Activated Carbon Loaded Ti3+ Self-Doped TiO2 Composite Material Was Prepared By Microwave Method and Degradation of Rhodamine B Under UV-Light

Abstract In this work, the AC loaded Ti3+ self-doped TiO2 composite material was synthesized by the microwave method. Through XRD, XPS, SEM, RT-IR, UV-vis and other characterization methods to analyze the crystallinity, valence, morphology and other properties of the composite material. There is a synergistic effect between AC and TiO2, C—O—Ti and O—Ti—C bonds are formed between them. And promote the formation of anatase, make TiO2 form a mixed crystal form, and improve the efficiency of electron-hole separation. The doping of Ti3+ produces the Jahn-Teller effect, which reduces the band gap energy of the composite material to 2.2~2.4eV. The adsorption-catalysis experiment showed that the TiO2/Ti3+/AC composite prepared under microwave conditions has a removal rate of more than 96% for Rh-B, and the removal rate of pure TiO2/Ti3+ is only 50.44%. In addition, the effects of different preparation methods on the removal rate of Rh-B were compared. And it was found that the maximum removal rate of composite materials prepared under conventional conditions was 90.58%, which was significantly lower than the efficiency under microwave conditions. At the same time, the change in the adsorption capacity of AC was explored, and it was found that the saturated adsorption capacity of the 283K composite material was 161.67mg/g. When the temperature was 323K, the maximum adsorption capacity was 250.93mg/g, and the pure AC was only 115.47mg/g. Therefore, the composite material prepared by the microwave method can be regarded as an efficient and economical material for wastewater treatment.

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Characterizing Bacterial Cellulose Produced byKomagataeibacter sucrofermentans H-110 on Molasses Medium and Obtaining a Biocomposite Based on It for the Adsorption of Fluoride

Polymers ◽

10.3390/polym13091422 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1422

Author(s):

Viktor V. Revin ◽

Alexander V. Dolganov ◽

Elena V. Liyaskina ◽

Natalia B. Nazarova ◽

Anastasia V. Balandina ◽

...

Keyword(s):

Composite Material ◽

Adsorption Capacity ◽

Bacterial Cellulose ◽

Functional Materials ◽

Degree Of Crystallinity ◽

Maximum Adsorption Capacity ◽

Fluoride Ions ◽

Sorption Ability ◽

Wide Range ◽

Biocomposite Material

Currently, there is an increased demand for biodegradable materials in society due to growing environmental problems. Special attention is paid to bacterial cellulose, which, due to its unique properties, has great prospects for obtaining functional materials for a wide range of applications, including adsorbents. In this regard, the aim of this study was to obtain a biocomposite material with adsorption properties in relation to fluoride ions based on bacterial cellulose using a highly productive strain of Komagataeibacter sucrofermentans H-110 on molasses medium. Films of bacterial cellulose were obtained. Their structure and properties were investigated by FTIR spectroscopy, NMR, atomic force microscopy, scanning electron microscopy, and X-ray structural analysis. The results show that the fiber thickness of the bacterial cellulose formed by the K. sucrofermentans H-110 strain on molasses medium was 60–90 nm. The degree of crystallinity of bacterial cellulose formed on the medium was higher than on standard Hestrin and Schramm medium and amounted to 83.02%. A new biocomposite material was obtained based on bacterial cellulose chemically immobilized on its surface using atomic-layer deposition of nanosized aluminum oxide films. The composite material has high sorption ability to remove fluoride ions from an aqueous medium. The maximum adsorption capacity of the composite is 80.1 mg/g (F/composite). The obtained composite material has the highest adsorption capacity of fluoride from water in comparison with other sorbents. The results prove the potential of bacterial cellulose-based biocomposites as highly effective sorbents for fluoride.

