The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Humic acid is a degradation product of lignin, carbohydrate and protein. It is contained in soils and therefore it is often present in surface waters in small amounts, which vary with the seasons. Besides giving the waters a yellowish to brownish color, the humic acid can also cause fouling problems in filtration of surface waters. In the present study humic acid was studied in different types of...