- Open Access
- Authors : Ibrahim A. Sukamari , Abdulaziz Mohammed , Bitrus Kwaji
- Paper ID : IJERTV9IS120274
- Volume & Issue : Volume 09, Issue 12 (December 2020)
- Published (First Online): 16-01-2021
- ISSN (Online) : 2278-0181
- Publisher Name : IJERT
- License: This work is licensed under a Creative Commons Attribution 4.0 International License
Assessment of The Suitability of Some Groundwater Sources in Mubi for Domestic Application
Ibrahim A. Sukamari1*, Abdulaziz Mohammed2, Bitrus Kwaji2
1Depatment of Civil Engineering Technology, Federal Polytechnic Mubi, Nigeria
2Department of Geology and Mining Technology, Federal Polytechnic Mubi, Nigeria
Abstract:- This study investigated the quality of groundwater from shallow hand dug wells in Mubi. Physicochemical analysis of some important water quality parameters was done and the results obtained compared to the World Health Organisation (WHO) and Nigerian Standard for Drinking Water Quality (NSDWQ). Results obtained show that Iron failed by both standards adopted for checking the compliance while manganese failed to meet the NSDWQ standard for well 2 and well 6 (DW2 and DW6). Furthermore, results of Total Hardness for well 4 (DW4) well 6 (DW6), well 7 (DW7), well 10 (DW10) and well 11 (DW11) failed. The water quality of all locations sampled could be considered safe for domestic use with regard to their physicochemical character as determined by this study.
Key words: Hand dug well, physicochemical, compliance, water quality, groundwater
In order to guarantee public health, access to adequate water of good quality must be given to the people (Sukamari et al., 2020). However, safe water supply for domestic use in many urbanizing communities of the world is increasingly becoming an issue of great concern due to the impact of human population growth and its consequent expansion of anthropogenic influences. The human industrial, commercial and agricultural complexes, all expanding to support the rapidly increasing human population, have resulted in significant pollution burden on the available water resources. Although to a greater extent the surface water sources are more susceptible to pollution and are therefore more rapidly polluted, the rate at which the groundwater resources are polluted and contaminated by natural and anthropogenic activities in recent times is alarming (Egbueri, 2020).
Notwithstanding, groundwater is the most preferred source of water in various user sectors on account of its near universal availability, dependability and low capital cost (Sukumaran et al., 2015). It is considered the healthiest source of drinking water since it is subjected to numerous physiochemical phenomenon and reactions that have bearing on its final quality as it percolated through the soil structure. Consequently, the quality of a groundwater can be said to be a function of all the processes and reactions it went through, from the moment it condensed in the atmosphere to the time it is discharged by a well or a spring.
One principal way groundwater contamination or pollution can occur is naturally, through geological condition such as
rock-water interactions (Dugga et al., 2020; Ishaku & Abdulhakeem, 2010). Other natural factors include precipitation, the nature of groundwater flow and its direction; its time of residence, and the intra/inter-aquifer interactions. Moreover, through anthropogenic influences, leaching of pollutants originating from various activities such as industrial and domestic wastes and wastewater generation and discharge, commerce and agriculture also have capacity to degrade groundwater quality (Shukla & Saxena, 2020).
Groundwater is the most important source of water supply for domestic, commercial and agricultural activities in Mubi. For this reason, the assessment of the groundwater quality of Mubi is very important to the sustainability of its scarce water resources as well as the maintenance of the health of the environment. The quality of human life is significantly dependent on the quality of water man has access to and the health of the environment he inhabits. Poor drinking water affects the health of both man and the environment.
This study therefore set out to assess the suitability of some groundwater sources in Mubi for domestic application.
MATERIALS AND METHODS
Location of the Study Area
The study area is geographically situated on latitude 10Â°2930 to 10Â°630 and longitude 13Â°1400 to 13Â°3200, and covers a total land mass of 506.4 2 (Figure 1). The Principal economic activities in Mubi is commerce and agriculture. River Yedzaram and River Mudzira are the two significant rivers found in Mubi. River Yedzeram flows northward from its source at the Hudu Hills located south-east of Mubi, and receiving flow from river Mudzira at Digil, it drains into the Lake Chad after about 330 kilometres (Sukamari et al., 2020; Wante & Anoliefo, 2014 cited Adebayo,2004). Mubi has a climate classified as Equatorial Savannah with dry winter or tropical rainy according to Koppens code (Kottek et al., 2006).