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The Adsorption and Desorption Characteristics of a Novel Sorbent in Groundwater Remediation: Modified Oil Sludge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.599.412 ◽

2012 ◽

Vol 599 ◽

pp. 412-417 ◽

Cited By ~ 5

Author(s):

Yue Hua Li ◽

Yu Long Liu ◽

Hao Deng ◽

Suo Lei Zhang

Keyword(s):

Adsorption Capacity ◽

Organic Contaminants ◽

Groundwater Remediation ◽

Water Solubility ◽

Removal Rate ◽

High Water ◽

Oil Sludge ◽

Maximum Adsorption Capacity ◽

Adsorption And Desorption ◽

Batch Type

The modified oil sludge (MOS) was a novel sorbent in groundwater remediation, and it has a carbon content of 37-50% and a huge adsorption capacity after its pyrolytic treatment. This study highlights the adsorption potential of MOS to remove organic contaminants in groundwater. Batch-type experiments about the adsorption and desorption characteristics of MOS to MTBE, TCE and benzene were conducted. Results showed that the adsorption removal rate of TCE and benzene were up to 99%, and was lower for MTBE (88-93%) due to its high water solubility, but the maximum adsorption capacity of MOS to MTBE was still larger (14.3-33.3 mg/g). The desorption quantities of TCE and benzene was 0.4% and 1%, respectively; but was larger for MTBE (10%), and similar trend was also found for the desorption hysteresis coefficient.

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Synthesis and Characterization of Zeolite X Obtained from Coal Gangue for Adsorption of Cu2+

Science of Advanced Materials ◽

10.1166/sam.2021.4024 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1512-1520

Author(s):

MiaoSen Zhang ◽

SiYang Wang ◽

Zheng Hu ◽

RunZe Zhang ◽

XiaoLi Wang

Keyword(s):

Adsorption Capacity ◽

Adsorption Kinetics ◽

Ph Value ◽

Copper Ions ◽

Removal Rate ◽

Coal Gangue ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Zeolite X ◽

Initial Ph

China is a big coal producing country, there are a lot of coal gangue piled up. The zeolite X was synthesized by alkali melting and hydrothermal method based on the coal gangue from Chifeng city, Inner Mongolia. The obtained zeolite X sample is characterized by X-ray diffraction, SEM, EDS spectrum and IR which showed the X zeolite is an octahedral structure with complete crystal shape and uniform grain size. The results of BET showed the specific surface area of zeolite X is 354.8 m2/g and the minimum pore size is 3.8 nm which indicated that the zeolite X belongs to mesoporous materials. The adsorption conditions of the zeolite X adsorbent on copper ions were optimized. A solution containing Cu2+ ions with an initial concentration of 300 mg/L was added to the zeolite X with a dosage of 0.1 g and the initial pH value of the solution was adjusted to 6. Then the solution was oscillated for 120 min at 225 r/min. The maximum adsorption capacity and removal rate were 148.6 mg/g and 99.1%, respectively. The adsorption mechanism was discussed by adsorption kinetics and thermodynamics. The quasi-second order kinetic equation can be well used to describe the adsorption kinetics of zeolite X to Cu2+ (R2 = 0.9994) and Langmuir can well describe the adsorption behavior of zeolite X to Cu2+ (R2 = 0.9995) which showed the adsorption is a monolayer of chemical adsorption. The adsorption capacity of zeolite X to Cu2+ is about 4.0 times that of coal gangue, indicating that the zeolite X has good adsorption capacity.

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Development of ion-imprinted cryogels for selective removal of arsenic from environmental waters

Biointerface Research in Applied Chemistry ◽

10.33263/briac94.119125 ◽

2019 ◽

Vol 9 (4) ◽

pp. 4119-4125

Keyword(s):

