Analysis of the Physico-Chemical Parameters of the Water of the River of Mahavavy Situated in the District of Ambilobe, in the Region of Diana (DIEGO SUEREZ)

摘要

The Region of DIANA: it is a set of 5 Districts like; Diego I, Diego II; Nosy-Be; AMBANJA and AMBILOBE. My research on the Mahavavy River, in the district of AMBILOBE, is to the south of the chief place of DIANA that is to say of Diego Suarez. The objective of this work is to determine the concentrations of: Physical parameters such as: the temperature is 19.6°C., the turbidity is 3.26 NTU per turbidimeter, the pH is 7.21 by the pH meter, and the conductivity is 53.8 μs/cm measured by conductivity meter, for the three required standards (MS, WHO, EU). For chemical parameters: 50 mg/L mineralization, total hardness 6.5 °f, calcium hardness 2.5 °f, and Alcalimetric titre 0 °f, Calcium 10 mg/L; Magnesium 9.48 mg/L; Carbonates 0 mg/L; Bicarbonates 29.28 mg/L; Organic Matter 1.34 mg/L; Ammonium 0.16 mg/L; Total iron 0.02 mg/L; Chlorides 4.26 mg/L; Sulfates 4.58 mg/L; Nitrites 0.03 mg/L; Nitrates 4.39 mg/L; Sodium 2.76 mg/L, the concentrations found are admissible to the three international standards, despite some deficiencies of measured concentrations such as: Calcium, Magnesium and Chloride, the method used to measure cations such as Sodium, Calcium, Iron and magnesium is spectrometry, atomic absorption with flame. For the microbiological: Coliform bacteria > 2400 NPP/100mL with the method ISO 9308; Escherichia Coli 2 NPP/100mL by the method ISO 9308 NPP/100mL and Intestinal Enterococci 1 NPP/100mL by the method IDX 33/03- 10/13, and the criteria are all null, therefore the elements sought do not meet the required criteria.