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Environmental Profile of CBA (Copper-Boron-Azole)-Treated Wooden Utility Poles: A Developing Country Case CBA(铜硼唑)处理木制电线杆的环境概况:一个发展中国家的案例
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105021223
Jacques Michel Njankouo, G. D. Nimpa, D. Ntamack, T. Tatietse
Wood poles are popular and are used worldwide in the power supply industries because of their high strength per unit weight, low installation and maintenance costs, and local availability. However, the environmental sustainability which is another required criterion to appreciate the whole quality of wood utility poles has until now not received attention from the developing countries’ research community. To overcome this lack of interest, this study investigates the gate-to-grave life cycle environmental impacts, related to CBAtreated wooden utility poles used for electricity distribution in a developing country for primary environmental characterization of wood pole related operations. The gate-to-grave LCA covered four life stages of wood utility pole: shaping, treatment, in-service, and final disposal. Five impact categories have been assessed based on an extensive primary data search through a detailed life cycle inventory. Cameroon was taken as the case study and life stage operation data were taken from the national utility company while inputs and outputs emissions data were taken from literature. Impact category scores were expressed per functional unit which was taken as one 9 m eucalypt saligna pole processed and used in power distribution line with a lifetime of 30 years. The results showed that the following scores of 65.60 kg CO2-eq for global warming, 0.76 kg SO2-eq for acidification, 0.08 kg C2H4-eq for photochemical ozone formation, 2.00 kg 1,4-DB-eq for ecotoxicity, and 60.67 kg for solid waste have been recorded as environmental profile characterization values of a wood utility pole. Furthermore, activities related to the wood pole treatment have been identified as the most environmentally harmful with regard to global warming, acidification, and photochemical ozone formation, while in-service and final disposal life stages recorded the highest values in ecotoxicity and solid waste respectively. In spite of the fact that this study was based both on Cameroonian experience and on worldwide used primary emission data, it yielded good quality data unique for power pole LCA research in third world.
木杆很受欢迎,并在全球范围内用于供电行业,因为它们的单位重量强度高,安装和维护成本低,以及当地的可用性。然而,环境可持续性是评价木制电线杆整体质量的另一个必要标准,迄今为止尚未得到发展中国家研究界的注意。为了克服这种缺乏兴趣的问题,本研究调查了与发展中国家用于配电的经碳处理的木制电线杆有关的从门到门的生命周期环境影响,以了解木杆相关操作的主要环境特征。从大门到坟墓的LCA涵盖了木电线杆的四个生命阶段:成型、处理、使用和最终处置。通过详细的生命周期清单进行广泛的原始数据搜索,评估了五个影响类别。喀麦隆作为案例研究,生命阶段运行数据取自国家公用事业公司,而输入和输出排放数据取自文献。影响类别得分表示为每个功能单元,该功能单元取一根9米长的桉树木杆加工并用于寿命为30年的配电线路。结果表明,木质电线杆的环境剖面表征值为:全球变暖的CO2-eq值为65.60 kg,酸化的CO2-eq值为0.76 kg,光化学臭氧形成的CO2-eq值为0.08 kg,生态毒性的CO2-eq值为2.00 kg,固体废物的CO2-eq值为60.67 kg。此外,在全球变暖、酸化和光化学臭氧形成方面,与木杆处理有关的活动已被确定为对环境最有害的活动,而在使用和最后处置生命阶段分别记录了最高的生态毒性和固体废物值。尽管这项研究是基于喀麦隆的经验和世界范围内使用的主要排放数据,但它为第三世界的电线杆LCA研究提供了独特的高质量数据。
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引用次数: 0
Seasonal Variation in the Physicochemical Characteristics and Microalgae of Selected Mangrove Ecosystems in Ernakulam 额尔纳库拉姆红树林生态系统理化特征及微藻的季节变化
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105030105
K. AquilineAns., Romilly Margaret Mendez
The present study was carried out to determine the physicochemical characteristics of water and the diversity of microalgae in three different mangrove ecosystems of Ernakulam district for a period of one year. Surface water temperatures varied from 30 0 C to 32 0 C. The pH ranged from 7.1 to 8.4 at all the stations during the course of study. The variation in the dissolved oxygen ranged from 0.48 to 1.28 mg/l, carbon dioxide from 0.88 to 3.6 ppm, alkalinity ranged from 15 to 20 ppm and the dissolved chloride ions ranges from 7.28g/l to 8.07 g/l. Concentrations of nutrients viz. phosphate (10.3 to 93.6 μg/l), nitrate (28.6 to 110.6 μg/l), varied independently their concentration recorded its maximum during the post monsoon period at all the stations studied. The presence of 18 different genera from Cyanophyceae, Chlorophyceae and Bacillariophyceae was recorded in the three stations. Oscillatoria, Chlorella and Navicula were the dominant species at all the three stations investigated.
