CHARACTERIZATION AND COLUMN ADSORPTIVE TREATMENT FOR COD AND COLOR REMOVAL USING ACTIVATED NEEM LEAF POWDER FROM TEXTILE WASTEWATER

The textile wastewater samples before treatment processes has been collected and characterized using standard methods, in which COD, color and other contaminations are high and prior to remove before discharge. Feasibility of column adsorption of components contributing COD and color onto activated Neem Leaf Powder using sulphuric acid (a-NLP) from textile wastewater has been studied in this investigation. The effect of process parameters like different flow rate, bed-height and pH for COD and color removal has been analyzed, in which adsorption reached saturation faster with increasing the flow rate and pH; while it was the advantage of column adsorption with the increase in the a-NLP bed. The data were applied to Thomas, Yoon-Nelson, Bed Depth Service Time (BDST) and Adams and Bohart Model to evaluation of efficacy of the column. The maximum adsorption capacity related to Adams and Bohart model was found to be 725.7 and 380.4 mg/g for COD and color respectively at flow rate of 5 ml/min and bed height of 15 cm when a-NLP was used.

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FIXED-BED COLUMN ADSORPTION OF FLUOROQUINOLONE ANTIBIOTIC FROM AQUEOUS SOLUTION ONTO SUGARCANE BAGASSE BIOCHAR

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/58/3a/14279 ◽

2020 ◽

Vol 58 (3A) ◽

pp. 93

Author(s):

Linh Thuy Nguyen ◽

Thuy Thi Pham ◽

Hanh Thi Nguyen ◽

Hoai Thu Dang ◽

Khai Manh Nguyen ◽

...

Keyword(s):

Sugarcane Bagasse ◽

Flow Rate ◽

Fixed Bed ◽

Column Experiment ◽

Maximum Adsorption Capacity ◽

Fixed Bed Column ◽

Initial Concentration ◽

Bed Height ◽

Column Adsorption ◽

Fluoroquinolone Antibiotic

The ability of the agricultural residue of sugarcane bagasse to serve as an absorbent material used to remove Ciprofloxacin, one of strong Fluoroquinolone antibiotic from aqueous solutions in fixed-bed columns was investigated. The properties of biochar sugarcane bagasse were characterized using scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) spectroscopy before and after modification. The results of fixed bed column experiment showed that the shape of the removal efficiency of CIP and exhaustion time was dependent on bed height, flow rate and initial concentration. The maximum adsorption capacity qo predicted from Thomas modelreached 0.955mg/g at the flow rate of 1mL/min, initial concentration of 15mg/L and bed height of 6cm. From Yoon-Nelson equation, 3.38 minutes was the time required for 50% exhaustion of 12cm bed height column with the flow rate 2mL/min and concentration 15mg/L. Thomas and Yoon-Nelson models were in good agreement with the experimental breakthrough curve data.

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Kinetics and Equilibrium of Radioactive Metal Adsorption onto Sugarcane Bagasse Waste: Comparison of Batch and Column Adsorption Modes

Zeitschrift für Physikalische Chemie ◽

10.1515/zpch-2019-1418 ◽

2021 ◽

Vol 235 (3) ◽

pp. 281-294

Author(s):

Abida Kausar ◽

Haq Nawaz Bhatti ◽

Munawar Iqbal

Keyword(s):

Sugarcane Bagasse ◽

Flow Rate ◽

Breakthrough Curves ◽

Quadratic Model ◽

Waste Biomass ◽

Initial Concentration ◽

Bed Height ◽

Column Adsorption ◽

Central Composite ◽

Bagasse Waste

Abstract Sugarcane bagasse waste biomass (SBWB) efficacy for the adsorption of Zr(IV) was investigated in batch and column modes. The process variables i.e. pH 1–4 (A), adsorbent dosage 0.0–0.3 g (B), and Zr(IV) ions initial concentration 25–200 mg/L (C) were studied. The experiments were run under central composite design (CCD) and data was analysed by response surface methodology (RSM) methodology. The factor A, B, C, AB interaction and square factor A2, C2 affected the Zr(IV) ions adsorption onto SBWB. The quadratic model fitted well to the adsorption data with high R2 values. The effect of bed height, flow rate and Zr(IV) ions initial concentration was also studied for column mode adsorption and efficiency was evaluated by breakthrough curves as well as Bed Depth Service and Thomas models. Bed height and Zr(IV) ions initial concentration enhanced the adsorption of capacity of Zr(IV) ions, whereas flow rate reduced the column efficiency.

