scholarly journals Исследование концентрации радионуклидов в колодцах, используемых в качестве питьевой воды в северной Нигерии. На примере мегаполиса Джос

2021 ◽  
pp. 210-223
Author(s):  
I. Godwin ◽  
I.A. Mohammed ◽  
I.M. Awwal
Keyword(s):  
Water Samples ◽  
Average Concentration ◽  
World Health ◽  
Nuclear Radiation ◽  
Gamma Ray Spectrometry ◽  
Well Water ◽  
Radiological Protection ◽  
Radiochemical Analysis ◽  
The Mean ◽  
Mean Concentration

The increasing health effects of nuclear radiation occasioned by the enhanced human activities in the environment necessitated the need for constant investigation and assessment of radiological impact on the general populace within a confined area. Based on this, Twenty two (22) (Hand dug and motorized) well water samples were collected from various locations distributed across Jos Metropolis, Jos North LGA, Plateau State, Nigeria and analyzed for the concentration activity of these radionuclides (40K, 210Pb, 224Ra, 232Th, 238U) using radiochemical analysis technique, a high resolution gamma ray Spectrometry and a radon emanometry technique. The estimated mean concentration activity of 40K, 210Pb, 224Ra, 232Th and 238U in well water samples use as drinking water were determined. The mean concentration ranges from 1.36±0.51 Bq/l to 5.75±1.30 Bq/l. The mean concentration of 40K in well water samples ranges from 3.80±1.19 Bq/l to 2.05±0.30 Bq/l. The mean concentration of dissolved 224Ra in well water samples collected varies from 5.75±1.30 Bq/l to 1.95±0.58 Bq/l. 210Pb has an average concentration of 2.68 ± 0.80 Bq/l to 1.97±0.87 Bq/l. 232Th and 238U had average concentrations of 3.09 ± 0.57 Bq/l to 1.89±0.24 Bq/l and 5.41 ± 1.37 Bq/l to 1.36±0.51 Bq/l respectively. 210Pb and 224Ra were slightly above the recommended limits of 0.10 Bq/l and 1.00 Bq/l respectively, this can be attributed to the geological formation of the sampled area. 232Th and 238U where within the accepted standard limits of 1.00 Bq/l and 10.00 Bq/l recommended value by WHO (World Health Organization) and ICRP (International commission on radiological protection). Activity concentrations of measured radionuclides are in general decreasing in this order: 238U > 40K > 224Ra > 232Th > 210Pb for well water samples within Jos North LGA, respectively. Растущее воздействие ядерной радиации на здоровье, вызванное усилением деятельности человека в окружающей среде, обусловило необходимость постоянного исследования и оценки радиологического воздействия на население в пределах ограниченной территории. Было отобрано двадцать два образца колодезной воды из различных мест, распределенных по мегаполису Джос, Нигерия, и проанализированы на активность радионуклидов (40K, 210Pb, 224Ra, 232Th, 238U) с использованием метода радиохимического анализа, гамма-спектрометрии высокого разрешения и метода радоновой эманометрии. Определены средние концентрации радионуклидов в образцах воды из скважин, используемых в качестве питьевой воды. Средняя концентрация 40K колеблется от 3,80±1,19 Бк/л до 2,05±0,30 Бк/л. Средняя концентрация 224Ra варьируется от 5,75±1,30 Бк/л до 1,95±0,58 Бк/л. 210Pb от 2,68±0,80 Бк/л до 1,97±0,87 Бк/л. 232Th и 238U имели средние концентрации от 3,09±0,57 Бк/л до 1,89±0,24 Бк/л и от 5,41±1,37 Бк/л до 1,36±0,51 Бк/л. 210Pb и 224Ra были немного выше рекомендуемых пределов 0,10 Бк/л и 1,00 Бк/л, это может быть связано с геологическим строением отобранной области. 232Th и 238U находились в пределах принятых стандартных пределов 1,00 Бк/л и 10,00 Бк/л, рекомендованных ВОЗ и МКРЗ.

scholarly journals Organoleptic and palatability properties of drinking water sources and its health implications in Ethiopia: a retrospective study during 2010-2016

