Modeling of continuous adsorption of greywater pollutants onto sawdust activated carbon bed integrated with sand column

2022 ◽  
pp. 107155
Author(s):  
Pushpraj Patel ◽  
Shubhi Gupta ◽  
Prasenjit Mondal
Keyword(s):  
Activated Carbon ◽  
Sand Column ◽  
Continuous Adsorption

scholarly journals Adsorption Characteristics of Humic Acids by Granular Activated Carbon

1997 ◽  
Vol 15 (7) ◽  
pp. 507-516 ◽  
Author(s):  
S.H. Lin ◽  
C.M. Lin
Keyword(s):  
Activated Carbon ◽  
Humic Acid ◽  
Surface Diffusion ◽  
Humic Acids ◽  
Granular Activated Carbon ◽  
Model Parameters ◽  
Adsorption System ◽  
Transfer Resistance ◽  
Liquid Phase Mass Transfer ◽  
Continuous Adsorption

The adsorption of humic acids on granular activated carbon has been investigated. A commerically available humic acid and that extracted from the bottom sludge of a dam were employed in the studies. Both batch and continuous adsorption experiments were conducted. A simplified competitive adsorption model in conjunction with the Freundlich isotherm was employed to represent the batch multicomponent adsorption system and a homogeneous surface diffusion model utilized to describe the continuous adsorption system in a packed-bed column. The model parameters were obtained by best fit of the models to the experimental adsorption data. The results indicated that the liquid-phase mass-transfer resistance, surface diffusion coefficient and the amount of adsorption on the activated carbon decreased with increasing molecular weight of the humic acid. It was also found that the adsorption of humic acid on the activated carbon was primarily a surface diffusion-controlled process.

scholarly journals High-performance Removal of Anti-inflammatory Using Activated Carbon from Water Treatment Plant Sludge: Fixed-bed and Batch Studies

2021 ◽  
Author(s):  
Alaor Valério Filho ◽  
Luana Vaz Tholozan ◽  
Aline Lemos Arim ◽  
André Ricardo Felkl de Almeida ◽  
GABRIELA SILVEIRA DA ROSA
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Adsorption Capacity ◽  
High Performance ◽  
Fixed Bed ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Maximum Adsorption Capacity ◽  
Continuous Adsorption ◽  
Anti Inflammatory

Abstract Activated carbon from water treatment sludge (WASC) was employed as adsorbent material to remove the anti-inflammatory Nimesulide (NM) from aqueous solutions. NM adsorption was performed in batch and fixed-bed systems, evaluating pH, adsorbent dosage, adsorption kinetics, equilibrium isotherm, continuous adsorption, and simulated effluents. The kinetic data were best fitted to the Elovich model and Intraparticle diffusion reaching the equilibrium at 120 min. Langmuir model presented a better description of the equilibrium data with the maximum adsorption capacity (qmax) of 274.99 mg g− 1 from NM adsorption by WASC. The adsorbent was tested in two simulated hospital effluents and proved to be an excellent adsorbent for removing NM from an aqueous solution with the presence of salts, sugars, and other inorganics. Finally, WASC was applied in fixed-bed NM adsorption obtaining the adsorption capacity of 217.28 mg g− 1.

Continuous adsorption of lead ions in a column packed with palm shell activated carbon

2008 ◽  
Vol 155 (1-2) ◽  
pp. 109-113 ◽  
Author(s):  
Gulnaziya Issabayeva ◽  
Mohamed Kheireddine Aroua ◽  
Nik Meriam Sulaiman
Keyword(s):  
Activated Carbon ◽  
Lead Ions ◽  
Continuous Adsorption ◽  
Palm Shell

scholarly journals Continuous adsorption and biotransformation of micropollutants by granular activated carbon-bound laccase in a packed-bed enzyme reactor

2016 ◽  
Vol 210 ◽  
pp. 108-116 ◽  
Author(s):  
Luong N. Nguyen ◽  
Faisal I. Hai ◽  
Anthony Dosseto ◽  
Christopher Richardson ◽  
William E. Price ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Packed Bed ◽  
Enzyme Reactor ◽  
Continuous Adsorption

scholarly journals Optimization of total trihalomethanes' (TTHMs) and their precursors' removal by granulated activated carbon (GAC) and sand dual media by response surface methodology (RSM)

2015 ◽  
Vol 16 (3) ◽  
pp. 783-793 ◽  
Author(s):  
Sajida Rasheed ◽  
Luiza. C. Campos ◽  
Jong. K. Kim ◽  
Qizhi Zhou ◽  
Imran Hashmi
Keyword(s):  
Response Surface Methodology ◽  
Activated Carbon ◽  
Response Surface ◽  
Quadratic Model ◽  
Residual Chlorine ◽  
Sand Column ◽  
Toc Removal ◽  
Chlorine Removal ◽  
Full Factorial ◽  
Granulated Activated Carbon