本研究在为期一年的时间里,对厄纳库拉姆地区3个不同红树林生态系统的水体理化特征和微藻多样性进行了研究。地表水温度在30 ~ 32℃之间变化,pH值在7.1 ~ 8.4之间变化。溶解氧变化范围为0.48 ~ 1.28 mg/l,二氧化碳变化范围为0.88 ~ 3.6 ppm,碱度变化范围为15 ~ 20ppm,溶解氯离子变化范围为7.28 ~ 8.07 g/l。磷(10.3 ~ 93.6 μg/l)、硝(28.6 ~ 110.6 μg/l)等营养物质的浓度在季风后期均有独立变化,其浓度在季风后期达到最高值。3个站点共发现蓝藻科、绿藻科和硅藻科18个属。3个站点的优势种均为振荡藻、小球藻和Navicula。
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引用次数: 0
Effects of Occupational Safety and Health Hazards’ Exposure on Work Environment in the Water Service Industry within Kisumu County - Kenya 肯尼亚基苏木县供水行业职业安全和健康危害暴露对工作环境的影响
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105014651
I. Oluoch, J. Ndeda, P. Njogu
The study sought to determine effects of exposure to occupational safety and health hazards on work environment in the Kenyan Kisumu County Water Service industry. The study utilized a descriptive research design. The target population consisted of employees of Kisumu Water and Sewerage Company (KIWASCO) and Lake Victoria South Water Service Board (LVSWSB) working in water treatment works, waste water treatment plants and construction sites. Questionnaires were used to obtain primary data; that were analyzed using quantitative techniques. Standard deviation was adapted to measure disparity for the likert-scale questionnaires. The entire hypothesis was tested at 95% confidence level. Risk Severity rating was then done for Biological, Chemical, Ergonomics, Physical, Psychological and Safety risks. Results reveal that employees working in the water service industry in Kisumu County are exposed to hazards and risks. Both Biological and Chemical risks are high or major among staff in the water sector. While Ergonomics, Physical and Psychological risks are minor, they are likely to happen in the sector. We recommend that the management of water service industry immediately institute measures to avoid the Biological and Chemical risks, while adequate preparedness should be put in place against other risks.
这项研究旨在确定接触职业安全和健康危害对肯尼亚基苏木县供水服务行业工作环境的影响。本研究采用描述性研究设计。目标人群包括基苏木供水和污水处理公司(KIWASCO)和维多利亚湖南部供水服务委员会(LVSWSB)在水处理厂、废水处理厂和建筑工地工作的雇员。通过问卷调查获得原始数据;使用定量技术进行分析。标准偏差被用来衡量李克特量表问卷的差异。整个假设在95%的置信水平上进行了检验。然后对生物、化学、人体工程学、物理、心理和安全风险进行风险严重程度评级。结果表明,基苏木县供水行业从业人员暴露于危害和风险环境中。水部门工作人员的生物和化学风险都很高或很大。虽然人体工程学、生理和心理风险很小,但它们很可能发生在该行业。我们建议供水行业的管理部门立即采取措施,避免生物和化学风险,同时对其他风险做好充分的准备。
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引用次数: 9
Assessment of Medical Waste Management in Health Centers of Maroua-Cameroon 马鲁阿-喀麦隆卫生中心医疗废物管理评估
Pub Date : 2017-05-01 DOI: 10.9790/2402-11040296107
C. Tsamo, Arbam Tsafam, Poliance Dougoua Djiantio
: Medical waste unlike other ordinary waste does not only poses serious health risk to the handlers, health staff andpatients but also to the environment. Waste management in general and particularly medical waste from health carefacilities is highly neglected in developing countries due to lack of trained personnel and lack of funds to adopt appropriate waste management technologies. In Cameroon, there is very little data available on the management of medical waste. This motivated this paper whose objective was to assess the medical waste managementpractices in health centers (public and private) in Maroua . The study used structured questionnaires, observation checklist and key informant interview guide to collect data fromall health personnel in health centers, local councils and decentralized government services in charge of hospitals and waste management respectively. It was observed that the number of health centers authorized by government is less than those actually operating in the field. Also managers of most health centers have designated some of their personnel or created commissions to manage waste. But nearly all of them have very little knowledge on medical waste management procedures as they are mainly trained by managers of their structures rather than experts. Generally medical waste management practices such as sorting, segregation, collection; treatment and disposal were very rudimentary and obeyed no standard rules.
