Removal of organic pollutants from water by modified cellulose fibres

Alila, Sabrine; Boufi, Sami

doi:10.1016/j.indcrop.2009.02.005

Cited by 75 publications

(36 citation statements)

References 31 publications

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“…The modification of oxidized CNC surfaces with C16 surfactants produced the co-adsorption of 2-naphthol (Alila et al 2005). The grafting of cellulose fibres with different amino derivatives resulted in an improvement of up to 800 % in the adsorptive capacity of aromatic organic compounds (Alila and Boufi 2009), and grafting polystyrene onto CNC enhanced the adsorption of 1,2,4-trichlorobenzene from water by 20 % (Morandi et al 2009). An interesting study was published by Korhonen et al (2011) who developed a hydrophobic, floating nanocellulose aerogel for the purification of water by oil adsorption.…”

Section: Introductionmentioning

confidence: 99%

Cellulose nanocrystal surface functionalization for the controlled sorption of water and organic vapours

et al. 2016

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The surface grafting of cellulose nanocrystals (CNC) is a valuable tool to increase opportunities for their application. This work had several goals designed to improve CNC: reduction of hornification, increased re-dispersibility after CNC drying, and tuning of the surface graft to enhance the adsorption of particular molecules. To achieve this, the CNC surfaces were modified chemically with aromatic surface grafts using widely employed methods: the creation of urethane linkages, silylation and esterification. Even a low degree of grafting sufficed to increase water contact angles to as much as 96°. The analysis of water sorption isotherms showed that at high water activities, capillary condensation could be suppressed and hysteresis was decreased. This indicates that hornification was significantly suppressed. However, although the contact angles increased, the water sorption isotherms were changed only slightly because of reduced hysteresis. The grafts were not able to shield the surface from water vapour sorption. A comparison of the sorption isotherms of anisole and cyclohexane, sorbates with a similar surface area, showed that the sorption of anisole was three times higher than that of cyclohexane. The specific sorption of aromatic molecules was achieved and the most efficient methodology was the esterification of CNC with carboxylic acids containing a flexible linker between the aromatic moiety and ester bond.

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Section: Introductionmentioning

confidence: 99%

Cellulose nanocrystal surface functionalization for the controlled sorption of water and organic vapours

et al. 2016

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“…During the last years, many research teams have had an interest in cellulose compounds for waste treatment, because they are quite easily available and renewable. Cellulose is the most abundant polymer on earth (Satge et al 2002, Chauvelon et al 1998, Gourson et al 1999 and derived substrates are suitable for trapping dyes (Marchetti et al 2000), organic (Maurin et al 1999, Aloulou et al 2006, Alila and Boufi, 2009) and inorganic (Randall et al 1976, Li and Bai 2005, Navarro et al 1999 pollutants. Chemical modification of cellulose (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Nicotinoyl chloride hydrochloride (NCHC) was chosen because the reaction of an acyl halogenide on an alcohol function is the most frequently quantitative (formation of the ester favored) and quite fast. Moreover, the grafting of nitrogenous functions is well documented due to the fact that these functions both confer properties for ions exchange and greatly modify the affinity of cellulose towards organic or inorganic pollutants (Alila andBoufi 2009, Zghida et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Chemical modification of cellulose by acylation: Application to adsorption of methylene blue

Bouhdadi

Benhadi

Molina

et al. 2011

Maderas, Cienc. tecnol.

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Cellulose was modified under mild conditions in order to increase its capability to trap pollutants. Nicotinoyl chloride hydrochloride (NCHC), with its pyridine ring able to adsorb cations, was grafted on the substrate. This grafting has been monitored by infrared spectroscopy and elemental analysis. We have studied the adsorption of Methylene Blue (MB) onto grafted and unmodified cellulose. It was observed that grafting increases three times the retention capacity of cellulose and the kinetics of adsorption is perfectly represented by a pseudo second order model. The adsorption is well described by a Langmuir-type isotherm showing a homogeneous adsorption phenomenon through the formation of a monolayer. Besides the reaction is spontaneous and exothermic, suggesting the possibility of recycling the substrate by desorbing the dye at elevated temperature.

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“…However, the adsorption capacity and the affinity of these bioadsorbents greatly fluctuate according to their origin. The recourse to a ubiquitous available adsorbent biopolymer with high adsorption properties toward a large variety of organic compounds should contribute to the development of these substrates (Alila and Boufi 2009).…”

Section: Introductionmentioning

confidence: 99%

Use of Moringa oleifera Seed as a Natural Adsorbent for Wastewater Treatment

Vieira

Silva

Aráujo

et al. 2009

Water Air Soil Pollut

106

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Moringa oleifera (MO) is a multipurpose, medium-or small-sized tree, from regions of northwest India and indigenous to many parts of Asia, Africa, and South America. Its pods have been employed as an inexpensive and effective sorbent for the removal of organics, and coagulant for water treatment. It is a non-toxic natural organic polymer. The main objective of this work was to use the MO seeds as a natural adsorbent for the treatment of dairy industry wastewater (DIW). The effects of agitation time, pH, MO biomass dose, and DIW concentration were evaluated. Removal efficiencies of up to 98%, for both color and turbidity, were reached using 0.2 g MO and 0.2 L of 1.0 g/L sorbate solution (DIW). The obtained results showed that MO seed keeps its adsorption power under a pH range between 5 and 8. The adsorption data was fitted to Langmuir isotherm. There was a significant uptake capacity of MO biomass, q max , which suggested a good affinity between DIW components and sorbent. We conclude that the MO biomass has the potential to be used in the dairy industry wastewater treatment in an efficient way and with low cost.

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Removal of organic pollutants from water by modified cellulose fibres

Cited by 75 publications

References 31 publications

Cellulose nanocrystal surface functionalization for the controlled sorption of water and organic vapours

Cellulose nanocrystal surface functionalization for the controlled sorption of water and organic vapours

Chemical modification of cellulose by acylation: Application to adsorption of methylene blue

Use of Moringa oleifera Seed as a Natural Adsorbent for Wastewater Treatment

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