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Assessment of Cement Dust Deposit in a Cement Factory in Cotonou (Benin)

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Journal of Environmental Protection 2015年第7期6卷 675-682页

作者： Theodore Soussia Patient Guedenon Rafiou Lawani Claudia Doutetien gbaguidi Patrick A. Edorh medical and Health National Institute University of Abomey Calavi Cotonou Benin military and Teaching Hospital/Center of University Hospital Cotonou Benin Research Laboratory in Biochemistry and Environmental Toxicology Department of Cell Biology and Biochemistry Faculty of Science and Technology University of Abomey Calavi Cotonou Benin School of Health sciences Houdegbe North American University of Benin Cotonou Benin Faculty of Science of Health University of Abomey Calavi Cotonou Benin

In order to assess the cement dust levels at the factory of the Beninese Cement Industry (BCI), at Xwlacodji, seven sampling stations (numbered 1 to 7) were set inside the industry and nine (numbered 8 to 16) were set around the factory in January, February, August and December. With the method of stainless steel plate according to NFX 43-007 AFNOR Standard, the different stations were monitored daily for dust collection all month long. The results revealed that the mean values of cement dusts inside BCI in g/m2/day ranged from 1.608 to 8.752 in January, from 1.13068 to 6.14924 in February, from 0.9654 to 5.2502 for August and from 1.7220 to 9.3620 for December. With regard to outside BCI, the mean values of dusts rose from 8.8760 to 18.9620 in December. The lowest mean values 3.2719 and 4.4124 were respectively recorded in February and August whereas the highest values 17.7309 and 18.9620 were respectively recorded in January and December. Our study revealed month variation in cement dust deposition with the highest values in December and January and the lowest values in February and August. It was observed that the content in cement dusts recorded outside the cement industry were extremely higher than those recorded inside the cement industry. The values in the present study have far exceeded all the international safety values (1 g/m2/day for AFNOR and 350 mg/m2/day TA-Luft) and could pose health hazards. Therefore protective measures are suggested to mitigate the risk of occupational hazards for the cement industrial workers.

关键词： Cement Dust Factory Xwlacodji Health Hazards

microstructural, Chemical and mineralogical Analyses for Understanding the Geotechnical Properties of Clayey Soils

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Journal of minerals and materials Characterization and Engineering 2016年第6期4卷 305-319页

作者： Yvette Tankpinou Kiki Nadia Saiyouri Victor gbaguidi Yannick Anguy Cécile Gaborieau Richard Fabre Institut de mécanique et d’ Ingénierie (I2m) Université de Bordeaux Talence Cedex France Laboratoire d’ Energétique et de mécanique Appliquée Université d’Abomey-Calavi Cotonou Bénin

This paper presents a study research in the laboratory of three clayey soils from the depression of the Lama, a tropical climate area where disorders appear on construction and roads. Samples were tested to establish the relationship between their mineralogy and their geotechnical properties. On the three clayey soils, analyses were performed to characterize the macroscopic behavior (physical tests, free swelling test and compressibility tests) and the microstructural, chemical and mineralogical characterizations by thermal analysis, chemical analysis, X-Ray diffraction, Scanning Electron microscopy observations complementary X-ray EDS analyses. At first glance, the results of physical and compressibility tests appear not to be consistent with the free swelling test results. Indeed, these results highlighted differences in the behaviors of the samples because the swelling potential revealed by the results of physical and compressibility test does not follow the same trend as the one given by the free swelling test result. The main clay minerals in the studied clayey soils varied from fibrous clays (palygorskite) to best-known clays such as smectite and kaolinite. microstructural, chemical and mineralogical analyses allowed to understand and explain the different trends obtained by the different types of geotechnical characterization tests of studied clayey soils.

关键词： Geotechnical mineralogical microstructural Free Swelling Index Smectite Palygorskite Clayey Soils

基于激光雷达数据的奥运大气污染控制效果评估

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科学通报 2010年第10期55卷 931-936页

作者：杨婷王自发张柏王喜全王威 gbaguidi Alex 龚晏邦中国科学院东北地理与农业生态研究所、地理遥感信息研究中心长春130012 中国科学院大气物理研究所、大气边界层物理与大气化学国家重点实验室/竺可桢/南森国际研究中心北京100029 中国科学院研究生院北京100049

为有效评估2008年奥运会期间北京本地及周边地区的大气污染控制效果,利用双波长偏振激光雷达观测数据,分析研究了奥运会期间北京地区气溶胶消光系数的演变规律.结果表明:(1)在气象要素几乎相同的情况下,2008年奥运会期间近地面(250m以下... 详细信息

