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Adsorption characteristics of chitooligosaccharides onto activated charcoal in aqueous solutions
Yu Yu1; Li Kecheng2,3
Corresponding AuthorLi Kecheng(
AbstractTo investigate the adsorption characteristics of chitooligosaccharides in solution onto activated charcoal, we studied the optimal adsorption conditions and the adsorption mechanisms of the chitooligosaccharides onto activated charcoal, which will greatly promote the application of activated charcoal in the chitooligosaccharides separation and purification. We studied the effects of particle size of activated charcoal, pH of solution, contact time, temperature, and initial concentration of chitooligosaccharides on the adsorption behavior in batch mode experiments. Activated charcoal in fine particle size showed a high uptake of chitooligosaccharides. Weak alkaline solution (pH 8-9) was the most favorable to the adsorption. The adsorption equilibrium after 60 min was established, which followed a pseudo-second-order kinetic model. The adsorption capacity (Q(max)) reached 0.195 g/g (chitooligosaccharides/activated charcoal) at 298 K. The adsorption was temperature-insensitive, and the adsorption isotherms could be best described by the Langmuir equation. Chitooligosaccharides adsorbed on activated charcoal could be desorbed in 50% ethanol solution in combination with an acidic condition (pH 2), reaching desorption efficiency of 96.0%. These findings are of great significance for the production and purification of amino oligosaccharides including chitooligosaccharides using activated charcoal.
Keywordchitooligosaccharide adsorption activated charcoal kinetics isotherm
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[41976096] ; National Key R&D Program of China[2018YFC0311305] ; Open Fund of CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences[KLMEES201805] ; Talent Research Foundation of Qingdao Agricultural University[1114347]
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000491530200001
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Document Type期刊论文
Corresponding AuthorLi Kecheng
Affiliation1.Qingdao Agr Univ, Marine Sci & Engn Coll, Qingdao 266109, Shandong, Peoples R China
2.Chinese Acad Sci, Ctr Ocean Megasci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Shandong, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Drugs & Bioprod, Qingdao 266237, Shandong, Peoples R China
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yu Yu,Li Kecheng. Adsorption characteristics of chitooligosaccharides onto activated charcoal in aqueous solutions[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2019:9.
APA Yu Yu,&Li Kecheng.(2019).Adsorption characteristics of chitooligosaccharides onto activated charcoal in aqueous solutions.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,9.
MLA Yu Yu,et al."Adsorption characteristics of chitooligosaccharides onto activated charcoal in aqueous solutions".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2019):9.
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