Remediation of petroleum contaminated saline water using value-added adsorbents derived from waste coconut fibres

Cardoso, Célia Karina Maia; Mattedi, Silvana; Lobato, Ana Katerine de Carvalho Lima; Moreira, Ícaro Thiago Andrade

doi:10.1016/j.chemosphere.2021.130562

Cited by 17 publications

(10 citation statements)

References 60 publications

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“…This feature is crucial for understanding the compositional and structural properties of the seed filler [ 36 , 41 , 42 ]. The peak at 1629 cm −1 is associated with water absorption, likely due to water molecules absorbed in the sample, as cellulose and hemicellulose are known to form intermolecular hydrogen bonds with water [ 41 , 43 , 44 ]. Meanwhile, the peak at 1465 cm −1 is attributed to CH 3 deformation asymmetry in lignin and CH 2 bending, pointing towards the presence of lignin and xylan [ 36 , 38 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

Characterization of Syzygium cumini (L.) Skeels (Jamun Seed) Particulate Fillers for Their Potential Use in Polymer Composites

Thiagamani,

Yaswanth,

Yashwanth

et al. 2024

Molecules

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Syzgium cumini (L.) Skeels powder (S. cumini powder), also known as Jamun, is well-known for its various medical and health benefits. It is especially recognized for its antidiabetic and antioxidant properties. Thus, S. cumini powder is used in various industries, such as the food and cosmetic industries. In this work, the fruit of S. cumini was utilized; its seeds were extracted, dried, and ground into powder. The ground powders were subjected to various techniques such as physicochemical tests, Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD), particle size analysis, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and antioxidant analysis. From the physicochemical tests, it was revealed that the jamun seed filler contained cellulose (43.28%), hemicellulose (19.88%), lignin (23.28%), pectin (12.58%), and wax (0.98%). The FTIR analysis supported these results. For instance, a peak at 2889 cm−1 was observed and associated with CH stretching, typically found in methyl and methylene groups, characteristic of cellulose and hemicellulose structures. The XRD results demonstrated that the crystallinity index of the jamun seed filler was 42.63%. The particle analysis indicated that the mean (average) particle size was 25.34 μm. This observation was ensured with SEM results. The EDX spectrum results showed the elemental composition of the fillers. Regarding thermal degradation, the jamun seed filler had the ability to withstand temperatures of up to 316.5 °C. Furthermore, endothermic and exothermic peaks were observed at 305 °C and 400 °C, respectively. Furthermore, the antioxidant property of the powder displayed a peak scavenging activity of 91.4%. This comprehensive study not only underscores the viability of S. cumini powder as a sustainable and effective particulate filler in polymer composites but also demonstrates its potential to enhance the mechanical properties of composites, thereby offering significant implications for the development of eco-friendly materials in various industrial applications.

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Section: Resultsmentioning

confidence: 99%

Characterization of Syzygium cumini (L.) Skeels (Jamun Seed) Particulate Fillers for Their Potential Use in Polymer Composites

Thiagamani,

Yaswanth,

Yashwanth

et al. 2024

Molecules

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“…About 40% of 4-CBA adsorption occurs within 30 min. The initial high removal rate indicates surface-bound sorption, and after some time, the low removal rate can be attributed to the remote diffusion of the adsorbate into the internal pores of the adsorbent (Cardoso et al 2021). After a sufficient time, the 4-CBA concentration in the aqueous phase and on the adsorbent surface comes into equilibrium, and adsorption can no longer be observed.…”

Section: Effect Of C O and T On 4-cba Removal And Adsorption Capacitymentioning

confidence: 99%

Synthesis of bio-based materials from agricultural residues for treatment of petrochemical wastewater