2018 ◽  
Vol 5 (4) ◽  
pp. 221-229
Author(s):  
Sisay Derso Mengesha ◽  
Abel Weldetinsae ◽  
Kirubel Tesfaye ◽  
Girum Taye
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Retrospective Study ◽  
Water Samples ◽  
Water Sources ◽  
Spring Water ◽  
Well Water ◽  
Drinking Water Sources ◽  
The Mean ◽  
Mean Concentration

Background: This retrospective study aimed to investigate the physicochemical properties of drinking water sources in Ethiopia and compare the water quality with the health-based target. For this purpose, the water quality database of Ethiopian Public Health Institute (EPHI) from 2010 to 2016 was used. Methods: The concentration and other properties of the water samples were analyzed according to the Standard Methods of Water and Wastewater analysis. Quality control and quality assurance were applied in all stages following our laboratory standard operation procedures (SOPs). Results: The concentration of the selected parameters varied based on the type of water sources. The mean concentration of turbidity was higher in spring water (21.3 NTU) compared to tap (12.6 NTU) and well (3.9 NTU) water sources. The mean concentration of total dissolved solids (TDS), electrical conductivity (EC), sodium (Na+), and sulfate (SO4 -2) was found to be higher in spring water sources than tap and well water sources. Comparably, the concentration of hardness, calcium, and magnesium was found to be higher in well water sources than spring and tap water sources. The bivariate analysis indicated that out of 845 analyzed water samples, more than 50% of the samples from Oromia region had turbidity, pH, TDS, hardness, Ca++, K+, and Na+ within an acceptable limit. In addition, the logistic regression analysis showed that water quality parameters were strongly associated with the type of water sources and regional administration at P<0.05. Conclusion: More than 80% of the samples analyzed from drinking water sources were in agreement with WHO guidelines and national standards. However, the remaining 20% specifically, pH (25%), calcium (20%), hardness (18.1%), TDS (15.5%), and turbidity (13.3%) analyzed from improved water sources did not comply with these recommendations. Due to objectionable or unpleasant taste, people may force to look for alternative unprotected water sources that lead to health concerns.

scholarly journals Assessment of the Level of Some Selected Heavy Metals and Physicochemical in Abzana Water Samples, Kibet Woreda, Ethiopia

2021 ◽  
Author(s):  
Tolesa Tesfaye ◽  
Haregot Tesfau ◽  
Adigi Balcha ◽  
Muktar Hassen
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Water Samples ◽  
Health Effect ◽  
Electrical Conductance ◽  
World Health ◽  
Sampling Station ◽  
Guideline Values ◽  
The Mean ◽  
Mean Concentration

Abstract Background: This study was conducted to investigate the contamination level of Abzana water in Asano district. A total of five water samples were collected from different point of Abzana water. Some parameters of water were analyzed like temperature, pH, electrical conductance and total dissolved solids (TDS) and four heavy metal (Cd, Pb, Cr, and Mn) concentration using standard procedures and the results were compared with WHO guideline values. Result: The results of the present study have shown the temperatures of all sampling station range between 18.9 and 19.2°c. The pH was found to be of range from 6.54 to 7.11 whereas, the electrical conductance was 174.5 to 206(µS/cm). In addition, the lowest value of TDS was 131.4 and the highest was 140.1 ppm. In contrast, heavy metals (Pb, Cd, Cr and Mn) were analyzed and compared with standards of drinking water. The results indicate that the mean concentration of Cd (0.00664mg/l) exceeded the standards, although the mean concentration of Mn, Pb and Cr were found within the standard limit at 0.076082, 0.00810 and 0.035442 mg/l respectively. Conclusion: The concentrations of the investigated metal (Cr, Pb and Mn) and all physico-chemical result of Abzana water from Asano kebele were found below the guidelines for drinking water given by the World Health Organization. But the concentration of Cd in Abzana water sample was found above the permissible limit of WHO standards. Therefore, it was not safe for drinking and health effect according metals what we have studied here.

scholarly journals Assessment of heavy metals contamination and associated risks in shallow groundwater sources from three different residential areas within Ibadan metropolis, southwest Nigeria

