Adsorptive removal of fluoride from aqueous medium using a fixed bed column packed with Zr(IV) loaded dried orange juice residue

2013 ◽  
Vol 146 ◽  
pp. 713-720 ◽  
Author(s):  
Hari Paudyal ◽  
Bimala Pangeni ◽  
Katsutoshi Inoue ◽  
Hidetaka Kawakita ◽  
Keisuke Ohto ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Orange Juice ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Adsorptive Removal

Biochar caged zirconium ferrite nanocomposites for the adsorptive removal of Reactive Blue 19 dye in a batch and column reactors and conditions optimizaton

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shazia Perveen ◽  
Raziya Nadeem ◽  
Shaukat Ali ◽  
Yasir Jamil
Keyword(s):  
Experimental Data ◽  
Low Dose ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Adsorption Efficiency ◽  
Fixed Bed Column ◽  
Flow Rates ◽  
Adsorptive Removal ◽  
Reactive Blue 19 ◽  
Pseudo Second Order

Abstract Biochar caged zirconium ferrite (BC-ZrFe2O5) nanocomposites were fabricated and their adsorption capacity for Reactive Blue 19 (RB19) dye was evaluated in a fixed-bed column and batch sorption mode. The adsorption of dye onto BC-ZrFe2O5 NCs followed pseudo-second-order kinetics (R 2 = 0.998) and among isotherms, the experimental data was best fitted to Sips model as compared to Freundlich and Langmuir isotherms models. The influence of flow-rate (3–5 mL min−1), inlet RB19 dye concentration (20–100 mg L−1) and quantity of BC-ZrFe2O5 NCs (0.5–1.5 g) on fixed-bed sorption was elucidated by Box-Behnken experimental design. The saturation times (C t /C o  = 0.95) and breakthrough (C t /C o  = 0.05) were higher at lower flow-rates and higher dose of BC-ZrFe2O5 NCs. The saturation times decreased, but breakthrough was increased with the initial RB19 dye concentration. The treated volume was higher at low sorbent dose and influent concentration. Fractional bed utilization (FBU) increased with RB19 dye concentration and flow rates at low dose of BC-ZrFe2O5 NCs. Yan model was fitted best to breakthrough curves data as compared to Bohart-Adams and Thomas models. Results revealed that BC-ZrFe2O5 nanocomposite has promising adsorption efficiency and could be used for the adsorption of dyes from textile effluents.

scholarly journals Magnetic Fe3O4@Chitosan Carbon Microbeads: Removal of Doxycycline from Aqueous Solutions through a Fixed Bed via Sequential Adsorption and Heterogeneous Fenton-Like Regeneration

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Bo Bai ◽  
Xiaohui Xu ◽  
Changchuan Li ◽  
Jianyu Xing ◽  
Honglun Wang ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
High Efficiency ◽  
Low Cost ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Chitosan Hydrogel ◽  
Fixed Bed Column ◽  
Adsorptive Removal ◽  
Sequential Adsorption ◽  
Cracking Process

The adsorptive removal of antibiotics from aqueous solutions is recognized as the most suitable approach due to its easy operation, low cost, nontoxic properties, and high efficiency. However, the conventional regeneration of saturated adsorbents is an expensive and time-consuming process in practical wastewater treatment. Herein, a scalable adsorbent of magnetic Fe3O4@chitosan carbon microbeads (MCM) was successfully prepared by embedding Fe3O4 nanoparticles into chitosan hydrogel via an alkali gelation-thermal cracking process. The application of MCM composites for the adsorptive removal of doxycycline (DC) was evaluated using a fixed-bed column. The results showed that pH, initial concentration, flow rate, and bed depth are found to be important factors to control the adsorption capacity of DC. The Thomas and Yoon-Nelson models showed a good agreement with the experimental data and could be applied for the prediction of the fixed-bed column properties and breakthrough curves. More importantly, the saturated fixed bed can be easily recycled by H2O2 which shows excellent reusability for the removal of doxycycline. Thus, the combination of the adsorption advantage of chitosan carbon with catalytic properties of magnetic Fe3O4 nanoparticles might provide a new tool for addressing water treatment challenges.