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Selective Removal of Hg2+ Ions from Water Using New Functionalized Silica Resin: Equilibrium, Thermodynamics and Kinetic Modeling Studies

Journal of the chemical society of pakistan ◽

10.52568/000588 ◽

2021 ◽

Vol 43 (4) ◽

pp. 436-436

Author(s):

Nida Shams Jalbani Nida Shams Jalbani ◽

Amber R Solangi Amber R Solangi ◽

Shahabuddin Memon Shahabuddin Memon ◽

Ranjhan Junejo Ranjhan Junejo ◽

Asif Ali Bhatti Asif Ali Bhatti

Keyword(s):

Adsorption Capacity ◽

Adsorption Mechanism ◽

Solid Phase ◽

Maximum Adsorption Capacity ◽

Adsorption Phenomenon ◽

Column Adsorption ◽

Pseudo Second Order ◽

Ft Ir ◽

Wastewater Samples ◽

Ft Ir Spectroscopy

In current study, the diphenylaminomethylcalix[4]arene (3) was synthesized and immobilized onto silica surface to prepare a selective, regenerable and stable resin-4. The synthesized resin-4 has been characterized by FT-IR spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX) and Brunauer-Emmett-Teller (BET) techniques. To check the adsorption capacity of resin-4, the batch and column adsorption methodology were applied and it has observed that the resin-4 was selectively removed Hg2+ ions under the optimized parameters. The maximum adsorption capacity was obtained at pH 9 using 25 mg/L of resin-4. Under the optimal conditions, different equilibrium, kinetic and thermodynamic models were applied to experimental data. The results show that adsorption mechanism is chemical in nature following Langmuir model with good correlation coefficient (R2=0.999) and having 712.098 (mmol/g) adsorption capacity. The energy of calculated from D-R model suggests the ion exchange nature of the adsorption phenomenon. Dynamic adsorption experiments were conducted using Thomas model. The maximum solid phase concentration (qo) was 7.5 and rate constant was found to be 0.176 with (R2=0.938) for Hg2+ ions. The kinetic study describes that the adsorption mechanism follows pseudo second order (R2=0.999). The thermodynamic parameters such as ∆H (0.032 KJ/mol) and ∆S (0.127 KJ/mol /K) and ∆G (-5.747,-6.306, -7.027 KJ/mol) shows that the adsorption of Hg2+ ion is endothermic and spontaneous. The reusability of resin-4 was also checked and it has observed that the after 15 cycle only 1.2 % adsorption reduces. Moreover, the resin-4 was applied on real wastewater samples obtained from local industrial zone of Karachi, Sindh-Pakistan.

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Adsorption characteristics of methylene blue onto agricultural wastes lotus leaf in bath and column modes

Water Science & Technology ◽

10.2166/wst.2011.665 ◽

2011 ◽

Vol 64 (3) ◽

pp. 654-660 ◽

Cited By ~ 1

Author(s):

Xiuli Han ◽

Wei Wang ◽

Xiaojian Ma

Keyword(s):

Methylene Blue ◽

Fixed Bed ◽

Isotherm Models ◽

Column Experiments ◽

Fixed Bed Column ◽

Lotus Leaf ◽

Bed Height ◽

Column Adsorption ◽

Equilibrium Data ◽

Leaf Powder

The adsorption potential of lotus leaf to remove methylene blue (MB) from aqueous solution was investigated in batch and ﬁxed-bed column experiments. Langmuir, Freundlich, Temkin and Koble–Corrigan isotherm models were employed to discuss the adsorption behavior. The results of analysis indicated that the equilibrium data were perfectly represented by Temkin isotherm and the Langmuir saturation adsorption capacity of lotus leaf was found to be 239.6 mg g−1 at 303 K. In ﬁxed-bed column experiments, the effects of flow rate, influent concentration and bed height on the breakthrough characteristics of adsorption were discussed. The Thomas and the bed-depth/service time (BDST) models were applied to the column experimental data to determine the characteristic parameters of the column adsorption. The two models were found to be suitable to describe the dynamic behavior of MB adsorbed onto the lotus leaf powder column.

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Batch and continuous fixed bed adsorption of heavy metals removal using activated charcoal from neem (Azadirachta indica) leaf powder

Scientific Reports ◽

10.1038/s41598-020-72583-6 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Himanshu Patel

Keyword(s):

Heavy Metals ◽

Flow Rate ◽

Activated Charcoal ◽

Batch Adsorption ◽

Order Kinetic ◽

Column Study ◽

Initial Concentration ◽

Bed Height ◽

Leaf Powder ◽

Batch Treatment

Abstract The present investigate was intended for adsorption of heavy metals i.e. Pb, Cu, Cr, Zn, Ni and Cd onto activated charcoal prepared from neem leaf powder (AC-NLP) using batch and column studies. Batch adsorption was performed using different variables like adsorbent dose, temperature and contact duration. Thermodynamic analysis of batch treatment concluded that adsorption is thermodynamically feasible and endothermic. This adsorption followed the Pseudo second-order kinetic model derived from correlation coefficient values of chemical kinetic studies. For column study, interpretation of breakthrough curves and parameters were conducted by varying flow rate, initial concentration and bed height; and reveal that optimum conditions were lower flow rate (5 mL/min) and lower initial concentration (5 mg/L) and higher bed height (20 cm). Comparisons of batch and column study through isotherm models were evaluated and column study is more preferred than batch treatment. Maximum Thomas adsorption capacity was achieved upto 205.6, 185.8, 154.5, 133.3, 120.6, 110.9 mg/g for Pb, Cu, Cd, Zn, Ni and Cr respectively. This removal pattern is elucidated by metal ionic properties. Various adsorbing agents such as acids and bases were utilized for adsorption–desorption of AC-NLP.

