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Article

Immobilised Humic Substances as Low-Cost Sorbents for Emerging Contaminants

1
Department of Environmental Science, University of Latvia, LV-1004 Riga, Latvia
2
Institute of Chemical Physics, University of Latvia, LV-1004 Riga, Latvia
3
Department of Physics, Riga Stradins University, LV-1067 Riga, Latvia
*
Author to whom correspondence should be addressed.
Academic Editor: Bin Gao
Received: 24 February 2021 / Revised: 17 March 2021 / Accepted: 24 March 2021 / Published: 28 March 2021
(This article belongs to the Special Issue Environmental Chemical: Pollution, Analysis and Restoration)
Environmental pollution with contaminants of emerging concern (CECs) is a worldwide problem that is receiving increasing attention. Although these substances have been released in the aquatic environment for a long time, wastewater treatment plants are still incapable of removing emerging contaminants completely. Consequently, trace metals, metalloids and pharmaceuticals, as well as surfactant leftovers, are often found in environmental samples. Environmentally friendly and cost-effective sorbents such as humic substances can be used for purification if their sorption properties are increased by immobilization. To our knowledge, immobilized humic substances have not been widely studied as sorbents up to now. In this study, humic substances were immobilized to obtain low-cost sorbents. The chosen methods for characterization of the obtained sorbents showed successful immobilization. Traditional pollutants, such as Cr(III) (a metal), As(V) (a metalloid) and chlorpromazine (a pharmaceutical), were used as representative contaminants. Sorption experiments were conducted using the batch system, and sorption was also studied based on the sorbent dosage, initial concentration of the studied element or substance, solution pH and sorption time. The results show that all the obtained immobilized humic substances in this study can be used as sorbents to remove contaminants from water. At the same time, from these humic substances, only those immobilized using iron compounds are suitable for the removal of arsenic. View Full-Text
Keywords: humic substances; immobilization; contaminants of emerging concern; chromium; arsenic; pharmaceuticals humic substances; immobilization; contaminants of emerging concern; chromium; arsenic; pharmaceuticals
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MDPI and ACS Style

Ansone-Bertina, L.; Upska, K.; Dobkevica, L.; Kviesis, J.; Meija, R.; Klavins, M. Immobilised Humic Substances as Low-Cost Sorbents for Emerging Contaminants. Appl. Sci. 2021, 11, 3021. https://0-doi-org.brum.beds.ac.uk/10.3390/app11073021

AMA Style

Ansone-Bertina L, Upska K, Dobkevica L, Kviesis J, Meija R, Klavins M. Immobilised Humic Substances as Low-Cost Sorbents for Emerging Contaminants. Applied Sciences. 2021; 11(7):3021. https://0-doi-org.brum.beds.ac.uk/10.3390/app11073021

Chicago/Turabian Style

Ansone-Bertina, Linda, Karina Upska, Linda Dobkevica, Jorens Kviesis, Raimonds Meija, and Maris Klavins. 2021. "Immobilised Humic Substances as Low-Cost Sorbents for Emerging Contaminants" Applied Sciences 11, no. 7: 3021. https://0-doi-org.brum.beds.ac.uk/10.3390/app11073021

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