Bisphenol A Removal by Adsorption Using Waste Biomass: Isotherm and Kinetic Studies (original) (raw)
Related papers
Journal of the Cameroon Academy of Sciences
La pollution de l’environnement demeure l’un des problèmes majeurs découlant du développement technologique. Le rejet d’eaux usées contenant ce polluant dans l’environnement sans traitement préalable a de graves conséquences pour les êtres vivants. L’objectif de cette étude était d’utiliser des coquilles d’arachides pour éliminer le BPA dans les eaux usées, où, les spectres infrarouges et les diffractogrammes des matériaux ; et autre méthodes ont été spécifiquement étudiées. Dans cette étude, le plan composite central a été utilisé pour optimiser les facteurs qui affectent l’adsorption du BPA de la solution. Ces facteurs comprennent la concentration initiale, la le pH de la solution, le temps de contact, et la masse de carbone sur la réponse qui est l’adsorbé quantité de BPA. Les valeurs respectives de pH et de pHpzc sont de 5,99 et 6,34 pour les PAB; 6.24 et 7.35 pour les PAN et 6,38 et 6,58 pour les PAU. Des études cinétiques ont trouvé l’Elovich et le pseudo-second les modèles ci...
IOP Conference Series: Materials Science and Engineering, 2019
Bisphenol A (BPA) has been widely used in plastic industries. The chemical waste from industry is sometimes dumped into rivers and lakes then these surface waters can become polluted. Therefore, this study aims to investigate the adsorption process of BPA by banana fronds (Musa acuminata), an agricultural waste material. Batch experiment was performed by varying different operational parameters including contact time, concentration of BPA, concentration of adsorbents, agitation, and pH. The results confirmed 63.83 % as the highest removal efficiency at 3-hour contact time, 9 mg/L of adsorbent concentration, 40 mg/l of BPA initial concentration, pH of 5, and agitation speed at 150 rpm. In explaining the sorption potential of adsorbents, Langmuir isotherm was better fit with the experimental isotherm data (R² = 0.9876) compared to other employed isotherm models. In addition, the pseudo-firstorder outperformed (R² = 0.8493) in the kinetic behaviors compared to other employed kinetic models. The analysis by the Field Emission Scanning Electron Microscopy (FESEM) exhibited the specific area of the adsorbent identified as homogeneous surface. Fourier Transform Infrared Spectroscopy (FTIR) analysis confirmed the surface functional groups of the adsorbent before and after BPA removal. The present study indicated that the activated carbon is an alternative of low-cost product as an adsorbent in BPA removal.
Water, Air, & Soil Pollution, 2014
The potential of the activated carbon prepared from the empty fruit bunch of oil palm wastes to remove bisphenol A (BPA) from aqueous media was investigated. The experiments were performed by varying the contact time, activated carbon dose, initial BPA concentration, and pH of the solution. The Langmuir, Freundlich, and Temkin isotherm models were employed to discuss the adsorption behavior. The equilibrium data were perfectly represented by the Langmuir isotherm with R 2 of 0.9985. The maximum monolayer adsorption capacity of the activated carbon was found to be 41.98 mg/g. Kinetic studies indicated that the adsorption process followed the pseudo-second-order kinetic with a rate constant of 0.3×10 −3 /min. The activated carbon was characterized by means of Fourier transform infrared spectrometry, Brunauer-Emmett-Teller, and field emission scanning electron microscopy analyses. The results of the present study indicate that the activated carbon prepared from the empty fruit bunch is a promising candidate as a low-cost bio-adsorbent for the removal of BPA from aqueous solution.
Removal of bisphenol A by adsorption on organically modified clays from Burkina Faso
Bioremediation Journal, 2020
Four cationic surfactants with various length and number of long alkyl chains such as dodecyltrimethylammonium, tetradecyltrimethyl-ammonium, hexadecyltrimethylammonium and didodecyldimethyl-ammonium were intercalated at different concentrations into two natural clays from Burkina Faso via solid-state reaction. Each organoclay was used to explore bisphenol A (BPA) removal from water. Various factors including adsorbent dose, agitation time, concentration, surfactant loading levels, pH and temperature were evaluated. Further, pseudo-first and pseudo-second kinetics, Langmuir and Freundlich isotherms and thermodynamics of adsorption onto organoclays were investigated. The adsorption mechanism was perfectly described by pseudo-second-order kinetic model and Langmuir isotherm. Spontaneous and exothermic processes were associated with BPA removal. This study showed that both physisorption and chemisorption are involved in BPA adsorption. Adsorption capacities ranging from 88 to 127 mg/g were observed at ambient temperature and acidic environment. The ranking of organoclays sorption capacities depends on the surfactant loading level. The pH effect on the adsorption showed a remarkable decrease in the quantity of BPA removed when pH ! 10. The BPA amount adsorbed onto the organoclays was not varying significantly for pH < 10. Organoclays prepared via solid-state surfactant intercalation are as effective adsorbents for BPA removal from water as those prepared in aqueous solution through cation exchange.
Utilization of Durian Peel as Potential Adsorbent for Bisphenol a Removal in Aquoeus Solution
Jurnal Teknologi, 2015
This study explored the low-cost adsorbent of durian peel for BPA removal from aqueous solutions. The effect of various operational parameters such as contact time, temperature, concentration, agitation and pH on the adsorption of BPA was investigated using the batch adsorption study. It was found that Durian peel can be used as a low cost adsorbent for the removal of BPA in aqueous solution after treated with sulfuric acid. The effects of morphology, functional groups, and surface area of adsorbent, before and after pretreatment with sulfuric acid and reaction were investigated by using FESEM, FTIR, and BET. The present study indicates that durian peel had removed 69.63% of BPA with adsorption capacity of 4.178 mg/g for 24 hours. The result proved that this treated agricultural waste was promising material as an alternative adsorbent for the removal of BPA from aqueous solution. Kinetic study of the results gave a pseudo-second order type of mechanism while the adsorption character...
