Next Article in Journal
Flood Risk Management with Transboundary Conflict and Cooperation Dynamics in the Kabul River Basin
Previous Article in Journal
Development and Verification of the Available Number of Water Intake Days in Ungauged Local Water Source Using the SWAT Model and Flow Recession Curves
Article

Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge

1
Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, 03225 Vilnius, Lithuania
2
Department of Chemistry and Bioengineering, Vilnius Gediminas Technical University, Sauletekio ave. 11, 10223 Vilnius, Lithuania
*
Author to whom correspondence should be addressed.
Academic Editor: Chicgoua Noubactep
Water 2021, 13(11), 1512; https://doi.org/10.3390/w13111512
Received: 29 April 2021 / Revised: 23 May 2021 / Accepted: 25 May 2021 / Published: 27 May 2021
(This article belongs to the Section Water and One Health)
Many countries are confronted with a striking problem of morbidity of fluorosis that appears because of an increased concentration of fluorides in drinking water. The objective of this study is to explore opportunities for removal of fluoride from aqueous solutions using cheap and easily accessible adsorbents, such as exhaustive coffee grounds and iron sludge and to establish the efficiency of fluoride removal. Twelve doses (1, 2, 3, 4, 5, 6, 10, 20, 30, 40, 50 and 60 g/L) of adsorbents were used and five durations of the sorption process (30, 60, 90, 120 and 150 min). The results showed that the most optimum dose of iron sludge for 3 mg/L of fluoride removal was 30 g/L and the contact time was 30 min, the efficiency of fluoride removal achieved 62.92%; the most optimum dose of exhausted coffee grounds was 60 g/L with the most optimum contact time of 60 min; at a dose of 50 g/L with contact time of 90 min, the efficiency of fluoride removal achieved 56.67%. Findings demonstrate that adsorbents have potential applicability in fluoride removal up to the permissible norms. View Full-Text
Keywords: fluorides; drinking water; sorption; exhausted coffee grounds; iron sludge fluorides; drinking water; sorption; exhausted coffee grounds; iron sludge
Show Figures

Figure 1

MDPI and ACS Style

Siaurusevičiūtė, I.; Albrektienė, R. Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge. Water 2021, 13, 1512. https://doi.org/10.3390/w13111512

AMA Style

Siaurusevičiūtė I, Albrektienė R. Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge. Water. 2021; 13(11):1512. https://doi.org/10.3390/w13111512

Chicago/Turabian Style

Siaurusevičiūtė, Irma, and Ramunė Albrektienė. 2021. "Removal of Fluorides from Aqueous Solutions Using Exhausted Coffee Grounds and Iron Sludge" Water 13, no. 11: 1512. https://doi.org/10.3390/w13111512

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop