Evaluation of low-cost sorbents as potential materials for in situ remediation of water contaminated with heavy metals
Journal Title: Technologica Acta - Year 2017, Vol 10, Issue 2
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.
Authors and Affiliations
Nedeljka Vukojević Medvidović, Aleksandra Daković, Marin Ugrina, Marina Trgo, Ivona Nuić, Marija Marković
Keywords
Related Articles
- EP ID EP247808
- DOI -
- Views 114
- Downloads 0
Protonation of citraconic and glutaconic acid in perchloric acid media
The protonation process of citraconic and glutaconic acid in perchloric acid media was followed using the method of UV spectroscopy. The observed changes in the UV spectra of investigated acids confirmed that the protona...
EFFECTS OF BARLEY FLOUR ADDITION AND BAKING TEMPERATURE ON Β-GLUCANS CONTENT AND BISCUITS PROPERTIES
The aim of this study was to investigate opportunities to improve the nutritional value of biscuits. Therefore, the content of β-glucans, physical, chemical and sensory properties of biscuits were determined in relation...
Water determination in samples with high sugar and protein content
The aim of water determination should be detection of water and nothing but the water. Large number of methods use heating where the result shows loss of all volatile compounds and not only water. The result of these tec...
Recurrent water from slag and fly ash disposal ponds as a medium for carbon capture and storage
Due to the increased use of fossil fuels and industrial production, the concentration of carbon dioxide in the atmosphere increases, causing greenhouse effect and, consequently, climate change. Stationary CO2 sources lik...
Sensory properties of dairy products based on fresh cheese and fruit
Fermented dairy products are the favorite food of most consumers of all ages. To increase nutritional value, many fermented dairy products are mixed with grains and other additives. Fresh cheeses can be mixed with canned...