scholarly journals Rhodamine-B dye removal using aliquat-336 modified amberlite XAD-4 resin in fixed-bed columns in series

2021 ◽  
Author(s):  
Muzaffar Iqbal ◽  
Dipaloy Datta
Keyword(s):  
Flow Rate ◽  
Rhodamine B ◽  
Fixed Bed ◽  
Interaction Mechanism ◽  
Breakthrough Curves ◽  
Aliquat 336 ◽  
Effective Removal ◽  
Single Column ◽  
In Series ◽  
Clark Model

Abstract The present work reports studies on the effective removal of Rhodamine-B (RhB) using Aliquat-336 modified Amberlite XAD-4 resin in the fixed-bed columns in series. The effect of flow rate (Q = 2 to 6 mL·min−1), bed height (h = 3.5 to 7 cm) and initial RhB dye concentration (Cin = 10 to 20 mg·L−1) was studied. When a single column was used, 93% RhB dye was removed in 3 h at Q = 2 mL·min−1, Cin = 10 mg·L−1, and h = 7 cm. When three columns in series were used, almost 100% dye was removed until 80 h. The maximum breakthrough time (142 h) and saturation time (244 h) were found by keeping Q = 2 mL·min−1, h = 7 cm of each column and Cin = 10 mg·L−1. Mathematical modeling of the breakthrough curves was done by using Yoon-Nelson, Clark, Wolborska, and pore diffusion models. The Clark model best fitted the experimental data. The possible interaction mechanism between Aliquat-336 and RhB dye was proposed. The column was regenerated in continuous mode using 1 M HCl solution and maintaining a flow rate of 2 mL·min−1.

scholarly journals Sorption of Ag+ and Cu2+ by Vermiculite in a Fixed-Bed Column: Design, Process Optimization and Dynamics Investigations

2018 ◽  
Vol 8 (11) ◽  
pp. 2221 ◽  
Author(s):  
Olga Długosz ◽  
Marcin Banach
Keyword(s):  
Flow Rate ◽  
Continuous Process ◽  
Fixed Bed ◽  
Copper Ion ◽  
Cost Effective ◽  
Breakthrough Curves ◽  
Fixed Bed Column ◽  
Column System ◽  
Total Percentage ◽  
Bed Height

Vermiculite has been used for the removal of Cu 2 + and Ag + from aqueous solutions in a fixed-bed column system. The effects of initial silver and copper ion concentrations, flow rate, and bed height of the adsorbent in a fixed-bed column system were investigated. Statistical analysis confirmed that breakthrough curves depended on all three factors. The highest inlet metal cation concentration (5000 mg/dm3), the lowest bed height (3 cm) and the lowest flow rate (2 and 3 cm3/min for Ag + and Cu 2 + , respectively) were optimal for the adsorption process. The maximum total percentage of metal ions removed was 60.4% and 68.7% for Ag+ and Cu2+, respectively. Adsorption data were fitted with four fixed-bed adsorption models, namely Clark, Bohart–Adams, Yoon–Nelson and Thomas models, to predict breakthrough curves and to determine the characteristic column parameters. The adsorbent was characterized by SEM, FTIR, EDS and BET techniques. The results showed that vermiculite could be applied as a cost-effective sorbent for the removal of Cu 2 + and Ag + from wastewater in a continuous process.

Pilot Scale Continuous Adsorption of Soluble Oil Wastewater by Modified Sugarcane Bagasse with Al2(SO4)3 as Adsorbent

2020 ◽  
Vol 990 ◽  
pp. 177-182
Author(s):  
Toungrat Janpattanapong ◽  
Kowit Piyamongkala ◽  
Von Louie R. Manguiam
Keyword(s):  
Sugarcane Bagasse ◽  
Flow Rate ◽  
Adsorption Process ◽  
Fixed Bed ◽  
Pilot Scale ◽  
Breakthrough Curves ◽  
Continuous Adsorption ◽  
Before And After ◽  
Significant Uptake ◽  
Oil Wastewater

The modified sugarcane bagasse with aluminum sulfate was used as an adsorbent for the removal of soluble oil wastewater. The effects of the flow rate, 5 and 10 cm3/min and the number of columns used were thoroughly investigated in a continuous up-flow adsorption process. At the flow rate of 5 cm3/min respected to the 2nd column, the highest breakthrough point to adsorb soluble oil wastewater was at 6 hrs. The results confirmed that the modified sugarcane bagasse can be used as an adsorbent for fixed-bed continuous adsorption of soluble oil wastewater from steel pipe factory. The breakthrough curves were predicted by Yoon-Nelson model. This model may be fitted to predict the overall breakthrough curve using the experimental data gathered. In addition, the significant uptake of the soluble oil wastewater was demonstrated by the changes in the heat of combustion of the modified sugarcane bagasse before and after the adsorption process.

