Naslov
Nitrate removal from water using quaternized hazelnut shell and grape seed

Autori
Nujić, Marija ; Habuda-Stanić Mirna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
17th European Meeting on Environmental Chemistry - EMEC 17 - Book of Abstracts / Gibb, Stuart - Inverness, 2016, 38-38

Skup
The 17th European Meeting on Environmental Chemistry

Mjesto i datum
Inverness, Ujedinjeno Kraljevstvo, 30.11.2016. - 02.12.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
nitrati; poljorpivredni otpad; ionska izmjena
(nitrate; agricultural residues; ion exchange)

Sažetak
Nitrogen and phosphorus are emerging pollutants in agricultural and wastewaters. These compounds can cause eutrophication and are the limiting factor of algae growth in most ecosystems. In addition, excessive nitrate intake causes serious health problems in humans. Therefore, the World Health Organization (WHO) stipulated nitrate concentration limit of 50 mg NO3-/L. Several techniques have been used worldwide for nitrate removal from water: reverse osmosis, electrodialysis, adsorption and ion-exchange. Among all above mentioned, ion-exchange is considered to be the one of the simplest and safest method for nitrate removal. In the past years, there has been a growing interest in preparation of ion-exchange resin from agricultural residues. In this research, hazelnut shell and grape seed were used in the preparation of anion exchangers by epichlorohydrin-triethylamine method (ETM method). Batch tests were used to define the efficiency of nitrate removal using modified hazelnut shell (MHS) and grape seed (MGS), i.e. the effects of initial nitrate concentration (10 – 300 mg NO3-/L) and solution temperature (25 – 45 °C) were examined. Langmuir, Freundlich and Dubinin-Radushkevich isotherm models were used to study the obtained equilibrium data. The ion exchange efficiency of MHS and MGS were tested in column experiments and results showed that the sorption effect of resin bed sustained well during three sorption/desorption cycles. The results reported that these agricultural residues have the potential to be used as low-cost sorbents for nitrate removal from contaminated waters.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA