STRUCTURE AND SORPTION PROPERTIES OF POROUS CARBON SORBENTS FROM ASPEN BARK

2019 ◽  
pp. 325-333
Author(s):  
Evgeniya Vladimirovna Veprikova ◽  
Ivan Petrovich Ivanov ◽  
Nikolay Vasil'yevich Chesnokov ◽  
Boris Nikolayevich Kuznetsov
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Vitamin B12 ◽  
Porous Structure ◽  
Sorption Capacity ◽  
Sorption Properties ◽  
High Rate ◽  
Effect Of Temperature ◽  
Carbon Sorbents ◽  
Structure And Sorption Properties

The effect of temperature of aspen bark pre-carbonization on evolution of a porous structure and sorption properties of the carbon sorbents prepared in results of thermo alkaline activation of carbonizats with hydroxide potassium was studied.  The relationship of a sorption of methylene blue and vitamin B12 by the sorbents from aspen bark to a volume and size of pores was established. It was shown, that the carbon sorbents capacity at а methylene blue are defined by pores with width 0.86–2.95 nm, and at a vitamin B12 – 3.18–6.89 nm. Comparation of the porous structures parameters and sorption properties of the carbon sorbents from aspen bark and commercial activated carbon for medical purposes was maked. Kinetic of markers sorption onto sorbents with different porous structure was studied and the corresponding rate constants were calculated. The possibility preparation of a carbon sorbent have high rate of vitamin B12 sorption (rate constant is 3.953 min–1) was shown.  The determinations of a sorption capacity of sorbents in conditions assume at enterosorbents test were carry out. It was determined, that sorbents, prepped from aspen bark, exceeds the sample of industrial activated carbon for medical purposes at sorption capacity of methylene blue and vitamin B12 in 1.7 and 1.5 time, correspondingly.

scholarly journals STRUCTURE AND SORPTION PROPERTIES OF ACTIVATED CARBON BASED ON PINE BARK CARBONIZATS

2020 ◽  
pp. 289-296
Author(s):  
Evgeniya Vladimirovna Veprikova ◽  
Ivan Petrovich Ivanov
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Specific Surface ◽  
Activated Carbons ◽  
Sorption Properties ◽  
Pine Bark ◽  
Effect Of Temperature ◽  
Structure And Sorption Properties ◽  
Maximal Sorption Capacity ◽  
Carbon Based

The dates about effect of temperature of carbonizats obtaining from pine bark on evolution of a porous structure and sorption properties of the activated carbons, synthesized by the method of thermoalkaline activation in the presence of КОН were presented. It was determined, that for preparation of activated carbons with the greatest specific surface (1421 and 1655 m2/g) and micropores volume (0.58 и 0.71 sm3/g) pine bark carbonizats reasonable to obtain at temperature 300 and 400 °С correspondingly. The correlation of a iodine sorption with volume of micropores width 0.73–3.0 nm (R2=0.964) and a methylene blue sorption with volume of micropores width 0.84–2.0 nm (R2=0.995), which present in the activated carbons structure, was established. It was shown, that low capacity of the activated carbons to vitamin B12 sorption determine by low mesopores volume with width ≥5 nm (no more than 0.0014 sm3/g). It was shown, that the activated carbon based on carbonizat obtained at 400 °С demonstrates a maximal sorption capacity to a iodine and a methylene blue (1.57 g/g и 697.1 mg/g correspondingly), that in 1.4 and 2.7 times exceeds the dates of an industrial activated carbon for medical purposes.

scholarly journals Effect of Conditions of Carbon Sorbents Producing from Abies Bark on Their Structure and Sorption Properties

2019 ◽  
pp. 423-433
Author(s):  
Ivan P. Ivanov ◽  
Evgeniya V. Veprikova ◽  
Nikolai V. Chesnokov
Keyword(s):  
Methylene Blue ◽  
Vitamin B12 ◽  
Sorption Properties ◽  
Commercial Sample ◽  
Carbon Sorbents ◽  
Alkaline Activation ◽  
Marker Substances ◽  
Active Coal ◽  
High Sorption ◽  
Structure And Sorption Properties

The ability of producing of effective carbon sorbents from abies bark with the use of thermal alkaline activation in presence of potassium hydroxide was shown. The effects of ratio of bark to alkaline, and temperature of bark pre-carbonization on the porous structure and sorption properties of the carbon sorbents were studied. It was shown, that the capacity of carbon sorbents on iodine is defined by pores with a width 0,73–1,86 nm, on methylene blue – 0,86–2,95 nm, and on vitamin B12 – ≥ 9,31 nm. It was determined, that the carbon sorbent, producing by alkaline activation of product of abies bark carbonization at 400 °С, has a high sorption capacity for studied marker substances. For this sorbent kinetic of iodine, methylene blue and vitamin B12 sorption was studied in comparison with the simple of commercial active coal for medical purposes. It was determined, that this sorbent exceeds the commercial sample in sorption of iodine and vitamin B12 in 1,5 time, and at sorption of methylene blue – in 1.7 time, and it is characterized by a higher rate constants of their markers sorption

Porous structure and sorption properties of nitrogen-containing activated carbon

Fuel ◽  
2010 ◽  
Vol 89 (9) ◽  
pp. 2623-2627 ◽  
Author(s):  
Aryuna D. Budaeva ◽  
Evgeniy V. Zoltoev
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Sorption Properties ◽  
Structure And Sorption Properties

