Uklanjanje aniona arsena iz podzemne vode na funkcionaliziranim adsorbensima
Groundwater is the main source of drinking water in eastern Croatia and the population of nearly 200,000 people daily drinking water with arsenic concentration over the 10 μg L-1. The removal of arsenic anions from aqueous solutions and groundwater using the sorbents: biosorbents, zeolites and activated carbons were investigated. All adsorbents were functionalized with ferric ions before examination using different methods of modification. The influence of experimental parameters variations, including initial As(V) concentration, adsorption time, pH and temperature were examined using standard solutions of As(V) and aerated groundwater of the Osijek area. The influence of each parameter was determined, and obtained data were fitted by Freundlich and Langmuir isotherm models. Thermodynamic parameters for the adsorption systems were determined at 25°C, 35°C and 45°C. Obtained adsorption models points out that the adsorption capacity decreased by increasing the As(V) ions concentration and pH value, while longer time contact between arsenic and adsorbent increased efficiency of arsenic removal. Finally, one of the main goals of this study was determination of temperature influence on adsorption system, and experimental results showed that, in the case of zeolites and two types of commercially available activated carbons, the increase of adsorption capacity with temperature appears to be related to a higher arsenic dissociation, while biopolymeric adsorbents showed strong decrease of adsorption capacity with temperature increasing.
|Creator||Habuda-Stanić, Mirna (Search Europeana for this person)|
|Collection||Josip Juraj Strossmayer University of Osijek. FACULTY OF FOOD TECHNOLOGY. Department of Applied Chemistry and Ecology. Sub-department of Chemistry and Ecology.|
|Subject Terms||BIOTECHNICAL SCIENCES. Food Technology. Engineering., Public health engineering. Water. Sanitation. Illuminating engineering, water, groundwater, arsenic, biosorbents, zeolites, activated carbon, purifyng|
|Provider||National and University Library in Zagreb|