scholarly journals Adsorption efficiency of carbon from treated sugarcane bagasse in removing chromium (VI) from aqueous solutions by optimization of adsorption parameters

2009 ◽  
Vol 1 (2) ◽  
pp. 155-158
Author(s):  
Sucharita Tandon ◽  
N. Nandini
Keyword(s):  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Orthophosphoric Acid ◽  
Chemical Activation ◽  
Batch Adsorption ◽  
Adsorption Parameters ◽  
Chromium Vi ◽  
Adsorbate Concentration ◽  
Adsorption Technology ◽  
Process Factors

Adsorption is one of the effective techniques for removal of chromium (VI) from wastewater. In the present study, efforts have been made to develop adsorption technology for removing Chromium (Cr) VI from aqueous solutions by using sugarcane bagasse a waste which is left after taking out the juice. Activated carbon was prepared from waste sugarcane bagasse by chemical activation with orthophosphoric acid and burning for 3 hrs. Batch adsorption studies carried out showed that the adsorbent prepared from sugarcane bagasse has a significantcapacity in removing Cr (VI) from aqueous solutions. Optimization of certain adsorption process factors i.e. pH, agitation time; adsorbent dose and adsorbate concentration were also made.

scholarly journals Arsenic Removal from Water by Adsorption onto Iron Oxide/Nano-Porous Carbon Magnetic Composite

2019 ◽  
Vol 9 (18) ◽  
pp. 3732 ◽  
Author(s):  
Sahira Joshi ◽  
Manobin Sharma ◽  
Anshu Kumari ◽  
Surendra Shrestha ◽  
Bhanu Shrestha
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Arsenic Removal ◽  
Chemical Activation ◽  
Batch Adsorption ◽  
Magnetic Composite ◽  
One Pot ◽  
Magnetic Fe3o4

This study aimed to develop magnetic Fe3O4/sugarcane bagasse activated carbon composite for the adsorption of arsenic (III) from aqueous solutions. Activated carbon (AC) was prepared from sugarcane bagasse by chemical activation using H3PO4 as an activating agent at 400 °C. To enhance adsorption capacity for arsenic, the resultant AC was composited with Fe3O4 particles by facile one-pot hydrothermal treatment. This method involves mixing the AC with aqueous solution of iron (II) chloride tetrahydrate, polyvinyl pyrrolidone (PVP), and ethanol. Batch adsorption experiments were conducted for the adsorption of As (III) onto the composite. The effects of pH, adsorbent dosage, and contact time on the arsenic adsorption were studied. The result showed that the composite could remove the arsenic from the water far more effectively than the plain AC. The highest percentage of arsenic removal was found at pH at 8, adsorbent dose of 1.8 g/L, and contact time of 60 min. Langmuir and Freundlich adsorption isotherm was used to analyze the equilibrium experimental data. Langmuir model showed the best fit compared to the Freundlich model with a maximal capacity of 6.69 mg/g. These findings indicated that magnetic Fe3O4/sugarcane bagasse AC composite could be potentially applied for adsorptive removal of arsenic (III) from aqueous solutions.

scholarly journals Adsorption of Chromium(VI) from Aqueous Solutions by Coffee Polyphenol-Formaldehyde/Acetaldehyde Resins

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Khudbudin Mulani ◽  
Siona Daniels ◽  
Kishor Rajdeo ◽  
Sanjeev Tambe ◽  
Nayaku Chavan
Keyword(s):  
Aqueous Solutions ◽  
Solid Phase ◽  
Spectroscopic Method ◽  
Extraction Procedure ◽  
Ion Concentration ◽  
Maximum Adsorption Capacity ◽  
Adsorption Parameters ◽  
Chromium Vi ◽  
Decaffeinated Coffee ◽  
Solid Phase Extraction Procedure

Removal of chromium(VI) from wastewater is essential as it is toxic. Thus, removal of chromium(VI) was performed using coffee polyphenol-formaldehyde/acetaldehyde resins as adsorbents. Adsorbent resins were prepared by condensation of decaffeinated coffee powder with formaldehyde/acetaldehyde and used for the removal of Cr(VI) ions from aqueous solutions. A simple and sensitive solid phase extraction procedure was applied for the determination of chromium at trace levels by spectroscopic method using 1,5-diphenylcarbazide reagent. The adsorption of Cr(VI) on the coffee polyphenol-formaldehyde/acetaldehyde resins was monitored by FTIR and EDX analysis. The metal adsorption parameters such as contact time, pH, Cr(VI) ion concentration, and adsorbent dose were investigated. For Cr(VI), the maximum adsorption capacity of coffee polyphenol-formaldehyde resins was 98% at pH 2. The experimental results showed that Cr(VI) bound strongly with coffee polyphenol-formaldehyde/acetaldehyde resins and utilization of resins could be improved greatly by reuse.

