Preparation of novel anion exchangers from pine sawdust and bark, spruce bark, birch bark and peat for the removal of nitrate

Nitrate Uptake from Water by Means of Tailored Adsorbents

“…In fact, N content of the samples and basic functionalities present on adsorbent surfaces should contribute on nitrate ion uptake. Present results are in accordance with other findings suggesting that protonated amino groups and oxygen basic functionalities, such as pyrones and cromenes, could contribute to an enhanced development of the surface positive charge on the surface of the adsorbent, which should facilitate the uptake of nitrate ions (Keränen et al 2013;Nunell et al 2012). Moreover, the X mL values obtained in this work are higher than those previously reported in the literature for the adsorption of nitrate onto different activated carbons (Bhatnagar et al 2008;Demiral and Gündüzoğlu 2010;Mahmudov and Huang 2011;Nunell et al 2012;Ota et al 2013).…”

“…Adsorption represents an attractive option as it is considered a simple, fast, and inexpensive method. Various adsorbents have been examined for the removal of this priority pollutant from aqueous solution including organoclays and organosilicas (Bagherifam et al 2014;Seliem et al 2013), graphene (Ganesan et al 2013), red mud (Cengeloglu et al 2006), layered double hydroxides (Islam and Patel 2010), and modified pine sawdust (Keränen et al 2013). Activated carbons are one of the most studied adsorbents, due to their versatility and wide range of application, although these materials are not very effective for the removal of nitrate ions from water (Mukherjee and De 2014;Loganathan et al 2013;Cho et al 2011;Öztürk and Bektas 2004).…”

Nitrate uptake improvement by modified activated carbons developed from two species of pine cones

“…Several methods have been used for the removal of nitrate from water including ion-exchange resin, chemical reduction, electrodialysis, biological denitrification, reverse osmosis, nanofiltration [3,9,[14][15][16][17][18][19][20][21]. However, such methods usually suffer from low treatment efficiency and high operation costs.…”

Nitrate sorption by modified Lagenaria vulgaris biomass: Kinetic and equilibrium studies

“…Osim nativne biomase, od značaj-ZASTITA MATERIJALA 58 (2017) broj 4 531 nog interesa za ove svrhe su sorbenti koji se mogu dobiti kroz niz jednostavnih fizičkih i hemijskih modifikacija otpadnih biomasa [13]. Novi alternativni sorbenti različitih anjonskih vrsta na bazi biomase postali su sve više predmet naučnih istraživanja, obzirom da biomase zbog svojih jedinstvenih osobina (adsorptivnost, biokompatibilnost, biodegradabilnost i hidrofilnost) predstavljaju funkcionalni ekološki materijal [14,15]. Ligno-celulozna biomasa kore tikve sudovnjače Lagenaria vulgaris (LV) predstavlja dragoceni agrootpad za ove svrhe.…”