2021 ◽  
Vol 11 (5) ◽  
Author(s):  
Saheed Adekunle Ganiyu ◽  
Abimbola Temitope Oyadeyi ◽  
Azeem Adedeji Adeyemi
Keyword(s):  
Heavy Metals ◽  
Cancer Risk ◽  
Urban Area ◽  
Ecological Risk ◽  
Water Samples ◽  
Risk Index ◽  
Shallow Groundwater ◽  
World Health ◽  
Southwest Nigeria ◽  
The Mean

AbstractThis study has been conducted to appraise the concentrations of selected heavy metals and total dissolved solids (TDSs) in the drinking water from shallow wells in parts of Ibadan metropolis, southwest Nigeria. Fifteen (15) water samples were collected from three representative residential locations [traditional core area (TCA), peri-urban area (PUA), and urban area (UA)] for geochemical analysis. Heavy metals and TDS were analyzed with the aid of atomic absorption spectrophotometer and calibrated meter, respectively. The mean concentration (mg/L) of Zn, Pb Mn, Fe, and Cd has been 3.930, 0.658, 0.0304, 1.698, and 0.501, respectively, and as a consequence, the order of abundance of studied metals was Zn > Fe > Pb > Cd > Mn. Concentrations of Zn, Fe, Pb, and Cd were higher than recommended standards in 60%, 86.7%, 100%, and 100% of groundwater samples, respectively. However, at all points tested, the mean concentrations of Mn and TDS in water samples lie within the safe limits set by World Health Organization. The evaluation of geoaccumulation index (Igeo), enrichment factor (EF), and contamination factor suggests that representative water samples were low-to-moderate contamination. The potential ecological risk index advocates low-to-moderate ecological risk in TCA and PUA, while it demonstrated exclusive “moderate” risk in UA. Further, the range of pollution load index (PLI) (0.55–1.32) in both TCA and PUA shows nil-to-moderate pollution status, while PLI values > 1 in UA indicate moderate contaminated state. The degree of contamination in groundwater showed the following trends: UA > TCA > PUA in the study area. Moreover, the results of EF and quantification of contamination of analyzed metals in water samples indicate geogenic and anthropogenic inputs. The contribution of studied metals to the incidence of non-cancer risk via oral intake within the residential sites follows the order: cadmium > lead > zinc > iron > manganese. The hazard index as a result of ingested heavy metals for the three population classes surpasses the acceptable range in the order of infant < child < adult. Cadmium and lead made considerable impact to the estimation of cancer risk in the study area for the three human population categories. Factor analysis extracted only one component that explained 94.64% of the entire variance, while cluster analysis identified three distinct groups based on similar water quality characteristics. Based on the findings of the study, awareness programs toward protecting the shallow groundwater sources should be launched, encouraged, and sustained. Moreover, the study suggests better hygienic practices and pre-treatment of contaminated water before consumption.

ACTIVITY CONCENTRATIONS OF NATURALLY OCCURRING RADIONUCLIDES IN SOME COMMERCIAL BOTTLED WATERS FROM PARTS OF SOUTHWESTERN NIGERIA

2017 ◽  
Vol 15 (1) ◽  
pp. 82-93
Author(s):  
O O ALATISE ◽  
Y S AKINSANYA
Keyword(s):  
Water Samples ◽  
Age Groups ◽  
Germanium Detector ◽  
Bottled Water ◽  
World Health ◽  
Radiological Protection ◽  
Southwestern Nigeria ◽  
Activity Concentrations ◽  
Effective Doses ◽  
Recommended Level