:与其他普通废物不同,医疗废物不仅对处理者、医务人员和病人的健康构成严重威胁,而且对环境也构成严重威胁。在发展中国家,由于缺乏训练有素的人员和缺乏采用适当的废物管理技术的资金,一般的废物管理,特别是来自卫生保健设施的医疗废物,受到严重忽视。在喀麦隆,关于医疗废物管理的数据很少。这激发了本文的动机,其目的是评估马鲁阿(公共和私人)卫生中心的医疗废物管理做法。该研究采用结构化问卷调查、观察清单和关键信息者访谈指南,分别从保健中心、地方议会和负责医院和废物管理的分散政府服务机构的小型卫生人员那里收集数据。有人指出,政府批准的保健中心数量少于实际在外地运作的保健中心。此外,大多数保健中心的管理人员还指定了一些人员或成立了管理废物的委员会。但他们几乎都对医疗废物管理程序知之甚少,因为他们主要是由其机构的管理人员而不是专家培训的。一般医疗废物管理做法,如分类、隔离、收集;处理和处置非常简陋,没有标准的规则。
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引用次数: 3
Physicochemical Characterization of Coal and its alternative use as a Source of Energy (in case of Yayo Coal Mining Industry) 煤的物理化学特性及其作为能源的替代用途(以Yayo煤矿工业为例)
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105034450
Bizualem Wakuma, Busha Assaba
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引用次数: 3
Determinants of Food Security in the Home on Nutritional Status of Adolescent Students in Abia, State 阿比亚州青少年学生营养状况的家庭粮食安全决定因素
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105014045
A. Nkemdilim, Bassey E. Anam
The study was designed to investigate the determinants of food security in the home and its effect on nutritional status of adolescent’s students in Abia State of Nigeria. Five specific purpose and five null hypotheses were formulated to guide the study. A survey design was used for the study. 2000 students constituted the population while 500 respondents were the sample for the study. The researcher developed instrument named Food Security variables and Students Nutritional Status Questionnaire (FSVS NSQ) was used for data generation. Pearson Product Moment Correlation (PPMC) and Multiple Regression Analysis were used to analyse the five null hypotheses 1, 4 and 5 respectively at 0.05 alpha level and 498 degree of freedom. The findings revealed that there is joint relationship between food availability acceptability, affordability, sustainability and nutritional status of students in Abia State. Some recommendations were made such as School administration should encourage hand-on experiences in agriculture at all levels, as a means of creating awareness among children of the benefits of food production for improved nutritional status and its resultant effects.
