Comparison of the adsorption capacity of organic compounds present in produced water with commercially obtained walnut shell and residual biomass

Gallo-Córdova, Álvaro; Silva-Gordillo, María del Mar; Muñoz, Gustavo A.; Arboleda-Faini, Xavier; Streitwieser, Daniela Almeida

doi:10.1016/j.jece.2017.07.052

Cited by 44 publications

(15 citation statements)

References 14 publications

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“…After filtering through the column (C o = 10 mg/L, L = 1 cm, Q = 1 mL/min) 50 mL of the waste water, the benzene content in the filtrate was 40% of C o. Zeinali et al [49], using granulated activated carbon, in most cases removed no more than 60% of toluene from the water. Walnut and coconut shell beds removed less than 50% of hydrocarbons from the produced water as reported Gallo-Cordova et al [27]. As reported in this work, modified sawdust-based fixed beds show a reasonable removal efficiency.…”

Section: Breakthrough Curves-modeling and Determination Of Model Parasupporting

confidence: 84%

Separation of BTX Fraction from Reservoir Brines by Sorption onto Hydrophobized Biomass in a Fixed-Bed-Column System

et al. 2020

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Oily brine from the gas and oil industries remains the most difficult wastewater to treat due to its complex chemical composition, which includes aromatic hydrocarbons. Even at low concentrations, the presence of BTX (benzene, toluene, xylenes) can be extremely harmful to aquatic ecosystems. Fixed-bed adsorption columns are recommended for oily water treatment due to their flexibility and easy operation. In this research, pine sawdust modified with polydimethysiloxane (PDMS) and hydrophobic nanosilica was applied as a sorbent in a filtration system. The surface modification of raw fiber allowed to change its morphology and increase the roughness of it. The Yoon-Nelson, Bohart-Adams, Clark, and Belter models were applied to simulate continuous biosorption. The Bohart-Adams model strongly correlated with the experimental data and described the whole dynamic behavior of the column. The effect of feed flow rate (10-50 mL/min) on breakthrough characteristics was determined. Both the breakthrough and saturation time decreased as the flow rate increased. This study indicated that hydrophobized pine sawdust is an effective low-cost potential biosorbent for the removal of BTX fraction from produced water in continuous column mode.

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Section: Breakthrough Curves-modeling and Determination Of Model Parasupporting

confidence: 84%

Separation of BTX Fraction from Reservoir Brines by Sorption onto Hydrophobized Biomass in a Fixed-Bed-Column System

et al. 2020

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“…Ying He and his co-workers [37] reported the co-existence of monolayer and multilayer adsorption during the study of COD removal from leachate containing about 27 different pollutants using activated carbon as adsorbent. The values of the Freundlich constant (n) for boehmite and activated carbon are higher than 1 and less than 10 which indicate that the adsorption process is favorable in both cases [40][41][42][43].…”

Section: Adsorption Isotherm Studymentioning

confidence: 97%

Boehmite nanopowder recovered from aluminum cans waste as a potential adsorbent for the treatment of oilfield produced water

et al. 2021

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In the present study, high surface area boehmite nanopowder was recovered from aluminum cans waste. The sodium aluminate solution was first prepared by dissolving aluminum cans in NaOH solution and then, H2O2 solution was added to precipitate boehmite. The prepared boehmite was characterized by means of X-ray diffraction (XRD), transmission electron microscopy (TEM) and N2 adsorption–desorption techniques. The thermal stability of the boehmite sample was investigated using thermogravimetry (TG) and differential scanning calorimetry (DSC) techniques. The feasibility of using the prepared boehmite powder as a new low-cost adsorbent for the treatment of oilfield produced water was investigated. For comparison, commercial activated carbon was used for the treatment of the produced water under the same conditions. The efficiency of both of boehmite and activated carbon in the treatment of produced water was determined by monitoring the values of a number of pollution indicators [i.e. turbidity, sulfides, sulfates, total organic carbon (TOC), total petroleum hydrocarbon (TPH), and chemical oxygen demand (COD)] before and after the treatment. The boehmite powder showed very good efficiency in the treatment of the produced water, which is very close to that of commercial activated carbon under the same conditions. The effect of adsorbent dose, treatment time, and pH of the media on the adsorption efficiency of both of boehmite and activated carbon was examined at room temperature using chemical oxygen demand as a pollution indicator. The maximum capacity for COD reduction was 69.6% for boehmite and 83.5% for activated carbon at 40 g/l adsorbent dosage, pH7, and 24-h contact time. Graphic abstract

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“…where q e is the adsorption capacity equilibrium, in mg Cr /g; C 0 is the initial Cr(VI) concentration, in mg/L; C e is the equilibrium concentration, in mg/L; m is the dry weight of adsorbent, in g; and V is the volume of Cr(VI) solution, in L. The percentage of removal was obtained by Equation (5) [27]:…”

Section: Sorption Experimentationmentioning

confidence: 99%

Effect of the Surface Charge on the Adsorption Capacity of Chromium(VI) of Iron Oxide Magnetic Nanoparticles Prepared by Microwave-Assisted Synthesis

Gallo-Córdova

Morales

Mazarío

2019

Water

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Solid phase extraction using magnetic nanoparticles has represented a leap forward in terms of the improvement of water quality, preventing the contamination of industrial effluents from discharge in a more efficient and affordable way. In the present work, superparamagnetic iron oxide nanoparticles (MNP) with different surface charges are tested as nanosorbents for the removal of chromium(VI) in aqueous solution. Uniform magnetic nanoparticles (~12 nm) were synthesized by a microwave polyol-mediated method, and tetraethyl orthosilicate (TEOS) and (3-aminopropyl) triethoxysilane (APTES) were grafted onto their surface, providing a variation in the surface charge. The adsorptive process of chromium was evaluated as a function of the pH, the initial concentration of chromium and contact time. Kinetic studies were best described by a pseudo-second order model in all cases. TEOS@MNP barely removed the chromium from the media, while non-grafted particles and APTES@TEOS@MNP followed the Langmuir model, with maximum adsorption capacities of 15 and 35 mgCr/g, respectively. The chromium adsorption capacities abruptly increased when the surface became positively charged as the species coexisting at the experimental pH are negatively charged. Furthermore, these particles have proven to be highly efficient in water remediation due their 100% reusability after more than six consecutive adsorption/desorption cycles.

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Comparison of the adsorption capacity of organic compounds present in produced water with commercially obtained walnut shell and residual biomass

Cited by 44 publications

References 14 publications

Separation of BTX Fraction from Reservoir Brines by Sorption onto Hydrophobized Biomass in a Fixed-Bed-Column System

Separation of BTX Fraction from Reservoir Brines by Sorption onto Hydrophobized Biomass in a Fixed-Bed-Column System

Boehmite nanopowder recovered from aluminum cans waste as a potential adsorbent for the treatment of oilfield produced water

Effect of the Surface Charge on the Adsorption Capacity of Chromium(VI) of Iron Oxide Magnetic Nanoparticles Prepared by Microwave-Assisted Synthesis

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