Fixed-Bed Column Study for the Removal of Ag(I)and Cr(III) from Aqueous Solutions Using Puffed Rice Husk

2011 ◽  
Vol 287-290 ◽  
pp. 1620-1625
Author(s):  
Yan Wu ◽  
Zai Fang Deng ◽  
Yang Tao ◽  
Xue Gang Luo
Keyword(s):  
Aqueous Solutions ◽  
Rice Husk ◽  
Flow Rate ◽  
Service Time ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Model Parameters ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Puffed Rice

Fixed-bed column studies for the removal of Ag(Ⅰ) and Cr(Ⅲ) from individual aqueous solutions using puffed rice husk were investigated in this work. The experiments were conducted to study the effect of important column parameters such as bed height, feed flow rate and feed initial concentration of solution. It was found that increasing bed depth yielded longer service time while increase in influent concentration and flow rate resulted in faster breakthrough. Bed Depth Service Time (BDST) model was applied to analyze the experimental data and the model parameters were evaluated. Good agreement of the experimental breakthrough curves with the model predictions was observed.

scholarly journals Adsorption of malachite green in a fixed-bed columns by Thiourea modified poly(acrylonitrile-co-acrylic acid)

2019 ◽  
Vol 25 (4) ◽  
pp. 383-393
Author(s):  
Abel Adeyi ◽  
Siti Jamil ◽  
Luqman Abdullah ◽  
Thomas Choong ◽  
Mohammad Abdullah ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Malachite Green ◽  
Flow Rate ◽  
Dynamic Models ◽  
Fixed Bed ◽  
Correlation Coefficients ◽  
Packed Bed ◽  
Breakthrough Curves ◽  
Solution Ph ◽  
Poly Acrylonitrile

Thiourea-modified poly(acrylonitrile-co-acrylic acid) (TU-poly(AN-co-AA)) polymeric adsorbent was synthesized and characterized with Fourier-transform infrared (FTIR) spectroscopy, scanning electron microscope (SEM) and Zetasizer. Adsorptive removal of cationic malachite green (MG) dye from aqueous solution in a continuous TU-poly(AN-coAA) packed-bed column was studied. The influences of solution pH (2-9), inlet MG concentration (25-80 mg/L), bed depth (4-8 cm) and linear flow rate (1.5-5.0 mL/min) were investigated via assessment of the column breakthrough curves. Low pH and short bed depth, high MG concentration and flow rate led to early breakthrough of MG. According to correlation coefficients (R2) and sum of the squares of the errors (SSE) values, Thomas and Yoon-Nelson dynamic models are more suitable to describe the column experimental data compared to the Bohart-Adams model. TU-poly(AN-co-AA) exhibited effective separation of MG from the liquid phase and displayed high adsorption capacities after five regeneration cycles.

scholarly journals Synthesis and application of CeO2/sawdust nanocomposite for removal of As (III) ions from aqueous solutions using a fixed bed column system

2016 ◽  
Vol 19 (1) ◽  
pp. 7-16 ◽  
Keyword(s):  
Aqueous Solutions ◽  
Flow Rate ◽  
Fixed Bed ◽  
Cost Effective ◽  
Sorption Process ◽  
Breakthrough Curves ◽  
Precipitation Method ◽  
Thomas Model ◽  
Influent Concentration ◽  
Column System

<p>In this study, nanocomposite of ceria sawdust (CeO<sub>2</sub>/SD) synthesized by precipitation method was utilized for removal of As (III) ions from aqueous solutions. Study of the process was done in column system. Characterization of the nano sized adsorbent particles was carried out using XRD and SEM techniques. The effects of important parameters, such as the value of initial pH, the flow rate, the influent concentration of arsenic and bed depth were studied in the column system. The Thomas model was applied for treatment of the adsorption data at different flow rate, influent concentration and bed depth. The bed-depth/service time analysis (BDST) model was also applied at different bed depth to predict the breakthrough curves. The two models were found suitable for describing the bio sorption process of the dynamic behavior of the CeO<sub>2</sub>/SD adsorbent in column investigation. Based on Thomas model, the equilibrium adsorption reached 8.28 mg g<sup>−</sup><sup>1</sup> when a As(III) polluted solution with influent concentration of As 10 mg l<sup>-1 </sup>passed through the column with a flow rate of 2 ml min<sup>−</sup><sup>1</sup>. All the results suggested the presented nanocomposite as an efficient and cost effective adsorbent for removal of As (III) ions from aqueous solutions.</p>

scholarly journals A Fixed-Bed Column Study for Removal of Organic Dyes from Aqueous Solution by Pre-Treated Durian Peel Waste

