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2018, vol. 59, br. 1, str. 67-76
Novi biosorbent na bazi vlakna konoplje (Cannabis sativa) i Ca-alginata za uklanjanje jona olova i cinka
Univerzitet u Beogradu, Tehnološko-metalurški fakultet

e-adresammilan@tmf.bg.ac.rs
Ključne reči: adsorpcija; alginat; vlakna konoplje; biokompozit; Pb(II); Zn(II)
Sažetak
U ovom radu ispitana je mogućnost primene novog biosorbenta, na bazi kratkih hemijski modifikovanih vlakana konoplje impregniranih alginatnim gelom, za adsorpciju jona olova(II) i cinka(II). Biosorbent na bazi alginata i alkalno tretiranih vlakana konoplje okarakterisan je sa aspekta strukture i morfologije primenom skenirajuće elektronske mikroskopije (SEM) i prirode funkcionalnih grupa korišćenjem infracrvene spektroskopije sa Furijeovim transformacijama (FT-IR). Adsorpcione karakteristike ovog kompozita, ispitivane su praćenjem kinetike adsorpcije jona olova i cinka, i upoređene su sa adsorpcionim karakteristikama alkalno tretiranih vlakana konoplje. Podaci dobijeni tokom adsorpcije, testirani su korišćenjem Lagergrenovog modela pseudo-prvog reda i pseudo-drugog reda, kao i modela intračestične difuzije. Slaganje modelnih i eksperimentalnih podataka pokazuje da adsorpcioni proces prati kinetiku pseudo-drugog reda, što upućuje na zaključak da tokom adsorpcije jona olova i cinka na površini ispitivanih uzoraka konoplje i kompozita alginat-konoplja, preovladava mehanizam hemisorpcije. Ova zapažanja su potvrđena i rezultatima FT-IR analize, koji pokazuju da se joni teških metala vezuju na karboksilnim, i delimično hidroksilnim grupama prisutnim na površini ispitivanog biokompozita. Na osnovu dobijenih rezultata zaključuje se da se novi biosorbent može uspešno koristiti, kao jeftin i efikasan adsorbent za uklanjanje jona teških metala iz vode.
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O članku

jezik rada: srpski
vrsta rada: naučni članak
DOI: 10.5937/ZasMat1801069M
objavljen u SCIndeksu: 21.03.2018.
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