为有效评估2008年奥运会期间北京本地及周边地区的大气污染控制效果,利用双波长偏振激光雷达观测数据,分析研究了奥运会期间北京地区气溶胶消光系数的演变规律.结果表明:(1)在气象要素几乎相同的情况下,2008年奥运会期间近地面(250m以下)消光系数较2007年同期下降了42.3%,这表明北京本地污染控制措施对改善奥运会期间的空气质量起到了明显的作用.(2)通过对比分析奥运会前(2008年7月20日～8月7日)与奥运会期间(2008年8月8～24日)气溶胶消光系数的变化,发现奥运会期间消光系数日均值在边界层中上层(0.5～1.5km)减少显著.为解释此现象,利用NAQPmS模式分别模拟了北京周边地区在奥运会前与奥运期间对北京地区大气污染物的输送状况,发现Pm10的输送量在奥运期间有36.6%的削减,这表明北京周边地区污染控制措施对改善奥运会期间的空气质量也起到了重要作用。

关键词：激光雷达消光系数大气污染污染控制效果评估 NAQ PmS

2008北京奥运会前后城区黑碳气溶胶浓度的变化特征

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气候与环境研究 2010年第5期15卷 616-623页

作者：潘小乐王自发王喜全董华斌张伟 gbaguidi Alex 黄江平中国科学院大气物理研究所竺可桢-南森国际研究中心北京100029 中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室北京100029 中国科学院研究生院北京100049

利用model-5012型黑碳仪观测的大气中黑碳气溶胶的浓度资料,结合北京城区环保控制措施和气象资料,分析了2008北京奥运会前后和奥运会期间黑碳气溶胶浓度变化的主要影响因子。结果表明,7月20日前(北京城区无机动车单双号控制),大气中黑... 详细信息

利用model-5012型黑碳仪观测的大气中黑碳气溶胶的浓度资料,结合北京城区环保控制措施和气象资料,分析了2008北京奥运会前后和奥运会期间黑碳气溶胶浓度变化的主要影响因子。结果表明,7月20日前(北京城区无机动车单双号控制),大气中黑碳气溶胶的特征浓度为3.4μg.m-3;实施机动车单双号控制后至奥运会前(7月20日至8月7日),该特征值增加至3.9μg.m-3;奥运会期间[8月8日00时(北京时间,下同)至24日23时]城区黑碳气溶胶浓度有明显下降,为2.5μg.m-3,比奥运会前下降了31%。对同期气象观测数据的分析表明,奥运会期间北京周边降雨量明显增大,偏北风出现的频次也从奥运会前的24.1%提高至38.8%。另外,八达岭高速路健翔桥段的机动车监测数据显示,奥运会期间进、出北京的机动车流量有所降低,上下班高峰期机动车流量减少了约30%,这也是奥运会期间黑碳气溶胶浓度降低的重要原因。

关键词：黑碳气溶胶机动车流量控制气象要素北京奥运会

奥运会开幕前后北京Pm10输送通量变化及情景分析

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气候与环境研究 2010年第5期15卷 652-661页

作者：王威王自发吴其重 gbaguidi Alex 张伟晏平仲杨婷中国科学院大气物理研究所竺可桢-南森国际研究中心北京100029 中国科学院研究生院北京100049 中国科学院大气物理研究所大气边界层与大气化学国家重点实验室北京100029

利用嵌套网格空气质量预报系统(NAQPmS)的模拟结果,对奥运会开幕前后京津冀地区(2008年7月20日～8月24日)Pm10(空气动力学当量直径小于等于10μm颗粒物)输送特征进行计算与分析。结果表明,气象条件的改变使得在南、东南和东三个方向输... 详细信息

利用嵌套网格空气质量预报系统(NAQPmS)的模拟结果,对奥运会开幕前后京津冀地区(2008年7月20日～8月24日)Pm10(空气动力学当量直径小于等于10μm颗粒物)输送特征进行计算与分析。结果表明,气象条件的改变使得在南、东南和东三个方向输入北京地区的Pm10通量在数值与分布上发生了较大幅度改变。开幕式前Pm10主要自南部边界输送入北京,占输入总通量的55.8%,东南边界次之,占29.4%;奥运期间,二者贡献分别变为38.1%和47%,且入京总通量小时均值由50t下降为40.2t。垂直方向上,开幕式前输送能力最大的区间位于边界层中下部,奥运期间(8月8日～24日)边界层内输送的垂直分布较为平均。另外,结合2006年同期气象场及排放清单,通过替换的方法对奥运会期间的空气质量状况进行了情景模拟,结果表明:气象场的变化在Pm10区域输送中起着决定性的作用,但在空气质量的改善方面,污染源减排的效果更为明显。

关键词：北京奥运会可吸入颗粒物减排输送通量

Evaluation of the Effectiveness of “Electron Go out mosquito Small Lamp” in Disease Vector mosquito Control Benin West Africa

