Coal based magnetic activated carbon as a high performance adsorbent for methylene blue

2016 ◽  
Vol 23 (4) ◽  
pp. 877-884 ◽  
Author(s):  
Shasha Gao ◽  
Lang Liu ◽  
Yakun Tang ◽  
Dianzeng Jia ◽  
Zongbin Zhao ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
High Performance ◽  
Magnetic Activated Carbon

Simultaneous removal of cationic methylene blue and anionic reactive red 198 dyes using magnetic activated carbon nanoparticles: equilibrium, and kinetics analysis

2018 ◽  
Vol 2017 (2) ◽  
pp. 534-545 ◽  
Author(s):  
Samer Abuzerr ◽  
Maher Darwish ◽  
Amir Hossein Mahvi
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
High Performance ◽  
Order Kinetic ◽  
Anionic Dyes ◽  
Solution Ph ◽  
Magnetic Activated Carbon ◽  
Reactive Red 198 ◽  
Equilibrium And Kinetics ◽  
Order Kinetic Model

Abstract For the simultaneous adsorption of cationic dye (methylene blue, MB) and anionic dye (reactive red 198, RR198) from aqueous solution, magnetic activated carbon (MAC) nanocomposite as a promising adsorbent was prepared and used. The concentration of MB at different time intervals was determined using a UV-Vis spectrophotometer while the concentration of RR198 was determined using a high performance liquid chromatography (HPLC) system. The effect of solution pH, contact time, adsorbent amount, and dye concentration were investigated. Also, both kinetic and isotherm experiments were studied. The optimum pH was 10 and 5.5 for adsorption of MB and RR198, respectively, and the equilibrium status was achieved after 120 min. The adsorption kinetics was controlled by the pseudo-second order kinetic model more than pseudo-first order. The best-fitted isotherms were Freundlich and Langmuir models for MB and RR198, respectively. The higher values of Freundlich adsorption capacity (Kf) for MB in comparison with RR198 refer to MAC affinity to remove cationic dyes more than anionic dyes. Apparently, there was no substantial change in the adsorption efficiency among the 10 adsorption–desorption cycles. Overall, MAC can be considered as an effective and efficient viable adsorbent for cationic and anionic dyes removal from industrial wastewaters.

Iron-Cobalt Magnetic Activated Carbon as an Effective Adsorbent for the Removal of Methylene Blue and Acid Blue 80

NANO ◽  
2021 ◽  
pp. 2150068
Author(s):  
Zhao Yang ◽  
Zhongwei Zhao ◽  
Xuan Yang ◽  
Zongli Ren
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Organic Dyes ◽  
Removal Rate ◽  
Recovery Process ◽  
Adsorption Activity ◽  
Magnetic Activated Carbon ◽  
Pseudo Second Order ◽  
Repeated Use ◽  
Acid Blue

For the treatment of dye wastewater, it is of great significance to develop new adsorbents with high adsorption capacity and good separation effect. In this study, the Fe-Co magnetic activated carbon material (CN-Fe-Co-AC) was first prepared by high-temperature calcination. CN-Fe-Co-AC is physically characterized by various methods. CN-Fe-Co-AC can efficiently and quickly remove the organic dyes methylene blue (MB) and acid blue 80 (AB80). The adsorption of MB and acid blue based on CN-Fe-Co-AC adsorbent is mainly through the specific surface area and the functional groups on the surface. During this recovery process, the adsorption activity of CN-Fe-Co-AC for MB and AB80 decreased slightly. Kinetic data can be described using a Pseudo-second-order model and the data for adsorption equilibrium can be described using the Langmuir isotherm. The theoretical adsorption capacities of MB and AB80 are 104.82[Formula: see text]mg/g and 26.94[Formula: see text]mg/g, respectively. After repeated use of five times, the removal rate of MB exceeded 96%, and the removal rate of AB80 exceeded 75%. The excellent adsorption performance and recyclability of CN-Fe-Co-AC indicate that this material has certain potential application value.

scholarly journals Beta-Cyclodextrin-Decorated Magnetic Activated Carbon as a Sorbent for Extraction and Enrichment of Steroid Hormones (Estrone, β-Estradiol, Hydrocortisone and Progesterone) for Liquid Chromatographic Analysis

