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Microwave carbonized cellulose for trace pharmaceutical adsorption
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi.ORCID-id: 0000-0002-5850-8873
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Industriell bioteknologi.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Fiber- och polymerteknologi, Polymerteknologi.ORCID-id: 0000-0002-7790-8987
2018 (Engelska)Ingår i: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 346, s. 557-566Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A promising sustainable strategy to valorize cellulose to high-value adsorbents for trace pharmaceuticals, like diclofenac sodium (DCF), in the water is demonstrated. Carbon nanospheres (CN) as the DCF adsorbent were derived from cellulose through a one-pot microwave-assisted hydrothermal carbonization method. CN exhibited efficient DCF removal (100% removal of 0.001 mg/mL DCF in 30 s and 59% removal of 0.01 mg/mL DCF in 1 h). The adsorption kinetics and isotherm data were well-fitted with the pseudo-second-order kinetic model and Langmuir model, respectively. The adsorption process was endothermic and spontaneous as confirmed by the thermodynamic parameters. Multiple characterization techniques including SEM/EDS, FTIR, FTIR-imaging and zeta potential were applied to qualitatively investigate the adsorption process. π-π stacking and hydrogen bonding were proposed as the dominant adsorption interactions. CN also demonstrated effective adsorption capacity towards three other commonly-detected contaminants in the wastewater including ketoprofen (KP), benzophenone (BZP), and diphenylamine (DPA), each bearing partial structural similarity with DCF. The affinity of the contaminants towards CN followed the order DPA > BZP > DCF > KP, which could be explained by the different configurations and chemical units. It was speculated that for DCF and KP, the steric hindrance and electrostatic repulsion produced by dissociated carboxyl groups can impede the adsorption process as compared to DPA and BZP. This methodology could offer further insights into the drug adsorption on the cellulose-derived carbon adsorbents and the use of bioderived carbons for treatment of wastewaters contaminated with pharmaceuticals.

Ort, förlag, år, upplaga, sidor
Elsevier, 2018. Vol. 346, s. 557-566
Nyckelord [en]
Adsorption, Carbon nanosphere, Carbonization, Cellulose, Diclofenac, Microwave
Nationell ämneskategori
Kemi Polymerteknologi
Identifikatorer
URN: urn:nbn:se:kth:diva-227509DOI: 10.1016/j.cej.2018.04.014ISI: 000432878400057Scopus ID: 2-s2.0-85045434362OAI: oai:DiVA.org:kth-227509DiVA, id: diva2:1207013
Anmärkning

QC 20180518

Tillgänglig från: 2018-05-18 Skapad: 2018-05-18 Senast uppdaterad: 2019-04-10Bibliografiskt granskad
Ingår i avhandling
1. From Polysaccharides to Functional Materials for Trace Pharmaceutical Adsorption
Öppna denna publikation i ny flik eller fönster >>From Polysaccharides to Functional Materials for Trace Pharmaceutical Adsorption
2019 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The transition to bioeconomy will reduce our dependency on fossil fuels as well as contribute to a more sustainable society. Within this framework, exploitation and development of renewable substitutes to petroleum-based products provides feasible roadmap for the material design. Here a perspective is provided to how the natural polysaccharides chitosan (CS) and/or cellulose (CL) could be elaborated and transformed to high-performance materials with the explicit aim of removing trace pharmaceutical contaminants from the wastewater, thus facilitating the sustainable development. In the first part of the thesis, chitosan and cellulose were converted to the carbon spheres (C-sphere) through a microwave-assisted hydrothermal carbonization process, and C-sphere was further broken down to the nanographene oxide (nGO) via a simple oxidation route. On this foundation, a green pathway was developed for fabrication of biobased materials for wastewater purification. First, macroporous chitosan-based composite hydrogels with controllable properties were developed, where chitosan-derived nGO worked as a functional property enhancer. Second, a further development changing from the bulky hydrogels to microgels consisting of CS composite particles in the microscopic size was achieved by a fast one-pot spraying-drying process. The crosslinking reaction occurred in situ during the spray-drying. Last, the C-sphere by-itself was also believed to be a potential adsorbent for wastewater contaminants. In the next step the prepared systems were evaluated for their capacity to adsorb pharmaceutical contaminants. Diclofenac sodium (DCF) was utilized as the model drug, and the three fabricated bio-adsorbents all demonstrated effective DCF adsorption performance, with the adsorption efficiency varying from 65.6 to 100%. Moreover, the DCF adsorption kinetics, isotherms and thermodynamic study were also investigated to reveal the nature of the adsorption process with the different materials. Finally, chitosan-based microspheres were selected for the reusability study, with the adsorption efficiency above 70% retained after six adsorption-desorption cycles, thus further endowing the promising potential of the fabricated bio-adsorbents for commercial applications.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2019. s. 48
Serie
TRITA-CBH-FOU ; 2019:21
Nyckelord
Chitosan, cellulose, nanographene oxide, carbon spheres, hydrogel, microsphere, adsorbent, pharmaceutical, microwave, spray-drying
Nationell ämneskategori
Naturresursteknik Nanoteknik Textil-, gummi- och polymermaterial Fysikalisk kemi Polymerkemi
Forskningsämne
Fiber- och polymervetenskap
Identifikatorer
urn:nbn:se:kth:diva-248454 (URN)978-91-7873-167-1 (ISBN)
Disputation
2019-05-23, F3, Lindstedtsvägen 26, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20190411

Tillgänglig från: 2019-04-11 Skapad: 2019-04-09 Senast uppdaterad: 2019-05-27Bibliografiskt granskad

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Feng, ZhaoxuanOdelius, KarinRajarao, Gunaratna KuttuvaHakkarainen, Minna

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