Kinetic studies of surface modification of lignocellulosic Delonix regia pods as sorbent for crude oil spill in water

Onwuka, Jude Chinedu; Agbaji, E. B.; Ajibola, V.O.; Okibe, Friday Godwin

doi:10.1016/j.jart.2016.09.004

Cited by 22 publications

(21 citation statements)

References 12 publications

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“…This could be as result of the removal of surface wax, namely lignin and hemicellulose from the sorbent, by the treatment with acetic anhydride (Johar et al 2012). This was similarly reported by other researchers (Chung et al 2011;Wang et al 2012;Onwuka et al 2016). Figures 1c and 2c show that the pores which can store crude oil were covered completely in OPEFB and partially in CP.…”

Section: Fourier Transform Infrared (Ftir) Analysissupporting

confidence: 81%

“…Method described by Sun et al (2004) and Onwuka et al (2016) was adopted in acetylating these materials, although little modification was included. A portion (2 g) of sorbent was placed in a 250-mL conical flask containing 60 mL of acetic anhydride and 0.6 g (1% of the solvent) N-bromosuccinimide (NBS).…”

Section: Acetylation Of the Agro-wastementioning

confidence: 99%

“…Acetylation has received considerable attention more than any other chemical modification technique known (Rowell et al 1994). Hydrophobic treatment of lignocellulosic materials like cotton (Adebajo and Frost 2004), rice straws (Sun et al 2002), kenaf and jute (Rowell and Stout 1998;Rowell et al 2002), rice husk (Thompson et al 2010), corn cobs (Nwadiogbu et al 2014), Delonix regia pods (Onwuka et al 2016) by acetylation reaction has been reported to show very high capacity to sorb oil from spill sites. Agricultural waste sorbents such as empty fruit oil palm bunch (Elaeis guineensis) and cocoa pods are abundantly available in different parts of Nigeria, and no studies have been done yet on their modification under mild condition and their ability to sorb oil.…”

Section: Introductionmentioning

confidence: 99%

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Treatment of crude oil-contaminated water with chemically modified natural fiber

et al. 2018

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The dependence of Nigerian Government on foreign technology for oil spill cleanup in its water bodies does not add local content value in the development of the Nation's economy. Acetylation of natural cellulose gives a material with high sorption capacity for oil in water. This research investigates crude oil sorption from water using acetylated and unacetylated lignocellulose. Oil palm empty fruit bunch (OPEFB) and cocoa pod (CP) were acetylated under mild conditions. The acetylated (modified) and unacetylated (unmodified) sorbents were used to sorb oil from water, and their sorption capacities and mechanisms were compared. Paired t test showed there was significant difference in the sorption capacities of modified and unmodified sorbents. Sorption of oil from water was found to be time and concentration dependent. Equilibrium studies showed that CP has higher sorption capacity than OPEFB and acetylation enhanced the crude sorption capacities of the sorbents. Crude oil sorption from water is a monolayer process that might have progressed from multilayer processes. Kinetic studies showed that sorption of crude oil by the sorbents was diffusion-controlled with the aid of physisorption and chemisorption mechanisms. Fourier transform infrared and scanning electron microscope analyses showed clear evidence of successful acetylation and oil sorption.

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Section: Fourier Transform Infrared (Ftir) Analysissupporting

confidence: 81%

Section: Acetylation Of the Agro-wastementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Treatment of crude oil-contaminated water with chemically modified natural fiber

et al. 2018

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“…e maximum value for adsorption was reached at 45 min with 13.203 g/g of the adsorption capacity. is effect might be due to adsorption of palm oil on the surface of the sorbent which then starts to break through the inside microscopic voids [27]. ere is large amount of available sites that causes a strong hydrophobic interaction between adsorbent and adsorbate.…”

Section: Fourier-transform Infrared (Ftir) Analysesmentioning

confidence: 99%

Biomass Modification Using Cationic Surfactant Cetyltrimethylammonium Bromide (CTAB) to Remove Palm-Based Cooking Oil

Pauzan

Ahad

2018

Journal of Chemistry

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Adsorption based on natural fibre seems to widely used for oily wastewater recovery due to its low cost, simplicity, feasibility, easy handling, and effectiveness. However, oil sorbent based on natural fibre without modification has low adsorption capacity and selectivity. Thus, this paper proposes chemical modification of sago hampas to improve its adsorbent efficiency for the removal of palm-based cooking oil. The chemical modification was performed using a cationic surfactant, cetyltrimethylammonium bromide (CTAB). The chemical and surface properties of both unmodified and modified sago hampas were characterized by Fourier-Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). Parameters studied for the removal of cooking oil using modified sago hampas were sorption time, adsorbent dosage, and initial pH. The removal capacity was also compared using unmodified sago hampas. The results showed that additional functional groups were introduced on the surface of modified sago hampas. Modified sago hampas also showed a greater porosity than unmodified sago hampas. These properties enhanced the adsorption of palm-based cooking oil onto the surface of modified sago hampas. Modified sago hampas shows better removal of palm-based cooking oil than unmodified sago hampas, where 84.82% and 68.08% removal were achieved by modified and unmodified sago hampas, respectively. The optimum adsorption of palm-based cooking oil was identified at 45 min sorption time, pH 2, and 0.2 g adsorbent dosage.

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“…The following peak intensities 3994, 3909, 3749 and 3407 cm -1 as reflected on the IR spectra of acetic anhydride treated samples are characteristic absorption of bonded -OH group stretching vibrations in cellulose and hemicelluloses. The intensities increased which is a good evidence of acetylation [13,31,32]. Before acetylation, absorption peak was seen at 1649cm -1 but this signal shifted to 1643cm -1 and suggests the presence of hemicellulose [2].…”

Section: Results and Discussion 31 Scanning Electron Microscope (Semmentioning

confidence: 96%

Kinetics and Equilibrium of Crude Oil Sorption from Aqueous Solution Using Borassus Aeothopum Coir

2019

CMR

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In this study, Borassus aethopum coir (BAC) which is an abundant, cheap, readily available and biodegradable agricultural waste was modified by acetylation using acetic anhydride and NBS catalyst at room temperature. This was to increase their hydrophobic properties and improve their sorption capacity in aqueous environment. The crude oil sorption kinetic data were fitted by intra-particle diffusion and pseudo-first order for raw BAC but the pseudo-second order kinetic model best fits crude oil sorption data for acetylated BAC. The Langmuir and Freundlich models were used to elucidate the sorption behaviour of crude oil with raw and acetylated BAC. Freundlich isotherm gave the best fit for the equilibrium crude oil sorption data for acetylated BAC and raw BAC. Fourier transform infrared and scanning electron microscope analyses showed clear evidence of successful acetylation. The results presented and discussed in the study suggests that acetylated BAC (ABAC) is more suitable for crude oil sorption than raw BAC, therefore, possesses more potential for application and further development in treatment of oil spillage.

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Kinetic studies of surface modification of lignocellulosic Delonix regia pods as sorbent for crude oil spill in water

Cited by 22 publications

References 12 publications

Treatment of crude oil-contaminated water with chemically modified natural fiber

Treatment of crude oil-contaminated water with chemically modified natural fiber

Biomass Modification Using Cationic Surfactant Cetyltrimethylammonium Bromide (CTAB) to Remove Palm-Based Cooking Oil

Kinetics and Equilibrium of Crude Oil Sorption from Aqueous Solution Using Borassus Aeothopum Coir

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