Natural adsorbent based on sawdust for removing impurities in waste lubricants

Chen, Xiaohui; Xu, Ruting; Xu, Yanting; Hu, Hui; Pan, Shouquan; Pan, Hongkun

doi:10.1016/j.jhazmat.2018.01.057

Cited by 35 publications

(19 citation statements)

References 52 publications

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“…Agricultural waste materials offer potential adsorbents in the removal of heavy metals from wastewater [9] and the use of such free resources, which are widely available and incur low processing costs, offers an alternative to the comparatively costly activated carbon, while retaining the favourable physico-chemical properties often associated with latter adsorbents. Sawdust is a natural resource, mainly consisting of cellulose and lignin that has high adsorption capacity for pollutants [10,11], and has potential for adsorption of key pollutants, such as, heavy metals, oils, dyes and toxic salts from water.…”

Section: Introductionmentioning

confidence: 99%

Non-linear adsorption characteristics of modified pine wood sawdust optimised for adsorption of Cd(II) from aqueous systems

Hashem

Badawy

Farag

et al. 2020

Journal of Environmental Chemical Engineering

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The facile modification of pinewood sawdust, with maleic acid, to produce a sorbent aimed at metal ion adsorption, was tested via the batch adsorption of Cd(II) ions from aqueous solution. The sorbent was characterized for the pH of zero point charge (pHZPC), spectroscopic evaluation of the surface functionalization, structural and morphological features. Factors affecting adsorption behavior, such as adsorbent dose, pH of solution, contact time and Cd(II) ion concentration were investigated. Results obtained show the adsorption rate to be comparatively fast, with equilibrium achieved after 35 min. Subsequent analysis, showed Langmuirian behavior and a monolayer adsorption capacity of 180.4 mg g -1 , at pH 6; while data derived from two-parameter and three-parameter isotherm models was evaluated using non-linear regression methods, with error analysis, to determine the most appropriate model and allow prediction of optimum parameters. The Sips isotherm model proved the most appropriate in describing the experimental data obtained in the study; with a low level of heterogeneity in the adsorption sites occupied suggesting the interaction of the metal ions

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Section: Introductionmentioning

confidence: 99%

Non-linear adsorption characteristics of modified pine wood sawdust optimised for adsorption of Cd(II) from aqueous systems

Hashem

Badawy

Farag

et al. 2020

Journal of Environmental Chemical Engineering

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“…The peak at 1743 cm −1 confirms the functional C=O group present in hemicelluloses [25,26]. The absorption peaks registered at 1624-1548 cm −1 are attributed to the C=C aromatic groups in the lignin [27,28]. The absorption peak at 1446 cm −1 is assigned to the angular deformation of the -CH groups in the cellulose structure [27].…”

Section: Characterization Of Nerium Oleander Fruitmentioning

confidence: 71%

“…The absorption peak at 1446 cm −1 is assigned to the angular deformation of the -CH groups in the cellulose structure [27]. The peak observed at 1320-1327 cm −1 corresponds to the angular deformation of the -CH groups in hemicelluloses [28]. The peak at 1038 cm −1 may be assigned to the C-O symmetric or asymmetric vibration (-C-O-C-ring) of the cellulose.…”

Section: Characterization Of Nerium Oleander Fruitmentioning

confidence: 99%

A Cellulosic Fruit Derived from Nerium oleander Biomaterial: Chemical Characterization and Its Valuable Use in the Biosorption of Methylene Blue in a Batch Mode

et al. 2020

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Cellulose substrate waste has demonstrated great potential as a biosorbent of pollutants from contaminated water. In this study, Neriumoleander fruit, an agricultural waste biomaterial, was used for the biosorption of methylene blue from synthetic solution. Fourier-transform infrared (FTIR) spectroscopy indicated the presence of the main absorption peak characteristics of cellulose, hemicellulose, and lignin compositions. X-ray diffraction (XRD) pattern exhibited peaks at 2θ = 14.9° and 2θ = 22°, which are characteristics of cellulose I. Scanning electron microscopy (SEM) showed a rough and heterogeneous surface intercepted by some cavities. Thermogravimetric analysis (TGA) showed more than a thermal decomposition point, suggesting that Nerium fruit is composed of cellulose and noncellulosic matters. The pHpzc value of Nerium surface was experimentally determined to be 6.2. Nerium dosage, pH, contact time, dye concentration, and temperature significantly affected the adsorption capacity. The adsorption capacity reached 259 mg/g at 19 °C. The mean free energy ranged from 74.53 to 84.52 KJ mol−1, suggesting a chemisorption process. Thermodynamic parameters define a chemical, exothermic, and nonspontaneous mechanism. The above data suggest that Nerium fruit can be used as an excellent biomaterial for practical purification of water without the need to impart chemical functionalization on its surface.

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“…In order to increase both metal sorption capacity and efficiency, the pre-treatment of these agricultural wastes may be needed. For example, chemically modifying these sorbents can increase the sorption capacity, which may be achieved via modification of the backbone of cellulosic materials through functionalisation of the preexisting hydroxyl groups, which has been shown to enhance the sorption capacity of metal ions [1,[10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Carbamoylethylated Wood Pulp as a New Sorbent for Removal of Hg (II) from Contaminated Water: Isotherm and Kinetic Studies

et al. 2020

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Mercury is a persistent, heavy metal present in watercourses, and this paper presents the synthesis of a new, low-cost sorbent, based on wood pulp, for the targeted removal of Hg (II) from aqueous solutions. Carbamoylethylated wood pulp sorbents were obtained from the reaction of wood pulp with acrylamide, in basic media, to produce a suite of materials with varying nitrogen concentration (0.251.51%). Batch sorption techniques were used to determine the sorption capacity of each sorbent for Hg (II), as a function of pH, contact time, as well as sorbate and sorbent concentrations. The samples were evaluated for bulk and surface chemistry (nitrogen concentration and FTIR) as well as surface morphology and textural properties (SEM and surface area measurements). Sorption analysis via Langmuir, Freundlich and Temkin models, showed that the data were best represented by the Temkin isotherm model suggesting influence from surface heterogeneity in the adsorption process. Langmuir analysis provides an indication of the maximum sorption uptake at 787.6 mg g−1, while Freundlich analysis shows the sorption process to be favourable but with some slight suppression at low concentrations. The results indicate the importance of nitrogen concentration and corresponding sorption capacity in Hg (II) sorption kinetics and are consistent with the recovery rates observed. Sorption tests demonstrate that these sorbents have remarkable potential, which is validated through 39% removal of Hg (II) from aqueous solution, and modelling of the kinetic data showed that the system closely flows a pseudo-second-order kinetic model.

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Natural adsorbent based on sawdust for removing impurities in waste lubricants

Cited by 35 publications

References 52 publications

Non-linear adsorption characteristics of modified pine wood sawdust optimised for adsorption of Cd(II) from aqueous systems

Non-linear adsorption characteristics of modified pine wood sawdust optimised for adsorption of Cd(II) from aqueous systems

A Cellulosic Fruit Derived from Nerium oleander Biomaterial: Chemical Characterization and Its Valuable Use in the Biosorption of Methylene Blue in a Batch Mode

Carbamoylethylated Wood Pulp as a New Sorbent for Removal of Hg (II) from Contaminated Water: Isotherm and Kinetic Studies

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