb , Hg , Cu , Zn , Ni 并且作为)集中被评估了 inagriculturalsoil.It 被发现 775 件样品是未受污染的, 133 件样品分别地是稍微弄脏的 andmore ,那是approximately14.65% | CHENG Jie-liang SHI Zhou ZHU You-wei | 2007 | Journal of Environmental Sciences2007，19，1： | 66 |
| 13 | Production and application of a novel bioflocculant by multiple-microorganism consortia using brewery wastewater as carbon source显示文摘The flocculating activity of a novel bioflocculant MMF1 produced by multiple-microorganism consortia MM1 was investigated.MM1 was composed of strain BAFRT4 identified as Staphylococcus sp.and strain CYGS1 identified as Pseudomonas sp.Theflocculating activity of MMF1 isolated from the screening medium was 82.9%,which is remarkably higher than that of the bioflocculantproduced by either of the strains under the same condition.Brewery wastewater was also used as the carbon source for MM1,and thecost-effective production medium for MM1 mainly comprised 1.0 L brewery water(chemical oxygen demand(COD)5000 mg/L),0.5 g/L urea,0.5 g/L yeast extract,and 0.2 g/L(NH4)2SO4.The optimal conditions for the production of MMF1 was inoculum size2%,initial pH 6.0,cultivating temperature 30°C,and shaking speed 160 r/min,under which the flocculating activity of the MMF1reached 96.8%.Fifteen grams of purified bioflocculant could be recovered from 1.0 L of fermentation broth.MMF1 was identified asa macromolecular substance containing both protein and polysaccharide.It showed good flocculating performance in treating indigotinprinting and dyeing wastewater,and the maximal removal effciencies of COD and chroma were 79.2%and 86.5%,respectively. | ZHANG Zhi-qiang LIN Bo XIA Si-qing WANG Xue-jiang YANG A-ming | 2007 | Journal of Environmental Sciences2007，19，6： | 62 |
| 14 | Characterizing ionic species in PM_(2.5) and PM_(10) in four Pearl River Delta cities,South China显示文摘PM2.5 和 PM10 样品在珍珠河三角洲(PRD ) 在四个主要城市被收集,华南,在在 2002 的冬季和夏天期间。六个水溶性的离子, Na (+) , NH4 (+) , K (+) , Cl (?) , NO3 (?) 和 SO4 (2 ?) 用离子层析被测量。平均,离子的种类为 PM2.5 和 PM10 占了 53.3% 和 40.5% ,分别地在冬季并且 39.4% 和 35.2% ,分别地在里面夏天。象硫酸盐,硝酸盐和铵那样的第二等的离子说明了全部的离子的种类的主要部分。硫酸盐是硝酸盐跟随的最丰富的种类。总的来说,一个地区性的污染趋势被看那有另外的 PRD 城市里的比那些的广州城市里的硫酸盐,硝酸盐和铵的更高的集中。重要季节变化也在冬季与种类的高水平被观察,但是在夏天降低。当高度本地工业排出物装载趋于败坏时,亚洲季风系统为在在夏天的 PRD 的空气污染物的移动和散开是有利的空气质量也。NO3 (?)/SO4 (2 )(?) 比率显示活动来源更加有贡献到城市的喷雾器,并且静止来源不应该被忽视。除主要排出物以外,在有利天气条件下面的复杂大气的反应应该在 PRD 区域为主要排放的控制被付更多的注意。 | LAI Sen-chao ZOU Shi-chun CAO Jun-ji LEE Shun-cheng HO Kin-fai | 2007 | Journal of Environmental Sciences2007，19，8： | 76 |
| 15 | Investigation on emission factors of particulate matter and gaseous pollutants from crop residue burning显示文摘微粒物质(下午)的排放因素,元素碳( EC ),器官的碳( OC ), SO2 , NOx ,公司, CO2 ,和十个离子(Na+,NH4+,K+,Mg2+,Ca2+, F ?, Cl ?, NO2 ?, NO3 ?, SO42 ?)从在农村中国的通常生产的罪残茬的四种类型的国内烧被估计:稻秸,麦秸,玉米 stover,和棉花越过中国搜索区域,它从代表是镇定的。一个燃烧塔被设计模仿农民在农村中国在下面烧了他们的罪残茬的煮的条件,到措施排放因素。,结果证明那麦秸在四罪残茬之中有最高的排放因素彻底的下午(8.75 g/kg ) 玉米 stover 和麦秸分别地为 EC (0.95 g/kg ) 和 OC (3.46 g/kg ) 有最高的排放因素。玉米 stover 也作为有最高的排放因素介绍没有, NOx,和 CO2,麦秸,稻秸,和棉花梗分别地有 NO2, SO2,和公司的最高的排放因素。水溶性的离子, K+ 和 Cl ? ,从所有庄稼有最高的排放因素。麦秸有阳离子种类和 F 的一个相对更高的排放因素 ? , Cl ? , NO2 吗?比另外的残余。 | CAO Guoliang ZHANG Xiaoye GONG Sunling ZHENG Fangcheng | 2008 | Journal of Environmental Sciences2008，20，1： | 61 |
| 16 | Effects of several amendments on rice growth and uptake of copper and cadmium from a contaminated soil显示文摘在可变费用土壤的重金属是高度对进植物的转移可得到、容易的简历。因为完全消除在污染土壤上种的大米是不可能的,一些补习和缓解技术是必要的由大米减少金属简历可获得性和举起。这盆栽试验从被铜和镉污染的水稻土在米饭的生长和重金属的举起上调查了七个修正案的效果。结果从增加了谷物的石灰石的申请的最好在谷物由 12.5 16.5 褶层,和减少的 Cu 和 Cd 集中让步由 23.0%50.4% 。钙镁磷酸盐,钙硅酸盐,猪粪肥,和泥炭的申请也由 0.3 15.3 褶层增加了谷物收益,并且有效地减少了在谷物的 Cu 和 Cd 集中。在谷物的 Cd 集中稍微在紫云英和锌硫酸盐的处理被减少。在谷物和稻草的 Cu 和 Cd 的集中在土壤依赖于可得到的 Cu 和 Cd,并且玷污可得到的 Cu 和 Cd 被土壤 pH 显著地影响。 | LI Ping WANG Xingxiang ZHANG Taolin ZHOU Dongmei HE Yuanqiu | 2008 | Journal of Environmental Sciences2008，20，4： | 72 |