Transient, in situ synthesis of ultrafine ruthenium nanoparticles for a high-rate Li–CO2 battery

2019 ◽  
Vol 12 (3) ◽  
pp. 1100-1107 ◽  
Author(s):  
Yun Qiao ◽  
Shaomao Xu ◽  
Yang Liu ◽  
Jiaqi Dai ◽  
Hua Xie ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Carbon Nanofibers ◽  
In Situ Synthesis ◽  
High Rate ◽  
Ruthenium Nanoparticles ◽  
High Performing ◽  
Activated Carbon Nanofibers ◽  
Ru Nanoparticles

Ultrafine Ru nanoparticles anchored on freestanding activated carbon nanofibers with porous structure are synthesized as a high performing cathode for Li–CO2 batteries via a transient, in situ thermal shock method.

scholarly journals B, N-dual doped sisal-based multiscale porous carbon for high-rate supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 1476-1486 ◽  
Author(s):  
Heng Wu ◽  
Wenyu Yuan ◽  
Yingxin Zhao ◽  
Daoyang Han ◽  
Xiaowen Yuan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Porous Carbon ◽  
High Rate ◽  
Supercapacitor Electrode

B, N dual-doped sisal-based activated carbon (BN-SAC) with a multiscale porous structure for high-rate supercapacitor electrode was prepared through a novel and facile strategy.

A Study of Capillary Porous Structure and Sorption Properties of Nafion Proton‐Exchange Membranes Swollen in Water

1998 ◽  
Vol 145 (8) ◽  
pp. 2677-2683 ◽  
Author(s):  
J. Divisek ◽  
M. Eikerling ◽  
V. Mazin ◽  
H. Schmitz ◽  
U. Stimming ◽  
...  
Keyword(s):  
Porous Structure ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Sorption Properties ◽  
Structure And Sorption Properties

scholarly journals Sorption properties of composite materials with a core-shell structure containing layered double hydroxides in the shell

2020 ◽  
Vol 62 (4) ◽  
pp. 62-71
Author(s):  
Evgenia A. Tarasenko ◽  
◽  
Irina G. Ryltsova ◽  
Maksim N. Yapryntsev ◽  
Yevgenia Yu. Nakisko ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Composite Materials ◽  
Sorption Capacity ◽  
Shell Structure ◽  
Congo Red ◽  
Sorption Properties ◽  
Core Shell ◽  
Order Kinetic ◽  
Anionic Dyes ◽  
Core Shell Structure

The work is devoted to the study of the sorption properties of hierarchical composite materials with a core-shell structure. The composites contained a core of SiO2 or Fe3O4@SiO2 obtained by sol-gel synthesis, on the surface of which a layered double hydroxide (MgAlFe-LDH) was deposited. The phase composition of the obtained materials was determined, and the textural characteristics and particle morphology were studied. It was found that hierarchical materials had larger surface and demonstrated high sorption capacity towards both cationic and anionic dyes in aqueous solution in comparison with individual systems (SiO2 and MgAlFe-LDH). It was shown that the sorption equilibrium in the system “dye solution – sorbent” for dye methylene blue was achieved faster in comparison with Congo red. The obtained kinetic data were analyzed using chemical kinetic models. The sorption of both Congo red and methylene blue on composite materials was found to be described by a pseudo-second order kinetic equation. Isotherms of sorption of Congo red and methylene blue on synthesized materials were plotted. The sorption capacity of Fe3O4@SiO2@LDH and SiO2@LDH towards Congo red were 0.19 mmol/g and 0.27 mmol/g, respectively. In the case of sorption of methylene blue, the sorption isotherms did not reach a plateau in the studied concentration range. However, it can be noted that at an initial methylene blue concentration of 0.051 mmol/L the sorption capacity of Fe3O4@SiO2@LDH and SiO2@LDH were 0.040 mmol/g and 0.033 mmol/g, respectively. The obtained data indicate that hierarchical composite materials containing LDH in their composition are effective bifunctional sorbents and can uptake both anionic and cationic forms of pollutants from a solution. An advantage of the Fe3O4 core system is its ability to be easily separate from a solution under the influence of an external magnetic field. It is important that the Fe3O4@SiO2@LDH sample exhibits a typical superparamagnetic behavior with zero coercitivity and residual magnetic induction.

Sorption properties of iron impregnated activated carbon web for removal of methylene blue from aqueous media

2016 ◽  
Vol 17 (8) ◽  
pp. 1245-1255 ◽  
Author(s):  
Salman Naeem ◽  
Vijay Baheti ◽  
Jiri Militky ◽  
Jakub Wiener ◽  
Promoda Behera ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Aqueous Media ◽  
Sorption Properties

EFFECT OF TEMPERATURE FOR THE ADSORPTION OF METHYLENE BLUE ONTO ACTIVATED CARBON PRODUCED FROM WASTE DOGROSE SEEDS

2005 ◽  
pp. 277-284
Author(s):  
A. Gürses ◽  
C. Doğar ◽  
M. Açıkyıldız ◽  
E. Özkan ◽  
R. Bayrak
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Effect Of Temperature
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