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Ecology, distribution, food, trapping and domestication techniques of cane rats Thryonomys spp in Southeastern Nigeria 尼日利亚东南部蔗鼠的生态、分布、食物、诱捕和驯化技术
Pub Date : 2006-10-24 DOI: 10.4314/GJES.V5I1.2464
M. Dike
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引用次数: 0
Phytoremediation innovative technology (series 1): a short-term comparative analysis of remediation potential of macrophytic agro-forestry species in a water-habitat relationship of a crude oil polluted terrestrial habitat 植物修复创新技术(系列1):原油污染陆地生境水生境关系下大型农林植物物种修复潜力的短期对比分析
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2454
N. Edwin-Wosu
A short-term ecological study was conducted on the use of Agro-Forestry Species ( Leucaena leucocephala , Lam de. Wit and Bauhinia monandra ,Kurz) in enhancing water infiltration of a crude oil polluted terrestrial habitat. B. monandra treated soil had no significant effect on water infiltration. Water infiltration was retarded, with the time ranging between 3-43 minutes. While L. leucocephala treated soil had a significant infiltration rate ranging between 4-12 minutes. The implication of these for the environmental quality enhancement has also been buttressed by the ANOVA with B.monandra infiltration time significantly higher (3.85) than L. leucocephala (1.50) at P≤0.05 (3.49) level of significance. Keywords : Leucaena leucocephala, Bauhinia monandra , phytoremediation, crude oil, water infiltration Global Journal of Environmental Sciences Vol. 4(2) 2005: 135-138
利用农林复合树种(Leucaena leucocephala, Lam de. Wit和Bauhinia monandra,Kurz)对原油污染的陆地生境进行了短期生态学研究。山楂处理土壤对水分入渗无显著影响。渗水缓慢,时间在3 ~ 43分钟之间。而白头草处理土壤的入渗速率在4 ~ 12 min之间显著。在P≤0.05(3.49)的显著水平上,毛茛的入渗时间(3.85)显著高于白头草(1.50)。关键词:银合欢,紫荆花,植物修复,原油,水渗透,环境科学,Vol. 4(2), 2005: 135-138
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引用次数: 2
Socio–economic and environmental impact of crude oil exploration and production on agricultural production: a case study of Edjeba and Kokori communities in Delta State of Nigeria 原油勘探和生产对农业生产的社会经济和环境影响:尼日利亚三角洲州Edjeba和Kokori社区个案研究
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2461
O. Agbogidi, B. Okonta, D. Dolor
The study examined the socio-economic and environmental impact of oil exploration on agriculture with particular reference to Edjeba and Kokori communities of Delta State, Nigeria. Both communities are oil-producing communities and agriculture constitutes the primary income generating activities of the indigenes. A 15 item close-ended questionnaires was used to elicit responses from 100 animal, crop and fish farmers. This sample was made up of 55 and 45 farmers randomly drawn from Edjeba and Kokori communities respectively. The results showed that oil exploration and production activities have caused damage to farmlands and water bodies as a result of oil spillage leading to a decrease in agricultural output and hence the income earning capacity of the people has declined appreciably. The results also showed an increase in the occurrence of health hazard, air/noise pollution and heightened deforestation in these communities. It is recommended that regular inspection of oil pipelines, monitoring of oil fields, adequate and timely compensation payments, provision of farm inputs including agricultural extension services and improved seeds be made available to host communities for improved agricultural production. Keywords : socio-economic effects, environment impact, oil production, agriculture, Delta State Global Journal of Environmental Sciences Vol. 4(2) 2005: 171-176
该研究审查了石油勘探对农业的社会经济和环境影响,特别涉及尼日利亚三角洲州的Edjeba和Kokori社区。这两个社区都是产油社区,农业是土著居民的主要创收活动。一份包含15个项目的封闭式问卷被用于从100名动物、作物和鱼类养殖者中获取反馈。该样本由分别从Edjeba和Kokori社区随机抽取的55名和45名农民组成。结果表明,石油勘探和生产活动对农田和水体造成了破坏,导致农业产量下降,居民的收入能力明显下降。结果还表明,这些社区的健康危害、空气/噪音污染和森林砍伐加剧的发生率有所增加。建议向东道社区提供定期检查输油管道、监测油田、适当和及时的赔偿、提供农业投入,包括农业推广服务和改良种子,以改善农业生产。关键词:社会经济效应,环境影响,石油生产,农业,三角洲国家全球环境科学Vol. 4(2) 2005: 171-176
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引用次数: 34