Figure 1: Map of the study area
Geology and Hydrogeology of the Study Area
Mubi is of the Precambrian Basement Complex of the Hawal Massif in the northeastern sector of Nigerias eastern Basement Complex. It is exactly located in the parts that extend into the northern parts of Adamawa State (Figure 2) (Obiefuna, 1997). The rocks within the Hawal Basement are characterized by high grade metamorphic rocks, pervasive migmatization and extensive granite plutonism (Ferre et al, 1996). The rocks are gneiss, granite gneiss, granites and some minor rocks such as dolerite, aplite and pegmatite (Obiefuna, 1997; Adekeye, and Ntekim, 2004; Patrick, 2005; Bassey, and Valdon, 2011). Some parts of the Basement Complex in Mubi is overlain by elluvial deposits which may have been derived from the weathering of the basement complex uphill or insitu (Obiefuna, 1997). Moreover, some areas are characterised by reddish to brownish laterite overburden with characteristics thickness ranging from 5m to 25m overlying the bedrock along river Yedzaram. The predominant geological structures of the area include Older granite with dolerite and pegmatite dykes, as well as quartz feldspar veins, folds, sheer zones, etc. (Adebayo, 2004; Obiefuna, 1997).
Mubi is characterised by two aquifer systems which are both highly localised as is characteristic to groundwater occurrence in the crystalline basement area. These aquifer types are namely: the fractured basement (mainly migmatite granite) aquifer, and the unconsolidated weathered overburden aquifer. In a study by Obiefuna (1997), he found that all hand dug wells studied tap water from the unconsolidated weathered overburden. The weathered overburden are luvisols characteristically made up of low organic matter, low cation exchange capacity and low water
Figure 2: Geological setting of the study area (Modified after Maluskiet al., 1995)
Sampling and Analytical Methodology
Groundwater samples were collected from twelve (12) randomly selected hand dug wells having a range of depth between 9m to12 m in the study area. The preselected wells were sampled twice in the months of August and September. The wells were purged prior to sampling using a decontaminated bailer so that the samples collected were representatives of groundwaters at the sampling locations. Sampling followed procedure described in Triplett et al (2006).
All water samples were collected into 1-liter capacity acid- cleaned High Density Polyethylene (HDPE) bottles with strict adherence to the sampling protocols described by Standard methods (APHA et al., 2017) and were analysed independently.
Samples collected were analysed for temperature, pH, turbidity, total dissolved solids (TDS), total hardness (TH), chloride, nitrate, phosphate, sulphate, sodium, magnesium, calcium, manganese, iron.
For quality assurance purpose, allequipment were adequately calibrated according to standards before measurement, and all reagents used were of analytical grade. Samples for metal analysis were treated in the field with 3 ml concentrated HNO3 per litre in order to bring the pH to less than 2 for its preservation (Begum et al., 2014; David
K. et al., 2011). Samples for Cl- , SO 2-, NO3 -and PO 3- analyses were stored in temperature controlled environment at 4 OC for transport and analyses in the laboratory within 24 hours.
retention ability making it very unpredictable in terms of
The concentrations of major anions Cl- , SO 2-, NO
water yielding and retention capacity (Adebayo, 2004). 3- 4 3
PO4 ; TDS and TH in water samples were determined
according to standard methods (APHA et al 2017). The
elemental concentrations for Na2+, Mg2+, Ca2+, Fe and Mn in water samples were determined by an Atomic Absorption Spectrophotometer AAS (Buck Scientific, VPG 210) following procedure as reported by David K. et al., (2011).
