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Technologica Acta : Scientific/professional journal of chemistry and technology, Vol. 10 No. 2, 2017.

Original scientific paper

Evaluation of low-cost sorbents as potential materials for in situ remediation of water contaminated with heavy metals

Nedeljka Vukojević Medvidović ; Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
Aleksandra Daković ; Institute for Technology of Nuclear and Other Mineral Raw Materials, Franche d' Epre 86, 11000 Belgrade, Serbia
Marin Ugrina ; Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
Marina Trgo ; Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
Ivona Nuić ; Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, 21000 Split, Croatia
Marija Marković ; Institute for Technology of Nuclear and Other Mineral Raw Materials, Franche d' Epre 86, 11000 Belgrade, Serbia

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Abstract

The aim of this paper was to examine the possibilities of using various low-cost sorbents as material for permeable reactive barrier for efficient removing of lead, cadmium, copper and zinc from contaminated water. Natural zeolite (NZ), iron-modified zeolite (IMZ), apatite, concentrated apatite, kaolin and raw bentonite were examined. The batch test evaluation was used to investigate capturing of heavy metals from contaminated water onto sorbents, as well as retention strength of saturated sorbent. The change of pH values during saturation and leaching of heavy metals was performed in a slightly acidic to neutral area, confirming buffering abilities and environmental acceptability of all investigated sorbents as a material in PRB for protection of groundwater as the most valuable natural resources. The highest saturation ability towards all examined heavy metals was detected with raw bentonite and IMZ. Leaching of heavy metals at pH=2.94-2.98 was confirmed in all saturated sorbents, while at pH=6.07-6.46 it was not detected, except of Pb and Cd in raw bentonite. From the obtaned results, the recommendation for selection of sorbent for treatment of water contaminated with lead, cadmium, cooper and zinc is given.

Keywords

low-cost sorbent; leachability; permeable reactive barrier; heavy metals (zinc, copper, cadmium, lead)

Hrčak ID:

191413

URI

https://hrcak.srce.hr/191413

Publication date:

23.12.2017.

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