scholarly journals Examination of the Effectiveness of Physical and Chemical Activation of Natural Bentonite for the Removal of Heavy Metal Ions from Aqueous Solutions

2002 ◽  
Vol 20 (2) ◽  
pp. 151-167 ◽  
Author(s):  
Fawzi Banat ◽  
Sameer Al-Asheh ◽  
Leena Abu-Aitah
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Chemical Activation ◽  
Sodium Dodecyl ◽  
Batch Adsorption ◽  
Initial Material ◽  
Solution Ph ◽  
Experimental Conditions ◽  
Activated Bentonite

The ability of physically and chemically activated bentonite to adsorb copper and nickel ions from aqueous solutions was examined under various experimental conditions. Physically activated bentonite was obtained by thermal treatment of the initial material in an oven at 700°C (T-bentonite), while chemically activated bentonite was obtained in two ways, either by treatment of the initial material with sodium dodecyl sulphate (SDS) as an anionic surfactant to give SDS-bentonite or with aluminium hydroxypolycation as a pillaring agent to give Al-bentonite. Batch adsorption tests were undertaken to study the removal of Cu2+ and Ni2+ ions from aqueous solutions using the above-mentioned types of activated bentonite. The adsorption capacity of the bentonites towards both Cu2+ and Ni2+ ions followed the order: Al-bentonite > SDS-bentonite > T-bentonite > natural bentonite. The initial metal concentration, solution pH, temperature and salinity of the solution affected the adsorption capacity towards both metal ions. The uptake of Cu2+ ions increased with an increase in temperature (25–45°C) as well as with an increase in the initial pH of the solution (3–5). The uptake of Cu2+ and Ni2+ ions decreased significantly with an increase in the NaCl and KCl concentrations present in the aqueous solution. Sulphuric acid of 0.1 M concentration was found to be an effective desorbent for bentonite laden with heavy metals.

Optimization of chromium(VI) sorption potential using developed activated carbon from sugarcane bagasse with chemical activation by zinc chloride

Desalination ◽  
2011 ◽  
Vol 275 (1-3) ◽  
pp. 276-284 ◽  
Author(s):  
K.J. Cronje ◽  
K. Chetty ◽  
M. Carsky ◽  
J.N. Sahu ◽  
B.C. Meikap
Keyword(s):  
Activated Carbon ◽  
Sugarcane Bagasse ◽  
Zinc Chloride ◽  
Chemical Activation ◽  
Chromium Vi ◽  
Sorption Potential

scholarly journals Adsorption of chromium (VI) ion using zeolite NaA/Fe3O4 composite derived from rice husk ash

2021 ◽  
Vol 947 (1) ◽  
pp. 012012
Author(s):  
Ngo Truong Ngoc Mai ◽  
Nguyen Thi Anh Thu ◽  
Ngo Truong Bao Trang ◽  
Pham Quoc Phu ◽  
Doan Van Hong Thien ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Batch Adsorption ◽  
Order Kinetic ◽  
X Ray Diffraction ◽  
Adsorption Parameters ◽  
X Ray ◽  
Chromium Vi ◽  
Zeolite Naa ◽  
Order Kinetic Model

Abstract In this study, zeolite NaA was fabricated from rice husk ash before combining with Fe3O4 to form a magnetic NaA/Fe3O4 composite. NaA/Fe3O4 composite was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), and Brunauer Emmett Teller (BET). The surface area and the pore size of zeolite NaA/Fe3O4 was 24.11 m2.g−1 and 23.04 Å. In addition, batch adsorption studies were carried out for the removal of chromium (VI) ion in aqueous solution. The effects of adsorption parameters, including pH solution, initial concentration of Cr (VI) ions, mass of adsorbent, and contact time were investigated. The maximum equilibrium adsorption capacity of zeolite NaA and NaA/Fe3O4 was 22.554 mg.g−1 and 13.722 mg.g−1, respectively. The pseudo-first order kinetic model fitted well to the experimental data. The regeneration of the adsorbent was also investigated for three cycles.