E3S Web of Conferences
Emerging organic micropollutants, such as bisphenol A (BPA), have raised concerns about their negative impact on human health and ecological safety. This review article aims to demonstrate and highlight recent advances in adsorption applications for bisphenol A, a toxic environmental pollutant commonly found in wastewater. There are many reasons to use non-toxic materials and eco-friendly technologies to remove this pollutant from sewage. [1] Several adsorbents previously used have shown significant efficiency and performance for the removal of BPAs, and current research is directed towards the development of low-cost treatment processes using materials such as clays and Chitosan. The properties of the adsorbent can be adjusted by changing their surface for an optimized performance. In addition, the efficiency of the adsorption process depends on various parameters such as solution pH, the pollutant concentration, contact time, temperature, nature and dose of the adsorbent, which ar...
Journal of the Brazilian Chemical Society, 2021
The presence of plastic waste in water bodies has led to a growing concern due to the impact on human health. Among the most important plastic additive molecules is bisphenol-A (BPA). On the other hand, micro-pollutant removal processes that make use of agro-industrial waste have aroused the interest of researchers. This is because the accumulation of lignocellulosic materials is also an environmental problem. The objective of this work is to use corncob agro-industrial residue (CC) as an adsorbent in the removal of BPA in aqueous matrix. The adsorption studies were carried out in reaction media containing the ground vegetable fiber and BPA solution in concentrations of 10, 25 and 50 mg L, as well as at pHs 3, 5, 7 and 9. Isotherms models and kinetic models were evaluated. The results showed that CC is a potent BPA adsorbent in aqueous solution, leading to about 90% of removal. The adsorption kinetics followed the pseudo-second order model and isotherm that best suited was the Lagmu...
DESALINATION AND WATER TREATMENT, 2019
Milk-vetch (MV) and compact discs (CDs) wastes, as natural and synthetic carbonaceous precursors, were used to produce low-cost activated carbons. The efficiency of adsorption of these adsorbents was compared with commercial activated carbon (CAC) for the adsorption of bisphenol A (BPA) from aqueous solutions. The activated carbon prepared from MV (MVAC) had a higher adsorption capacity, 33.19 mg g-1 , than that of both CD wastes (CDAC), 12.15 mg g-1 , and CAC, 29.22 mg g-1. These adsorbents were characterized using X-ray diffraction, scanning electron microscope, Brunauer-Emmett-Teller method, pH zpc and Fourier transform-infrared spectra techniques. The effect of operating parameters on the adsorption of BPA such as the pH, contact time, adsorbent dosages, initial BPA concentrations, temperature, and ionic strength were studied. The optimal removal of the BPA was achieved at neutral pH (pH 7) by three adsorbents. Equilibrium contact times of 90 min were achieved for all the investigated activated carbons. Based on the obtained results, the pseudo-second-order kinetic model and Langmuir isotherm fitted the experimental finding better than other isotherms and kinetics. Furthermore, thermodynamic parameters were calculated and ΔG, ΔH and ΔS indicate that the reaction is spontaneous and endothermic, and physisorption mechanism was the dominant mechanism in terms of adsorption of BPA onto the three adsorbents.
Use of Bamboo Powder Waste for Removal of Bisphenol A in Aqueous Solution
Water, Air, & Soil Pollution, 2015
The scarcity of clean water affecting many parts of the world encourages efforts to improve water reclamation processes, which rely on their capability to remove diverse types of water pollutants and contaminants. Thus this study reports the application of bamboo fiber powders as potential low-cost sorbent for removal of noxious organic compounds in aqueous solution. Bisphenol A, a bio-refractory endocrine disruptor compound, was chosen as model compound in order to easily follow the separation process. Principal component analysis of the FTIR spectra and BET surface area measurements were performed on treated bamboo fiber powders. Treatment of the raw powders with alkali, ionic and non-ionic surfactants appeared to improve the bisphenol A removal performance of the bamboo fiber powders with the best removal efficiency reached at 39 % for a sorbent dosage of 4 g.L-1 gained after a bamboo treatment using the cationic surfactant. Effects of contact time, sorbent dosage and particle sizes (55µm, 300 µm and 1000 µm) of cationic surfactant treated bamboo fiber powders towards removal of bisphenol A were further assessed in a batch system with an optimum removal observed for 55 µm particle size.
Environmental technology, 2018
Biomass-based carbon was modified and used as an efficient bisphenol A (BPA) sorbent. The simple and environmentally friendly modification method produced sorbent with a capacity of 41.5 mg/g. The raw material was modified with FeCl (Fe-CR), treated with hydrochloric acid (H-CR) or modified with CaCl (Ca-CR). Batch sorption experiments were performed to evaluate the effects of the initial pH, sorbent dosage, temperature, and contact time on BPA removal. BPA removal with modified carbons was notably higher than that with unmodified carbon. All sorbent materials exhibited very high sorption capacities and compared favourably to materials reported in the literature. Several isotherms were applied to describe the experimental results of Fe-CR, H-CR, and Ca-CR modified carbon residues and the Sips model showed the best fit for all sorbents. Kinetic studies for the best sorbent material (Fe-CR) showed that the sorption process follows Elovich kinetics. Desorption cycles were implemented, ...