| 17 | Heavy metal pollution in intertidal sediments from Quanzhou Bay, China显示文摘The concentrations of eight heavy metals (Cu, Zn, Pb, Cd, Cr, Ni, Hg, and As) in the intertidal surface sediments from Quanzhou Bay were determined to evaluate their levels and spatial distribution due to urbanization and economic development of Quanzhou region, southeast China. The ranges of the measured concentrations in the sediments are as follows: 24.8–119.7 mg/kg for Cu, 105.5–241.9 mg/kg for Zn, 34.3–100.9 mg/kg for Pb, 0.28–0.89 mg/kg for Cd, 51.1–121.7 mg/kg for Cr, 16.1–45.7 mg/kg for Ni, 0.17–0.74 mg/kg for Hg, and 17.7–30.2 mg/kg for As. The overall average concentrations of above metals exceed the primary standard criteria but meet the secondary standard criteria of the Chinese National Standard of Marine Sediment Quality. Several contents of Cu and Hg exceed the secondary standard criteria at some stations. The results of geoaccumulation index (Igeo) show that Cd causes strong pollution in most of the study area. There are no significant correlations among most of these heavy metals, indicating they have different anthropogenic and natural sources. Some locations present severe pollution by heavy metals depending on the sources, of which sewage outlets, aquatic breeding, and commercial ports are the main sources of contaminants to the area. | YU Ruilian YUAN Xing ZHAO Yuanhui HU Gongren TU Xianglin | 2008 | Journal of Environmental Sciences2008，20，6： | 73 |
| 18 | Characterization of dissolved organic matter fractions from Lake Hongfeng, Southwestern China Plateau显示文摘With XAD-series and ion exchange resins, dissolved organic matter (DOM) from Lake Hongfeng in Southwestern China Plateau was isolated into 6 fractions, i.e., humic acid (HA), fulvic acid (FA), hydrophobic neutrals (HON), hydrophilic acids (HIA), hydrophilic bases (HIB) and hydrophilic neutrals (HIN). Those fractions were characterized by high performance size exclusion chromatography, fluorescence spectroscopy and UV absorbance. Among the 6 fractions, FA was predominant and accounted for 51% of the total DOM. The weight-average (Mw) and number-averaged (Mn) molecular weight of these fractions ranged from 1688 to 2355 Da and from 1338 to 1928 Da, respectively. A strong correlation was observed between specific UV absorbance at 280 nm, E2/E3 (absorbance at 250 nm to 365 nm), and the molecular weight for DOM fractions. UV-Vis fulvic-like fluorescence peaks were found in all fractions. Protein-like fluorescence peaks existed in HON may indicate that microbial activity was severely in Lake Hongfeng. There was a significant relationship between fluorescence intensities and specific UV absorbance at 254 nm for those DOM fractions, suggesting their similar luminescence characteristics. The values of fluorescence index (f450/500) indicated that hydrophobic fractions may derive from terrestrial sources, and the hydrophilic fractions from microbial and terrestrial origins. Those results suggest that there were inter-relationships between molecular weight, fluorescence and absorbance characteristics, and also subtle consistencies between the hydrophilic and hydrophobic properties and the sources for these 6 fractions from Lake Hongfeng. | WANG Liying WU Fengchang ZHANG Runyu LI Wen LIAO Haiqing | 2009 | Journal of Environmental Sciences2009，21，5： | 61 |
