+ 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

Effect of natural organic matter on powdered activated carbon adsorption of trace contaminants: characteristics and mechanism of competitive adsorption

Effect of natural organic matter on powdered activated carbon adsorption of trace contaminants: characteristics and mechanism of competitive adsorption

Water Research 37(18): 4413-4424

Batch adsorption experiments using powdered activated carbon (PAC) to remove trace synthetic organic chemicals (SOCs) from water containing natural organic matter (NOM) were conducted. The percentage of SOC removed at any contact time and at any PAC dose was observed to be independent of the initial SOC concentration. Equations derived from the ideal adsorbed solution theory and the pore surface diffusion model validated this observation. For the strongly adsorbing SOCs (simazine and simetryn), the percentage of SOC removed was independent only at low initial SOC concentrations. The NOM fraction competing with the weakly adsorbing SOC (asulam) constituted a larger percentage of the total NOM than that competing with the strongly adsorbing SOCs. Although the adsorptive capacities of the SOCs were greatly reduced in water containing NOM compared with those in pure water, the change in the pore diffusion coefficient was insignificant. Therefore, NOM competed with the SOCs for adsorption sites, reducing the adsorptive capacity, but the amount of NOM loading was not so severe that it blocked or filled the pores, hindering the internal diffusion of the SOCs.

Please choose payment method:

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

Accession: 004124382

Download citation: RISBibTeXText

PMID: 14511712

DOI: 10.1016/s0043-1354(03)00423-8

Related references

Characteristics of competitive adsorption between 2-methylisoborneol and natural organic matter on superfine and conventionally sized powdered activated carbons. Water Research 46(15): 4741-4749, 2012

Effects of powdered activated carbon pore size distribution on the competitive adsorption of aqueous atrazine and natural organic matter. Environmental Science & Technology 42(4): 1227-1231, 2008

Comparison of natural organic matter adsorption capacities of super-powdered activated carbon and powdered activated Carbon. Water Research 44(14): 4127-4136, 2010

Adsorption of clofibric acid and ketoprofen onto powdered activated carbon: effect of natural organic matter. Environmental Technology 33(15-16): 1719-1727, 2011

Adsorption of clofibric acid and ketoprofen onto powdered activated carbon: Effect of natural organic matter. Environmental Technology 32(15): 1719-1727, 2011

Effect of natural organic matter loading on the atrazine adsorption capacity of an aging powdered activated carbon slurry. Water Research Oxford 33(7): 1695-1705, 1999

Competitive adsorption of trace organics on membranes and powdered activated carbon in powdered activated carbon-ultrafiltration system. Water Science & Technology 34(9): 223-229, 1996

Effect of the adsorbate (Bromacil) equilibrium concentration in water on its adsorption on powdered activated carbon. Part 3: Competition with natural organic matter. Journal of Hazardous Materials 182(1-3): 10-17, 2010

Effect of pore size distribution on competitive adsorption of trace organic micropollutants in natural water on activated carbon. Proceedings, AWWA Annual Conference 1997, Vol, 1997

Geosmin and 2-methylisoborneol adsorption on super-powdered activated carbon in the presence of natural organic matter. Water Science and Technology 62(11): 2664-2668, 2010

Adsorption of atrazine by powdered activated carbon: Influence of dissolved organic and mineral matter of natural waters. Environmental Technology 18(5): 467-478, 1997

Pesticides removal on activated carbon: competitive adsorption with natural organic matter. Water supply: the review journal of the International Water Supply Association4(2): 43-48, 1996

Adsorption of Atrazine by Powdered Activated Carbon: Influence of Dissolved Organic and Mineral Matter of Natural Waters Adsorption de L'atrazine Par Charbon Actif en Poudre: Influence des Matieres Organiques et Minerales Dissoutes des Eaux Naturelles. Environmental Technology 18(5): 467-478, 1997

Adsorption of organic contaminants by graphene nanosheets, carbon nanotubes and granular activated carbons under natural organic matter preloading conditions. Science of the Total Environment 565: 811-817, 2016

Adsorption of Estrogen Contaminants by Graphene Nanomaterials under Natural Organic Matter Preloading: Comparison to Carbon Nanotube, Biochar, and Activated Carbon. Environmental Science and Technology 51(11): 6352-6359, 2017