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

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.

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

Polymers ◽  
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.

scholarly journals Preparation of phosphorus-doped boron nitride and its adsorption of heavy metals from flue gas

2020 ◽  
Vol 7 (8) ◽  
pp. 200079
Author(s):  
Yanlong Li ◽  
Hongxi Li ◽  
Rundong Li ◽  
Xin Su ◽  
Shengqiang Shen
Keyword(s):  
Heavy Metals ◽  
Boron Nitride ◽  
Specific Surface ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Specific Surface Area ◽  
Flue Gas ◽  
Maximum Adsorption Capacity ◽  
Addition Rate ◽  
Phosphorus Doped

Boron nitride, also known as white graphene, has attracted extensive attention in the fields of adsorption, catalysis and hydrogen storage due to its excellent chemical properties. In this study, a phosphorus-doped boron nitride (P-BN) material was successfully prepared using red phosphorus as a dopant for the preparation of porous boron nitride precursors. The phosphorus content in the P-BN was adjusted based on the addition rate of phosphorus. The specific surface area of P-BN first increased and then decreased with increasing addition rate of phosphorus. The maximum specific surface area was 837.8 m 2 g −1 when the phosphorus addition rate was 0.50. The P-BN prepared in the experiments was used as an adsorbent, and its adsorption capacity for heavy metals from flue gas was investigated. In particular, P-BN presented a stronger adsorption selectivity for zinc compared with other heavy metals, and its adsorption capacity for zinc was 5–38 times higher than for other heavy metals. The maximum adsorption capacity of P-BN for zinc and copper in a single heavy metal atmosphere was 69.45 and 53.80 mg g −1 , respectively.

scholarly journals Ni-Carbon Mineral Sorbent - Catalyst of Sulfur Dioxide Sorption

2017 ◽  
Vol 3 (2) ◽  
pp. 119
Author(s):  
R.M. Mansurova ◽  
A.K. Umbetkaliev ◽  
N.K. Zhylybaeva ◽  
N. Erezhep ◽  
K. Dosumov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Sulfur Dioxide ◽  
Specific Surface ◽  
Adsorption Capacity ◽  
Raw Material ◽  
Mineral Raw Material ◽  
Morphology And Structure ◽  
Mineral Sorbent ◽  
Physical And Chemical ◽  
Sorption Characteristics

The morphology and structure of Ni-carbon mineral sorbent-catalysts on the basis of local mineral raw material were studied by methods of thermoprogrammed desorption and electron microscopy. The specific<br />surface, filamentary carbon diameter sizes and sorption characteristics of sulfur dioxide adsorption were determined. It was shown that the adsorption capacity of carboncontaining sorbents is influenced by: nature of metals of varying valence, specific surface and density of patterns. Physical and chemical sorption of sulfur dioxide was shown experimentally.

scholarly journals Fabrication of porous composites based on alginate to improve the adsorption capacity of Ni(II)

2021 ◽  
Vol 63 (11) ◽  
pp. 80-84
Author(s):  
Xuan Minh Vu ◽  
◽  
Thi Lan Pham ◽  
Thi My Hanh Le ◽  
Tuan Dung Nguyen ◽  
...  
Keyword(s):  
Specific Surface ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Specific Surface Area ◽  
Calcium Alginate ◽  
Alginate Bead ◽  
Maximum Adsorption Capacity ◽  
Porous Composite ◽  
Calcium Alginate Bead ◽  
Removal Of Heavy Metals

Calcium alginate bead (CAB) is a good adsorbent of heavy metal ions; however, CAB has a small specific surface area, limiting its applications in the removal of heavy metals in water treatment. In this study, alginate is denatured with activated carbon and surfactants to increase the porosity of the material and improve the adsorption capacity of the Ni(II) ion. Initial undenatured calcium alginate bead is almost no pores and a very small specific surface area (~0.04 m2/g). After modification, the porous composite made from alginate combined with active carbon and surfactant (P-CAB) has a large specific surface area ~160 m2/g, 4,000 times higher than CAB. The results of the Ni(II) ion adsorption study also showed that the maximum adsorption capacity of porous composite (qmax of 53.76 mg/g) significantly improved by 8.3 times than the adsorption capacity of CAB (6.48 mg/g).

