Pretreatment Effects on Activated Carbon Adsorption of Humic Substances: Distributed Fictive Component Analysis

1999 ◽  
Vol 40 (9) ◽  
pp. 223-230 ◽  
Author(s):  
Yoshihiko Matsui ◽  
Akira Yuasa ◽  
Fu-Sheng Li
Keyword(s):  
Activated Carbon ◽  
Humic Substances ◽  
Batch Adsorption ◽  
Activated Carbon Adsorption ◽  
Multicomponent Adsorption ◽  
Carbon Adsorption ◽  
Ideal Adsorption Solution Theory ◽  
Organic Carbon Concentration ◽  
Pretreatment Effects ◽  
The Ideal

Diluted solutions of a peat water and a biological wastewater effluent were subjected to coagulation, ozonation, and chlorination. The effects of these pretreatments on the removal of humic substances by activated carbon adsorption were tested. Batch adsorption isotherms were analyzed using a distributed fictive component method, which assumed a logarithmic normal distribution of Freundlich K and a non-adsorbable fraction in the Ideal Adsorption Solution Theory for multicomponent adsorption. Coagulation treatment not only increased adsorbabilities but also decreased its heterogeneity in terms of multicomponent adsorbates. Ozonation decreased adsorbabilities and increased heterogeneity in adsorbabilities by producing weakly adsorbing compounds. The average Freundlich K decreased, while the Freundlich exponent, 1/n, and non-adsorbable fraction was increased with ozone consumption. Chlorination showed the same effects as ozonation. However, after ozonation, equilibrium capacity at low activated carbon doses was increased because of the reduced dissolved organic carbon concentration by ozonation.

Fast Assessment of Toxicants Adsorption on Activated Carbon Using a Luminous Bacteria Bioassay

1993 ◽  
Vol 27 (7-8) ◽  
pp. 113-120 ◽  
Author(s):  
Asher Brenner ◽  
Shimshon Belkin ◽  
Shimon Ulitzur ◽  
Aharon Abeliovich
Keyword(s):  
Activated Carbon ◽  
Direct Determination ◽  
Industrial Wastes ◽  
Batch Adsorption ◽  
Activated Carbon Adsorption ◽  
Freundlich Model ◽  
Bacterial Bioluminescence ◽  
Carbon Adsorption ◽  
Luminous Bacteria

A new approach for the evaluation of activated carbon adsorption characteristics in the treatment of water contaminated by toxic organic compounds is presented. It is based on direct determination of the toxicity in the treated water, as opposed to actual chemical analysis of their constituents. The MicrotoxR bioassay, based upon measurement of bacterial bioluminescence, was utilized for this purpose. The suitability of this approach was judged by applying values of residual toxicities, obtained during batch adsorption experiments with mixtures of pure chemicals and industrial wastes, to traditional mathematical models. The Freundlich model was found to describe accurately adsorption isotherms derived from balances of residual toxicities, as well as from residual concentrations of specific chemicals. This approach allows a fast, convenient assessment of selective toxicant adsorption, alleviating the need for complex analytical methods.

Activated carbon adsorption of humic substances

1981 ◽  
Vol 73 (8) ◽  
pp. 440-446 ◽  
Author(s):  
Michael C. Lee ◽  
Vernon L. Snoeyink ◽  
John C. Crittenden
Keyword(s):  
Activated Carbon ◽  
Humic Substances ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption

Treatment of High-Strength, Complex and Toxic Chemical Wastewater: End-of Pipe “Best Available Technology” vs. an In-Plant Control Program

1994 ◽  
Vol 29 (8) ◽  
pp. 221-233
Author(s):  
Shimshon Belkin ◽  
Asher Brenner ◽  
Alon Lebel ◽  
Aharon Abeliovich
Keyword(s):  
Activated Carbon ◽  
Control Program ◽  
High Strength ◽  
Activated Carbon Adsorption ◽  
Acceptable Solution ◽  
Conventional Activated Sludge ◽  
Carbon Adsorption ◽  
Individual Source ◽  
Best Available Technology ◽  
Available Technology

A case study is presented, in which two approaches to the treatment of complex chemical wastewater are experimentally compared: an end-of-pipe “best available technology” option and an in-plant source segregation program. Both options proved to be feasible. Application of the powdered activated carbon treatment (PACT™) process for the combined end-of-pipe stream yielded up to 93% reduction of dissolved organic carbon, with complete toxicity elimination. In order to examine the potential for applying a conventional activated sludge process, a simplified laboratory screening procedure was devised, aimed at establishing baseline data of removability potential, defined either by biodegradation, activated carbon adsorption or volatilization. Using this procedure, the major source of the non-biodegradable fraction in the combined park's wastewater was traced to a single factory, from which twelve individual source streams were screened. The results allowed the division of the tested sources into three groups: degradable, volatile, and problematic. A modified wastewater segregation and treatment program was accordingly proposed, which should allow an efficient and environmentally acceptable solution. This program is presently at its final testing stages, at the conclusion of which a full comparison between the two approaches will be carried out.

The effect of surface metal oxides on activated carbon adsorption of phenolics

1998 ◽  
Vol 32 (6) ◽  
pp. 1841-1851 ◽  
Author(s):  
Lois J. Uranowski ◽  
Charles H. Tessmer ◽  
Radisav D. Vidic
Keyword(s):  
Activated Carbon ◽  
Metal Oxides ◽  
Activated Carbon Adsorption ◽  
Carbon Adsorption ◽  
Surface Metal ◽  
Effect Of Surface
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