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Resuspension method for road surface dust collection and aerodynamic size distribution characterization 路面粉尘收集的再悬浮方法及气动尺寸分布表征
China Particuology Pub Date : 2006-12-01 DOI: 10.1016/S1672-2515(07)60279-6
Jianhua Chen , Hongfeng Zheng , Wei Wang , Hongjie Liu , Ling Lu , Linfa Bao , Lihong Ren
{"title":"Resuspension method for road surface dust collection and aerodynamic size distribution characterization","authors":"Jianhua Chen ,&nbsp;Hongfeng Zheng ,&nbsp;Wei Wang ,&nbsp;Hongjie Liu ,&nbsp;Ling Lu ,&nbsp;Linfa Bao ,&nbsp;Lihong Ren","doi":"10.1016/S1672-2515(07)60279-6","DOIUrl":"10.1016/S1672-2515(07)60279-6","url":null,"abstract":"<div><p>Traffic-generated fugitive dust is a source of urban atmospheric particulate pollution in Beijing. This paper introduces the resuspension method, recommended by the US EPA in AP-42 documents, for collecting Beijing road-surface dust. Analysis shows a single-peak distribution in the number size distribution and a double-peak mode for mass size distribution of the road surface dust. The median diameter of the mass concentration distribution of the road dust on a high-grade road was higher than that on a low-grade road. The ratio of PM<sub>2.5</sub> to PM<sub>10</sub> was consistent with that obtained in a similar study for Hong Kong. For the two selected road samples, the average relative deviation of the size distribution was 10.9% and 11.9%. All results indicate that the method introduced in this paper can effectively determine the size distribution of fugitive dust from traffic.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 6","pages":"Pages 300-303"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60279-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79005166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
A review of polar stratospheric cloud formation 极地平流层云形成的研究进展
China Particuology Pub Date : 2006-12-01 DOI: 10.1016/S1672-2515(07)60275-9
Xihong Wang, Diane V. Michelangeli
{"title":"A review of polar stratospheric cloud formation","authors":"Xihong Wang,&nbsp;Diane V. Michelangeli","doi":"10.1016/S1672-2515(07)60275-9","DOIUrl":"10.1016/S1672-2515(07)60275-9","url":null,"abstract":"<div><p>Liquid and solid particles in polar stratospheric clouds (PSCs) have been known to play a crucial role in the chemical loss of stratospheric ozone over the Antarctic and Arctic regions in late winter and early spring. The stratospheric aerosol and cloud particles provide the sites where fast heterogeneous chemical reactions convert inactive halogen reservoir species into potential ozone destroying radicals. The sedimentation of nitric acid-containing PSC particles irreversibly removes HNO<sub>3</sub> gas (denitrification) from the lower stratosphere, which slows the return of chlorine to its inactive forms, resulting in more severe stratospheric ozone destruction. Although these clouds have been investigated extensively during the past decade using <em>in situ</em> field observation, laboratory experiment and modeling studies, the detailed microphysics processes under cold stratospheric conditions are still uncertain. This paper reviews the recent advances in our understanding of PSCs.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 6","pages":"Pages 261-271"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60275-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78179561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Investigations of main factors affecting tropospheric nitrate aerosol using a coupling model 用耦合模式研究影响对流层硝酸盐气溶胶的主要因素
China Particuology Pub Date : 2006-12-01 DOI: 10.1016/S1672-2515(07)60286-3
Tijian Wang, Shu Li, F. Jiang, Lijie Gao
{"title":"Investigations of main factors affecting tropospheric nitrate aerosol using a coupling model","authors":"Tijian Wang, Shu Li, F. Jiang, Lijie Gao","doi":"10.1016/S1672-2515(07)60286-3","DOIUrl":"https://doi.org/10.1016/S1672-2515(07)60286-3","url":null,"abstract":"","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"74 1","pages":"336-341"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74527656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Introducing a new international program: monsoon asia integrated regional study (MAIRS) 介绍一个新的国际项目:亚洲季风综合区域研究(MAIRS)
China Particuology Pub Date : 2006-12-01 DOI: 10.1016/S1672-2515(07)60289-9
Congbin Fu, Ailikun, Renjian Zhang, Xiaodong Yan