Heavy metals concentrations in the biophysical environment around the Ni-Cu mine and the smelter/concentrator plant, Selebi Phikwe, Botswana 博茨瓦纳Selebi Phikwe镍铜矿和冶炼厂/选矿厂周围生物物理环境中的重金属浓度
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2448
G. Ekosse
The present work involves the study of heavy metals concentrations in the biophysical environment of a Ni-Cu mining and smelting area in Botswana, Africa. Samples of tailings dump, soils, particulate air matter (PAM), Imbrasia belina , and Colophospermum mopane were analysed for concentrations of heavy metals. Elements analysed were those associated with Ni-Cu mining and smelting included Cd, Cr, Co, Cu, Fe, Ni, Se and Zn, which were likely to be found in Ni-Cu orebodies and released into the biophysical environment through mining and smelting activities. Results depicted higher concentration levels of heavy metals in samples obtained close to the mine and the concentrator/smelter plant compared to samples obtained further away from where mining and smelting activities are being carried out. It is anticipated that these findings may be useful in interpreting biophysical environments where Ni-Cu mining and smelting activities are being conducted. Keywords : Selebi Phikwe, biophysical, heavy metals, environment Global Journal of Environmental Sciences Vol. 4(2) 2005: 97–110
目前的工作涉及研究非洲博茨瓦纳一个镍铜采矿和冶炼地区生物物理环境中的重金属浓度。分析了尾矿库、土壤、空气颗粒物(PAM)、绿藓属(Imbrasia belina)和绿藓属(Colophospermum mopane)的重金属浓度。分析的元素包括Cd、Cr、Co、Cu、Fe、Ni、Se和Zn,这些元素可能存在于镍铜矿体中,并通过开采和冶炼活动释放到生物物理环境中。结果显示,在靠近矿山和选矿厂/冶炼厂获得的样品中重金属的浓度水平高于远离采矿和冶炼活动进行地点获得的样品。预计这些发现可能有助于解释正在进行镍铜采矿和冶炼活动的生物物理环境。关键词:Selebi Phikwe,生物物理,重金属,环境,环境科学,Vol. 4(2), 2005: 97-110
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引用次数: 5
Microbial survey of insect-pests on refuse in five major towns of Ondo State, Nigeria 尼日利亚翁多州五个主要城镇垃圾昆虫微生物调查
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2453
F. C. Akharaiyi, O. F. Omoya
Eight insects were identified as pests of the refuse in the five major towns in Ondo State, Nigeria. The insects are: ant ( Psilocephala aldrichi conquillet ), lady bird beetle ( Hyppodamia convergen ), honey bee ( Apis mellifera ), woodroach ( Parcoblatasp ), cockroach ( Blatta orientallis ), housefly ( Musca domestica ), dung beetle ( Canthon pilularis ) and wood cricket ( Nemobius sylverstris ). From these Insects, fourteen bacteria and thirteen fungi species were recovered and identified. The internal part (gut) of the insect-pests were found to contain more bacterial load than the external part while fungal load was more on the external parts than the internal. Among the identified insect-pests, Canthon Pilularis was found to be more implicated of harbouring bacteria while Nemobius sythestris harbored more fungal load than other. Musca domestica had the highest population of 61.5% while Hypodamia convergen had the least of 0.6%. However, the recovery of microorganisms from the insects in the surveyed refuse, highlights microbial presence and species in the environment where they were collected. There is of course the tendency of these insects contaminating foods and other materials to effect transmission of disease(s) to man, animal and plants. Keywords : microbial, insect-pests, refuse, towns, survey Global Journal of Environmental Sciences Vol. 4(2) 2005: 131-134
在尼日利亚翁多州5个主要城镇的垃圾中发现了8种害虫。昆虫包括:蚂蚁(Psilocephala aldrichi conillet)、瓢虫(Hyppodamia convergen)、蜜蜂(Apis mellifera)、木蟑螂(Blatta orientallis)、家蝇(Musca domestica)、屎壳虫(Canthon pilularis)和木蟋蟀(Nemobius sylverstris)。从这些昆虫中分离鉴定出14种细菌和13种真菌。昆虫的内脏(肠道)细菌负荷大于外内脏,真菌负荷大于外内脏。在已鉴定的害虫中,毛细孔虫(Canthon Pilularis)最可能携带细菌,而合成奈比乌斯(Nemobius synthestris)的真菌载量最大。家蝇种群数量最多,为61.5%,会聚低足蝇种群数量最少,为0.6%。然而,从被调查的垃圾中的昆虫中回收微生物,突出了微生物在收集它们的环境中的存在和种类。当然,这些昆虫有可能污染食物和其他材料,从而导致疾病向人类、动物和植物传播。关键词:微生物,害虫,垃圾,城镇,调查。环境科学Vol. 4(2) 2005: 131-134
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引用次数: 0
Modelling of groundlevel particulate concentration from an industrial chimney 工业烟囱地面颗粒物浓度模拟
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2456
N. E. Nwaiwu, S. Kwaghe