Adsorption Capacity ◽

Arsenic Removal ◽

Removal Rate ◽

Anthropogenic Activities ◽

Arsenic Concentration ◽

Environmental Water ◽

Maximum Adsorption Capacity ◽

Environmental Waters ◽

Ion Imprinted ◽

Removal Of Arsenic

Arsenic present by nature as metalloid, having transportability in the environment via diverse sources. Because of both natural processes and anthropogenic activities, arsenic is found in environmental water sources. The aim of this study is to design ion-imprinting-based cryogel adsorbents for the removal of arsenic species from environmental waters. Since trivalent arsenic exhibit a high afgfinity for sulfhydryl groups, cysteine-based functional monomer, i.e. MAC, was synthesized and MAC–As(III) complex was prepared. Ionimprinted polymeric adsorbents were fabricated via cryopolymerization. Elemental analysis studies have shown that the cryogel monolith contains 192.8 μmol/g mol MAC/g polymer. The maximum adsorption capacity of ion-imprinted cryogels at an initial arsenic concentration of 10 ppm was found to be 372.5 μg/g at pH 8.0. Arsenic removal rate of the imprinted cryogels from environmental water sample was determined as 94.8% In the studies carried out for the removal of arsenic from the environmental waters, 94.8% removal efficiency was achieved. Reusability assays of ion-imprinted cryogels were performed and there was no significant decrease in adsorption capacity.

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Preparation of submicron ion-exchange fibers and application in copper ions removal from aqueous solutions

e-Polymers ◽

10.1515/epoly.2010.10.1.160 ◽

2010 ◽

Vol 10 (1) ◽

Cited By ~ 2

Author(s):

Shuqin Feng ◽

Xinyuan Shen

Keyword(s):

Ion Exchange ◽

Adsorption Capacity ◽

Copper Ions ◽

Removal Rate ◽

Toxic Metal ◽

Adsorption Rate ◽

Maximum Adsorption Capacity ◽

High Porosity ◽

Spectroscopy Analysis ◽

Sem Images

AbstractThe submicron ion-exchange fibers (IEF) of polystyrene (PS) and styrene-isoprene-styrene block copolymer (SIS) blends (80/20, w/w) obtained by electrospinning technology were further sulfonated with sulfuric acid to produce strong acidic cation ion exchange fibers. Scanning electron microscopy (SEM) images showed that there were obvious increase in the diameters, scratches, cracks, and micro-pores on the rough IEF surface. Fourier transform infrared (FTIR) spectroscopy analysis showed there were many sulfonated acid groups introduced onto the benzene wreath of styrene. The maximum adsorption capacity and the adsorption rate of copper ions were carried out and their removal rate determined by spectrophotometry. The results of the adsorption for copper ions showed that submicron IEF from PS/SIS blends with a high porosity (85%) and a high specific surface (760 m2/g) possess a rapid adsorption rate and a high ion adsorption amount (305.9 mmg/g). This high adsorption capacity suggests that the IEF can be efficiently applied to filter out toxic metal ions, and has excellent efficiency to remove copper ions from aqueous solution.

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Preparation of Polyaniline/Emulsion Microsphere Composite for Efficient Adsorption of Organic Dyes

Polymers ◽

10.3390/polym12010167 ◽

2020 ◽

Vol 12 (1) ◽

pp. 167 ◽

Cited By ~ 6

Author(s):

Yuanli Liu ◽

Liushuo Song ◽

Linlin Du ◽

Peng Gao ◽

Nuo Liang ◽

...

Keyword(s):

Adsorption Capacity ◽

In Situ Polymerization ◽

Organic Dyes ◽

Removal Rate ◽

Three Dimensional ◽

Maximum Adsorption Capacity ◽

Adsorption Selectivity ◽

Polymeric Microspheres ◽

Pseudo Second Order ◽

Adsorption Desorption

Surface-functionalized polymeric microspheres have wide applications in various areas. Herein, monodisperse poly(styrene–methyl methacrylate–acrylic acid) (PSMA) microspheres were prepared via emulsion polymerization. Polyaniline (PANI) was then coated on the PSMA surface via in situ polymerization, and a three-dimensional (3D) structured reticulate PANI/PSMA composite was, thus, obtained. The adsorption performance of the composite for organic dyes under different circumstances and the adsorption mechanism were studied. The obtained PANI/PSMA composite exhibited a high adsorption rate and adsorption capacity, as well as good adsorption selectivity toward methyl orange (MO). The adsorption process followed pseudo-second-order kinetics and the Langmuir isotherm. The maximum adsorption capacity for MO was 147.93 mg/g. After five cycles of adsorption–desorption, the removal rate remained higher than 90%, which indicated that the adsorbent has great recyclability. The adsorbent materials presented herein would be highly valuable for the removal of organic dyes from wastewater.

