Disinfection By-Product Removal by Activated Carbon-using Batch mode

Activated carbon prepared from Ricinus communis Pericarp was used to remove Ni(II) from aqueous solution by adsorption. Batch mode adsorption experiments are carried out by varying contact time, metal-ion concentration, carbon concentration and pH to assess kinetic and equilibrium parameters. The adsorption data were modeled by using both Langmuir and Freundlich classical adsorption isotherms. The adsorption capacity (Qo) calculated from the Langmuir isotherm was 31.15 mg/g of activated carbon at initial pH of 5.0±0.2 for the particle size 125-250 µm.

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Reduction of COD from Micro-Polluted Water through Adsorption of Activated Carbon-Attapulgite Composite Adsorbent

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.450.445 ◽

2010 ◽

Vol 450 ◽

pp. 445-448

Author(s):

Zheng Wang ◽

Zhao Qian Jing ◽

Yu Kong ◽

Wei Shen

Keyword(s):

Activated Carbon ◽

Oxygen Demand ◽

Polluted Water ◽

Adsorption Model ◽

Batch Mode ◽

Composite Adsorbent ◽

Adsorption Data ◽

Complete Study ◽

Ph Range ◽

Optimum Ph Range

The aim of this study was the assessment of reduction of chemical oxygen demand (COD) from micro-polluted water using activated carbon-attapulgite composite adsorbent prepared using activated carbon and natural attapulgite through compounding, granulation and calcination. The complete study was done in batch mode to investigate the effect of operating parameters. Adsorption of COD was found to be dependent on contact time, pH, temperature and initial COD concentration. Adsorption equilibrium attained within 80 minutes time. The optimum pH range for adsorption of organics was found to be 8. The sorption of organics decreased with rise of temperature because adsorption process was exothermic. The studied adsorption data fitted well to Langmuir adsorption model with the correlation coefficient 0.9947. The activated carbon-attapulgite composite adsorbent in this study shows very good promise for practical applicability on removal of COD from micro-polluted water.

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Adsorption of Copper Ions (Cu++) in Aqueous Solution Using Activated Carbon and Biosorbent from Indian Jujube (Ziziphus mauritiana) Seed Hulls

Chemical Science International Journal ◽

10.9734/csji/2020/v29i530177 ◽

2020 ◽

pp. 13-24

Author(s):

Harouna Massai ◽

Djakba Raphael ◽

Mouhamadou Sali

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Copper Ions ◽

Carbon Powder ◽

Ziziphus Mauritiana ◽

Batch Mode ◽

Freundlich Model ◽

Jar Test ◽

Standard Procedures ◽

Indian Jujube

The present work aimed at mitigating the level of copper ions (Cu++) by adsorption in aqueous solution using activated carbon powder (AC) and biosorbent (BS) from the Indian jujube seed hulls. The AC and BS were prepared from the Indian jujube seed hulls and characterized using standard procedures. In addition, the adsorption effects of Indian jujube seed hulls through the AC and BS were carried out using jar test experiment (batch mode) at different pH (1, 2, 3, and 4), ionic strengths (100-600 mg/L) and stirring speed (120rpm). Therefore, it was found that the adsorption time at equilibrium were 10 and 5 minutes respectively for the AC and the BS. Furthermore, it was found that the reduction of copper ions were 99.40% and 73.08% for aqueous solutions of 100 ppm and 500 ppm respectively at the equilibrium state. It was also revealed that when the mass of the AC or the BS increases, the quantities of ions adsorbed per gram decrease. The maximum pH of adsorption for the AC was found to be pH=1, while it was found to be pH=4 for the BS. The Freundlich model indicated that the adsorption of copper ions by the Indian jujube is linear while the Temkin and Dubinin-Kagana-Radushkevich models described the adsorption as a physical reaction. It was finally observed that the adsorption of copper ions by the AC and the BS from Indian jujube seed hulls influenced by the addition of some concentration of NaCl.

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Effects of selection and compiling strategy of substrates in column-type vertical-flow constructed wetlands on the treatment of synthetic landfill leachate containing bisphenol A

Water Science & Technology ◽

10.2166/wst.2021.349 ◽

2021 ◽

Author(s):

Rajani Ghaju Shrestha ◽

Daisuke Inoue ◽

Michihiko Ike

Keyword(s):