scholarly journals A novel approach for producing low cost and highly efficient activated carbon for removing cationic dyes

2019 ◽  
Vol 8 (2) ◽  
pp. 74-83
Author(s):  
Fatiha Moughaoui ◽  
Amine Ouaket ◽  
Asmae Laaraibi ◽  
Souad Hamdouch ◽  
Zoubida Anbaoui ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Sugarcane Bagasse ◽  
Low Cost ◽  
Chemical Activation ◽  
Cationic Dyes ◽  
Activation Time ◽  
Activation Temperature ◽  
Impregnation Ratio ◽  
Good Agreement

Chemical activation was used to prepare a low-cost activated carbon (AC) from an agricultural waste material: sugarcane bagasse. It was used as a green biosorbent for the removal of two cationic dyes from aqueous solutions (Methylene blue (MB) and Malachite Green (MG)). Central composite design (CCD) using response surface methodology (RSM) was applied in this work in order to run a limited number of experiments. The possibility of revealing the interaction of three selected factors: activation temperature, activation time, and chemical impregnation ratios at different levels for the process of preparing the AC were studied. Two-second order quadratic regression models for a yield of AC and capacity of adsorption were developed using JMP Software.The results of the process of optimization were carried out; it showed a good agreement between the predictive response of RSM model and the obtained experimental values with high correlation coefficients (R2) which indicates the efficacy of the model. The optimal activated carbon was obtained using 400°C activation temperature, 36 min activation time, and 2 impregnation ratio, resulting in 63.12 % of AC yield and 99.86 % for MB removal and 400°C activation temperature, 90 min activation time and 2 impregnation ratio, resulting in 45.69 % of AC yield and 99.75 % for MG removal. Moreover, the comparison between the experimental and the predicted values at optimum conditions was in good agreement with relatively small errors.This work showed the effectiveness and the performance of preparing activated carbon from sugarcane bagasse, and it recommended as an effective and green biosorbent for the removal of cationic dyes from aqueous solutions.

scholarly journals Preparation of Mesoporous Biochar from Cornstalk for the Chromium (VI) Elimination by Using One-Step Hydrothermal Carbonation

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Chao Wang ◽  
Jun Xie ◽  
Mingdong Zheng ◽  
Jinbo Zhu ◽  
Changliang Shi
Keyword(s):  
Batch Adsorption ◽  
Order Kinetic ◽  
Adsorption Parameters ◽  
Spectra Analysis ◽  
Chemical Surface ◽  
Chromium Vi ◽  
Pseudo Second Order ◽  
One Step ◽  
The One ◽  
Mesoporous Biochar

Hydrothermal carbon (HTC) was prepared by the one-step hydrothermal method for Cr (VI) removal from wastewater, which was considered a “green chemistry” method. The specific surface area (SBET) of HTC was 85 m2/g with the pore size in range of 2.0–24.0 nm. FT-IR spectra analysis showed that the HTC had abundant chemical surface functional groups. The influence of adsorption parameters such as pH, HTC dosage, Cr (VI) concentration, and contact time on the removal efficiency of Cr (VI) had been investigated. When the initial concentration was 50 mg/L, pH = 6, amount of adsorbent was 0.2 g/50 ml, and adsorption time was 90 min; the Cr (VI) absorbed rate of HTC reached 98%. Batch adsorption experiments indicated that Cr (VI) adsorption data of HTC fitted the Freundlich isothermal and pseudo-second-order kinetic models. Overall, our findings provide a promising material in treatment of Cr (VI)-rich wastewater and give a clear picture of its application, which is worthy of further study.

scholarly journals Adsorption and Characterization of Activated Sugarcane Bagasse Using Natrium Hydroxide

2021 ◽  
Vol 8 (3) ◽  
pp. 202-209
Author(s):  
Ade Priyanto ◽  
Malik F ◽  
Muhdarina Muhdarina ◽  
Awaluddin A
Keyword(s):  
Methylene Blue ◽  
Surface Area ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Chemical Activation ◽  
Optimum Conditions ◽  
Adsorbate Concentration ◽  
Blue Solution ◽  
Area And Volume