scholarly journals REMOVAL OF Cd(II) FROM WATER BY USING GRAPHENE OXIDE–MnFe2O4 MAGNETIC NANOHYBRIDS

2018 ◽  
Vol 55 (1B) ◽  
pp. 109 ◽  
Author(s):  
Nguyen Huu Hieu
Keyword(s):  
Graphene Oxide ◽  
Specific Surface ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Specific Surface Area ◽  
Contaminated Water ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Fast Kinetics ◽  
Magnetic Nanohybrids

In this work, graphene oxide–manganese ferrite (GO–MnFe2O4) magnetic nanohybrids were synthesized by co–precipitation technique. The adsorption properties of GO–MnFe2O4 for efficient removal of Cd(II) from contaminated water were investigated. The nanohybrids were characterized by using X–ray diffraction, Fourier transform infrared spectroscopy, Brunauer–Emmett–Teller specific surface area (BET), transmission electron microscopy, and vibrating sample magnetometry (VSM). VSM result showed the high saturation magnetization values Ms = 27.1 emu/g, the BET specific surface area was 84.236 m2/g. Adsorption experiments were carried out to evaluate the adsorption capacity of the GO–MnFe2O4 magnetic nanohybrids and compared with MnFe2O4 nanoparticles and GO nanosheets. The equilibrium time for adsorption of Cd(II) onto the nanohybrids was 240 minutes. Experimental adsorption data were well–fitted to the Langmuir isotherm and the pseudo–second–order kinetic equation. The experimental results showed that adsorption of Cd(II) using GO–MnFe2O4 magnetic nanohybrids was better than MnFe2O4 and GO with a maximum adsorption capacity of 121.951 mg/g at pH 8.  Reusability, ease of magnetic separation, high removal capacity, and fast kinetics lead the GO–MnFe2O4 nanohybrids to be promising adsorbents for removal heavy metals from contaminated water.

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

2021 ◽  
Author(s):  
Yingjie Xu ◽  
Qi Zhang ◽  
Guiyu Jiang ◽  
Hongying Xia ◽  
Wuchen Cai ◽  
...  
Keyword(s):  
Composite Material ◽  
Adsorption Capacity ◽  
Uv Light ◽  
Removal Rate ◽  
Crystal Form ◽  
Band Gap Energy ◽  
Maximum Adsorption Capacity ◽  
Microwave Method ◽  
Preparation Methods ◽  
Characterization Methods

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.

scholarly journals Adsorption and Photodegradation of Cationic and Anionic Dyes by TiO2-Chitosan Nanocomposite

2019 ◽  
Vol 19 (2) ◽  
pp. 441
Author(s):  
Imelda Fajriati ◽  
Mudasir Mudasir ◽  
Endang Tri Wahyuni
Keyword(s):  
Specific Surface ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Specific Surface Area ◽  
Maximum Adsorption Capacity ◽  
Anionic Dyes ◽  
Anionic Dye ◽  
Reaction Constant ◽  
Kinetics Of

The adsorption and photodegradation of cationic and anionic dyes by TiO2-chitosan nanocomposites have been studied. This study investigated the specific surface area, pores volume, pores size of TiO2-Chitosan nanocomposite, and determination kinetics of the reaction on the adsorption and photodegradation process. The methods were carried out by mixing TiO2-nanocomposite into cationic and anionic dyes in various contact times and initial dye concentrations. The results showed that nanocomposite adsorption capacity increased with an increase in the amount of chitosan (TiO2/Chit 0.13) even though the specific surface area (SBET) was reduced. The results indicated that the adsorption on nanocomposite was influenced by the amount of -NH2 and -OH on the chitosan surface. The maximum adsorption capacity (qm) and the observed reaction constant (kObs) for MO were also known to be higher than MB, which means that the TiO2-chitosan nanocomposites could remove anionic dye more than cationic one.

