oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Search Results: 1 - 10 of 360 matches for " Akpofure Rim-Rukeh "
All listed articles are free for downloading (OA Articles)
Page 1 /360
Display every page Item
Physico-Chemical and Biological Characteristics of Stagnant Surface Water Bodies (Ponds and Lakes) Used for Drinking and Domestic Purposes in Niger Delta, Nigeria  [PDF]
Akpofure Rim-Rukeh
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.49106
Abstract:

The surface water quality of some stagnant water bodies (ponds and lakesObi Lake, Usede pond, Oguta lake, Omuku pond, Ugheghe pond, Karabodone lake, Abua lake, Ikarama lake, Tenmako lake, and Adiegbe lake) in the Niger Delta area of Nigeria have been investigated experimentally by analysing the physico-chemical and biological characteristics of the surface water samples. Results show: pH (5.10 - 7.40), temperature (26.4°C - 31.0°C), turbidity (7.83 - 27.7NTU), electrical conductivity (13.5 - 34.8 μS/cm), biochemical oxygen demand (BOD) (1.07 - 19.5 mg/l), chemical oxygen demand (COD) (1.90 - 21.5 mg/l), suspended solids (SS) (9.70 - 37.3 mg/l), dissolved oxygen (DO) (2.7 - 8.7 mg/l), total dissolved solids (TDS) (33.8 - 187.0 mg/l), total phosphorus (0.73 - 2.47 mg/l), ammoniacal nitrogen (AN) (0.018 - 4.70 mg/l) and total fecal coliform count (TFCC) (nil

An Assessment of the Contribution of Municipal Solid Waste Dump Sites Fire to Atmospheric Pollution  [PDF]
Akpofure Rim-Rukeh
Open Journal of Air Pollution (OJAP) , 2014, DOI: 10.4236/ojap.2014.33006
Abstract:

Municipal solid waste open dump site operation is an important element of waste management in Nigeria, both today and in the future. Dump site fires are common occurrences in the study area. The contribution of municipal solid waste dump site fires to atmospheric pollution in the Niger Delta, Nigeria has been assessed experimentally. Five (5) municipal solid waste dump sites where fire incidence is a frequent and regular occurrence were chosen for the study. At each of the identified municipal solid waste dump site, eight (8) air quality monitoring parameters, suspended particulate matter (SPM10), nitrogen dioxide (NO2), carbon dioxide (CO2), carbon monoxide (CO), sulphur dioxide (SO2), methane (CH4), ammonia (NH3) and Hydrogen sulphide (H2S) were determined using a series of hand held air quality monitoring equipment. Results indicate the levels of SPM ranged between 773 and 801 μg/m3 and the levels of CO ranged between 133.7 and 141.6 ppm. The levels of CO

Oil Spill Management in Nigeria: SWOT Analysis of the Joint Investigation Visit (JIV) Process  [PDF]
Akpofure Rim-Rukeh
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.63026
Abstract: The Joint Investigation Visit (JIV) process of the National Oil Spill Detection and Response Agency (NOSDRA) have been analysed using the Strength, Weakness, Opportunity and Threat (SWOT) methodology. The oil spill Joint Investigation Visit (JIV) is empowered by the Oil Spill Recovery, Clean-up, Remediation and Damage Assessment Reulations, 2011 Section 5. The strength of the JIV process lies within its participatory nature and the well defined legal structure of the process. The oil spill Joint Investigation Visit process in Nigeria has several weaknesseslack of independence and oversight, lack of technical competence on the part of regulatory bodies, lack of technical competence on the part of community representative, lack of transparency on the part of oil companies, lack of general procedure for determining the actual cause of spill, lack of general procedure for determining the actual volume of oil spilled, determination on the size of the impacted area and exclusion of women from the JIV Process. The JIV process for oil spill presents a number of opportunities such as; increasing community awareness, growing consciousness through Non Governmental Organisations (NGOs) and capacity building of stakeholders. Possible threats to the JIV process include; poor governance and corruption, manipulation of the Process by the spiller through the start date of an o
Job Satisfaction among Educators in Colleges of Education in Southern Nigeria
Rim-Rukeh Akpofure,Ikhifa,O. Grace,Imide
Journal of Applied Sciences , 2006,
Abstract: This study investigated the level of job satisfaction among 230 randomly selected Colleges of Education educators. Five variables: work load, present pay, promotion, supervision and coworkers of Job Descriptive Index (JDI) were adopted for the study. The results showed that educators were most satisfied with their work load followed by coworkers, supervision and promotion. Educators expressed a high degree of dissatisfaction with their present pay. Generally, educators were not satisfied with their job. The correlation analysis showed that there was a significant negative correlation between age, education level and academic rank and the various facets that determined job satisfaction.
Corrosion of Low Carbon Steel Influenced by the Presence of Iron-oxidizing Bacteria (Leptothrix discophora)
Rim-rukeh Akpofure,Ikhifa O. Grace,E.J. Konyeme,Okokoyo A. Peter
Journal of Applied Sciences , 2006,
Abstract: Corrosion of low carbon steel influenced by the presence of Leptothrix discophora (Iron bacteria) has been studied, using the weight loss technique. At an exposure time (weeks) of 4, 6, 8, 10 and 12 the corresponding calculated corrosion rates in mpy in the presence of Leptothrix discophora were 1.36, 1.46, 1.69, 1.94 and 2.09 while the corrosion rates in the absence of the microorganism were 0.65, 0.69, 0.84, 0.91 and 0.97, respectively. Visual inspection of the coupon retrieved after 12 weeks of the test period showed the presence of mosaic deposits of rusty materials on its surface. Linearity between the log of weight-loss and period of exposure showed that the reaction was a first order reaction. The adsorption of rusty materials on the surface of the coupons in batch reactor 1 was due to physiosorption (physical adsorption).
Some physico-chemical and biological characteristics of soil and water samples of part of the Niger Delta area, Nigeria
YT Puyate, A Rim-Rukeh
Journal of Applied Sciences and Environmental Management , 2008,
Abstract: Environmental conditions that influence biocorrosion in the Niger Delta area of Nigeria are investigated experimentally by analysing the physico-chemical and biological characteristics of four (4) soil samples and water samples taken from ten (10) selected river bodies in the region. Measured properties of the water samples and the corresponding results are pH (4.5 to 6.5), temperature (26.9 to 28.7 0C), electrical conductivity (18.9 to 156.4us/cm), turbidity (19 to 48NTU), redox potential (-372 to +202mV), TDS (78 to 8450mg/l), TOC (17.3 to 38.7mg/l), nitrate ions (6.1 to 17.0mg/l), sulphate ions (0.8 to 13.6mg/l), DO (4.1 to 5.7mg/l), and microbial population (105 to 106 cfu/ml), while those of the soil samples are water content (37 to 51%), organic matter (9.4 to 18.9% dry weight), nitrate ions (0.71 to 1.82 mg/l), sulphate ions (2.1 to 5.8 mg/l) and microbial population (104 to 106 cfu/g). It shown through comparison of experimental results with literature that the levels of the measured properties for both water and soil correspond to an environment that promotes biocorrosion
Variability with depth of some physico-chemical and biological parameters of Atlantic Ocean water in part of the coastal area of Nigeria
YT Puyate, A Rim-Rukeh
Journal of Applied Sciences and Environmental Management , 2008,
Abstract: Results of in-situ measurements of some physico-chemical and biological parameters (temperature, electrical conductivity, density, dissolved oxygen, turbidity, pH, and salinity) of Atlantic Ocean water at various depths are presented. It is shown that temperature and dissolved oxygen vary significantly with depth, while variations of the other parameters with depth are minimal. Temperature, dissolved oxygen, electrical conductivity, density, pH, and salinity vary in the ranges: 3.60C–28.320C, 1.8mg/l–8.4mg/l, 3 . 29 ì s/cm – 4 .71 ì s/cm, 1017 .34 kg//m 3 –1036 .61 kg//m 3 , 7.1–8.4, and 34.52ppt –35.8ppt respectively. Turbidity is less than 1.0NTU, indicating that the water is clear and transparent.
2D Model for Diffusion of Oxygen with Biochemical Reaction During Biofilm Formation Process in Static Aqueous Medium
Y. T. Puyate,A. Rim-Rukeh
Journal of Applied Sciences , 2008,
Abstract: A 2D model that describes diffusion of oxygen with biochemical reaction during biofilm formation process in static aqueous medium is presented. The analysis is based on X60 steel placed at the bottom of a container containing produced water inoculated with Leptothrix discophora (iron-oxidizing bacteria). These bacteria form biofilms on the exposed surfaces of the metal. The biofilm-microorganisms absorb oxygen from the produced water through biochemical reaction, resulting in transfer of oxygen from the bulk liquid phase to the biofilm. Predictions of the model are compared with experimental data and good agreement is obtained.
Biocidal Efficacy of Dissolved Ozone, Formaldehyde and Sodium Hypochlorite Against Total Planktonic Microorganisms in Produced Water
Y.T. Puyate,A. Rim-Rukeh
Journal of Applied Sciences , 2008,
Abstract: The performance of three biocides (dissolved ozone, formaldehyde and sodium hypochlorite) in eliminating the bacteria and fungi in produced water is investigated experimentally. The analysis involves monitoring the microbial population in nine conical flasks each containing the same volume of a mixture of produced water, culture medium that sustains the growth of microorganisms and a known concentration of biocide. The concentrations of each biocide used in the study are 0.1, 0.2 and 0.5 ppm. It is shown that dissolved ozone exhibits the best biocidal characteristics and a concentration of 0.5 ppm eliminated all the microorganisms in the produced water after 150 min contact time.
Determination of Aquifer Properties and Groundwater Vulnerability Mapping Using Geoelectric Method in Yenagoa City and Its Environs in Bayelsa State, South South Nigeria  [PDF]
Kenneth S. Okiongbo, Edirin Akpofure
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.46040
Abstract: Nineteen Schlumberger vertical electrical soundings (VES) were carried out within and around Yenagoa city, South South Nigeria, using a maximum current electrode separation ranging between 300 - 400 m. The objectives of the study were 1) to evaluate the possibility of mapping Quaternary sediments to infer the geological structure from the electrical interpretation and identify formations that may hold fresh water with low concentration of conducting minerals such as iron 2) to evaluate the vulnerability of the aquifer in the study area. The interpretation of the data collected was by computer assisted iterative interpretation using 1-D inversion technique software (1X1D, Interpex, USA). The results of the interpretation revealed four distinct geoelectric layers. Sounding curve types obtained in the area are mostly of the form ρ1 > ρ2 < ρ3 < ρ4 (where ρ is the density) but fresh water lenses with low concentration of conducting minerals such as iron were obtained only in locations that exhibit ρ1 > ρ2 < ρ3 < ρ4 curve types. Depth to the aquifer ranges from 4.5 m in the vicinity of VES 05 to 27.0 m at the vicinity of VES 14. The resistivity of the aquiferous horizon varies between 60 - 2868 Ωm. High transverse resistance values obtained were associated with zones of high transmissivity which agrees with the geology of the Benin Formation (Coastal Plain sands) consisting of fine-medium-coarse sands. The aquifer vulnerability map illustrates the impermeability of the overburden clay layer. Values of >0.5 mhos indicate good protective capacity, while values <0.3 mhos indicate vulnerable zones with probable risk of contamination.
Page 1 /360
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.