本研究旨在调查尼日利亚阿比亚州家庭粮食安全的决定因素及其对青少年学生营养状况的影响。提出了五个具体目的和五个零假设来指导研究。本研究采用问卷调查设计。2000名学生构成了总体,而500名受访者是研究的样本。研究者开发了食品安全变量工具,并使用学生营养状况问卷(FSVS NSQ)进行数据生成。采用Pearson积差相关(PPMC)和多元回归分析分别在0.05 α水平和498自由度下对5个零假设1、4和5进行分析。调查结果显示,在阿比亚州,粮食供应、可接受性、可负担性、可持续性和学生的营养状况之间存在着共同关系。提出了一些建议,例如:学校行政部门应鼓励各级农业方面的实践经验,作为使儿童认识到粮食生产对改善营养状况的好处及其产生的影响的一种手段。
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引用次数: 0
Subsurface Structural Analysis Using Well Logs to Study Faults of the Lower Atokan Formation in the Arkoma Basin, Northcentral Arkansas 利用测井资料对阿肯色州中北部Arkoma盆地下Atokan组断层进行地下结构分析
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105026577
Fatimah T. Alasadi, Wathiq Abdulnaby, D. Zachry
Well logs observations have contributed to our understanding of the subsurface structures of the Arkoma Basin. These observations have led to a new explanation of the relationship between surface and subsurface structure of the basin. About 1500 well logs were used in this study to conduct a subsurface structural analysis of faults in the Arkoma basin of northcentral Arkansas. The Arkoma Basin is one of many petroleum basins in the United States which is structurally characterized by series of normal faults. In this study the faults were analyzed by building a structural contour map for Lower Atokan Formation (about 350 million years in age) and plotting nine cross sections using the well logs. The subsurface contour map shows very good match with the faults in the Arkoma basin. Two master fault zones were recognized in this study; the Mulberry and Clarksville fault zones, with displacement ranges from 1567 feet to 500 feet respectively. These fault zones trend northwest to southeast in the study area with an average strike azimuth of 285°. The principal stress axes that are responsible of forming the faults in the study area were calculated by measuring the attitudes of faults from the subsurface contour map and cross sections. The principal stress axes are represented by the plunge angle and plunge direction. The results show that the directions of the maximum, intermediate, and minimum stress axes of the Mulberry fault are 01°/286°, 69°/195°, 21°/016°, and of the Clarksville fault are 05°/287°, 66°/186°, and 24°/019° respectively. From these values, it can be seen that the two master faults are affected by the same tectonic stress regime. This study reveals a new finding of series of subsurface sub-basin structure in the analyzed area. One of the major sub-basins, named the Bullfrog Sub-basin, reveals tremendous extension about 4 miles to the surface and subsurface to the northcentral part of the area.
测井观测有助于我们了解Arkoma盆地的地下结构。这些观测结果对盆地地表和地下结构之间的关系提出了新的解释。在这项研究中,使用了大约1500口测井曲线,对阿肯色州中北部的Arkoma盆地的断层进行了地下结构分析。Arkoma盆地是美国众多以正断层为构造特征的含油气盆地之一。本研究通过绘制下Atokan组(约3.5亿年)的构造等高线图,并利用测井曲线绘制了9个剖面,对断层进行了分析。地下等高线图与Arkoma盆地的断层吻合良好。研究确定了两个主断裂带;Mulberry和Clarksville断裂带,位移范围分别为1567英尺到500英尺。这些断裂带在研究区内走向为西北至东南,平均走向方位角为285°。根据地下等高线图和断层剖面图,测量断层走向,计算出研究区断裂形成的主应力轴。主应力轴由突向和突向表示。结果表明,桑断裂的最大、中间、最小应力轴方向分别为01°/286°、69°/195°、21°/016°,克拉克斯维尔断裂的最大、中间、最小应力轴方向分别为05°/287°、66°/186°和24°/019°。从这些数值可以看出,两条主断裂受同一构造应力制度的影响。该研究揭示了分析区内一系列地下次盆地构造的新发现。其中一个主要的子盆地,被称为牛蛙子盆地,显示出巨大的延伸约4英里的地表和地下到该地区的中北部。
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引用次数: 1
Epicuticular wax concentration on Syzygium myrtifolium leaves 桃金娘叶表皮蜡浓度
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105025964
M. Isa, N. M. Majid, Sase Hiroyuki, O. Ahmed, Franklin Ragai Kundat, R. K. J. Heng
The pollution issues are a pervasive and increasing threat to human and forest ecosystem. Plants have been recognised as a method to reduce pollution. However, leaf is the most sensitive organ to pollution where changes in leaf morphological, physiological, anatomical and biochemical can occur. This study was conducted to determine the quantity of epicuticular wax on Syzygium myrtifolium leaves in urban, suburban and industrial areas. Three trees were selected in each of the study sites and new leaves on the branch was marked. 5 g of samples were collected for analysis. Leaf surface particles were extracted by using 20 ml of chloroform in conical flask and was left overnight for hardening where weight were recorded. Data analysis showed that the mean epicuticular wax ranged from 267.2-680.7 µg/m2 with a mean increment of 309.6-950.7 µg/m2 /yr. The epicuticular wax concentration on S. myrtifolium leaves was significantly higher in industrial areas compared to those in the urban and suburban areas. S. myrtifolium at industrial areas are in the open and subjected to direct sunlight and also responding to stress caused by the air pollutions. The low concentration of epicuticular wax was recorded on S. myrtifolium leaves in urban area. These trees are subjected to high concentration of pollutants especially from exhaust emissions and possible is due to the aerosol deposition which have been carried by the wind. This initial study reveal that the level of physiological stress on the trees in industrial, suburban and urban areas are at a different scale where the levels of air pollution is different. Understanding the tree traits are important to capitalize their role as bio filters. This study provide the baseline data for future study where the relationship between the particulate matters deposited on the tree canopy and the tree trait could be explained.
