Characterization and ciprofloxacin adsorption properties of activated carbons prepared from biomass wastes by H3PO4 activation

The textural properties (surface area and porosity) of activated carbons change upon treatment with oxidizing solutions. The extent of this change is related to the strength of the oxidizing agent. Oxidation also changes the chemistry of the surface by forming carbon–oxygen groups which are the sites upon which the initial adsorption of water vapour takes place. The adsorption of water vapour at 300–320 K is mainly physical and the isosteric heat of adsorption decreases continuously as the surface coverage increases. The entropy of adsorption of water vapour on untreated and oxidized carbons, at different adsorption temperatures, has been calculated.

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A comparison of microstructure and adsorption characteristics of activated carbons by CO2 and H3PO4 activation from date palm pits

New Carbon Materials ◽

10.1016/s1872-5805(12)60020-1 ◽

2012 ◽

Vol 27 (5) ◽

pp. 344-351 ◽

Cited By ~ 45

Author(s):

K. Suresh Kumar Reddy ◽

Ahmed Al Shoaibi ◽

C. Srinivasakannan

Keyword(s):

Date Palm ◽

Activated Carbons ◽

Adsorption Characteristics ◽

H3po4 Activation

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SO2 and NO adsorption properties of activated carbons obtained from a pitch containing iron derivatives

Carbon ◽

10.1016/s0008-6223(01)00035-5 ◽

2001 ◽

Vol 39 (14) ◽

pp. 2173-2179 ◽

Cited By ~ 38

Author(s):

Paolo Davini

Keyword(s):

Activated Carbons ◽

Adsorption Properties ◽

No Adsorption

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Characterization of Coconut Shell Activated Carbon Obtained from By-Product of Preparation Process of Bio-Oil with Fast Pyrolysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.156-157.1215 ◽

2010 ◽

Vol 156-157 ◽

pp. 1215-1218 ◽

Cited By ~ 1

Author(s):

Qing Ruo Xie ◽

Zhang Fa Tong ◽

Li Wen Zheng ◽

Xiao Guang Chen

Keyword(s):

Activated Carbons ◽

Fast Pyrolysis ◽

Raw Material ◽

Activation Process ◽

Preparation Process ◽

Bio Oil ◽

Different Temperatures ◽

Coconut Shell Activated Carbon ◽

Bed Material ◽

H3po4 Activation

A new process was investigated which combines both fast pyrolysis carbonization and CS activated carbons with H3PO4 activation (CSAC). ACs were obtained as by-product from the preparation process of bio-oil with fast pyrolysis under different temperatures (T=727–973 K), in which the reaction ended in a very short duration. A two-step process of reaction is proposed to govern carbonization and activation: firstly fast pyrolysis reaction removing disorganized material was associated with considerable weight loss but with low generation of porosity, pyrolysis/carbonization under the flow of N2 is suggested to ensure fluidization of CS powders and bed material, enhance decomposition of raw material, initiates controlled gasification at different temperatures. Then H3PO4 activation process dominated at 573 K, which leads to considerable evolution of porosity. In this research, the adsorption characteristics were determined from N2 adsorption isotherms and subsequent analysised by the BET-and BJH-methods. As a result, the iodine adsorption number of AC was 1310 mg/g and the SSA of AC was 1421.38 m2/g .

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