| 19 | Chemical characteristics of PM_(2.5) during a typical haze episode in Guangzhou显示文摘The chemical characteristics(water-soluble ions and carbonaceous species) of PM2.5 in Guangzhou were measured during a typical haze episode.Most of the chemical species in PM2.5 showed significant difference between normal and haze days.The highest contributors to PM2.5 were organic carbon(OC),nitrate,and sulfate in haze days and were OC,sulfate,and elemental carbon(EC) in normal days.The concentrations of secondary species such as,NO3-,SO42-,and NH4+ in haze days were 6.5,3.9,and 5.3 times higher than those in normal days,respectively,while primary species(EC,Ca2+,K+) show similar increase from normal to haze days by a factor about 2.2-2.4.OC/EC ratio ranged from 2.8 to 6.2 with an average of 4.7 and the estimation on a minimum OC/EC ratio showed that SOC(secondary organic carbon) accounted more than 36.6% for the total organic carbon in haze days.The significantly increase in the secondary species(SOC,NO3-,SO42-,and NH4+),especially in NO3-,caused the worst air quality in this region.Simultaneously,the result illustrated that the serious air pollution in haze episodes was strongly correlated with the meteorological conditions.During the sampling periods,air pollution and visibility had a good relationship with the air mass transport distance;the shorter air masses transport distance,the worse air quality and visibility in Guangzhou,indicating the strong domination of local sources contributing to haze formation.High concentration of the secondary aerosol in haze episodes was likely due to the higher oxidation rates of sulfur and nitrogen species. | TAN Jihua DUAN Jingchun HE Kebin MA Yongliang DUAN Fengkui CHEN Yuan FU Jiamo | 2009 | Journal of Environmental Sciences2009，21，6： | 71 |
| 20 | Iron-doped Mn-Ce/TiO_2 catalyst for low temperature selective catalytic reduction of NO with NH_3显示文摘The catalysts of iron-doped Mn-Ce/TiO 2(Fe-Mn-Ce/TiO 2) prepared by sol-gel method were investigated for low temperature selective catalytic reduction(SCR) of NO with NH 3.It was found that the NO conversion over Fe-Mn-Ce/TiO 2 was obviously improved after iron doping compared with that over Mn-Ce/TiO 2.Fe-Mn-Ce/TiO 2 with the molar ratio of Fe/Ti = 0.1 exhibited the highest activity.The results showed that 96.8% NO conversion was obtained over Fe(0.1)-Mn-Ce/TiO 2 at 180°C at a space velocity of 50,000 hr 1.Fe-Mn-Ce/TiO 2 exhibited much higher resistance to H 2 O and SO 2 than that of Mn-Ce/TiO 2.The properties of the catalysts were characterized using X-ray diffraction(XRD),N 2 adsorption,temperature programmed desorption(NH 3-TPD and NOx-TPD),and Xray photoelectron spectroscopy(XPS) techniques.BET,NH3-TPD and NOx-TPD results showed that the specific surface area and NH3 and NOx adsorption capacity of the catalysts increased with iron doping.It was known from XPS analysis that iron valence state on the surface of the catalysts were in Fe3+ state.The doping of iron enhanced the dispersion and oxidation state of Mn and Ce on the surface of the catalysts.The oxygen concentrations on the surface of the catalysts were found to increase after iron doping.Fe-Mn-Ce/TiO2 represented a promising catalyst for low temperature SCR of NO with NH3 in the presence of H2 O and SO2. | Boxiong Shen ,Ting Liu,Ning Zhao,Xiaoyan Yang,Lidan Deng College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China. | 2010 | Journal of Environmental Sciences2010，22，9： | 63 |
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