2019 ◽  
Vol 19 (2) ◽  
pp. 486 ◽  
Author(s):  
Nguyen Thi Thuong ◽  
Nguyen Thi Tuyet Nhi ◽  
Vo Thi Cam Nhung ◽  
Hoang Ngoc Bich ◽  
Bui Thi Phuong Quynh ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Flow Rate ◽  
Crystal Violet ◽  
Organic Dyes ◽  
Fixed Bed ◽  
Complete Removal ◽  
Breakthrough Curves ◽  
Experimental Conditions ◽  
Fixed Bed Column ◽  
Efficient Treatment

A number of harmful effects on the ecosystem, the life of humankind, and living species caused by dye-contaminated wastewater have urged the development for an efficient and cost-efficient treatment method for colored effluents. The cellulose-based adsorbents have been considered as a facile and efficient approach to remove hazardous pollutants because of the abundance of inexpensive agricultural wastes in Viet Nam. This study aims to investigate the elimination of methylene blue (MB) and crystal violet (VL) from wastewater using a fixed-bed column of pre-treated durian peel. Examined variables in the process are bed depths (2–6 cm), flow rate (5–20 mL/min), and influent dye concentrations (200–600 mg/L). The highest adsorption amount of pre-treated DP was 235.80 mg/g and 527.64 mg/g, respectively, on a 600 mg/L of methylene blue and crystal violet achieved within a bed height of 4 cm and a flow rate of 10 mL/min. Accordingly, the breakthrough curves were constructed and modeled using the relevant theoretical models under the effects of different experimental conditions. Pre-treated durian peel was found to exhibit high adsorption capacity for cationic dye in an initial concentration of 200–600 mg/L with complete removal being obtained.

Adsorption of chloro-anilines from solution by modified peanut husk in fixed-bed column

2013 ◽  
Vol 68 (10) ◽  
pp. 2158-2163 ◽  
Author(s):  
Shenglong Zhang ◽  
Randi Zhang ◽  
Wei Xiao ◽  
Runping Han
Keyword(s):  
Flow Rate ◽  
Low Cost ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Ammonium Bromide ◽  
Spectroscopy Analysis ◽  
Time Model ◽  
Fixed Bed Column ◽  
Column Adsorption ◽  
Critical Bed Depth

Natural peanut husk (NPH) modified with hexadecyl trimethyl ammonium bromide (CTAB) was used as adsorbent to remove 2,5-dimethoxy-4-chloroaniline (DMCH) from solution in a fixed-bed column. Fourier transform infrared spectroscopy analysis and X-ray fluorescence of NPH and modified peanut husk (MPH) showed that CTAB had been introduced onto the surface of NPH. The effects of flow rate and bed depth on breakthrough curves were studied. The Thomas model and the Yan model were selected to fit the column adsorption data and the results showed that the Yan model was better at predicting the breakthrough curves. The adsorption quantity was up to 6.46 mg/g according to the Yan model. The bed depth service time model was used to calculate the critical bed depth from experimental data and it was directly related to flow rate. As a low-cost adsorbent, MPH is promising for the removal of DMCH from solution.

Adsorption Breakthrough Curves for Alkaline-Earth Metal Ions on the Resins in a Fixed-Bed Column

2014 ◽  
Vol 884-885 ◽  
pp. 16-20
Author(s):  
Hai Ning Liu ◽  
Hui Fang Zhang ◽  
Can Gao ◽  
Xiu Shen Ye ◽  
Zhi Jian Wu
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Flow Rate ◽  
Alkaline Earth ◽  
Fixed Bed ◽  
Earth Metal ◽  
Breakthrough Curves ◽  
Ion Concentration ◽  
Alkaline Earth Metal ◽  
Alkaline Earth Metal Ions

A column sorption study was carried out by using four resins (D113, D001, LS-1000, LS-5000) for the adsorption of alkaline-earth metal ions from aqueous solutions. The breakthrough curve was obtained as a function of feed flow rate, and the total and breakthrough capacity values of the resins were calculated. Four kinetic models: Adams-Bohart, Wolborska and Thomas models were applied to experimental data to predict the breakthrough curves of Na-form resins and to determine the characteristic parameters of the column useful for process design. All models were found suitable for describing the whole or a definite part of the dynamic behavior of the column with respect to flow rate and inlet ion concentration. The results obtained would be helpful for the understanding of the competitive adsorption processes and the recovery or removal of one or more alkaline-earth metal ions from aqueous solutions.

