Influence of Water Hardness on the Effectiveness of Coagulation of Humic Compounds

• Autorzy: Kaleta Jadwiga , Puszkarewicz Alicja

Identyfikatory

DOI

10.12911/22998993/108650

• Języki publikacji: EN

Abstrakty

EN

The laboratory tests presented in the article aimed at determining the influence of water hardness on the effectiveness of humic substances removal in the coagulation process. The tests were conducted on three model solutions; very soft water, soft water and semi-hard water. The concentration of humic substances in each solution was equal to 20 mg/dm³. Calcium hydroxide, ferric(III)chloride and aluminium sulphate(VI) were applied as coagulants. On the basis of the conducted tests, it was found that the increased content of calcium, and particularly of magnesium in water, improves the effectiveness of humic substances removal. The process effectiveness expressed by changes in colour and permanganate index was the highest for semi-hard water. A decrease in colour equal to 88.8% and in permanganate index – 72.1% was observed in this case for the largest dose of calcium. Even better results were obtained by applying the remaining coagulants; a decrease in colour amounted to 99%, and in permanganate index to 95%.

Słowa kluczowe

EN

water hardness; humic substances; coagulation process

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2019
• Tom: Vol. 20, nr 6
• Strony: 126--134
• Opis fizyczny: Bibliogr. 18 poz., rys., tab.

Twórcy

autor

Kaleta Jadwiga

• Faculty of Civil and Environmental Engineering and Architecture, Rzeszow University of Technology, ul. Poznańska 2, 35-084 Rzeszów, Poland

autor

Puszkarewicz Alicja

• Faculty of Civil and Environmental Engineering and Architecture, Rzeszow University of Technology, ul. Poznańska 2, 35-084 Rzeszów, Poland

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