Effect of temperature and ph on the adsorption of an anionic detergent on activated carbon

2007 ◽  
Vol 45 (3) ◽  
pp. 231-240 ◽  
Author(s):  
Roberto Leyva-Ramos
Keyword(s):  
Activated Carbon ◽  
Effect Of Temperature

Effect of temperature on composite films made with activated carbon, graphite, or graphene oxide (GO) in a gelatin matrix

BioResources ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 77-95
Author(s):  
Siqiao Yang ◽  
Haichao Li
Keyword(s):  
Contact Angle ◽  
Activated Carbon ◽  
Water Absorption ◽  
Composite Films ◽  
Effect Of Temperature ◽  
Gelatin Matrix ◽  
Vapour Permeability ◽  
Blending Method ◽  
The Matrix ◽  
Different Temperatures

Activated carbon, graphite, and GO/gelatin composite films were prepared by the blending method. The properties of composites were characterized by tensile strength (TS), elongation at break (EB), water vapour permeability (WVP), water-absorption ability, contact angle, scanning electron microscopy (SEM), and moisture at different temperatures. The properties of GO/gelatin composite films were better when each of three kinds of carbon materials were used as reinforcement phases and added into the matrix gelatin. The results showed that EB and TS of GO/gelatin composite films were both excellent. The moisture of GO/gelatin composite films was greater than the others. SEM micrographs showed that GO had better compatibility and dispersibility with gelatin than activated carbon and graphite. The water absorption of GO/gelatin composite films were low, at 15 °C and 25 °C, and the WVP was low at 35 °C. The WVP of GO/gelatin composite films was lower than the others at different temperatures. The contact angle of GO/gelatin composite films was larger than the others.

scholarly journals Effect of Salinity and PH on the Industrial Effluent Treatment by Activated Carbon: Modeling of the Kinetic Adsorption and Equilibrium Isotherms

2019 ◽  
Vol 8 (1) ◽  
pp. 77 ◽  
Author(s):  
E. F. Mohamed ◽  
G. Awad ◽  
C. Andriantsiferana ◽  
H. Delmas
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Organic Compounds ◽  
Inorganic Salt ◽  
Industrial Effluent ◽  
Effluent Treatment ◽  
Effect Of Temperature ◽  
Ambient Conditions ◽  
Solution Ph ◽  
Carbon Modeling

In recent years, interest has been focused on the removal of phenols from contaminated by using a variety of purification techniques. Adsorption of bio-industrial effluent on commercial activated carbon S23 was investigated at ambient conditions. In this wok, phenol and p-hydroxyl benzoic acid (PHBA) was studied as an example of the organic compounds present in the industrial effluent. The effect of temperature, pH, and the presence of inorganic salt NaCl on the pollutants adsorption were studied to give further comprehension of the optimal conditions of the organic compounds adsorption onto activated carbon. It was noted that the increase in temperature resulted in a decrease in phenols adsorption capacity by S23. Lower phenol adsorption was also observed at the solution pH 2 and 10, whereas, favourable adsorption was reached at neutral solution pH, and the coexisting inorganic salt NaCl exerts slightly positive effect on the adsorption process. The isotherms obtained at pH 2.2 and 3.5 (non-buffered solution) are very similar and showed a higher adsorption capacity compared with that obtained at pH 7 and 10 for PHBA which is more adsorbable than phenol. The kinetic of the adsorption processes can be better represented by the pseudo-second order. The results showed also that the total organic carbon (TOC) of the industrial effluent reduced for about 20 %. Freundlich, Langmuir and Jovanovic adsorption models were used for mathematical description of adsorption equilibrium of phenols. The results showed that the experimental data fitted very well to the Freundlich and Jovanovic models.

Equilibria and dynamics of liquid-phase trinitrotoluene adsorption on granular activated carbon: Effect of temperature and pH

2007 ◽  
Vol 141 (1) ◽  
pp. 185-192 ◽  
Author(s):  
Jae-Wook Lee ◽  
Tae-Hoon Yang ◽  
Wang-Geun Shim ◽  
Tae-Ouk Kwon ◽  
Il-Shik Moon
Keyword(s):  
Activated Carbon ◽  
Liquid Phase ◽  
Granular Activated Carbon ◽  
Effect Of Temperature

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 Potential Use of Waste Activated Sludge Hydrothermally Treated as a Renewable Fuel or Activated Carbon Precursor

