Next Article in Journal
A Comparative Assessment of Variable Selection Methods in Urban Water Demand Forecasting
Previous Article in Journal
The Suitability of Pozzolan as Admixing Aggregate for Fe0-Based Filters
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessArticle
Water 2018, 10(4), 418; doi:10.3390/w10040418

Removal of Sb(III) and Sb(V) by Ferric Chloride Coagulation: Implications of Fe Solubility

Graduate School of Water Resources, Sungkyunkwan University (SKKU) 2066, Suwon 16419, Korea
Department of Chemical and Molecular Engineering, Hanyang University, Ansan 15588, Korea
Author to whom correspondence should be addressed.
Received: 22 February 2018 / Revised: 23 March 2018 / Accepted: 2 April 2018 / Published: 3 April 2018
View Full-Text   |   Download PDF [15587 KB, uploaded 3 April 2018]   |  


Coagulation and precipitation appear to be the most efficient and economical methods for the removal of antimony from aqueous solution. In this study, antimony removal from synthetic water and Fe solubility with ferric chloride (FC) coagulation has been investigated. The effects of pH, FC dosage, initial antimony loading and mixed Sb(III), Sb(V) proportions on Fe solubility and antimony removal were studied. The results showed that the Sb(III) removal efficiency increased with the increase of solution pH particularly due to an increase in Fe precipitation. The Sb(V) removal was influenced by the solution pH due to a change in Fe solubility. However, the Fe solubility was only impaired by the Sb(III) species at optimum pH 7. The removal efficiencies of both Sb species were enhanced with an increase in FC dose. The quantitative analysis of the isotherm study revealed the strong adsorption potential of Sb(III) on Fe precipitates as compared to Sb(V). Furthermore, the removal behavior of antimony was inhibited in mixed proportion with high Sb(V) fraction. In conclusion, this study contributes to better understanding the fate of Sb species, their mobilities, and comparative removal behavior, with implications for Fe solubility using ferric chloride in different aqueous environments. View Full-Text
Keywords: antimonite; antimonate; antimony removal; coagulation; Fe precipitates; water treatment antimonite; antimonate; antimony removal; coagulation; Fe precipitates; water treatment

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Supplementary material

Share & Cite This Article

MDPI and ACS Style

Inam, M.A.; Khan, R.; Park, D.R.; Lee, Y.-W.; Yeom, I.T. Removal of Sb(III) and Sb(V) by Ferric Chloride Coagulation: Implications of Fe Solubility. Water 2018, 10, 418.

Show more citation formats Show less citations formats

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

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top