scholarly journals Total petroleum and aliphatic hydrocarbons profile of the River Niger surface water at Okpu and Iyiowa-Odekpe regions in South-Eastern, Nigeria

2021 ◽  
Author(s):  
CI Chemistry International
Keyword(s):  
Molecular Weight ◽  
Surface Water ◽  
Mean Value ◽  
Total Petroleum Hydrocarbons ◽  
The European Union ◽  
South Eastern ◽  
Flame Ionization ◽  
Anthropogenic Inputs ◽  
Standard Limit ◽  
River Niger

Total petroleum hydrocarbons (TPH) as well as the aliphatic profiles of surface water at the Okpu and Iyiowa-Odekpe sections of the River Niger in South-Eastern Nigeria were determined. Composites samples taken from surface water at three different locations (ST-1, ST-2, & ST-3) for the months of June, September, December and February, were extracted with dichloromethane (DCM) by liquid-liquid partition and analyzed for TPH and aliphatic components using gas chromatography-flame ionization detection (GC-FID). The results reveal a TPH range of 1658.475-5435.742 μg/L with a mean of 2596.523±492.466 μg/L. The mean value for the raining season (3283.783±1253.99 μg/L) was significantly higher than that of the dry season (1909.429±190.866 μg/L). Values for all the months at all sampled locations were also much higher than the European Union (EU) standard limit of 300 μg/L. Aliphatic hydrocarbon source diagnostics ratios gave range of: even to odd numbered n-alkanes ratio (0.162–2.371), carbon preference index -CPI (0.702–1.581), sum of low molecular weight to high molecular weight n-alkanes (0.0275–1.152), nC31/nC19 (0.00–49.72), sum of long chain hydrocarbons to short chain hydrocarbons (0.824–38.03), and pristane/phytane ratio (ND–0.26); indicating that the TPH in the water were from both biogenic and anthropogenic inputs with biogenic sources that are largely terrestrial. This calls for necessary actions to reduce the anthropogenic inputs of TPH in the water so as to protect the aquatic ecosystem and sustain public health.

scholarly journals Total Petroleum Hydrocarbons Contamination of the Surface Water and Sediments of Orashi River, Engenni, Ahoada West, Rivers State, Nigeria

2021 ◽  
Vol 8 (1) ◽  
pp. 68-76
Author(s):  
Edori E S ◽  
Edori O S ◽  
Bekee D
Keyword(s):  
Surface Water ◽  
Petroleum Hydrocarbons ◽  
Mean Value ◽  
Present Condition ◽  
Total Petroleum Hydrocarbons ◽  
Allowable Limit ◽  
Sediment Samples ◽  
Flame Ionization ◽  
Rivers State

The level of contamination of Orashi River by total petroleum hydrocarbons were investigated through the collection of surface water samples and sediment samples from four locations along the river. Determination of the level of contamination was done with the use of gas chromatography-flame ionization detector after following laid down clean-up procedures. The results obtained showed that total petroleum hydrocarbons in the surface water were 10.913±2.2022mg/L, 7.645±2.683mg/L, 9.074±2.1654mg/L and 12.212±3.3034mg/L for stations 1, 2, 3 and 4 respectively with a mean value of 9.961±2.5885mg/L, while in the sediment samples concentration values recorded were 22.3925±5.2104mg/Kg, 35.1071±9.9652mg/Kg, 50.4431±15.9916mg/Kg and 29.3869±8.0410mg/Kg for stations 1, 2 3 and 4 respectively with a mean value of 34.3324±9.8021mg/Kg. The partition coefficient calculations revealed that the sediment phase is more stable for total petroleum hydrocarbons as compared to the water phase. The analysis of the randomly collected samples revealed that total petroleum hydrocarbons have contaminated the river and therefore adequate steps should be taken to remedy the present condition of the Orashi River in order to mitigate any probable rise in the quantity of total petroleum hydrocarbons in the river above allowable limit.

scholarly journals Dietary acrylamide intake by potato crisps consumers: A case of Nairobi County

2020 ◽  
Vol 5 (1) ◽  
pp. 871-878
Author(s):  
George Ooko Abong ◽  
Jackline Akinyi Ogolla ◽  
Michael Wandayi Okoth ◽  
Bruno De Meulenaer ◽  
Jackson Ntongai Kabira ◽  
...  
Keyword(s):  
Probabilistic Approach ◽  
Mean Value ◽  
Mitigation Measures ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Potato Crisps ◽  
Flame Ionization ◽  
Consumption Data ◽  
Dietary Acrylamide ◽  
The Mean