Increase in demand for cement has been created as a result of rapid industrialization. Cement production is not without its environmental pollution problems. The pollutants released in a cement industry include oxides of nitrogen, and sulphur, and particulates and volatile organic compounds. Elevated particulate concentrations in conjunction with oxides of sulphur is responsible for rises in respiratory tract diseases. To easily predict maximum ground level particulate concentrations in the atmosphere,models have been generated in this work. Six models having coefficient of determination (r 2 ) values ranging between 0.9735 to 0.9976 have been developed for a range of weather conditions for predicting maximum ground level particulate concentrations as a function pf chimney height. Keywords : particulates, cement industry, maximum ground level concentration, gaussian plume model Global Journal of Environmental Sciences Vol. 4(2) 2005: 147-149
快速工业化造成了对水泥需求的增加。水泥生产并非没有环境污染问题。水泥工业排放的污染物包括氮氧化物、硫氧化物、微粒和挥发性有机化合物。微粒浓度升高加上硫的氧化物是呼吸道疾病增加的原因。为了容易地预测大气中最大的地面颗粒浓度,在这项工作中产生了模型。已经开发了六个模型,其决定系数(r2)值在0.9735至0.9976之间,用于预测作为烟囱高度函数的最大地面颗粒物浓度。关键词:颗粒,水泥工业,最大地面浓度,高斯羽流模型。环境科学学报,Vol. 4(2) 2005: 147-149
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引用次数: 0
Monitoring air pollutants due to gas flaring using rain water 利用雨水监测燃气燃烧产生的空气污染物
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2451
A. Rim-Rukeh, Go Ikiafa, Pa Okokoyo
The paper assessed major air pollutants resulting from gas flaring using rainwater. Rainwater samples were collected during the dry and wet seasons (2002/2003) and analyzed for physico-chemical characteristics such as, pH, TDS, conductivity, NO 3- , CO 3 2- and SO 4 2- . The mean values for the studied parameters during the dry season were pH (5.3) conductivity (20.50 µs/cm), TDS (17.13 mg/L), NO 3- (23 mg/L), S0 4 2- (1.41/ mg/L) and CO 3 2- (16.97 mg/L) and that for wet season were; pH (6.1), conductivity (19.60µs/cm), TDS (16.56mg/L), NO 3- (24mg/L), CO 3 2- (16.13mg/L) SO 4 2- (1.29mg/L). The mean levels of conductivity, TDS, and SO 4 2- were within statutory safe limits, while that of pH, CO 3 2- and NO 3- were above the safe limits specified by the Federal Ministry of Environment guidelines and standards for drinking water quality. Keywords : rainwater, gas flare, pollutants, monitoring, water quality Global Journal of Environmental Sciences Vol. 4(2) 2005: 123–126
本文评估了利用雨水燃烧天然气所产生的主要空气污染物。在干湿季节(2002/2003)收集雨水样本,分析其理化特征,如pH、TDS、电导率、no3 -、co32 -和so42 -。枯水期研究参数的平均值分别为pH(5.3)、电导率(20.50µs/cm)、TDS (17.13 mg/L)、no3 - (23 mg/L)、s42 - (1.41/ mg/L)和co32 - (16.97 mg/L);pH(6.1),电导率(19.60µs/cm), TDS (16.56mg/L), no3 - (24mg/L), co32 - (16.13mg/L), so42 - (1.29mg/L)。电导率、TDS和so4.2 -的平均水平在法定安全范围内,而pH、co3.2 -和no3 -的平均水平高于联邦环境部饮用水质量指南和标准规定的安全范围。关键词:雨水,气体火炬,污染物,监测,水质,环境科学,Vol. 4(2), 2005: 123-126
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引用次数: 5
Fitting probability distributions to component water quality data from a treatment plant 拟合来自处理厂的成分水质数据的概率分布
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2457
E. Nwaiwu, A. Bitrus
The treatment of water is carried out to make the available water meet the standards for its intended use. Such use may be for drinking and other household needs, industries,livestock rearing or fisheries etc. poor quality water is commonly treated to ensure potability. Potable water should be free from unpleasant tastes and odour, have a good appearance and be suitable for domestic as well as a wide range of industrial purposes. Continuous statistical distributions are usually applied to engineering situations. A goodness-of-fit test is usually necessary to determine the fitness of a distribution to specific data. The Kolmogorov-Smirnov test which is a widely used goodness-of-fit measure was used in the work. A total of four continuous distributions namely normal, log normal, gamma and weibuill were employed for data obtained from effluents of coagulation/clarifying process, (settled water), filtration (filtered water) as well as chlorination process (final water). For the settled water, colour and turbidity are lognormally distributed while pH is normally distributed; filtered water has colour, turbidity, free chlorine and total chlorine log normally distributed while pH has gamma distribution for best fit. The log normal distribution fitted all the parameters undertaken for the final water. Keywords : water, treatment plant, clarifier, filter, distributions Global Journal of Environmental Sciences Vol. 4(2) 2005: 151-154
