تقييم بعض الأملاح و الهالوجينات لمياه الشرب ببلدية الدائرة الثالثة لمدينة أنجمينا-تشاد

الملخص EN

This study was conducted in the municipality of the 3th district.

With an area of 619, 000 km2 and an estimated population of 68,496 inhabitants and classified as lower-density.

Water samples were collected before treatment ( directly from the artesian well) and after treatment (from the water distribution network) from three stations of the Chadian Water Company (STE) in the third district which is:[ Marche ( Grand Marche), Koufra )A cote DTH),ENS2 )Ecole de Centre)[ the salts and halogens of these samples were determined in the laboratory of the food quality and control center (CECOQDA) according to the approved standard methods.

The results of the analyzes for various properties were compared with the permissible values and limits of the World Health Organization and some health and environmental bodies and institutions.

this study concluded that the properties of all salts and halogens in the water samples before treatment are more than in the water samples after treatment.

The highest average of calcium and magnesium respectively was recorded for water samples before treatment in the third stations ENS2 )1.53,3.40 mg/l) As for the water samples after treatment, The highest average was recorded of calcium was recorded in the same station ENS2 (1.05 mg/l).and all the average readings for the (samples before and after treatment) are within the the permissible limits of (FAO,2020) and (WHO,2004).

As for fluorine it has the highest average for samples before treatment in the third stations ENS2 ) 2.23mg/l/) it also recorded The highest average for fluorine for samples after treatment same station ENS2 (1.19 mg/l).

The highest average for bromine was recorded in the first station Marche (2.45 mg/l) for samples before treatment.

it also recorded The highest average for bromine for samples after treatment in the third stations ENS2 ),1.52 mg/l).

As for iodine it recorded the highest reading in the second station Koufra (3.50 mg/l) and the highest average in the same station Koufra (4.93 mg/l) for samples before treatment.

it also for samples after treatment recorded the highest reading in the first station Marche (3.9.

mg/l) and the highest average in the third station ENS2 ),3.60 mg/l) for samples after treatment.