+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Characteristics of competitive adsorption of aquatic humic substances onto activated carbon



Characteristics of competitive adsorption of aquatic humic substances onto activated carbon



Water Science and Technology 36(12): 231-238,.



The competitive adsorption of aqueous humic substance onto activated carbon was characterized. A technique to determine its composition in terms of both the molecular weight and the adsorbability was developed. This technique required the equilibria of molecular weight fractions in the mixture and that of the hypothetical components which could account for the competitive adsorption of the total organics. The former was obtained by measuring the molecular weight distributions of the humic substance remaining in solution over various carbon dosages with size exclusion HPLC. The latter was achieved by using a method developed on the basis of ideal adsorbed solution theory (IAST) to describe the overall adsorption isotherms for background organics of known composition. Using this technique, the adsorption equilibria of all the molecular weight fractions in the mixture were quantitatively described, and the existence of a correlation between the molecular weight and the adsorptive strength was confirmed. This technique was shown to be also effective in clarifying the composition of the remaining humic substance over different carbon dosages.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 008290350

Download citation: RISBibTeXText

DOI: 10.1016/s0273-1223(97)00740-3


Related references

Competitive adsorption of trichloroethylene and humic substances from groundwater on activated carbon. Water Research 24(6): 773-780, 1990

Effect of ozonation and coagulation on adsorption of aquatic humic substances on activated carbon. Abstracts of Papers American Chemical Society 193, 1987

Activated carbon adsorption of humic substances. American Water Works Association Journal 73(8): 440-446, 1981

Adsorption of humic substances on activated carbon. Annali di Chimica 85(11-12): 613-620, 1995

Characterization and activated carbon adsorption of several humic substances. Water Research 14(2): 151-160, 1980

Activated carbon vs. resin adsorption of humic substances. American Water Works Association Journal 72(1): 54-59, 1980

Investigation of preferential adsorption of humic substances on activated carbon. Abstracts of Papers American Chemical Society 225(1-2): COLL 151, 2003

Reaction of free chlorine with humic substances before and after adsorption on activated carbon. Environmental Science and Technology 15(2): 193-197, 1981

Activated carbon adsorption of humic substances 1. heterodisperse mixtures and desorption. Journal of Colloid and Interface Science 122(2): 367-381, 1988

Activated carbon adsorption of humic substances ii. size exclusion and electrostatic interactions. Journal of Colloid and Interface Science 122(2): 382-397, 1988

Removal of pesticides by adsorption onto powdered activated carbon. The effect of humic substances. Watershed 89: The future for water quality in Europe Volume II Proceedings of IAWPRC conference, Guildford, UK, 17-20 April 1989: 497-504, 1990

Adsorption of humic substances on activated carbon, prepared from locally available waste materials. Studies in environmental Science 9(29): 401-420, 1986

Competitive effects of humic acid and wastewater on adsorption of Methylene Blue dye by activated carbon and non-imprinted polymers. Journal of Environmental Sciences 66: 310-317, 2018

Trichloroethylene adsorption by activated carbon preloaded with humic substances: effects of solution chemistry. Water Research 36(7): 1685-1698, 2002

Study of humic substances adsorption onto powdered activated carbon in the presence of a cationic surfactant. Environmental Technology 13(1): 55-64, 1992