In this work, the presence of natural radioactivity in bottled waters from parts of south-west Nigeria was investigated. The activity concentrations of 226Ra, 232Th and 40K in the water samples were ob-tained using a high-purity germanium detector. The ranges of activity concentrations obtained for 232Th, 226Ra and 40K were 0.15 to 1.25Bq l-1, 0.02 to 2.94Bq l-1 and 6.96 to 46.47 Bq l-1, respectively. 40K has the highest activity concentration in the bottled water samples while 232Th has the least value. The activity concentrations obtained together with ingested dose conversion factors, were used to calculate the annual effective doses for six age groups ranging from < 1 to >17 years. The calculated total annual effective doses (mSvy-1) ranged from 0.01 to 4.16 and the values are age dependent (highest for < 1year and lowest for 7-12years age groups). The results showed that the average annu-al effective dose for 35% of the bottled water brands were below the World Health Organization (WHO) recommended level of 0.1 mSvy-1 for drinking water. Furthermore, out of the remaining 65% that were higher than the WHO recommended level, 9% were higher than 1 mSvy-1, which is the radia-tion exposure limit for the general public according to the recommendation of the International Com-mission on Radiological Protection. Consequently, consumption of some of the bottled water brands investigated in this study could constitute radiological hazard especially for the < 1 and 12-17years age groups.

scholarly journals Heavy Metals in Water and Sediment: A Case Study of Tembi River

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Saeed Shanbehzadeh ◽  
Marzieh Vahid Dastjerdi ◽  
Akbar Hassanzadeh ◽  
Toba Kiyanizadeh
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Average Concentration ◽  
Agricultural Water ◽  
Water And Sediment ◽  
The Mean ◽  
Mean Concentration ◽  
Cu And Zn ◽  
Standard Range

This study was carried out to examine heavy metals concentration in water and sediment of upstream and downstream of the entry of the sewage to the Tembi River, Iran. Samples were collected from upstream and downstream and were analyzed for Cd, Cr, Cu, Fe, Pb, Ni, and Zn by atomic absorption spectrophotometer. The results indicated that the average concentration of the metals in water and sediment on downstream was more than that of upstream. The comparison of the mean concentrations of heavy metals in water of the Tembi River with drinking water standards and those in the water used for agriculture suggests that the mean concentration of Cu and Zn lies within the standard range for drinking water and the mean concentration of Mn, Zn, and Pb lies within the standard range of agricultural water. The highest average concentration on downstream for Pb in water and for Mn in sediment was 1.95 and 820.5 ppm, respectively. Also, the lowest average concentration on upstream was identified for Cd in water and sediment 0.07 and 10 ppm, respectively. With regard to the results, it gets clear that using the water for recreational purposes, washing, and fishing is detrimental to human health and the environment.

Assessment of Polycyclic Aromatic Hydrocarbons in Underground Water around the Viccinity of Balogun-Biiro Dump Site, Oke Bale, Osogbo, Nigeria

2013 ◽  
Vol 2 (1) ◽  
Author(s):  
T A Adedosu
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Water Samples ◽  
Underground Water ◽  
Dump Site ◽  
Diagnostic Indices ◽  
Polycyclic Aromatic ◽  
The Mean ◽  
Mean Concentration ◽  
Significant Concentration

Well-water samples were collected from the vicinity of Balogun–biiro dump site located in Okebaale Osogbo, Osun state, Nigeria. The polycyclic aromatic hydrocarbons were determined qualitatively and quantitatively using GC-FID. The concentration of polycyclic aromatic hydrocarbons in the water samples ranged from 0.01235 µg/kg to 0.05365 µg/kg with mean concentration ranging from 0.00094 µg/kg to 0.00335 µg/kg respectively. The highest concentration of ∑16 𝑃𝐴𝐻𝑠was recorded in S6 and it was observed that there is decline in polycyclic aromatic hydrocarbons concentrations from point of water pollution. There was a significant concentration of both the lower and higher rings polycyclic aromatic hydrocarbons in the samples. These distributions as well as various polycyclic aromatic hydrocarbons diagnostic indices calculated showed that the sources of polycyclic aromatic hydrocarbons in the samples were both petrogenic and pyrogenic. The mean concentrations of polycyclic aromatic hydrocarbons recorded in the water samples showed a little bit enhanced values than the recommended tolerable limits, which indicated some level of pollution in the water samples

scholarly journals Nutrient output from rural areas on the example of two catchments Skuterud and Zagożdżonka