AbstractThe levels of acrylamide intake because of potato crisps consumption remains unknown in Kenyan context. This study assessed the exposure to acrylamide because of consumption of potato crisps in Nairobi, Kenya. A cross-sectional survey was carried out among 315 crisps consumers in Nairobi, and consumption patterns were collected using a pre-tested structured 7-day recall questionnaire. A total of 43 branded and 15 unbranded potato crisps samples were purchased in triplicates of 100 g and acrylamide was quantified using a gas chromatograph with a flame ionization detector. Consumption data were combined with the data on acrylamide contents from which dietary acrylamide intake was calculated using a probabilistic approach based on @Risk TopRank 6 risk analysis software for excel. The mean estimated acrylamide intake was 1.57 µg/kg body weight (BW) per day while the 95th (P95) percentile was 5.1 µg/kg BW per day, with margins of exposures (MOE) being 197 and 61, respectively. The intake of acrylamide was significantly (P < 0.05) higher in unbranded crisps with a mean value of 2.26 and 95th percentile of 6.54 µg/kg BW per day, MOE being 137 and 47, respectively. There were extremely lower MOE indicating higher exposure to acrylamide by the consumers mainly because of the higher acrylamide contents in potato crisps, and hence the need for mitigation measures.

STUDYING THE HISTORY OF THE BALKANS / SOUTH-EASTERN EUROPE: RESEARCH TASKS AND PROBLEM FORMULATION

2021 ◽  
pp. 7-21
Author(s):  
Sergei Romanenko ◽  
Keyword(s):  
Eastern Europe ◽  
Problem Formulation ◽  
The European Union ◽  
Western Balkans ◽  
Interstate Relations ◽  
The Balkans ◽  
South Eastern ◽  
European Culture ◽  
South Eastern Europe ◽  
The Relationship

The new issue of the journal «Current Problems of Europe» opens with the problem-oriented article, dedicated to the analysis of the state of the Balkans / South-Eastern Europe region and its development in 2000-2020. The author gives a systemic description of the processes taking place in the intra-national and international intra-regional political, social and economic development of the countries of the region, and the problems generated by them. The changes are associated with a difficult transition phase, experienced by the states of the region, for the most part belonging to the post-socialist world (Bulgaria, Romania, Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, North Macedonia, Kosovo and Albania). The exceptions are Greece, Turkey and Cyprus, however, these three states are also going through a difficult period in their history, associated with new problems both in interstate relations within this triangle, and in relations with NATO and the EU, as well as with Russia. The article discusses the specifics of translating the terms «people» and «national» into Russian, as well as the toponym Kosovo (Serb.) / Kosova (Alb.), and ethnonyms «Bošnjak» and «bosanac». The first part of the issue contains articles devoted to general problems of regional studies: the relationship between the terms Eastern Europe, Central Europe, South-Eastern Europe, Balkans, Western Balkans; comparative and political science subjects; the role of the European Union and China in the development of the region; the relationship of national Serbian, post-Yugoslavian and European culture and intellectual heritage as well. The second part of the issue examines the relations of the Balkan states with the states of Central and Eastern Europe (Czech Republic, Romania, Belarus), as well as the specifics of their development in the post-socialist period. Thus, there is the possibility of a multilateral - historical, political and cultural, as well as comparative analysis of the development of this complex region, which is of great importance for international relations worldwide.

Total Petroleum Hydrocarbons Categories Concentration in Soils Within the Vicinity Housing Heavy-Duty Diesel Generators in Three Universities in Port Harcourt South-South Nigeria

2021 ◽  
Vol 4 (1) ◽  
Keyword(s):  
Petroleum Hydrocarbons ◽  
Health Hazard ◽  
Soxhlet Extraction ◽  
Soil Samples ◽  
Total Petroleum Hydrocarbons ◽  
Heavy Duty ◽  
Flame Ionization ◽  
Port Harcourt ◽  
Diesel Generators ◽  
Heavy Duty Diesel

Total petroleum hydrocarbons pollution of soil samples randomly collected from three Nigeria Universities in Port Harcourt due to the use of heavy-duty diesel generators was studied to ascertains the level of concentration of the different hydrocarbons’ categories. The soil samples were collected at two different depths of 0.00-0.50m and 0.50-1.00m. The Universities were Ignatius Ajuru University of Education (IAUE), Rivers State University (RSU) and University of Port Harcourt (UNIPORT). The different total petroleum hydrocarbons categories were Gasoline Range Organics (GRO), Diesel Range Organics (DRO) and Lube Oil Range. Soxhlet extraction method was used in extracting the samples and due column clean-up was performed for chromatographic analysis. Gas Chromatography-Flame Ionization Detector was used to determine the level of concentrations of the different categories of total petroleum hydrocarbons. The results showed that at 0.00-0.50m depth, IAUE was 4.42145, 945.4784, and 525.66919 mg/Kg for GRO, DRO and lube oil range respectively, RSU was not detected, 494.44799 and 458.6715 mg/Kg for GRO, DRO and lube oil range respectively and UNIPORT was 4.40920, 501.2246 and 467.71426 mg/Kg for GRO, DRO and lube oil range respectively. At 0.50-1.00m depth IAUE was 2.75132, 596.35126, and 311.84451 mg/Kg for GRO, DRO and lube oil range respectively, RSU was not detected, 298.06899 and 270.61619 mg/Kg for GRO, DRO and lube oil range respectively and UNIPORT was 2.77780, 301.74701 and 276.88684 mg/Kg for GRO, DRO and lube oil range respectively. The level of soil contamination Showed that GRO > DRO > lube oil range. The observation showed that hydrocarbon pollution decreased with increase in depth. The level of DRO and lube oil range in the studied areas exceeded the limit acceptable and therefore adequate steps should be taken to remedy the situation so that it will not pose any health hazard to the workers operating the heavy-duty generators.