RESULTS AND DISCUSSION
The results of the physicochemical parameters for the different dug wells sampled as analysed and statistically treated for means of concentrations and deviations from the means as well as mean of means of concentrations are presented in Tables 1-3. The World Health Organisation (WHO) guidelines (WHO, 2017) and the Nigerian Standards for Drinking Water Quality (NSDWQ) guidelines (SON, 2007) were recognized and used as the standards for comparison and checking of compliance. The compliance of the results to the standards adopted is diagrammatically summarised in Figures 2 and 3.
DISCUSSION OF RESULTS
The mean temperature values recorded for all the wells sampled fall below the standard set for maximum permissible water temperature by WHO based on palatability and aesthetic objectives (WHO, 2017). Temperature has been reported to affect the physical, chemical and biological nature of water (Kale, 2016). Significant impact on the quality of groundwater have been observed as a consequence of little increases in its temperature. Commonly affected parameters by temperature increase include magnesium, potassium, sodium, pH, dissolved organic carbon (DOC), As, B, and F (Bonte et al., 2013; Saito et al., 2017).
The temperature values obtained in this study are consistent with temperatures prevailing and obtainable in the tropical belt (Oyem et al., 2014).
From Table 1, it can be seen that the mean of all pH values reported are within limits of acceptability by both quality standards (WHO and NSDWQ). The pH of water is a measure of the concentration of hydrogen ions in the water and an indicator of its alkalinity or its acidity. The pH of water has significant impact on health and the environment as it helps to inhibit or drive many chemical interactions. For example, a pH of less than 6.5 inhibits the human body from the intake of vitamins and minerals and when it exceeds 8.5 the water becomes caustic and irritating (Gupta et al., 2017). The turbidity of water relates to the ability of water to allow or impede the penetration of light due to the scattering effect of suspended particulate matter in the water (Sukamari et al., 2020). Simply put, turbidity in water is the degree of its cloudiness or clarity.
WHO advises that should the turbidity of groundwater supplies exceed 1NTU, then it becomes imperative to determine whether there is a potential risk for such water to cause health problems due to bacteria or nitrate pollution (World Health Organization, 2017). Consequently, groundwaters with a turbidity greater than 1 NTU should be sampled for bacteria and nitrate. The WHO standard as well as the NSDWQ standard for turbidity concerning potability of water is a value of not more than 5 NTU or equal to
5NTU. By these standards, all sampled well meet the criteria of acceptance. The highest recorded value for turbidity was
NTU (Table 1) while the least value was 0.52 NTU and the mean of the mean of all wells was computed to be 2.00 NTU.
One of the very important indicator of organic and inorganic pollution in water is the amount of total solids dissolved in it. The higher the concentrations of solids in a given water the higher the degree of contamination irrespective of its source. Aside being a very important pollution indicator, TDS also plays a very important role in aesthetics of water for drinking. Water containing high concentrations of TDS is inferior with regard to palatability and may also produce unfavourable physiological reaction in the transient consumer (David K. et al., 2011; Kumar et al., 2016). With reference to Table 1, all TDS results fall quite below the recommended values of both WHO and NSDWQ standards. Similarly, the mean of the mean of all TDS value indicate that waters around Mubi may be generally fit for consumption as regards the TDS parameter.
With reference to the results presented in Tables 1, the TH values observed for the groundwater sources all fall within the acceptable limits for WHO considering the range of acceptability stipulated therein (100 mg/L as CaCO3 to 500 mg/L as CaCO3).and NSWDQ standards of less or equal to 500 mg/L for domestic supply. Conversely however, with regard to NSWDQ, all results but for DW4, DW6, DW7, DW10 and DW11 failed to meet standard. Total hardness in water is primarily due to the excess of Ca, Mg and Fe salts (Bairu et al., 2013). The high values for TH recorded may be as a result of the weathering of silicates which are present in the formation of the geology of the study area. Guillemant et al. (2000) and Sengupta, (2013) indicated that hard water has the tendency to influence mortality, in particular, cardiovascular mortality in addition to reproductive failure, cancer and Alzheimers disease.
