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dc.creatorKostić, Mirjana
dc.creatorVukčević, Marija
dc.creatorPejić, Biljana
dc.creatorKalijadis, Ana
dc.date.accessioned2021-03-10T12:19:09Z
dc.date.available2021-03-10T12:19:09Z
dc.date.issued2014
dc.identifier.isbn978-163117274-8
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/2581
dc.description.abstractHemp (Cannabis sativa) was most likely the first plant cultivated by mankind for its textile use. Currently, the interest in hemp is focused on its use as a raw material for the production of environmentally friendly clothes, technical textiles and composite materials. The increased production of hemp fibers in textile industry brings the considerable amount of waste in the form of short and entangled fibers. The cost of waste disposal can be minimized by recycling the waste in the way of producing useful lowcost products. Following the general trend of finding low-cost and easily available adsorbent, waste short and entangled hemp fibers were utilized as a heavy metal biosorbents. Due to the specific structure and heterogenous chemical composition (cellulose, hemicelluloses, lignin, pectin), short hemp fibers as biosorbent offer an effective way to decrease Pb2+, Cd2+ and Zn2+ ion concentration in wastewaters. The influence of hemp fiber chemical composition on their heavy metal ions sorption potential, were assessed by evaluating the water and metal ions uptake capacities of differently modified hemp fibers. The process of heavy metal ions biosorption on short hemp fibers was clarified by mathematical model development. Proposed mathematical model provides a better insight into phenomena of different ions transport through porous fiber matrices, and possibility of optimization of the complex process of biosorption. This is from great importance in the case of using short hemp fibers as filter material for removing the heavy metal ions from polluted water. Furthermore, there is a growing interest in using different type of waste biomass for production of carbon materials as a sorbents for water purification. From that aspect, short and entangled hemp fibers were used as low-cost precursor for production of carbon materials. Chemical modification of hemp fibers, prior to carbonization, affects the specific surface area, amount of surface oxygen groups and morphology of carbonized hemp fibers. Furthermore, activation of carbonized materials with potassium hydroxide improves sorption properties of carbonized hemp fibers by increasing the specific surface area (up to 2192 m2/g) and amount of surface oxygen groups. Due to the good adsorption properties toward heavy metals and pesticides, carbonized and activated hemp fibers were successfully used as a sorbent for the purification of water polluted with pesticides and heavy metals. Also, activated hemp fiber sorbent used for analyte preconcentration in the solid-phase extraction procedure (SPE) for pesticide analysis in water samples, showed even higher efficiency in pesticides preconcentration than expensive commercial cartridges. Sorption process of heavy metal ions and structural parameters of carbonized hemp fibers were described by upgrading already proposed mathematical model. A good agreement between model prediction and the experimental data indicates that the proposed mathematical model can be used for optimization of heavy metal ions adsorption process by correlating the model parameters to the carbonized hemp fibers performances.en
dc.rightsrestrictedAccess
dc.sourceTextiles: History, Properties and Performance and Applications
dc.subjectBiosorptionen
dc.subjectCarbonization and activationen
dc.subjectChemical modificationen
dc.subjectHemp fibersen
dc.subjectMathematical modelingen
dc.titleHemp Fibers: Old Fibers - New Applicationsen
dc.typebookPart
dc.rights.licenseARR
dc.citation.epage446
dc.citation.other: 399-446
dc.citation.spage399
dc.identifier.pmid
dc.identifier.rcubhttps://hdl.handle.net/21.15107/rcub_technorep_2581
dc.identifier.scopus2-s2.0-84948959179
dc.type.versionpublishedVersion


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