Activated Carbon ◽

Bisphenol A ◽

Landfill Leachate ◽

Low Cost ◽

Oxygen Demand ◽

Ammonium Nitrogen ◽

Pollutant Removal ◽

Vertical Flow ◽

Batch Mode ◽

Synthetic Leachate

Abstract A constructed wetland (CW) is a low-cost, eco-friendly, easy-to-maintain, and widely applicable technology for treating various pollutants in the waste landfill leachate. This study determined the effects of the selection and compiling strategy of substrates used in CWs on the treatment performance of a synthetic leachate containing bisphenol A (BPA) as a representative recalcitrant pollutant. We operated five types of lab-scale vertical-flow CWs using only gravel (CW1), a sandwich of gravel with activated carbon (CW2) or brick crumbs (CW3), and two-stage hybrid CWs using gravel in one column and activated carbon (CW4) or brick crumbs (CW5) in another to treat synthetic leachate containing BPA in a 7-d sequential batch mode for 5 weeks. CWs using activated carbon (CW2 and CW4) effectively removed ammonium nitrogen (NH4-N) (99–100%), chemical oxygen demand (COD) (93–100%), and BPA (100%), indicating that the high adsorption capacity of activated carbon was the main mechanism involved in their removal. CW5 also exhibited higher pollutant removal efficiencies (NH4-N: 94–99%, COD: 89–98%, BPA: 89–100%) than single-column CWs (CW1 and CW3) (NH4-N: 76–100%, COD: 84–100%, BPA: 51–100%). This indicates the importance of the compiling strategy along with the selection of an appropriate substrate to improve the pollutant removal capability of CWs.

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Adsorptive Behavior of an Activated Carbon for Bisphenol A Removal in Single and Binary (Bisphenol A—Heavy Metal) Solutions

Water ◽

10.3390/w12082150 ◽

2020 ◽

Vol 12 (8) ◽

pp. 2150 ◽

Cited By ~ 1

Author(s):

M.A. Martín-Lara ◽

M. Calero ◽

A. Ronda ◽

I. Iáñez-Rodríguez ◽

C. Escudero

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Bisphenol A ◽

Contact Time ◽

Water Solution ◽

Metal Cations ◽

Maximum Adsorption Capacity ◽

Batch Mode ◽

Heavy Metal Cations ◽

Adsorptive Behavior

Bisphenol A (BPA) is an extensively produced and consumed chemical in the world. Due to its widespread use, contamination by this pollutant has increased in recent years, reaching a critical environmental point. This work investigates the feasibility of bisphenol A adsorption from industrial wastewater solutions, testing the reduction of bisphenol A in synthetic solutions by a commercial activated carbon, AC-40, in batch mode. Besides, mixtures of bisphenol A and different heavy metal cations were also studied. So far, no works have reported a complete study about bisphenol A removal by this activated carbon including the use of this material to remove BPA in the presence of metal cations. First, adsorption experiments were performed in batch changing pH, dose of adsorbent, initial bisphenol A concentration and contact time. Results showed greater retention of bisphenol A by increasing the acidity of the medium. Further, the percentage of bisphenol A adsorbed increased with increasing contact time. The selected conditions for the rest of the experiments were pH 5 and a contact time of 48 h. In addition, an increase in retention of bisphenol A when the dose of adsorbent increased was observed. Then, specific experiments were carried out to define the kinetics and the adsorption isotherm. Equilibrium data were adequately fitted to a Langmuir isotherm and the kinetics data fitted well to the pseudo-second-order model. The maximum adsorption capacity provided by Langmuir model was 94.34 mg/g. Finally, the effect of the presence of other heavy metals in water solution on the adsorption of bisphenol A was analyzed. Binary tests revealed competition between the adsorbates and a significant selectivity toward bisphenol A. Finally, the study of the adsorption performance in three consecutive adsorption–desorption cycles showed efficiencies higher than 90% in all cycles, indicating that the activated carbon has good reusability.

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Adsorption of malachite green dye from solution by magnetic activated carbon in batch mode

10.5004/dwt.2018.22072 ◽

2018 ◽

Vol 106 ◽

pp. 273-284 ◽

Cited By ~ 7

Author(s):

Yachan Rong ◽

Hui Li ◽

Linghui Xiao ◽

Qing Wang ◽

Yanyan Hu ◽

...

Keyword(s):

Activated Carbon ◽

Malachite Green ◽

Batch Mode ◽

Magnetic Activated Carbon ◽

Malachite Green Dye

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Kinetics and Isotherms Studies of methylene blue Basic Dye from Aqueous Solution onto Selenicereus grandiflorus Activated Carbon

Asian Journal of Materials Chemistry ◽

10.14233/ajmc.2019.ajmc-p71 ◽

2019 ◽

Vol 4 (1-2) ◽

pp. 1-6

Author(s):

M. Mahadeva Swamy ◽

B.M. Nagabhushana ◽

Nagaraju Kottam

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Activated Carbon ◽

Point Of Zero Charge ◽

Blue Dye ◽

Methylene Blue Dye ◽

Batch Mode ◽

Adsorption Studies ◽

Kinetics And Isotherms ◽

Adsorbent Dose

The present experiment explains the effectiveness of adsorption studies of methylene blue dye from aqueous solutions on activated carbon from Selenicereus grandiflorus (SG) treated with conc. sulfuric acid. The sulphuric acid-treated Selenicereus grandiflorus activated carbon (SGAC) was used as low-cost adsorbent for the removal of methylene blue dye from aqueous solution. It suggests an ideal alternative method to adsorption of dye compared to other expensive treatment options. The adsorption studies have been conducted at different experimental parameters, i.e., pH, contact time, adsorbent dose and initial dye concentration. The batch mode experiments were conducted by different adsorbent dose (0.03-0.150 g per 50 mL), pH of the solution (2-12), effect of time (3-18 min), initial dye concentration (10 mg/L), point of zero charge and regeneration of spent adsorbent studies. Langmuir model shows better fit to the equilibrium data (R2 = 0.966) than Freundlich model. The adsorption capacity (Qm) of SGAC increases with increasing dosage where Qm is 16.17 mg g-1.