Ibrahim

Kumar

Srivastava

et al. 2023

Clean Techn Environ Policy

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4-Carboxybenzaldehyde (4-CBA), a major component of purified terephthalic acid wastewater, is toxic to living organisms and required to be removed before the discharge of treated wastewater in a natural water body. In this work, the adsorptive removal of 4-CBA was studied using bagasse fly ash (BFA), a waste product from the sugar industry. The adsorption capacity of BFA was compared with the commercially available adsorbent, granular activated carbon (GAC). A 4-factorial, 5-stage central composite design (CCD) was used to optimize 4-CBA removal and adsorption uptake by BFA using response surface methodology (RSM). The variables considered for the study were pH, adsorbent dose (m), initial concentration (Co) and time (t). At the optimum treatment conditions of pH = 4, m = 9 g/L, Co = 100 mg/L and t = 7.5 h, the removal efficiency and adsorption uptake of 4-CBA on BFA were found to be 79% and 9.9 mg/g, respectively. BET surface area of BFA was determined to be 284 m2/g. A kinetic study was performed using a first- and second pseudo-order model. The adsorption equilibrium data were fitted for various adsorption models. A positive value $$\Delta H^{0}$$ Δ H 0 indicates that the adsorption process is endothermic. This study indicated that BFA is a cost-effective adsorbent for the removal of 4-CBA with high adsorption capacity and fast kinetics. Graphical Abstract

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“…The intertwining of cellulose and lignin units occurs through hemicellulose chains, resulting in a complex matrix. The presence of lignin imparts oleophilic characteristics to the fibers, whereas cellulose and hemicellulose contribute hydrophilic properties to their structures [50,51].…”

Section: Lignocellulosic Characterization Of Cf and Htcfmentioning

confidence: 99%

Assessment of Hydrothermal Treatment Effects on Coir Fibers for Incorporation into Polyurethane Matrix Biocomposites Derived from Castor Oil

Camillo,

Gonçalves,

Candido

et al. 2023

Polymers

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The incorporation of natural lignocellulosic fibers as reinforcements in polymer composites has witnessed significant growth due to their biodegradability, cost-effectiveness, and mechanical properties. This study aims to evaluate castor-oil-based polyurethane (COPU), incorporating different contents of coconut coir fibers, 5, 10, and 15 wt%. The investigation includes analysis of the physical, mechanical, and microstructural properties of these composites. Additionally, this study evaluates the influence of hydrothermal treatment on the fibers, conducted at 120 °C and 98 kPa for 30 min, on the biocomposites’ properties. Both coir fibers (CFs) and hydrothermal-treated coir fibers (HTCFs) were subjected to comprehensive characterization, including lignocellulosic composition analysis, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The biocomposites were subjected to water absorption analysis, bending tests, XRD, SEM, FTIR, and TGA. The results indicate that the 30 min hydrothermal treatment reduces the extractive content, enhancing the interfacial adhesion between the fiber and the matrix, as evidenced by SEM. Notably, the composite containing 5 wt% CF exhibits a reduced water absorption, approaching the level observed in pure COPU. The inclusion of 15 wt% HTCF results in a remarkable improvement in the composite’s flexural strength (100%), elastic modulus (98%), and toughness (280%) compared to neat COPU. TGA highlights that incorporating CFs into the COPU matrix enhances the material’s thermal stability, allowing it to withstand temperatures of up to 500 °C. These findings underscore the potential of CFs as a ductile, lightweight, and cost-effective reinforcement in COPU matrix biocomposites, particularly for engineering applications.

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Remediation of petroleum contaminated saline water using value-added adsorbents derived from waste coconut fibres

Cited by 17 publications

References 60 publications

Characterization of Syzygium cumini (L.) Skeels (Jamun Seed) Particulate Fillers for Their Potential Use in Polymer Composites

Characterization of Syzygium cumini (L.) Skeels (Jamun Seed) Particulate Fillers for Their Potential Use in Polymer Composites

Synthesis of bio-based materials from agricultural residues for treatment of petrochemical wastewater

Assessment of Hydrothermal Treatment Effects on Coir Fibers for Incorporation into Polyurethane Matrix Biocomposites Derived from Castor Oil

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