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Facile preparation and highly efficient sorption of magnetic composite graphene oxide/Fe3O4/GC for uranium removal

Scientific Reports ◽

10.1038/s41598-021-86768-0 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Aili Yang ◽

Zhijun Wang ◽

Yukuan Zhu

Keyword(s):

Aqueous Solution ◽

Graphene Oxide ◽

Adsorption Capacity ◽

High Efficiency ◽

Removal Rate ◽

Low Cost ◽

Hydrothermal Carbonization ◽

Maximum Adsorption Capacity ◽

Magnetic Composite ◽

Order Kinetic

AbstractIn this work, we reported for the first time a novel magnetic composite graphene oxide/Fe3O4/glucose-COOH (GO/Fe3O4/GC) that was facilely prepared from glucose through the hydrothermal carbonization and further combination with graphene oxide (GO). The chemical and structural properties of the samples were investigated. By the batch uranium adsorption experiments, the magnetic composite GO/Fe3O4/GC exhibits an excellent adsorption performance and fast solid–liquid separation for uranium from aqueous solution. GO/Fe3O4/GC (the maximum adsorption capacity (Qm) was 390.70 mg g−1) exhibited excellent adsorption capacity and higher removal rate (> 99%) for U(VI) than those of glucose-COOH (GC) and magnetic GC (MGC). The effect of the coexisting ions, such as Na+, K+, Mg2+, Ca2+, and Al3+, on the U(VI) removal efficiency of GO/Fe3O4/GC was examined. The equilibrium sorption and sorption rate for the as-prepared adsorbents well fit the Langmuir model and pseudo second-order kinetic model, respectively. The thermodynamic parameters (ΔH0 = 11.57 kJ mol−1 and ΔG0 < 0) for GO/Fe3O4/GC indicate that the sorption process of U(VI) was exothermic and spontaneous. Thus, this research provides a facile strategy for the preparation of the magnetic composite with low cost, high efficiency and fast separation for the U(VI) removal from aqueous solution.

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Analysis of the physicochemical and sorption characteristics of composites based on zeolite and chamotte clay

MATEC Web of Conferences ◽

10.1051/matecconf/202134001027 ◽

2021 ◽

Vol 340 ◽

pp. 01027

Author(s):

Zarina Baranchiyeva ◽

Gulziya Seilkhanova ◽

Akmaral Rakhym

Keyword(s):

Composite Material ◽

Specific Surface ◽

Adsorption Capacity ◽

Structural Characteristics ◽

Quantitative Composition ◽

Maximum Adsorption Capacity ◽

Sorption Activity ◽

Qualitative And Quantitative ◽

Active Centres ◽

Sorption Characteristics

Clays and aluminosilicate materials are known as effective sorbents for purification of wastewater from various types of contaminants. Some properties and sorption activity of materials based on the zeolite of Shankanai deposit and Chamotte clay towards Cd2+ ions were analyzed in the present work. The structural characteristics of the studied objects, their qualitative and quantitative composition were determined by the SEM and EDAX methods. It was found that maximum adsorption capacity (qe) of the initial zeolite for extraction Cd2+ ions is (7.3±0.11) mg/g, while for Chamotte clay this value equals to (5.3±0.12) mg/g. After modification with polyvinylpyrrolidone, qe increased to (10.1±0.08) mg/g for zeolite, and (8.5±0.15) mg/g for Chamotte clay. Developed specific surface of the composite material (sorbent) and complexation with the active centres of thepolymer couldbe a resultof Cd2+ ions binding.

