Utilization of Sugar Beet Pulp as Biosorbent for Molassigenic Metal Ions: Kinetic Study of Batch Biosorption

被引:1
|
作者
Tukuljac, Lidija Peic [1 ,2 ]
Krulj, Jelena [2 ]
Pezo, Lato [3 ]
Maravic, Nikola [1 ]
Kojic, Jovana [2 ]
Seres, Zita [1 ]
机构
[1] Univ Novi Sad, Fac Technol Novi Sad, Bulevar Cara Lazara 1, Novi Sad 21000, Serbia
[2] Univ Novi Sad, Inst Food Technol Novi Sad, Bulevar Cara Lazara 1, Novi Sad 21000, Serbia
[3] Univ Belgrade, Inst Gen & Phys Chem, Studentski Trg 12-16, Belgrade 11000, Serbia
关键词
AQUEOUS-SOLUTION; CHEMICAL-MODIFICATION; COPPER IONS; PECTIN; OPTIMIZATION; DESORPTION; REMOVAL; ADSORPTION; WASTE; EQUILIBRIUM;
D O I
10.3311/PPch.19783
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The sugar industry is facing problems with high amount of molassigenic metal ions remained after the purification step in sugar juice. In this investigation the application of unmodified sugar beet pulp as a weak monofunctional cation-exchange biosorbent for molassigenic metal ions (Na+, K+ and Ca2+) removal from the alkalized sugar juice was studied. The batch biosorption experiments were performed at temperature (70 ??C) and pH (10.5) of alkalized sugar juice similar to industrial conditions. The highest removal efficiency was noticed for divalent Ca2+ (30.2%), while monovalent Na+ and K+ ions were removed with 10.9 and 9.1% efficiency, respectively. Biosorption equilibrium was established in 90 min for all tested metals. Sugar beet pulp characterization from the perspective of cationexhange material was conducted. The structure of the biosorbent and an insight of the functional groups were also characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. The biosorption data were analyzed using four nonlinear kinetic (pseudo-first order, pseudo-second order and Elovich) and diffusion models (Weber-Morris). The time course data of biosorption processes fitted well to the pseudo-first and the pseudo-second-order kinetic models indicating ion-exchange and chemisorption as dominant mechanisms for metal ions removal from the alkalized juice. HNO3 as a desorption reagent showed the highest average molassigenic metal ions desorption efficiency (54.4%). Utilization of sugar beet biomass as cation-exchange material imposes as a potential solution for more successful sugar juice purification. sugar beet pulp, alkalized juice, biosorption, molassigenic metal ions
引用
收藏
页码:629 / 640
页数:12
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