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FIXED-BED ADSORPTION OF AQUEOUS VANILLIN ONTO RESIN H103

IIUM Engineering Journal ◽

10.31436/iiumej.v18i2.804 ◽

2017 ◽

Vol 18 (2) ◽

pp. 94-104

Author(s):

Rozaimi Abu Samah

Keyword(s):

Aqueous Solution ◽

Flow Rate ◽

Adsorption Process ◽

Fixed Bed ◽

Maximum Adsorption Capacity ◽

Feed Flow Rate ◽

Fixed Bed Column ◽

Initial Concentration ◽

Bed Height ◽

Fixed Bed Adsorption

The main objective of this work was to design and model fixed bed adsorption column for the adsorption of vanillin from aqueous solution. Three parameters were evaluated for identifying the performance of vanillin adsorption in fixed-bed mode, which were bed height, vanillin initial concentration, and feed flow rate. The maximum adsorption capacity was increased more than threefold to 314.96 mg vanillin/g resin when the bed height was increased from 5 cm to 15 cm. Bohart-Adams model and Belter equation were used for designing fixed-bed column and predicting the performance of the adsorption process. A high value of determination coefficient (R2) of 0.9672 was obtained for the modelling of vanillin adsorption onto resin H103.

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Continuous fixed bed adsorption of Cu(II) by halloysite nanotube–alginate hybrid beads: an experimental and modelling study

Water Science & Technology ◽

10.2166/wst.2014.148 ◽

2014 ◽

Vol 70 (2) ◽

pp. 192-199 ◽

Cited By ~ 13

Author(s):

Yanyan Wang ◽

Xiang Zhang ◽

Qiuru Wang ◽

Bing Zhang ◽

Jindun Liu

Keyword(s):

Adsorption Capacity ◽

Flow Rate ◽

Fixed Bed ◽

Halloysite Nanotubes ◽

Fixed Bed Column ◽

Factors Affecting ◽

Bed Height ◽

Column Adsorption ◽

Fixed Bed Adsorption ◽

Adsorption Desorption

We used natural resources of halloysite nanotubes and alginate to prepare a novel porous adsorption material of organic–inorganic hybrid beads. The adsorption behaviour of Cu(II) onto the hybrid beads was examined by a continuous fixed bed column adsorption experiment. Meanwhile, the factors affecting the adsorption capacity such as bed height, influent concentration and flow rate were investigated. The adsorption capacity (Q0) reached 74.13 mg/g when the initial inlet concentration was 100 mg/L with a bed height of 12 cm and flow rate of 3 ml/min. The Thomas model and bed-depth service time fitted well with the experimental data. In the regeneration experiment, the hybrid beads retained high adsorption capacity after three adsorption–desorption cycles. Over the whole study, the new hybrid beads showed excellent adsorption and regeneration properties as well as favourable stability.

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Batch versus column modes for the adsorption of radioactive metal onto rice husk waste: conditions optimization through response surface methodology

Water Science & Technology ◽

10.2166/wst.2017.220 ◽

2017 ◽

Vol 76 (5) ◽

pp. 1035-1043 ◽

Cited By ~ 20

Author(s):

Abida Kausar ◽

Haq Nawaz Bhatti ◽

Munawar Iqbal ◽

Aisha Ashraf

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Rice Husk ◽

Flow Rate ◽

Ion Concentration ◽

Quadratic Model ◽

Batch Adsorption ◽

Batch Mode ◽

Bed Height ◽

Column Adsorption

Batch and column adsorption modes were compared for the adsorption of U(VI) ions using rice husk waste biomass (RHWB). Response surface methodology was employed for the optimization of process variables, i.e., (pH (A), adsorbent dose (B), initial ion concentration (C)) in batch mode. The B, C and C2 affected the U(VI) adsorption significantly in batch mode. The developed quadratic model was found to be validated on the basis of regression coefficient as well as analysis of variance. The predicted and actual values were found to be correlated well, with negligible residual value, and B, C and C2 were significant terms. The column study was performed considering bed height, flow rate and initial metal ion concentration, and adsorption efficiency was evaluated through breakthrough curves and bed depth service time and Thomas models. Adsorption was found to be dependent on bed height and initial U(VI) ion concentration, and flow rate decreased the adsorption capacity. Thomas models fitted well to the U(VI) adsorption onto RHWB. Results revealed that RHWB has potential to remove U(VI) ions and batch adsorption was found to be efficient versus column mode.

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