2011 ◽  
Vol 43 (1) ◽  
pp. 71-85 ◽  
Author(s):  
Karolina Sawa ◽  
Leszek Hejduk ◽  
Johannes Deelstra ◽  
Lillian Øygarden
Keyword(s):  
Rural Areas ◽  
Management Practices ◽  
Monitoring Program ◽  
Average Concentration ◽  
General Description ◽  
Nutrient Runoff ◽  
Nitrogen Concentrations ◽  
The Mean ◽  
Summer Time ◽  
Mean Concentration

Nutrient output from rural areas on the example of two catchments Skuterud and Zagożdżonka In this paper, two rural catchment - the Zagożdżonka catchment in Poland and the Skuterud catchment in Aas, Akershus county in Norway are compared. In addition to the general description, more in particular information, runoff, N-NO3 load, P-PO4 load, total phosphorus and total nitrogen concentrations in streams are compared. The data compared are from 1993 to 1995 in Zagożdżonka catchment and from 1994-1996 from Skuterud catchment. The average concentration of N-NO3 in Zagożdżonka River in the period was 0.85 mg·l-1 and the mean concentration of P-PO4 was 0.13 mg·l-1. In the stream in Skuterud catchment the average concentration of N-NO3 was 4.95 mg·l-1 and the mean concentration of P-PO4 was 0.04 mg·l-1. For both catchments the same data were also compared for the 2008. In Skuterud catchment the highest concentration of nutrients occurred in November, March and April, which was connected to the higher runoff from agricultural areas during the snowmelt period. In Zagożdżonka catchment the highest concentration of nutrients was noted in March, April and in summer time, which was connected to periods with high amounts of precipitation. Comparison of the two rural catchments showed many differences in applied measurement methods for water sampling, water measurement, discharge measurement, runoff amounts and management practices, which had an effect on results of monitoring program. The compared data can be useful to predict the development of future environmental conditions for example water quality. It can also be useful for predict how nutrient runoff will be in future. What is more the different conditions for runoff in Skuterud and Zagożdżonka then different measures are needed.

ELEMENTAL ANALYSIS OF RAINWATER BY PIXE TECHNIQUE

2012 ◽  
Vol 22 (03n04) ◽  
pp. 299-306
Author(s):  
M. B. H. AL-BEDRI ◽  
I. J. ABDUL GHANI
Keyword(s):  
Reference Materials ◽  
Certified Reference Materials ◽  
World Health ◽  
Published Data ◽  
Concentration Technique ◽  
The Mean ◽  
European Standards ◽  
Health Organization ◽  
Trace And Toxic Metals ◽  
Mean Concentration

Analysis of trace and toxic metals in untreated rainwater has been carried out using nondestructive proton induced X-ray emission (PIXE) in combination with pre-concentration technique. The pre-concentration technique used for this purpose was carried out by evaporation of the rainwater samples at 50°C under atmospheric pressure. Untreated rainwater samples were collected from 10 different locations across Baghdad city, Iraq. The mean concentration values of the elements ( Al, Ca, Co, Ti, V, Cr, Mn, Fe, Zn, Br, Rb and Sr ) in rainwater samples were determined simultaneously at the parts per billion (ppb) levels. The rainwater samples and certified reference materials (CRMs) were irradiated with 2.0 MeV proton beam from Van de Graaff accelerator. The accuracy of the results was proved by using certified reference materials (GSP-2). The results were compared with the published data, Iraqi standards (IRQ), European standards (EU), and World Health Organization (WHO) guidelines for drinking water quality. The purpose of this work was to obtain the total elemental compositions of rainwater in Iraq.

scholarly journals Effect of COVID-19 Lockdown on Metal Concentration in the Water Column of Asia’s Largest Coastal Lagoon

2021 ◽  
Author(s):  
Syed Hilal Farooq ◽  
Amrit Kumar Mishra ◽  
Sandip Kumar Muhakud ◽  
Prasannajit Acharya ◽  
Pradipta Ranjan Muduli ◽  
...  
Keyword(s):  
Metal Concentration ◽  
Water Samples ◽  
Monsoon Season ◽  
Physical Parameters ◽  
Chilika Lagoon ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
The Mean ◽  
The Impact ◽  
Mean Concentration

