Comparison of color measurement methods in wastewater

The metallic salts dissolved in water color, or colloid particles in the water. According to some other color parameter waters polluting parameter special attention.Although many of the pollutant parameters can be measured and evaluated objectively, the color parameter has a little bit of subjectivity as well as objective properties. Since the color parameter is reflected by light reflecting the salts and colloidal substances in the water, the wavelengths which provide the colors to be formed are the most important parameters to be considered in the measurement of the colors. These wavelengths determine both the color variations and the selection of the measurement method. Since the color formation in the water consists of both the colloid substances in the water and the dissolved substances, the measurement is measured both globally and after the water samples are filtered separately to determine where the color formation originates. Color measurement in water is measured by Standard Method 2120 C and TSE EN ISO 7887 B Spectrophotometric method. In order to reach the correct result in color measurements, the wavelengths that give the correct result for certain colors should be selected. If the same wavelength is selected for all colors, most of the results will be incorrect. Platinum-Cobalt value and single wavelength measurement method are used in our country. In this measurement, it gives correct results in yellow and orange color tones at 456 Nm wavelength and it is misleading in other colors. Therefore, different methods have been developed. These method are used in different countries; -ADMI, -RES . According to this; -Platin-Cobalt, 456 Nm wavelength, yellow-orange colors, -ADMI, 720 Nm wavelength, yellow-orange colors, -RES, 436 Nm, 525 Nm and 620 Nm wavelength, Yellow, Red and Blue measurements were made. It is not correct to use Pt-Co for all colors in our country. In this study, different color measurement methods have been studied and compared with each other and what color and the correct method for which wavelength can be determined. It was emphasized that the regulations in our country would not be correct to give a standard for a single method for all colors.