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Advances in Entomology 2023年第2期11卷 95-104页

作者： Tatchémè Filémon Tokponnon Phidias gbaguidi Zannou Robert Franck Razaki Osse Sébastien Koudenoukpo mazaire Bata Sare Dabou Zoulkifilou Houessinon Festus Gounou Idayath martin C. Akogbeto Centre de Recherche Entomologique de Cotonou Ministère de la Santé Cotonou Bénin Ecole Polytechnique d’Abomey Calavi Université d’Abomey-Calavi Abomey-Calavi Bénin ministère de la Santé Cotonou Bénin Ecole de Gestion et d’Exploitation des Systèmes d’Elevage Université Nationale d’Agriculture Kétou Bénin

In the context of mosquito control, a plethora of devices have been put on the market. The effectiveness of these devices is not always proven, but some have interesting principles that have the potential to be a good means of mosquito control. Among these interesting devices are the photonic traps. We have carried out nightly captures of mosquitoes on human baits in the presence and absence of the device. These captures were made during the rainy season in the localities of Zogbadjè and mènontin. The captures were made under the same atmospheric conditions at the same locations at 5-day intervals. These captures were made twice per house, indoors and outdoors, with one blank capture without the device and one capture with the device. The captured mosquitoes were identified and classified by genus and their aggressiveness determined by calculating the biting rate. A total of 845 mosquitoes were captured during these captures with 296 mosquitoes captured indoors without the device and 132 mosquitoes with the device present. This represents a decrease of 55.40% in culicidae density. Furthermore, a significant decrease was observed in aggressiveness, from 49 to 22 bites per man per night (b/m/n) with the use of the device. This decrease is even more important for nocturnal species such as Anopheles spp. whose aggressiveness decreased by 90%. The present study confirms the effectiveness of the “Electron go out mosquito small lamp” in reducing Culicidae density and mosquito aggression even in the presence of chemotactic interference. However, this study was limited in time and focused only on the ability of the device to reduce mosquito numbers and did not assess its epidemiological efficacy. It is therefore important to extend the work to examine the influence of the use of this device on population health and the occurrence of mosquito-borne diseases, particularly malaria.

关键词： mosquito Control Electron Go Out mosquito Effectiveness Culicidae Density Phototactism Bénin

Study of the Thermal Characteristics of a Geomaterial:Case of SavèGranites in the Republic of Benin

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Journal of Environmental Science and Engineering(A) 2023年第4期12卷 151-161页

作者： Koffi Judicaël Agbelele Daniel Yemalin Agossou Kocouvi Agapi Houanou Bachir Kolade Adelakoun Ambelohoun Sakala Complice Decoursel Curtis Gérard gbaguidi Aïsse Higher Normal School of Technical Education(ENSET) LokossaRepublic of Benin Laboratory of materials and Structures(LAmS) Verechaguine AK Higher SchoolCotonouRepublic of Benin Laboratory of Energetics and Applied mechanics(LEmA) EPAC UACAbomey-CalaviRepublic of Benin Civil Engineering Testing and Research Laboratory(L2EGC) ENSTPAbomeyRepublic of Benin

This work focuses on the valorization of local *** rock that is granite,a material used in construction thanks to its mechanical resistance,is the subject of our *** granite of the commune of Savè,made it possible to appreciate the thermal behavior of this rock studied with a view to its use as a building *** this end,a thermal diffusivity measurement test was carried out on this ***,we made samples which were then connected to a data acquisition box via thermocouples.A Python script is used to ensure the collection of temperature values over *** this thermal diffusivity test carried out on the granite taken from the Savèbreasts,we obtained an average diffusivity a=5.84×10^(-6)m^(2)/*** a result,the thermal effusivity and the heat capacity of the material were determined having respectively the value 1,351.09 J/(K·m^(2)·s^(1/2))and 547,945.21 J/(m^(3)·K).These different results highlight a thermal characterization of Savègranites as a relevant material in the design and construction of an energy-efficient eco-housing.

关键词： Local materials thermal diffusivity thermal conductivity thermal effusivity heat capacity

Evaluation and mastery of the Risks of Swelling of Clayey Soils of the Kho Depression in the South-Benin

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材料科学与工程（中英文A版） 2018年第4期8卷 166-172页

作者： Gérard L. gbaguidi Aisse Ernesto C. Houehanou Yvette Tankpinou Kiki Koffi J. Agbelele Abalo P. Kla Gérard Degan Laboratory of materials and Structures (LAmS) Cotonou Benin Laboratory of Energetics and mechanics Applied (LEmA) (EPAC) UAC Abomey-Calavi Benin National University of Sciences Technologies Engineering and Mathematics (UNSTIM) Abomey Benin National School of Engineers (ENSI) University of Lome (UL) BP 1515 Lome Togo