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3534
Author(s):  
J. A. Villamil ◽  
E. Diaz ◽  
M. A. de la Rubia ◽  
A. F. Mohedano
Keyword(s):  
Activated Carbon ◽  
Activated Sludge ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Hydrothermal Carbonization ◽  
Effect Of Temperature ◽  
Waste Activated Sludge ◽  
Maximum Adsorption Capacity ◽  
Porous Network ◽  
Good Potential

In this work, dewatered waste activated sludge (DWAS) was subjected to hydrothermal carbonization to obtain hydrochars that can be used as renewable solid fuels or activated carbon precursors. A central composite rotatable design was used to analyze the effect of temperature (140–220 °C) and reaction time (0.5–4 h) on the physicochemical properties of the products. The hydrochars exhibited increased heating values (up to 22.3 MJ/kg) and their air-activation provided carbons with a low BET area (100 m2/g). By contrast, chemical activation with K2CO3, KOH, FeCl3 and ZnCl2 gave carbons with a well-developed porous network (BET areas of 410–1030 m2/g) and substantial contents in mesopores (0.079–0.271 cm3/g) and micropores (0.136–0.398 cm3/g). The chemically activated carbons had a fairly good potential to adsorb emerging pollutants such as sulfamethoxazole, antipyrine and desipramine from the liquid phase. This was especially the case with KOH-activated hydrochars, which exhibited a maximum adsorption capacity of 412, 198 and 146 mg/g, respectively, for the previous pollutants.

The effect of temperature, cyanide and base metals on the adsorption of Pt, Pd and Au onto activated carbon

2014 ◽  
Vol 149 ◽  
pp. 132-142 ◽  
Author(s):  
C.A. Snyders ◽  
S.M. Bradshaw ◽  
G. Akdogan ◽  
J.J. Eksteen
Keyword(s):  
Activated Carbon ◽  
Effect Of Temperature ◽  
Base Metals

scholarly journals Effect of the strong magnetic field on copper adsorption processes on activated carbon

2017 ◽  
Vol 8 (2) ◽  
pp. 7-10 ◽  
Author(s):  
Krzysztof Rajczykowski ◽  
Krzysztof Loska
Keyword(s):  
Magnetic Field ◽  
Activated Carbon ◽  
External Magnetic Field ◽  
Adsorption Process ◽  
Equilibrium Concentration ◽  
Process Efficiency ◽  
Effect Of Temperature ◽  
Copper Adsorption ◽  
Adsorption Processes ◽  
The Magnetic Field

In the presented studies an influence of the strong static magnetic field on the process of copper adsorption on activated carbon was analysed. The magnetic field was generated by the annular neodymium magnets, placed at the bottom of the glass reactors, with the magnetic induction value at the surface equal 0.517 T. Additionally, during the study an effect of temperature on the adsorption process efficiency and its susceptibility to the external magnetic field was also investigated. As a result of the study, it was found that using a magnetic modification can increase the efficiency of the adsorption process up to 80%. However, such a strong influence of the external magnetic field was observed only in the case of relatively low initial and equilibrium concentration of the adsorbate. With the increase of the equilibrium concentration, stimulating nature of the magnetic field weakened significantly until finally at an equilibrium concentration about 80 mg/dm3, it was almost negligible. In addition, it was also found that the magnetic field modifications were much more efficient if the adsorption processes were conducted at the higher temperature.

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 THE EFFECT OF TEMPERATURE ON THE PERFORMANCE OF ACTIVATED CARBON OVER CATALYTIC CRACKING OF CRUDE PALM OIL

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Nazarudin Nazarudin ◽  
Ulyarti Ulyarti ◽  
Oky Alfernando ◽  
Ira Galih ◽  
Susilawati Susilawati ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Palm Oil ◽  
Active Carbon ◽  
Catalytic Cracking ◽  
Effect Of Temperature ◽  
Crude Palm Oil ◽  
Carbon Catalyst ◽  
Different Temperatures ◽  
Higher Temperature ◽  
Catalyst Increase

This research was carried out to investigate the effect of temperature in carbon production on its performance in the catalystic cracking of CPO to fuel.  The carbon was produced using palm shell at 2 different temperatures (450 and 550oC).  The cracking of CPO was carried out with and without the active carbon catalyst.  The result showed that the use of catalyst increase the conversion of both gas and liquid conversion.  The use of higher temperature in the production of active carbon catalyst increased the performance of the catalyst, in particular, for the liquid conversion. Keywords :Activated carbon, catalyst, catalytic cracking, crude palm oil

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