{"title":"Introducing a new international program: monsoon asia integrated regional study (MAIRS)","authors":"Congbin Fu,&nbsp;Ailikun,&nbsp;Renjian Zhang,&nbsp;Xiaodong Yan","doi":"10.1016/S1672-2515(07)60289-9","DOIUrl":"10.1016/S1672-2515(07)60289-9","url":null,"abstract":"<div><p>The Monsoon Asia Integrated Regional Study (MAIRS) is a new Earth System Science Partnership (ESSP) program aimed at the integrated study of environmental changes over monsoon Asian region. This paper briefly introduces MAIRS, its background and concept, scientific themes and objectives, data requirements and its information system, intensive observation experiment, and its linkage with ongoing international projects.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 6","pages":"Pages 352-355"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60289-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87033132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Distribution of carbonaceous aerosol during spring 2005 over the horqin sandland in northeastern china 2005年春季科尔沁沙地碳质气溶胶的分布
China Particuology Pub Date : 2006-12-01 DOI: 10.1016/S1672-2515(07)60282-6
Xuxiang Li , Zhenxing Shen , Junji Cao , Suixin Liu , Chongshu Zhu , Ting Zhang
{"title":"Distribution of carbonaceous aerosol during spring 2005 over the horqin sandland in northeastern china","authors":"Xuxiang Li ,&nbsp;Zhenxing Shen ,&nbsp;Junji Cao ,&nbsp;Suixin Liu ,&nbsp;Chongshu Zhu ,&nbsp;Ting Zhang","doi":"10.1016/S1672-2515(07)60282-6","DOIUrl":"10.1016/S1672-2515(07)60282-6","url":null,"abstract":"<div><p>The objective of this study was to characterize the elemental carbon and organic carbon (EC and OC, respectively) content of aerosol particles (PM<sub>2.5</sub>) collected at Tongliao, a site in the Horqin Sandland of northeastern China. During spring 2005, the PM<sub>2.5</sub> mass concentration was 126±71 μg·m<sup>−3</sup>, with higher dust concentrations during five dust storms than on non-dusty days (255±77 vs. 106±44 μg·m<sup>−3</sup>). The average OC and EC concentrations in PM<sub>2.5</sub> determined by a thermal/optical reflectance method were 15.7±7.3 μg·m<sup>−3</sup> and 3.3±1.7 μg·m<sup>−3</sup>, respectively, and carbonaceous aerosol accounted for 9.9% of the PM<sub>2.5</sub> mass during dust storms compared to 21.7% on normal days. The average ratios of OC to EC during dust storms were similar to those on non-dusty days, and the correlation coefficient between OC and EC was high, 0.86. The high OC/EC ratios, the distributions of eight carbon fractions, and the strong relationship between K with OC and EC indicate that rural biomass burning was the dominant contributor to the regional carbonaceous aerosol.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 6","pages":"Pages 316-322"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60282-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77062576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Influence of glass cullet in cement pastes 玻璃屑对水泥浆料的影响
China Particuology Pub Date : 2006-10-01 DOI: 10.1016/S1672-2515(07)60266-8
A. Karamberi , E. Chaniotakis , D. Papageorgiou , A. Moutsatsou
{"title":"Influence of glass cullet in cement pastes","authors":"A. Karamberi ,&nbsp;E. Chaniotakis ,&nbsp;D. Papageorgiou ,&nbsp;A. Moutsatsou","doi":"10.1016/S1672-2515(07)60266-8","DOIUrl":"10.1016/S1672-2515(07)60266-8","url":null,"abstract":"<div><p>The present study investigates glass and cement compatibility with a view to use glass as a cement replacement. Amber, flint and green glasses were chosen due to their prevalence in the Greek market as packaging materials. The factors under investigation were the pozzolanicity of the glass cullet, the hydration rate and the mechanical strength development of the cement pastes, as well as the expansion of the specimens due to alkali-silica reaction. Moreover, the potential enhancement of glass pozzolanic activity was examined. The results of the study were encouraging to show the potentiality of utilising glass cullet in cementitious products.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 5","pages":"Pages 234-237"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60266-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78378984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Vitrification of lignite fly ash and metal slags for the production of glass and glass ceramics 用于玻璃和玻璃陶瓷生产的褐煤粉煤灰和金属渣的玻璃化
China Particuology Pub Date : 2006-10-01 DOI: 10.1016/S1672-2515(07)60269-3
A. Karamberi, A. Moutsatsou
{"title":"Vitrification of lignite fly ash and metal slags for the production of glass and glass ceramics","authors":"A. Karamberi, A. Moutsatsou","doi":"10.1016/S1672-2515(07)60269-3","DOIUrl":"https://doi.org/10.1016/S1672-2515(07)60269-3","url":null,"abstract":"","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"10 1","pages":"250-253"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83977627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Novel synthesis of ultrafine hourglass-shaped aluminum hydroxide particles 超细沙漏状氢氧化铝颗粒的新合成方法
