THE EFFECT OF MOLECULAR-OXYGEN ON THE ACTIVATED CARBON ADSORPTION OF NATURAL ORGANIC-MATTER IN OHIO RIVER WATER

Citation
Cl. Warta et al., THE EFFECT OF MOLECULAR-OXYGEN ON THE ACTIVATED CARBON ADSORPTION OF NATURAL ORGANIC-MATTER IN OHIO RIVER WATER, Water research, 29(2), 1995, pp. 551-562
Citations number
27
Categorie Soggetti
Engineering, Civil","Environmental Sciences","Water Resources
Journal title
ISSN journal
00431354
Volume
29
Issue
2
Year of publication
1995
Pages
551 - 562
Database
ISI
SICI code
0043-1354(1995)29:2<551:TEOMOT>2.0.ZU;2-Z
Abstract
Recently published data show that the adsorptive capacity of granular activated carbon for phenols increases significantly in the presence o f molecular oxygen (Vidic, Suidan, Traegner and Nakhla, 1990). In this study, the effect of molecular oxygen on the adsorptive capacity of a ctivated carbon for the natural organic matter present in Ohio River w ater was investigated. This source of natural organic matter was selec ted because it is a natural surface water and represents Cincinnati's main drinking water supply. Isotherm studies using pulverized activate d carbon were conducted during the first week of each month of the yea r 1992. Adsorption isotherms were conducted on water from two stages o f treatment (raw water directly pumped from the Ohio River and settled water from the California Drinking Water Treatment Plant, Cincinnati, Ohio). Investigations were conducted in the presence and absence of m olecular oxygen. An appreciable increase in the adsorptive capacity of activated carbon for natural organic matter was noticed when molecula r oxygen was present in the test environment. The adsorption isotherms were further described by fractionating the unknown matrix into a non adsorbable fraction and four fictive components of different adsorbab ilities.