A complete halt on all anthropogenic activities and human movement due to COVID-19 lockdown has provided a great opportunity to assess the impact of human activities on coastal marine ecosystems. The current study assessed the concentration of the metals in water samples of the largest brackish water lagoon of Asia; the Chilika lagoon in the state of Odisha, India between pre-COVID-19 and post-COVID-19 lockdown scenarios. Monthly water samples (n=30 stations) from 0.3 m depth were collected from three sectors of the lagoon seasonally; pre-monsoon, monsoon, and post-monsoon. In addition to various physical parameters [pH, salinity, alkalinity, (DO) dissolved oxygen, (TDS) total dissolved solids, and (EC) electrical conductivity] the collected water samples were analysed for 18 trace metals (Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Sr, Th, Tl, U, V). Most of the physical parameters showed a significant variation between pre-and post-COVID-19 scenarios, except for pH and DO. The concentration of five metals (Be, Cd, Co, Ni, and Pb) remained below detection limits in all water samples. The impact of COVID-19 lockdown on the concentration of the metal in the water samples was noticed along with the three sectors of the lagoon. However, eight metals (Al, As, Cr, Fe, Mn, Th, U, and V) were significantly different between the COVID-19 scenarios and the remaining five metals were not statistically significant. The mean concentration of Al, As, Fe, Th, and V were higher in the pre-COVID-19 scenarios, whereas only Cr and Mn were higher in the post-COVID-19 scenarios. The mean concentration of U was similar among both COVID-19 scenarios, even though there were seasonal and sectoral differences. The seasonal influence of riverine influx was more evident on metal concentration during the monsoon season, whereas the difference between sectors was more prominent during the post-monsoon season. An increased number of correlations between physical parameters and metal concentration were observed in the post-monsoon season and post-COVID-19 scenario. This study provides evidence that the imposition of COVID-19 lockdown reduced metal influx in the water column and improved the water quality of the Chilika lagoon. Our results can be used as baseline for metal concentration in surface waters of the lagoon.

scholarly journals Assessment of Air Pollution by PM10 and PM2.5 in Nawabshah City, Sindh, Pakistan

2019 ◽  
Vol 9 (1) ◽  
pp. 3757-3761
Author(s):  
A. A. Siyal ◽  
S. R. Samo ◽  
Z. A. Siyal ◽  
K. C. Mukwana ◽  
S. A. Jiskani ◽  
...  
Keyword(s):  
Construction And Demolition Waste ◽  
Environmental Research ◽  
World Health ◽  
Dust Particles ◽  
Traffic Density ◽  
Demolition Waste ◽  
Pm10 And Pm2.5 ◽  
The Mean ◽  
The City ◽  
Mean Concentration

Increased traffic density due to urbanization is a major cause of air quality deterioration. Atmospheric particulate matter (PM) constitutes one of the most challenging issues in environmental research. This study was designed to assess PM10 and PM2.5 pollution at ten main locations in Nawabshah. Analysis of PM10 and PM2.5 pollution was carried randomly at different selected locations of the city. The highest concentration of PM10 was found at Mohini bazar (MB) and the highest concentration for PM2.5 was found at New Naka (NN). The mean concentration of PM10 was 78.3% higher than world health organization (WHO) standards and 35% than Pakistan’s National Environmental Quality Standards (NEQS). The mean concentration of PM2.5 was 47.3% and 26.3% higher respectively. Mean concentrations of PM2.5 on day-2 and day-10 were found lower than those set by NEQS, while mean concentrations of PM10 on all days exceeded the WHO and NEQS standards indicating that the city was heavily polluted more with PM10 than with PM2.5. Re-suspension of dust particles due to traffic flow, open burning of unmanaged solid waste on the sides of the road and in the street, and improper handling of construction and demolition waste were identified as the main sources for PM pollution in the city. Exposure to higher levels of PM10 and PM2.5 can cause health problems. High levels of PM10 and PM2.5 are a call for the implementation of strict measures to control PM pollution at Nawabshah in order to protect public health and the environment.

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