Removal of rhodamine B from aqueous solution by sorption on Turbinaria conoides (Phaeophyta)

Hii, Siew-Ling; Yong, Su-Yee; Wong, Ching-Lee

doi:10.1007/s10811-009-9448-3

Cited by 57 publications

(31 citation statements)

References 25 publications

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“…The multiple non-covalent interactions (like hydrogen bond, hydrophobic interaction, and electrostatic interaction) between GO and RB have varied effects on the release behavior of RB under different pH. [36] RB has a pKa of 4.2, [37] and would be fully deprotonated at pH 7.4, thus the hydrogen bonding between GO and In order to further explore the release mechanism of RB from HA-GO 2 NC hydrogels under different pH, the kinetics curves of cumulative release (lower than 60%) from HA-GO 2 NC hydrogels were fitted using the Origin® 8. The results display the possibility of using this pH sensitive NC hydrogels as an intelligent drug delivery carrier.…”

Section: Release Of Rbmentioning

confidence: 99%

Enzymatically cross-linked hyaluronic acid/graphene oxide nanocomposite hydrogel with pH-responsive release

Song

Xiao

et al. 2015

Journal of Biomaterials Science, Polymer Edition

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Hyaluronic acid (HA) is made up of repeating disaccharide units (β-1,4-d-glucuronic acid and β-1,3-N-acetyl-d-glucosamine) and is a major constituent of the extracellular matrix. HA and its derivatives which possess excellent biocompatibility and physiochemical properties have been studied in drug delivery and tissue engineering applications. Tyramine-based HA hydrogel with good compatibility to cell and tissue has been reported recently. However, inferior mechanical property may limit the biomedical application of the HA hydrogel. In this study, HA/graphene oxide (GO) nanocomposite (NC) hydrogel was prepared through a horseradish peroxidase catalyzed in situ cross-linking process. As compared with pure HA hydrogels, incorporation of GO to the HA matrix could significantly enhance the mechanical properties (storage moduli 1800 Pa) of the hydrogel and prolong the release of rhodamine B (RB) as the model drug from the hydrogel (33 h) as well. In addition, due to the multiple interactions between GO and RB, the NC hydrogels showed excellent pH-responsive release behavior. The release of RB from the NC hydrogel was prolonged at low pH (pH 4.0) in the presence of GO, which could be attributed to the enhanced interactions between GO and HA as well as with RB. In situ three-dimensional encapsulation of mouse embryonic fibroblasts (BALB 3T3 cells) in the NC hydrogels and cytotoxicity results indicated the cytocompatibility of both the enzymatic cross-linking process and HA/GO NC hydrogels (cell viability 90.6 ± 4.25%). The enzymatically catalyzed fabrication of NC hydrogels proved to be an easy and mild approach, and had great potential in the construction of both tissue engineering scaffolds and stimuli-responsive drug release matrices.

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Section: Release Of Rbmentioning

confidence: 99%

Enzymatically cross-linked hyaluronic acid/graphene oxide nanocomposite hydrogel with pH-responsive release

Song

Xiao

et al. 2015

Journal of Biomaterials Science, Polymer Edition

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“…cationic dye at lower pH values and bonds favorably with negatively charged surfaces of oxides through electrostatic interactions (Hii et al, 2009). We utilized zeta (z) potential measurements to estimate the isoelectric point (IEP) of the xerogel adsorbents.…”

Section: Isotherms Parameters Non-linear Linearmentioning

confidence: 99%

“…Extensive literature has been reported regarding dye removal from aqueous solutions by using a myriad of adsorbents derived from clay minerals (Khan et al, 2004), activated carbon (Annadurai et al, 2001;Pelekani and Snoeyink, 2000;Ramuthai et al, 2009), coal (Mohan et al, 2002b), wood (Garg et al, 2003), carbon xerogels (Figueiredo et al, 2011), fly ash (Lin et al, 2008;Mohan et al, 2002a;Shaobin et al, 2005), and bio-materials (Debrassi and Rodrigues, 2011;Hii et al, 2009). However, owing to the lack of effective adsorbateeadsorbent interactions, which can be ascribed either to the relatively limited surface area or clogged "dead volume" in the pores of adsorbents, a number of the above mentioned materials are found to be sluggish for the adsorption of dyes.…”

Section: Introductionmentioning

confidence: 99%

An investigation into the effect of porosities on the adsorption of rhodamine B using titania–silica mixed oxide xerogels

Rasalingam

Peng

Koodali

2013

Journal of Environmental Management

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“…These models are applied to describe the adsorption mechanisms, surface adsorbent characteristics, adsorption affinity, and adsorption experimental data. Consequently, building an excellent correlation between equilibrium diagrams for optimization of conditions and designing adsorption systems is very important [39].…”

Section: Equilibrium Adsorption Isothermmentioning

confidence: 99%

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

Mohammadi

Bazrafshan

Noroozifar

et al. 2017

Journal of Chemistry

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Removal of benzene and toluene, as the major pollutants of water resources, has attracted researchers' attention, given the risk they pose to human health. In the present study, the potential of copper oxide nanoparticles (CuO-NPs) in eliminating benzene and toluene from a mixed aqueous solution was evaluated. For this, we performed batch experiments to investigate the effect of solution pH (3-13), dose of CuO-NPs (0.1-0.8 g), contact time (5-120 min), and concentration of benzene and toluene (10-200 mg/l) on sorption efficiency. The maximum removal was observed at neutral pH. By using the Langmuir model, we measured the highest adsorption capacity to be 100.24 mg/g for benzene and 111.31 mg/g for toluene. Under optimal conditions, adsorption efficiency was 98.7% and 92.5% for benzene and toluene, respectively. The sorption data by CuO-NPs well fitted into the following models: Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich model. The experimental information well fitted in the Freundlich for benzene and Langmuir for toluene. Based on the results, adsorption followed pseudo-second-order kinetics with acceptable coefficients. The findings introduced CuO-NPs as efficient compounds in pollutantsadsorption. In fact, they could be used to develop a simple and efficient pollutant removal method from aqueous solutions.

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Removal of rhodamine B from aqueous solution by sorption on Turbinaria conoides (Phaeophyta)

Cited by 57 publications

References 25 publications

Enzymatically cross-linked hyaluronic acid/graphene oxide nanocomposite hydrogel with pH-responsive release

Enzymatically cross-linked hyaluronic acid/graphene oxide nanocomposite hydrogel with pH-responsive release

An investigation into the effect of porosities on the adsorption of rhodamine B using titania–silica mixed oxide xerogels

Adsorptive Removal of Benzene and Toluene from Aqueous Environments by Cupric Oxide Nanoparticles: Kinetics and Isotherm Studies

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