Sugarcane Bagasse can be used as an adsorbent both under natural conditions and modified by chemical activation using sodium hydroxide (NaOH). Activation of sugarcane bagasse with NaOH was carried out at variations of 5:1, 10:1, and 20:1 (w/w). The absorption ability of bagasse adsorbent to methylene blue solution was carried out with the parameters of variation of contact time (60, 90, 120, 150, and 180 minutes), adsorbate concentration (20, 30, 40, 50, and 60 ppm) and temperature (30, 40, 50, and 60 oC). The adsorbent's characterization included determining the functional groups using FTIR, morphology, and mass of elements using SEM-EDX, and determining the surface area and volume of adsorbent pores using the BET methods. The highest adsorption percentage results were found in the NASB10:1 adsorbent at 99.50%. The optimum conditions for the NASB10:1 adsorbent are with a contact time of 120 minutes, an adsorbate concentration of 50 ppm, and a temperature of 30 oC or 303 K. The NASB10:1 adsorbent has the highest surface area compared to other adsorbents, namely 2.803 m2/g so that it can perform the maximum absorption of methylene blue.

scholarly journals Characterization & Batch Sorption Study for Chromium (VI) Removal fromAqueous Solutions by Activated Carbon Adsorbent Prepared from Indigenous Sugarcane Bagasse

2020 ◽  
Vol 18 (02) ◽  
pp. 75-81
Author(s):  
Zulfiqar Ali Solangi ◽  
Zulfiqar Ali Bhatti ◽  
Kashif Hussain Mangi ◽  
Khadija Qureshi ◽  
Hira Lal Soni
Keyword(s):  
Sugarcane Bagasse ◽  
Sugar Industry ◽  
Low Cost ◽  
Carbon Adsorbent ◽  
Batch Process ◽  
Poor Countries ◽  
Industry Waste ◽  
Chromium Vi ◽  
Adsorbate Concentration ◽  
Adsorbent Dose

Chromium being a carcinogenic element present in drinking water in the less developed areas in the poor countries contributes to many infectious diseases. The removal of chromium traces from water needs to have an easy and efficient way for poor countries. Concerning this, a low-cost industrial bio-adsorbent based on bagasse (the sugar industry waste) is prepared and characterized for Cr (VI) removal from aqueous solutions. Preparation of the absorbent is performed by carbonization and steam activation of sugarcane bagasse (SCB). The FTIR spectra and the morphology of the adsorbent before and after Cr (VI) removal was studied using FTIR and SEM. All the experiments were carried out in a batch process with laboratory-prepared samples to study the effects of pH, adsorbent dose, adsorbate concentration, shaking time and shaking speed. It was observed that the highest removal efficiency was achieved at pH=2, adsorbent dose=0.75 g, adsorbate concentration=60 mg/L, shaking speed=150 rpm, and shaking time=20 minutes. These results suggest that this bio-adsorbent can provide a simple, effective, and cheap method for removing Cr (VI) ions from effluents and water resources.

scholarly journals Eugenia Jambolana Lam. Seed as an Adsorbent: Evaluation of Adsorptive Characteristics for Cr (VI) from Aqueous Solution

2019 ◽  
Vol 8 (4) ◽  
pp. 1260-1265
Keyword(s):  
Aqueous Solutions ◽  
Kinetic Models ◽  
Environmental Remediation ◽  
Second Order ◽  
Ion Concentration ◽  
Solution Temperature ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Chromium Vi ◽  
Eugenia Jambolana

Biosorption is one of the most useful techniques for environmental remediation especially for heavy metal pollution. Kinetics of the biosorption is of great significance to evaluate the performance of a given adsorbent and gain insight into the underlying mechanisms. Presently, the removal of chromium (VI) from aqueous solutions using Eugenia jambolana Lam. (commonly known as Jamun) seed investigated. Adsorption study were performed in batch adsorption techniques to evaluate various parameters like pH of the solution, time of contact between adsorbent and adsorbate, dose of adsorbent, chromium ion concentration and solution temperature. The adsorption of Cr(VI) increased with dose of adsorbent and reached maximum at 1.0g/ 100mL at pH 6. Kinetic models like pseudo first and second-order were used to correlate the adsorption data. For both kinetic models, kinetic constants were computed and the second-order rate expression fitted well with high correlation coefficient. Two isotherm models, namely; Freundlich and Langmuir isotherm were used to know adsorption mechanism and Langmuir correlated the data well inferring a monolayer adsorption at the binding sites on the surface of the adsorbent. It may be concluded that Eugenia jambolana Lam. seed can be used as an efficient adsorbent for removing Cr (VI) from aqueous solutions.

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