污染问题对人类和森林生态系统的威胁日益严重。种植植物已被认为是减少污染的一种方法。然而,叶片是对污染最敏感的器官,在叶片形态、生理、解剖和生化等方面都会发生变化。本研究测定了城市、郊区和工业地区金合桃叶表皮蜡的含量。在每个研究地点选择三棵树,并在树枝上标记新叶。采集5 g样品进行分析。用20毫升氯仿在锥形烧瓶中提取叶片表面颗粒,过夜硬化,并记录重量。数据分析表明,平均表皮蜡含量为267.2 ~ 680.7µg/m2,平均增量为309.6 ~ 950.7µg/m2 /yr。工业地区金缕梅叶表皮蜡含量显著高于城市和郊区。工业区的金桃金娘生长在露天,受到阳光直射,也对空气污染造成的压力做出反应。在城市地区的桃金娘叶上发现了低浓度的表皮蜡。这些树木受到高浓度污染物的影响,特别是来自废气排放,可能是由于风携带的气溶胶沉积。初步研究表明,在工业、郊区和城市地区,树木受到的生理压力程度不同,空气污染程度也不同。了解树的特性对于发挥它们作为生物过滤器的作用非常重要。该研究为进一步研究树冠颗粒物沉积与树木性状之间的关系提供了基础数据。
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引用次数: 0
Distribution and Diversity of Chlorophyceae in Saroornagar Lake, Hyderabad 海得拉巴Saroornagar湖绿藻的分布和多样性
Pub Date : 2017-05-01 DOI: 10.9790/2402-110402114121
K T Padma Priya
The present paper deals with the study of Chlorophyceae in Saroornagar Lake. Samples were collected from four sampling stations for a period of two years and comprehensive physico-chemical analysis was carried out. Linear multiple regression analysis (MRA) has been carried out in evaluating the importance of various physico-chemical variables on the growth and development of Chlorophyceae with SPSS software. The physico-chemical parameters played an important role in distribution and diversity of algae. Higher peaks of green algae were reported during summer and were represented by Chlorella vulgaris, Ankistrodesmusfalcatus, Scenedesmus sp. and Coelastrummicroporum. The species of Ankistrodesmusfalcatus, Chlorella vulgaris and Scenedesmus sp., Pandorinamorum, Actinastrumhantzchii, Pyrobotrysincurva and Micractiniumpusillum confirm eutrophic condition of the lake and act as indicators of organic pollution and represent pollution tolerant species. The indicator species of Chlorophyceae were represented by microphotographs.
本文对萨鲁纳加尔湖的绿藻进行了研究。在为期两年的时间里,从四个采样站采集了样品,并进行了全面的理化分析。利用SPSS软件,采用线性多元回归分析(MRA)评价了各种理化变量对绿藻生长发育的重要程度。物理化学参数对藻类的分布和多样性起着重要作用。绿藻高峰在夏季,以小球藻(Chlorella vulgaris)、Ankistrodesmusfalcatus、Scenedesmus sp.和Coelastrummicroporum为代表。Ankistrodesmusfalcatus、Chlorella vulgaris和Scenedesmus sp.、Pandorinamorum、Actinastrumhantzchii、Pyrobotrysincurva和micractinumpusillum等物种证实了湖泊的富营养化状况,是有机污染的指示物和耐污染物种。蓝藻科指示种用显微照片表示。
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引用次数: 1
Screening Of Plastic Degrading Bacteria from Dumped Soil Area 弃土区塑料降解菌的筛选
Pub Date : 2017-05-01 DOI: 10.9790/2402-1105029398
Omar Saad Jumaah
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引用次数: 16
期刊
IOSR Journal of Environmental Science, Toxicology and Food Technology
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