Adsorptive Removal of Pentachlorophenol by Anthracophyllum discolor in a Fixed-Bed Column Reactor

2011 ◽  
Vol 223 (5) ◽  
pp. 2463-2472 ◽  
Author(s):  
Olga Rubilar ◽  
Gonzalo R. Tortella ◽  
Raphael Cuevas ◽  
Mara Cea ◽  
Susana Rodríguez-Couto ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Column ◽  
Column Reactor ◽  
Adsorptive Removal

Influence of calcination on magnetic honeycomb briquette cinders composite for the adsorptive removal of As(III) in fixed-bed column

2014 ◽  
Vol 257 ◽  
pp. 1-9 ◽  
Author(s):  
Shams Ali Baig ◽  
Jin Zhu ◽  
Lisha Tan ◽  
Xiaoqin Xue ◽  
Chen Sun ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Fixed Bed Column ◽  
Adsorptive Removal

scholarly journals Adsorptive Removal of Trichloroethylene in Water by Crop Residue Biochars Pyrolyzed at Contrasting Temperatures: Continuous Fixed-Bed Experiments

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Ming Zhang ◽  
Mahtab Ahmad ◽  
Mohammad I. Al-Wabel ◽  
Meththika Vithanage ◽  
Anushka Upamali Rajapaksha ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Crop Residue ◽  
Fixed Bed ◽  
Good Alternative ◽  
Column Experiments ◽  
Thomas Model ◽  
Breakthrough Time ◽  
Fixed Bed Column ◽  
Adsorptive Removal ◽  
Adsorption Data

Biochar (BC) has attracted great attention as an alternative sorbent to activated carbon (AC). Objective of this study was to determine trichloroethylene (TCE) removal by soybean stover BC pyrolyzed at 300 (BC300) and 700°C (BC700) in continuous fixed-bed column. Columns packed with BC300, BC700, and AC reached breakthrough time in 1.1, 27.0, and 50.7 h, respectively. BC700 had higher TCE adsorption capacity than BC300 due to its higher surface area, nonpolarity, and aromaticity. The sorption capacities of AC (774.0 mg g−1) and BC700 (515.1 mg g−1) were 21.6 and 14.4 times higher than that of BC300 (35.9 mg g−1). The lower desorption rate of TCE from BC300 than BC700 and AC may be attributed to the strong binding/partition of TCE to the noncarbonized part of BC. Thomas model also adequately described the adsorption data indicating interphase mass transfer. Overall, AC showed best efficiency for removing TCE from water in column experiments. However, although sorption and desorption capabilities of BC700 were a little lower than AC, it is still a good alternative for AC to remove organic contaminants such as TCE from water due to its cost-effectiveness.

Adsorptive Removal of Recalcitrant Auramine-O Dye by Sodium Dodecyl Sulfate Functionalized Magnetite Nanoparticles: Isotherm, Kinetics, and Fixed-Bed Column Studies

2019 ◽  
Vol 19 (01) ◽  
pp. 1950004
Author(s):  
Chandrasekaran Muthukumaran ◽  
Vaiyazhipalayam Murugaiyan Sivakumar ◽  
Sethupathi Sumathi ◽  
Marimuthu Thirumarimurugan
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Removal Efficiency ◽  
Magnetite Nanoparticles ◽  
Dye Removal ◽  
Sodium Dodecyl ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Adsorptive Removal ◽  
Dodecyl Sulfate ◽  
Auramine O

Presently, the treatment of dye-polluted water is a challenging task worldwide. In this study, the adsorptive removal of Auramine-O (AO) dye by magnetite nanoparticles (MNs) and sodium dodecyl sulfate (SDS) functionalized MNs (SFMNs) were investigated. FESEM, HRTEM, EDX, and XRD were employed to characterize the MNs. In batch optimization, dye removal efficiency of 74% was obtained at contact time (40[Formula: see text]min), pH 6.5, sorbent dosage (20[Formula: see text]mg), and initial dye concentration (20[Formula: see text]mg/L). The maximum adsorption capacity of 55.56[Formula: see text]mg/g was estimated from Langmuir model and the isotherm data were fitted with Freundlich model ([Formula: see text]) for SFMNs. Pseudo-second-order kinetics was followed by both MNs and SFMNs for the adsorption of AO dye. The continuous AO dye adsorption was studied in fixed-bed column and the effects of bed height, influent flow rate, and initial dye concentration were investigated. The column performance was evaluated by breakthrough kinetic modeling and Yoon–Nelson model was fitted with the data. The results of this study showed that the surface modification of MNs using SDS enhanced the AO dye removal efficiency and SFMNs can be employed as an efficient nanoadsorbent for AO dye removal in batch and continuous mode of operation.

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