Open AccessConsumul chimic de oxigen în apele râului Prut
Author(s) -
Ivanova Anastasia
Publication year - 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.53937/9789975151979.05
Subject(s) - chemical oxygen demand , biochemical oxygen demand , manganese , water quality , oxygen , environmental chemistry , pollution , surface water , water pollution , chemistry , environmental science , environmental engineering , wastewater , biology , ecology , organic chemistry
Chemical oxygen demand (COD) was determined in water samples from the Prut River during 2020. Mean values of CODMn and CODCr ranged from 3.5 to 9.0 mg O2/L (5.5 ± 1.2 mg O2/L) and from 12 to 45 mg O2/L (22 ± 8.7 mg O2/L) respectively. The analysis of the results demonstrates the existence in the waters of the Prut River of easily degradable organic substances (an indicator of fresh and permanent pollution) and those that are difficult to degrade. According to the requirements of the Regulation on the quality of surface waters, the water from the Prut River for the period studied in accordance to the chemical oxygen demand with manganese is assigned to quality class I-II (very good – good), and after chemical oxygen demand with chrome – to class II-III (good – moderately polluted).