Molecules ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 248
Author(s):  
Anele Mpupa ◽  
Azile Nqombolo ◽  
Boris Mizaikoff ◽  
Philiswa Nosizo Nomngongo
Keyword(s):  
Electron Microscopy ◽  
Activated Carbon ◽  
High Performance ◽  
Solid Phase ◽  
Extraction Procedure ◽  
Carbon Adsorbent ◽  
Analytical Techniques ◽  
Array Detector ◽  
Magnetic Activated Carbon ◽  
Wastewater Samples

A β-cyclodextrin-decorated magnetic activated carbon adsorbent was prepared and characterized using various analytical techniques (X-ray diffraction (XRD), scanning electron microscopy–electron diffraction spectroscopy (SEM-EDS) and transmission electron microscopy (TEM)), and the adsorbent was used in the development of a magnetic solid-phase microextraction (MSPE) method for the preconcentration of estrone, β-estradiol, hydrocortisone and progesterone in wastewater and river water samples. This method was optimized using the central composite design in order to determine the experimental parameters affecting the extraction procedure. The quantification of hormones was achieved using high-performance liquid chromatography equipped with a photodiode array detector (HPLC-DAD). Under optimum conditions, the linearity ranged from 0.04 to 300 µg L−1 with a correlation of determinations of 0.9969–0.9991. The limits of detection and quantification were between 0.01–0.03 and 0.033–0.1 µg L−1, with intraday and interday precisions at 1.1–3.4 and 3.2–4.2. The equilibrium data were best described by the Langmuir isotherm model, and high adsorption capacities (217–294 mg g−1) were obtained. The developed procedure demonstrated high potential as an effective technique for use in wastewater samples without significant interferences, and the adsorbent could be reused up to eight times.

High-Performance Magnetic Activated Carbon from Solid Waste from Lignin Conversion Processes. 1. Their Use As Adsorbents for CO2

2017 ◽  
Vol 5 (4) ◽  
pp. 3087-3095 ◽  
Author(s):  
Wenming Hao ◽  
Fredrik Björnerbäck ◽  
Yulia Trushkina ◽  
Mikel Oregui Bengoechea ◽  
Germán Salazar-Alvarez ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Solid Waste ◽  
High Performance ◽  
Magnetic Activated Carbon

High-Performance Magnetic Activated Carbon from Solid Waste from Lignin Conversion Processes. 2. Their Use as NiMo Catalyst Supports for Lignin Conversion

2017 ◽  
Vol 5 (12) ◽  
pp. 11226-11237 ◽  
Author(s):  
Mikel Oregui-Bengoechea ◽  
Nemanja Miletić ◽  
Wenming Hao ◽  
Fredrik Björnerbäck ◽  
Mali H. Rosnes ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Solid Waste ◽  
High Performance ◽  
Catalyst Supports ◽  
Magnetic Activated Carbon ◽  
Nimo Catalyst

scholarly journals Fabrication of Magnetic Nanoparticles Integrated Carbon Matrix from Chrysopogon zizanioides Roots: Strong Dye Adsorption and Persulphate Assisted Photodegradation

2021 ◽  
Vol 34 (1) ◽  
pp. 201-208
Author(s):  
A.P. Mary Sri Archana ◽  
A. Edwin Vasu
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Magnetic Nanoparticles ◽  
Rhodamine B ◽  
Photocatalytic Oxidation ◽  
Surface Acidity ◽  
Dye Adsorption ◽  
Potassium Persulphate ◽  
Magnetic Activated Carbon ◽  
Chrysopogon Zizanioides

Activated carbon with magnetic nanoparticles was prepared from the roots of Chrysopogon zizanioides by impregnating the biomass with Fe3+ followed by carbonization in a muffle furnace. To assist the carbonization process, Zn2+ ions were also taken along with ferric ions during impregnation. The pHZPC, density of surface functional groups, surface acidity constants and advanced characterizations like FT-IR, N2 adsorption-desorption isotherms, SEM with EDAX, DLS, XRD and VSM analysis were carried out. The adsorption and natural sunlight induced photooxidation of two cationic dyes, namely, methylene blue and rhodamine B in presence of potassium persulphate were studied by varying parameters like time, dye concentration, pH of the dye solution, amount of magnetic activated carbon and concentration of persulphate ions. The adsorption capacities of methylene blue and rhodamine B were found to be 5.97 and 0.96 mg/g, respectively. Photocatalytic oxidation of the dyes was very rapid in the presence of persulphate with the observed rate constants being 5.3 × 10–3 min–1 for methylene blue and 13.0 × 10–3 min–1 for rhodamine B. The magnetic activated carbon is found to be effective even after five successive degradation experiments.

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