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Batch adsorption studies for ketoprofen removal via Dillenia Indica peel activated carbon

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/920/1/012010 ◽

2021 ◽

Vol 920 (1) ◽

pp. 012010

Author(s):

F Fadzail ◽

M Hasan ◽

Z Mokhtar ◽

N Ibrahim ◽

O S An ◽

...

Keyword(s):

Activated Carbon ◽

Adsorption Process ◽

Chemical Activation ◽

Batch Adsorption ◽

Order Model ◽

Batch Mode ◽

Adsorbent Dosage ◽

Pseudo Second Order ◽

Dillenia Indica ◽

Experimental Findings

Abstract Removal of ketoprofen using Dillenia Indica peel activated carbon was investigated using batch adsorption at a laboratory scale. Chemical activation method with the aid of phosphoric acid was utilised in preparing the activated carbon. The adsorption experiments were evaluated using various factors which, are initial concentration, adsorbent dosage, and pH of ketoprofen. The optimum condition was determined to be at pH 6 and adsorbent dosage of 0.4 g with a most KTP uptake of 8.354 mg/g. The experimental findings showed that adsorption is favorable at lower pH. Isotherm studies were conducted and the data indicated that Langmuir isotherm was well fitted to the adsorption process and the pseudo-second-order model was more preferable in simulating the kinetic process. In essence, Dillenia Indica peel activated carbon was proven as being a favourable adsorbent for the uptake of ketoprofen in batch mode.

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Comparison Study of Adsorption of Lead and Methylene Blue on Zeolite, Activated Carbon and Their Composite Materials

Journal of Engineering ◽

10.31026/j.eng.2019.08.09 ◽

2019 ◽

Vol 25 (8) ◽

pp. 129-148

Author(s):

Rafie Rushdy Mohammed

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Activated Carbon ◽

Composite Materials ◽

Synthesis Method ◽

Nitrogen Adsorption ◽

Batch Mode ◽

Thermally Activated ◽

Optimum Synthesis ◽

Pseudo Second Order

In this study, composite materials consisting of Activated Carbon (AC) and Zeolite were prepared for application in the removal of methylene blue and lead from an aqueous solution. The optimum synthesis method involves the use of metakaolinization and zeolitization, in the presence of activated carbon from kaolin, to form Zeolite. First, Kaolin was thermally activated into amorphous kaolin (metakaolinization); then the resultant metakaolin was attacked by alkaline, transforming it into crystalline zeolite (zeolitization). Using nitrogen adsorption and SEM techniques, the examination and characterization of composite materials confirmed the presence of a homogenous distribution of Zeolite throughout the activated carbon. It has also shown the carbonization process did not destroy the crystalline structure of the zeolite, which was revealed to be intact. Experiments in batch mode were conducted (using three differently-prepared composites, zeolite and activated carbon), to investigate the removal of methylene blue and lead from the aqueous solution of the sorbents. Key experimental parameters (initial concentration, pH, contact time and adsorbent dosage) from the obtained results were measured and analysed. Freundlich and Langmuir models were used to describe the adsorption isotherms, and the observed adsorption kinetic adhered to pseudo-second order.

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The Adsorption Efficiency of Chemically Prepared Activated Carbon from Cola Nut Shells by on Methylene Blue

Journal of Chemistry ◽

10.1155/2013/469170 ◽

2013 ◽

Vol 2013 ◽

pp. 1-7 ◽

Cited By ~ 24

Author(s):

Julius Ndi Nsami ◽

Joseph Ketcha Mbadcam

Keyword(s):

Methylene Blue ◽

Activated Carbon ◽

Experimental Studies ◽

Isotherm Models ◽

Solution Ph ◽

Batch Mode ◽

Initial Concentration ◽

Adsorption Isotherm Models ◽

Pseudo Second Order ◽

Blue Solution

The adsorption of methylene blue from aqueous solution onto activated carbon prepared from cola nut shell has been investigated under batch mode. The influence of major parameters governing the efficiency of the process such as, solution pH, sorbent dose, initial concentration, and contact time on the removal process was investigated. The time-dependent experimental studies showed that the adsorption quantity of methylene blue increases with initial concentration and decreasing adsorbent dosage. The equilibrium time of 180 min was observed and maximum adsorption was favoured at pH 3.5. The dye removal using 0.1 g of adsorbent was more than 90%. This dosage (0.1 g) was considered as the optimum dosage to remove methylene blue from aqueous solutions. The equilibrium adsorption data were analyzed by the Freundlich, Langmuir adsorption isotherm models. The kinetics of methylene blue solution was discussed by pseudo-first-order, pseudo-second-order, and Elovich models. The adsorption process follows the Elovich rate kinetic model, having a correlation coefficient in the range between 0.9811 and 1.

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