scholarly journals Hydrological prediction in a non-stationary world

2007 ◽  
Vol 11 (1) ◽  
pp. 408-414 ◽  
Author(s):  
R. T. Clarke
Keyword(s):  
Time Series ◽  
Urban Development ◽  
Mean Value ◽  
South American ◽  
Drainage Basins ◽  
South Eastern ◽  
Rapid Changes ◽  
Hydrological Prediction ◽  
Random Fluctuations ◽  
Linear Trends

Abstract. The paper discusses evidence that common assumptions in the analysis of hydrological time series (homogeneous variability in random fluctuations about a constant mean value) may not be appropriate for some South American drainage basins. Relatively rapid changes have occurred, and are occurring, as a consequence of replacing mature forest by short crops and urban development. Some research claims to have detected non-linear trends in streamflow in rivers draining the south-eastern part of the sub-continent, together with decadal fluctuations and interannual peaks at ENSO timescales. The paper discusses the implications of such changes for hydrological practices now in widespread and largely unquestioned use.

Wastewater effluent characteristics from Moroccan textile industry

2013 ◽  
Vol 67 (12) ◽  
pp. 2791-2799 ◽  
Author(s):  
Y. Mountassir ◽  
A. Benyaich ◽  
M. Rezrazi ◽  
P. Berçot ◽  
L. Gebrati
Keyword(s):  
Textile Industry ◽  
Chemical Characterization ◽  
Textile Wastewater ◽  
Complete Characterization ◽  
Wastewater Effluent ◽  
The European Union ◽  
Physico Chemical ◽  
Standard Limit ◽  
Effluent Characteristics

The objectives of this work were to carry out a complete characterization of textile wastewater, resulting from a textile unit located in the Marrakesh region. A physico-chemical characterization has been performed, focused on organic and toxicological aspects. The cladoceran Daphnia magna was used as the sensor organism and lethal concentration as a criterion to measure the toxicity of textile wastewater. The physico-chemical and toxicological status of a local textile effluent showed considerable values limitation, when compared to the European Union standard limit and Moroccan guide level and other studies. In view of those characteristics, the wastewater effluent from the textile industry should be considered to be treated before discharge to the environment.

scholarly journals Examination of Surface Water Along River-Rima Floodplain in Wamakko, Sokoto State, Nigeria.

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Abdulqadir Abubakar Usman ◽  
Murtala Abubakar Gada ◽  
Aminu Muhammad Bayawa ◽  
Ibrahim Mustapha Dankani ◽  
Saadu Umar Wali
Keyword(s):  
Drinking Water ◽  
Surface Water ◽  
Principal Component ◽  
Hierarchical Cluster ◽  
World Health ◽  
Coliform Bacteria ◽  
Municipal Sewage ◽  
Bacteria Growth ◽  
Anthropogenic Inputs ◽  
Health Organization

This study examined the hydrochemistry of surface water along the River-Rima floodplain area. Five sampling locations were purposively selected, and, in each point, three samples were taken from surface water (river). The sampling was repeated after 20 days. Thus, a total of 30 samples were collected. Water samples obtained were subjected to laboratory tests. Results revealed that BOD, TDS, Mg2+, and Fe3+ are above the World Health Organization (WHO) and Standard Organization of Nigeria (SON) reference guidelines for drinking water quality. Isolates detected from the coliform bacteriological analysis include Enterobacter aerogene, Escherichia coli, and Citrobacter freundii with most of the samples showing coliform bacteria growth above the SON standard for drinking water. Hence, the water in the River-Rima floodplain of the Wamakko area is of low quality and unsafe for drinking. Results of principal component analysis (PCA) revealed external influences such as pollutant wash off and rock weathering as controls on hydrochemistry of surface water. There is some indication of anthropogenic inputs (Cl-, NO3-, and PO42-) based on hierarchical cluster analysis. Elements including Cl-, NO3-, and PO42- are increasingly added into surface water from human activities, mainly agriculture, and municipal sewage.

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