TITLE:
Evaluation of the Physico-Chemical Quality and Potability of Groundwater Consumption in Department of Collines at Benin
AUTHORS:
Okoundé Kotchikpa Jean-Eudes, Ringo Fernand Avahounlin, Carine Nelly Kélomé, Ouassa Pierre, Adjoa Mirande Hermione Adéké, Expédit Wilfried Vissin
KEYWORDS:
Collines Department, Physico-Chemical Parameters, Groundwater, Physico-Chemical Parameters, Potability of Underground Water
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.10 No.1,
January
10,
2022
ABSTRACT: The purpose of this study is to assess the physical and chemical quality
of borehole water intended for consumption in the collines department in Benin.
At the end of a sampling campaign, twenty-one (21) drinking water points were
sampled. Different physico-chemical parameters were measured using standard
analysis methods. The results of the analysis of the samples, showed that the
groundwater of the department of the hills is characterized by a neutral pH and an average electrical conductivity in
accordance with the WHO and Benin standard relating to the potability of
groundwater. With this pH neutrality which would be linked to the nature of
geological formations made up of crystalline rocks, the water in the hills is
moderately hard with hardness values of 208 mg/L on average for magnesium ions of 22.54
mg/L on average and calcium ions of the order of 46.03 mg/L on average at the
scale of the various localities and an alkalinity is of 43.81 mg/L on average.
The values between 0 and 163.91 mg/L are low in the South-East and very high, even
exceeding the standard accepted by WHO in the West and North-East of the study
area. This nitrate pollution and the fairly high levels of organic matter in
total nitrogen observed in the groundwater of the hills could also have an impact
on the vulnerability of the water table. And this pollution with nitrates
associated with electrical conductivity and chloride levels modifies and
degrades from one drinking water point to another the potability of underground
water in the hills.