scholarly journals Adsorption of Sb(III) from Aqueous Solution by nZVI/AC: A Magnetic Fixed-Bed Column Study

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1912
Author(s):  
Huijie Zhu ◽  
Qiang Huang ◽  
Mingyan Shi ◽  
Shuai Fu ◽  
Xiuji Zhang ◽  
...  
Keyword(s):  
Flow Rate ◽  
Fixed Bed ◽  
Feed Solution ◽  
Breakthrough Curves ◽  
Contaminated Water ◽  
Solution Ph ◽  
Fixed Bed Column ◽  
Ph Values ◽  
Bed Height ◽  
Bed Capacity

The effectiveness of nanoscale zero-valent iron(nZVI) immobilized on activated carbon (nZVI/AC) in removing antimonite (Sb(III)) from simulated contaminated water was investigated with and without a magnetic fix-bed column reactor. The experiments were all conducted in fixed-bed columns. A weak magnetic field (WMF) was proposed to increase the exclusion of paramagnetic Sb(III) ions by nZVI/AC. The Sb(III) adsorption to the nZVI and AC surfaces, as well as the transformation of Sb(III) to Sb(V) by them, were both increased by using a WMF in nZVI/AC. The increased sequestration of Sb(III) by nZVI/AC in the presence of WMF was followed by faster nZVI corrosion and dissolution. Experiments were conducted as a function of the pH of the feed solution (pH 5.0–9.0), liquid flow rate (5–15 mL·min−1), starting Sb(III) concentration (0.5–1.5 mg·L−1), bed height nZVI/AC (10–40 cm), and starting Sb(III) concentration (0.5–1.5 mg·L−1). By analyzing the breakthrough curves generated by different flow rates, different pH values, different inlet Sb(III) concentrations, and different bed heights, the adsorbed amounts, equilibrium nZVI uptakes, and total Sb(III) removal percentage were calculated in relation to effluent volumes. At pH 5.0, the longest nZVI breakthrough time and maximal Sb(III) adsorption were achieved. The findings revealed that the column performed effectively at the lowest flow rate. With increasing bed height, column bed capacity and exhaustion time increased as well. Increasing the Sb(III) initial concentration from 0.5 to 1.5 mg·L−1 resulted in the rise of adsorption bed capacity from 3.45 to 6.33 mg·g−1.

scholarly journals Penentuan Kapasitas Adsorpsi Selulosa Terhadap Rhodamin B dalam Sistem Dinamis

2017 ◽  
Vol 2 (1) ◽  
pp. 23
Author(s):  
Asnawati Asnawati
Keyword(s):  
Adsorption Capacity ◽  
Flow Rate ◽  
Rhodamine B ◽  
Dynamic Method ◽  
Breakthrough Curves ◽  
Column Diameter ◽  
Ph Optimum ◽  
Model Equations ◽  
Rhodamin B

AbstrakPenelitian ini bertujuan untuk menentukan kapasitas adsorpsi selulosa, massa optimum dan pH optimum. Kapasitas adsorbsi ditentukan dengan sistem dinamis dengan kecepatan 1 mL/12 menit melalui kolom, diameter 8 mm mengandung selulosa. Metoda ini dibuat dengan menvariasikan massa adsorbent dan pH Rhodamine B. kapasitas adsorpsi selulosa ditentukan dengan menggunakan persamaan Thomas. kurva Breakthrough digunakan untuk mengetahui keefektifan kolom dalam mengadsorpsi Massa adsorben divariasikan sebesar 0,1; 0,2; dan 0,3 gram serta pH larutan influen divariasikan pada pH 5, 6 dan 7. Massa adsorben dan pH larutan influen dengan kapasitas adsorpsi paling optimum adalah massa 0,3 gram dan pH 7. Kapasitas adsorpsi selulosa terhadap Rhodamin B sebesar 5, 94 mg/g. Kata kunci: Adsorpsi, Rhodamin B, selulosa, sistem dinamis AbstractThis study is to determine the adsorption capacity of the cellulose to Rhodamine,  the mass optimum and pH optimum. Cellulose adsorption capacity is determined in a dynamic method with a flow rate of 1 mL/12 minutes through the column, diameter of 8 mm, containing cellulose. This method was made variations of the mass of adsorbent and the pH of the influent Rhodamine B solution. Determination of the adsorption capacity of cellulose in this study used the model equations Thomas. Breakthrough curves were used to determine the effectiveness of the column in which cellulose adsorb.  Mass adsorbent and the pH of the influent with the highest adsorption capacity is mass of 0.3 grams and pH 7. The adsorption capacity of cellulose to Rhodamine B is 5,94 mg/g Keywords: Adsorption, Rhodamine B, cellulose, dynamic system

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