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Evaluating GAC Adsorbers for the Removal of PCBs and Toxaphene
Author(s) -
Pirbazari Massoud,
Badriyha Badri N.,
Kim SungHyun,
Miltner Richard J.
Publication year - 1992
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1992.tb07308.x
Subject(s) - toxaphene , adsorption , activated carbon , humic acid , pollutant , chemistry , environmental chemistry , water treatment , environmental engineering , environmental science , organic chemistry , pesticide , fertilizer , biology , agronomy
The research described here investigated the effectiveness of activated carbon adsorption for the removal of polychlorinated biphenyls (PCBs) and toxaphene from organic‐free water (OFW) and humic acid background solution, using bench‐scale equilibrium and rate tests. In addition, complexation experiments were conducted to assess the extent of association between the target pollutants and humic acid (HA). The dispersed‐flow homogeneous surface diffusion model was satisfactory for predicting the performance of fixed‐bed adsorbers for removing PCBs from OFW. When HA was present, carbon capacity was greatly reduced because of complexation and competitive adsorption effects, and the adsorber dynamics were complicated by the presence of various species such as unassociated HA and pollutant–HA complexes.