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Composite Polymeric Cryogel Cartridges for Selective Removal of Cadmium Ions from Aqueous Solutions

Polymers ◽

10.3390/polym12051149 ◽

2020 ◽

Vol 12 (5) ◽

pp. 1149 ◽

Cited By ~ 3

Author(s):

Sabina Huseynli ◽

Monireh Bakhshpour ◽

Tahira Qureshi ◽

Muge Andac ◽

Adil Denizli

Keyword(s):

Aqueous Solutions ◽

Removal Rate ◽

Synthetic Wastewater ◽

Maximum Adsorption Capacity ◽

Functional Monomer ◽

Hydroxyethyl Methacrylate ◽

Characterization Methods ◽

Ph Values ◽

Adsorption Capacities ◽

Wastewater Samples

In this study, composite polymeric cryogel cartridges were achieved by using Cd(II) imprinted poly(hydroxyethyl methacrylate N-methacryloly-(L)-cysteine methylester) beads and poly(hydroxyethyl methacrylate) cryogel cartridges with two different mole ratios of functional monomer. The N-methacryloly-(L)-cysteinemethylester was used as a functional monomer and Cd(II) 1:1 and 2:1, which were then notated as MIP1 and MIP2, respectively. Various characterization methods have confirmed the structural transformation on the MIP1 and MIP2 composite cryogel cartridges by scanning electron microscopy, Fourier-transform infrared spectroscopy-Attenuated Total Reflectance, and swelling tests. The maximum amount of Cd(II) adsorption with composite cryogel cartridges was determined by altering the Cd(II) initial concentration, temperature, and pH values. The maximum adsorption capacity of MIP1 and MIP2 composite cryogel cartridges obtained was 76.35 and 98.8 µmol/g of composite cryogels, respectively. The adsorption studies revealed that the MIP2 possessed a good adsorption performance for Cd(II). The obtained composite cryogel cartridges have a selective, reusable, and cost-friendly potential for the removal of Cd(II) from aqueous solutions, and are used many times without decreasing their adsorption capacities significantly. The Cd(II) removal rate of the MIP1 and MIP2 composite cryogel cartridges from synthetic wastewater samples was determined as 98.8%. The obtained cryogel cartridges’ adsorption material exhibited a good directional removal performance for Cd(II) from wastewater samples.

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Facile Preparation and Highly Efficient Sorption of Magnetic Composite Graphene Oxide/Fe3O4/GC for Uranium Removal

10.21203/rs.3.rs-150676/v1 ◽

2021 ◽

Author(s):

Aili Yang ◽

Zhijun Wang ◽

Yukuan Zhu

Keyword(s):

Aqueous Solution ◽

Graphene Oxide ◽

Adsorption Capacity ◽

High Efficiency ◽

Removal Rate ◽

Low Cost ◽

Hydrothermal Carbonization ◽

Maximum Adsorption Capacity ◽

Magnetic Composite ◽

Order Kinetic

Abstract In this work, we reported for the first time a novel magnetic composite graphene oxide/Fe3O4/glucose-COOH (GO/Fe3O4/GC) that was facilely prepared from glucose through the hydrothermal carbonization and further combination with graphene oxide (GO). The chemical and structural properties of the samples were investigated. By the batch uranium adsorption experiments, the magnetic composite GO/Fe3O4/GC exhibits an excellent adsorption performance and fast solid-liquid separation for uranium from aqueous solution. GO/Fe3O4/GC (the maximum adsorption capacity (Qm) was 390.70 mg g-1) exhibited excellent adsorption capacity and higher removal rate (> 99%) for U(VI) than those of glucose-COOH (GC) and magnetic GC (MGC). The effect of the coexisting ions, such as Na+, K+, Mg2+, Ca2+, and Al3+, on the U(VI) removal efficiency of GO/Fe3O4/GC was examined. The equilibrium sorption and sorption rate for the as-prepared adsorbents well fit the Langmuir model and pseudo second-order kinetic model, respectively. The thermodynamic parameters (ΔH0 = 11.57 kJ mol-1 and ΔG0 < 0) for GO/Fe3O4/GC indicate that the sorption process of U(VI) was exothermic and spontaneous. Thus, this research provides a facile strategy for the preparation of the magnetic composite with low cost, high efficiency and fast separation for the U(VI) removal from aqueous solution.

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