scholarly journals THE INFLUENCE OF MINERALOGICAL COMPOSITION ON THE ADSORPTION CAPACITY OF HEAVY METALS SOLUTION BY JAVA NATURAL CLAY, INDONESIA

2021 ◽  
Vol 11 (2) ◽  
pp. 64-76
Author(s):  
Wawan Budianta
Keyword(s):  
Heavy Metal ◽  
Specific Surface ◽  
Cation Exchange ◽  
Adsorption Capacity ◽  
Surface Area ◽  
Specific Surface Area ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Maximum Adsorption Capacity ◽  
Equilibrium Test

The adsorption capacity of four clay samples (Boyolali-BYL, Sleman-SLM, Gunungkidul-GK, and Pacitan-PCT) from Java, Indonesia, for copper (Cu) lead (Pb), zinc (Zn) and cadmium (Cd) solution was investigated by using batch equilibrium test. The adsorption data were presented using an isotherm curve, and adjusted to the Langmuir equation model, which produced the maximum adsorption capacity of the clay samples. The physical, chemical, and mineralogical analysis showed that the BYL and PCT samples have higher montmorillonite content, cation exchange capacity (CEC), and specific surface area (SSA) compared to SLM and GK clay samples. The batch equilibrium test revealed that the clay samples with higher montmorillonite content produced higher heavy metal adsorption capacity due to the higher cation exchange capacity (CEC), and specific surface area (SSA). The batch equilibrium test also show that the adsorption order for the metals cations followed the selectivity order Cu2+ > Pb2+ > Zn2+ >Cd2+. The Langmuir model resulted in the adsorption processes, offering maximum adsorption capacities from 196.08 to 769.23 mg/g for Cu, 217.39 to 416.67 mg/g for Pb, 106.38 to 114.94 mg/g for Zn and 104.17 to 113.24 mg/g for Cd of four clay samples studied. The highest adsorption capacity was achieved for the BYL sample. The lowest was the GK sample, in which the order of the maximum adsorption capacity of clay samples was BYL > PCT > SLM > GK sample. This research indicated that the proportion of montmorillonite content in the clay samples affected the maximum adsorption capacity of the heavy metal in the solution.

Utilization of Waste of Enzymes Biomass as Biosorbent for the Removal of Dyes from Aqueous Solution in Batch and Fluidized Bed Column

2020 ◽  
Vol 71 (1) ◽  
pp. 1-12
Author(s):  
Salman H. Abbas ◽  
Younis M. Younis ◽  
Mohammed K. Hussain ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solution ◽  
Particle Size ◽  
Adsorption Capacity ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Fungal Biomass ◽  
Solution Flow Rate ◽  
Maximum Adsorption Capacity ◽  
Solution Flow

The biosorption performance of both batch and liquid-solid fluidized bed operations of dead fungal biomass type (Agaricusbisporus ) for removal of methylene blue from aqueous solution was investigated. In batch system, the adsorption capacity and removal efficiency of dead fungal biomass were evaluated. In fluidized bed system, the experiments were conducted to study the effects of important parameters such as particle size (701-1400�m), initial dye concentration(10-100 mg/L), bed depth (5-15 cm) and solution flow rate (5-20 ml/min) on breakthrough curves. In batch method, the experimental data was modeled using several models (Langmuir,Freundlich, Temkin and Dubinin-Radushkviechmodels) to study equilibrium isotherms, the experimental data followed Langmuir model and the results showed that the maximum adsorption capacity obtained was (28.90, 24.15, 21.23 mg/g) at mean particle size (0.786, 0.935, 1.280 mm) respectively. In Fluidized-bed method, the results show that the total ion uptake and the overall capacity will be decreased with increasing flow rate and increased with increasing initial concentrations, bed depth and decreasing particle size.

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