对水进行处理,使可用的水达到其预期用途的标准。这种用途可用于饮用和其他家庭需要、工业、牲畜饲养或渔业等,通常对劣质水进行处理以确保可饮用。饮用水应该没有难闻的味道和气味,外观良好,适合家庭和各种工业用途。连续统计分布通常应用于工程场合。通常需要进行拟合优度检验来确定分布与特定数据的适合度。本文采用了广泛使用的拟合优度测量方法Kolmogorov-Smirnov检验。从混凝/澄清过程(沉淀水)、过滤(过滤水)和氯化过程(最终水)中获得的数据共采用正态分布、对数正态分布、伽玛分布和威布尔分布四种连续分布。沉淀水颜色、浊度为对数正态分布,pH为正态分布;过滤后的水具有颜色,浊度,游离氯和总氯对数正态分布,而pH值具有最佳拟合的伽马分布。对数正态分布拟合了最终水的所有参数。关键词:水,处理厂,澄清器,过滤器,分布,环境科学Vol. 4(2) 2005: 151-154
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引用次数: 2
Influence of poverty on forest / forest management policies of Cross River National Park, Akamkpa 贫困对阿坎巴克罗斯河国家公园森林/森林管理政策的影响
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2462
E. M. Ushie
This research attempts to investigate and examine the influence of poverty on forest/forest management in the rural areas of Mbarakpa, Igbofia, Uyanga, Oban, Nsan and Obutong in Akamkpa Local Government Area of Cross River State. The population of this study comprised the total number of 620 household heads in the six communities. The primary objective of this study was to investigate factors responsible for high poverty rate in the rural areas that has made the application of forest management policies unworkable. Analysis of data from the 150 sampled household heads in the study area revealed that the level of poverty and general standard of living in the study area are highly deplorable, leading to high rate of forest exploitative drive. The study further indicated that majority (68.67 percent) of the sampled respondents had no gainful employment, hence the propensity for forest resource exploitation. It showed further that about 77.33 percent of the sampled respondents were ignorant of the forest bye-laws. Based on these findings, it was recommended that the rural people in the study area should be empowered to take active part in sustainable management of the forest as this would help to reduce the level of poverty. Also other sources of income and nutrition (example, fish and snail farming) apart from forest resources should be developed and encouraged. Keywords : rural poverty, forest management policies Global Journal of Environmental Sciences Vol. 4(2) 2005: 177-180
这项研究试图调查和审查贫困对克罗斯河州阿坎帕地方政府地区姆巴拉帕、伊博菲亚、乌扬加、奥班、恩桑和奥布通农村地区森林/森林管理的影响。这项研究的人口包括6个社区620户户主的总数。这项研究的主要目的是调查造成农村地区高贫困率的因素,这些因素使森林管理政策的实施无法实施。对研究地区150个抽样户主的数据进行的分析表明,研究地区的贫困程度和一般生活水平非常令人遗憾,导致森林采伐率很高。研究进一步表明,大多数(68.67%)的抽样调查对象没有有报酬的工作,因此有开发森林资源的倾向。进一步表明,77.33%的抽样调查对象对森林法规一无所知。根据这些调查结果,建议应授权研究地区的农村人民积极参与森林的可持续管理,因为这将有助于减少贫穷程度。此外,除森林资源外,还应发展和鼓励其他收入和营养来源(例如养鱼和蜗牛)。关键词:农村贫困,森林经营政策,环境科学,Vol. 4(2), 2005: 177-180
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引用次数: 0
Solid waste as an alternative energy source and a means of solving waste disposal problem in Nigeria 固体废物作为一种替代能源和解决尼日利亚废物处理问题的手段
Pub Date : 2006-03-08 DOI: 10.4314/GJES.V4I2.2449
Bukola Olalekan Bolaji
This paper presents practical ways of generating energy from solid waste as a means of solving the problem of solid waste disposal which is confronting the major cities in Nigeria and also providing alternative energy source to supplement the high cost and fast depleting conventional sources of energy. It also discussed the conventional incineration, gasification and pyrolysis processes in which energy may be recovered from solid wastes and put to useful purposes. Keywords : solid waste, energy, waste disposal, incineration Global Journal of Environmental Sciences Vol. 4(2) 2005: 111–114
本文提出了从固体废物中产生能源的实用方法,作为解决尼日利亚主要城市所面临的固体废物处理问题的一种手段,也提供了替代能源,以补充高成本和快速消耗的常规能源。它还讨论了传统的焚烧、气化和热解过程,这些过程可以从固体废物中回收能源并用于有用的目的。关键词:固体废物,能源,垃圾处理,焚烧。环境科学Vol. 4(2) 2005: 111-114
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引用次数: 0
期刊
Global Journal of Environmental Sciences
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