Considering Table 2, it can be observed that all the major anions analysed were below their respective maximum allowable limits as per WHO and NSDWQ standards. Such low concentrations notwithstanding, nitrate concentrations of 10 mg/L and above poses a health threat to infants (Sharma & Kaur, 2017) due to its ability to cause infant Methaemoglobin anaemia or the blue baby syndrome (WHO, 2017). Some health risks are associated with ingesting waters with high nitrate concentration even in adults. Ward et al. (2018) reported the risk of specific cancers (colorectal cancer, bladder and breast cancers) and birth defects when nitrate is ingested under conditions that increase formation of N-nitroso compounds.
High concentrations of sulphate has also been linked to some minor health concerns such as catharsis, dehydration and gastrointestinal irritation (Gulumbe et al., 2016). Hyperthyroidism and renal failure are major health concerns tied to high sulphate concentration in drinking water (Sharma & Kaur, 2017).
Anthropogenic and natural sources of the major anions analysed are presented in Table 4.
Table 1: Statistical summary of groundwater characteristics for temperature, pH, turbidity, total dissolved solids and total hardness
Parameters ( Â± )
Mean of mean
=mean of wells, =standard deviation, TH (mg/L as 3)
Table 2: Statistical summary of groundwater characteristics for chloride, sulphate, nitrate and phosphate
Parameters ( Â± )
Mean of mean
=mean of wells, =standard deviation
From the results presented in Table 3, it is observed that all the light and heavy metals analysed recorded values below both the WHO and NSDWQ standards except for iron and manganese. Iron exceeded the maximum allowable concentration in all well water samples and while manganese failed in two wells (DW2 and DW6) by NSDWQ standard. The highest iron concentration exceeded both
standards by 483.33%. The presence and the relative high concentrations of the light and heavy metals is as a result of reductive dissolutions of the soil minerals (Egbueri, 2020; Khozyem et al., 2019).containing high TDS is of inferior palatability and may produce unfavorable physiological reaction in the transient consumer (David K. et al., 2011; Kumar et al., 2016).
Table 3: Statistical summary of groundwater characteristics for sodium, calcium, magnesium and manganese and iron
Parameters ( Â± )
Mean of mean
=mean of wells, =standard deviation
Table 4: Some anthropogenic
and natural sources
of anion pollution in grou
Possible anthropogenic sources
Batabyal & Chakraborty (2015)
Kelly et al. (2012)
Gulumbe et al. (2016)
Elahcene et al. (2019) Sharma & Kaur, (2017) Egbueri, (2020)
DAlessandro et al., (2012).
DAlessandro et al., (2012).
<>Fadiran et al. (2008) Nemati Varnosfaderany et al.( 2009)
decomposition of rocks and minerals,
Fadiran et al. (2008) Nemati Varnosfaderany et al.( 2009)
saline water intrusion
application of de-icers,
weathering of salt- bearing geological formations,
Chloride from marine aerosols or volcanic gases in precipitation and dry deposition
wastewater and septic system effluent,
discharge of industrial wastes
washing of acidic lateritic soils,
oxic conditions that could convert sulfide (H2S) in soil to sulphate
leaching of gypsum, barite, epsom and
the dissolution of salts of sulfuric acid
usage of nitrogen based fertilizers,
disposal of wastes in proximity to the sampling locations
human-animal bodily wastes
leaching/washing of soils with animal waste material
wastewater and septic system effluent,
drinking water treatment,
weathering of soluble inorganic materials,
Test Conc. WHO NSDWQ
Figure 2: Compliance of tested groundwater with drinking water standards for high-value and moderate-value parameters.
Test Conc WHO NSDWQ
Figure 3: Compliance of tested groundwater with drinking water standards for high-value and moderate-value parameters.
Mean of Mean Conc. Values
Mean of Mean Conc. Values
The physicochemical parameters analysed, except for iron, manganese and TH. Iron failed by both standards adopted for checking the compliance of the waters sampled to the standards while manganese failed to meet the NSDWQ standard for DW2 and DW6. Furthermore, with regard to NSWDQ, all results of TH for DW4, DW6, DW7, DW10 and DW11 failed. The water quality of all locations sampled could be considered safe for domestic use with regard to their physicochemical character as determined by this study.
Mean of Mean Conc. Values
Mean of Mean Conc. Values
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