Novel high performance magnetic activated carbon for phenol removal: equilibrium, kinetics and thermodynamics

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.

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Phenol removal from synthetic wastewater with powdered activated carbon: Isotherms, kinetics and thermodynamics

Environmental Research and Technology ◽

10.35208/ert.692302 ◽

2020 ◽

Vol 3 (1) ◽

Author(s):

Elanur ADAR ◽

İpek Nur ATAY ◽

Kubilay BÜNCÜ ◽

Mehmet Sinan BİLGİLİ

Keyword(s):

Activated Carbon ◽

Powdered Activated Carbon ◽

Synthetic Wastewater ◽

Phenol Removal ◽

Kinetics And Thermodynamics

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

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.6b02795 ◽

2017 ◽

Vol 5 (4) ◽

pp. 3087-3095 ◽

Cited By ~ 29

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

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Preparation of Magnetically Separable Composite Photocatalyst: Titania Coated Magnetic Activated Carbon

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.719-720.145 ◽

2015 ◽

Vol 719-720 ◽

pp. 145-156

Author(s):

Qing Wei Zhang ◽

Wei Xie ◽

Bao Hong Shen ◽

Qiang Xie ◽

Xiao Liang Li

Keyword(s):

Activated Carbon ◽

Magnetic Particles ◽

Sol Gel ◽

Carbon Matrix ◽

Phenol Removal ◽

Step Method ◽

Visible Absorption ◽

Magnetic Activated Carbon ◽

Magnetic Stability ◽

Embedded Type

In the present work, the embedded-type TiO2/magnetic activated carbon (TiO2/MAC) photocatalysts were prepared. The MAC support was manufactured by one-step method and the TiO2coated on the surface of MAC was prepared by sol-gel method. Its crystalline structural properties, morphology, magnetic performances and pore texture were characterized by XRD, SEM, TEM, ultraviolet-visible absorption spectra (Uv-vis), vibrating sample magnetometry (VSM) and N2adsorption isotherm. Characterization results showed that TiO2was highly dispersed on the surface of MAC support in the form of anatase with a particle size of 10 nm. Obtained TiO2/MAC photocatalysts were applied to treatment of contaminant phenol in aqueous solution. The phenol removal percentage by TiO2/MAC photocatalyst is as high as 94% after three cycles. In addition, photocatalytic degradation of phenol in water was examined using TiO2/MAC photocatalysts. The results show that 4wt% Fe3O4was suitable to prepare the support of TiO2/MAC composite. The phenol removal percentage by TiO2/MAC photocatalyst is as high as 94% after three cycles. However, the adsorption capability of photocatalyst disappears after six cycles, while its phenol removal percentage via photodegradation is still as high as 60%. Meanwhile, the used TiO2/MAC photocatalyst after six cycles still maintains good magnetic stability because the majority of magnetic particles are embedded into the bulk of carbon matrix. And the embedded structure could still meet the requirement of magnetic separation by an external magnetic field.

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

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.6b02796 ◽

2017 ◽

Vol 5 (12) ◽

pp. 11226-11237 ◽

Cited By ~ 10

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

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Coffee residue-based activated carbons for phenol removal

Water Practice & Technology ◽

10.2166/wpt.2021.034 ◽

2021 ◽

Author(s):

Hemavathy Palanisami ◽

Mohamad Rafiuddin Mohd Azmi ◽

Muhammad Abbas Ahmad Zaini ◽

Zainul Akmar Zakaria ◽

Muhd Nazrul Hisham Zainal Alam ◽

...

Keyword(s):

Activated Carbon ◽

Surface Area ◽

Functional Groups ◽

High Performance ◽

Activated Carbons ◽

Phenol Removal ◽

Surface Functional Groups ◽

Maximum Capacity ◽

Second Stage ◽

Adsorptive Properties

Abstract This work was aimed to evaluate the adsorptive properties of activated carbons from coffee residue for phenol removal. The coffee residue was activated using H3PO4 and KOH, and the resultant activated carbons were characterized for surface area and functional groups. The values of surface area were recorded as 1,030 m2/g and 399 m2/g for H3PO4- and KOH-activated carbons, respectively. The maximum capacity for phenol removal is comparable for both activated carbons at 43 mg/g. The pores might be inaccessible due to electrostatic repulsion by surface functional groups and hydroxyl anions. The second stage in a two-stage adsorber design is necessary to accomplish the process with high performance and minimum dosage of activated carbon. Coffee residue is a promising activated carbon precursor for phenol removal.

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