China Particuology Pub Date : 2006-10-01 DOI: 10.1016/S1672-2515(07)60270-X
Qiuling Zhou, Ling Zhang, Chunzhong Li, Wei Shao
{"title":"Novel synthesis of ultrafine hourglass-shaped aluminum hydroxide particles","authors":"Qiuling Zhou,&nbsp;Ling Zhang,&nbsp;Chunzhong Li,&nbsp;Wei Shao","doi":"10.1016/S1672-2515(07)60270-X","DOIUrl":"https://doi.org/10.1016/S1672-2515(07)60270-X","url":null,"abstract":"<div><p>In a novel method for synthesizing ultrafine aluminum hydroxide particles presented in this paper, the morphology and crystal structure of the particles were investigated by TEM, XRD, etc. The process consisted of two steps: chemical precipitation by acid and carbonation. The product has an hourglass or half-hourglass morphology with a narrow size distribution of 150-200 nm. Major endothermal peak of decomposition was found at 270°C by differential thermal analysis. X-ray diffraction identified the product as bayerite. Those properties were compared with those of aluminum hydroxide prepared by carbonization only.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 5","pages":"Pages 254-256"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60270-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91762124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Vitrification of lignite fly ash and metal slags for the production of glass and glass ceramics 用于玻璃和玻璃陶瓷生产的褐煤粉煤灰和金属渣的玻璃化
China Particuology Pub Date : 2006-10-01 DOI: 10.1016/S1672-2515(07)60269-3
A. Karamberi, A. Moutsatsou
{"title":"Vitrification of lignite fly ash and metal slags for the production of glass and glass ceramics","authors":"A. Karamberi,&nbsp;A. Moutsatsou","doi":"10.1016/S1672-2515(07)60269-3","DOIUrl":"https://doi.org/10.1016/S1672-2515(07)60269-3","url":null,"abstract":"<div><p>This work focuses on the production of glass and glass-ceramics by using industrial wastes or by-products, e.g., two fly ashes from the combustion of lignite, a slag from the production of Fe-Ni and a slag from the making of steel. Vitrification took place at 1 350°–1 450°C and crystallization was achieved by heat treatment at 900, 950 and 1 000°C. The capability of the waste to be vitrified and subsequently devitrified was determined by XRD techniques. The crystalline phase depends greatly on the structure of the by-product and the heat treatment. The final products showed low leachability and good hardness.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 5","pages":"Pages 250-253"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60269-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91684270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Hydrodynamic resistance effect of fluid layer between two immersed approaching particles 两个浸入式接近粒子间流体层的水动力阻力效应
China Particuology Pub Date : 2006-10-01 DOI: 10.1016/S1672-2515(07)60264-4
Yanpeng Li , Bofeng Bai
{"title":"Hydrodynamic resistance effect of fluid layer between two immersed approaching particles","authors":"Yanpeng Li ,&nbsp;Bofeng Bai","doi":"10.1016/S1672-2515(07)60264-4","DOIUrl":"10.1016/S1672-2515(07)60264-4","url":null,"abstract":"<div><p>A three-dimensional direct simulation of an immersed solid particle approaching another particle, or a flat wall, is conducted to investigate the mechanics of hydrodynamic impact of immersed particles. The simulation method is based on a modified immersed boundary method using a fixed grid system. When the particle separation distance becomes smaller than grid spacing, to account for the hydrodynamic resistance effect of liquid layer between particles near contact, a microlayer model is developed to allow determination of the pressure profile within the micro-layer without neglecting the inertial force of the layer flow. The pressure force is then taken into account in equation of particle motion. Comparisons of the simulation results with the experimental results reported in the literature are shown to substantiate the model presented in this study. The simulations reveal the complex three-dimensional flow field of the liquid and the motion of the approaching particle. The fluid pressure in the gap caused by the unsteady motion of the particle is significantly increased when the separation distance of particles is less than about one-tenth diameters of particle. Therefore the velocity of approaching particle starts to decrease due to the hydrodynamic resistance force at this position.</p></div>","PeriodicalId":100239,"journal":{"name":"China Particuology","volume":"4 5","pages":"Pages 220-228"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1672-2515(07)60264-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81610798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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