A response surface methodology (RSM) applying central composite design with rotatable full factorial (14 non-center and six center points) was used to discern the effect of granular activated carbon (GAC), sand and pH on total trihalomethanes (TTHMs) and humic acid (HA) removal from drinking water. Results showed efficient TTHMs and HA removal by GAC while a sand column showed little effect for TTHMs but was significant for total organic carbon (TOC) removal. With GAC and a sand column of 4 cm, a pH increase from 6 to 8 caused an increase in TTHM removal from 79.8 to 83.6% while a decrease in HA removal from 26.6 to 6.6% was observed. An increase in GAC column depth from 10 to 20 cm caused a slight increase in TTHM removal from 99.4 to 99.7%, while TOC removal was increased from an average of 38.85% to 57.4% removal. The developed quadratic model for TTHM removal (p = 0.048) and linear model for TOC removal (p = 0.039) were significant. GAC column depth (p < 0.0117) and column depth2 (p < 0.039) were the most significant factors. A 98% TTHMs, 30%TOC and 51% residual chlorine removal were optimized at 9 cm GAC and 4 cm sand column depth at pH 8 with desirability factor (D) 0.64.

scholarly journals Utilization of Tires Waste-Derived Magnetic-Activated Carbon for the Removal of Hexavalent Chromium from Wastewater

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 34
Author(s):  
Waqas Ahmad ◽  
Shanif Qaiser ◽  
Rahman Ullah ◽  
Badrul Mohamed Jan ◽  
Michael A. Karakassides ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Process ◽  
Xrd Analysis ◽  
Sample Volume ◽  
Composite Adsorbent ◽  
Continuous Adsorption ◽  
Magnetic Activated Carbon ◽  
Naoh Solution ◽  
Pseudo Second Order

The present study focuses on fabrication of magnetic activated carbon (M-AC) using tire waste and its potential investigation for adsorption of Cr (VI) from wastewater. The composite material (M-AC) was synthesized by pyrolysis followed by in situ magnetization method, and characterized by FTIR, FESEM, EDX, and XRD analysis. The maximum adsorption of Cr (VI) ion over composite adsorbent was found (~99.5%) to occur at pH 2, sample volume 10 mL, adsorbent dose 100 mg, contact time 30 min. The adsorption process was endothermic, feasible, spontaneous, and was found to follow pseudo second order of the reaction. The Cr ion could be completely desorbed (~99.3%) from the composite adsorbent by using 20 mL of 2 M NaOH solution. The composite adsorbent was regenerated by continuous adsorption and desorption for 5 consecutive cycles by using 10 mL 0.1 M HCl solution. M-AC also performed well in case of tannery wastewater by removing about 97% of Cr (VI).

scholarly journals Removal of Pb2+ Ions by ZSM-5/AC Composite in a Fixed-Bed Bench Scale System

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
R. Lakshmipathy ◽  
G. L. Balaji ◽  
Iván Leandro Rodríguez Rico
Keyword(s):  
Activated Carbon ◽  
Flow Rate ◽  
Fixed Bed ◽  
Carbon Composite ◽  
Breakthrough Curves ◽  
Flow Rates ◽  
Initial Concentration ◽  
Continuous Adsorption ◽  
Bed Height ◽  
Na Ions

This investigation suggests the implementation of ZSM-5 activated carbon composite as a prolific adsorbent for the continuous elimination of Pb2+ ions from water. Continuous adsorption experiments were performed by varying three parameters such as process flow rate (2-6 mL min-1), bed height (2-6 cm), and initial concentration (250–750 mg L-1). The highest loading capacity of the fixed-bed 213.3 mg L-1 was achieved with optimal values of 2 mL min-1 of flow rate, bed height of 6 cm, and initial concentration of 750 mg L-1, respectively. The breakthrough curves and saturation points were found to appear quickly for increasing flow rates and initial concentration and vice versa for bed depth. The lower flow rates with higher bed depths have exhibited optimal performances of the fixed-bed column. The mechanism of adsorption of Pb2+ ions was found to be ion exchange with Na+ ions from ZMS-5 and pore adsorption onto activated carbon. The breakthrough curves were verified with three well-known mathematical models such as the Adams-Bohart, Thomas, and Yoon-Nelson models. The later models showed the best fit to the column data over the Adams-Bohart model that can be utilized to understand the binding of Pb2+ ions onto the composite. Regeneration of ZSM-5/activated carbon was achieved successfully with 0.1 M HCl within 60 min of contact time. The outcomes conclude that ZSM-5 activated carbon composite is a prolific material for the continuous removal of water loaded with Pb2+ ions.

Thermal stability and decomposition of perfluoroalkyl substances on spent granular activated carbon

2020 ◽  
Author(s):  
Feng Xiao ◽  
Bin Yao ◽  
Pavankumar Challa Sasi ◽  
Svetlana Golovko ◽  
Dana Soli ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Perfluoroalkyl Substances
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