Removal of nitrates and organic compounds from aqueous solutions by zero valent (ZVI) iron reduction coupled with coagulation/precipitation process

• Autorzy: Wiśniowska Ewa , Włodarczyk-Makuła Maria

Identyfikatory

DOI

10.24425/aep.2020.134532

• Języki publikacji: EN

Abstrakty

EN

The removal of nitrates from aqueous solutions is cumbersome because of their high solubility in water. The use of zero-valent iron (ZVI) for the reduction of nitrates is the chemical process and it is an alternative method to the biological ones. The aim of the present study was to evaluate the effectiveness of nitrates removal from water solution by using the ZVI process. The process was coupled with the removal of COD, phosphates and turbidity by using by-products of nitrates reduction. Batch tests were performed to evaluate the effectiveness of ZVI in the removal of nitrates from aqueous solutions. The effectiveness of nitrates removal was analyzed after 5, 10, 20, 30 and 60 min. and compared to the initial concentration of pollutants. Simultaneously analysis of ammonium nitrogen and nitrites was controlled to identify products of nitrates reduction under various pH. The removal of COD, phosphates and turbidity was also performed in batch tests. The effectiveness of the removal by using three types of chemicals was compared – PIX, FeSO₄, and waste Fe²⁺/Fe³⁺ from the ZVI process. The results obtained in the study indicate that ZVI can be effectively used in the treatment of water polluted with nitrates and the by-products of the process could be further applied in the removal of COD, phosphates and turbidity. Based on the results the method should be advised as a promising alternative to the technologies used nowadays under technical scale as a technology that fits with a circular economy.

Słowa kluczowe

EN

coagulation; nitrates; reduction process; zero valent iron; ZVI

• Wydawca: Institute of Environmental Engineering, Polish Academy of Sciences
• Czasopismo: Archives of Environmental Protection
• Rocznik: 2020
• Tom: Vol. 46, no. 3
• Strony: 22--29
• Opis fizyczny: Bibliogr.32 poz., rys., wykr.

Twórcy

autor

Wiśniowska Ewa

• Częstochowa University of Technology, Poland

autor

Włodarczyk-Makuła Maria

• Częstochowa University of Technology, Poland

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).