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Adhesion of Escherichia coli to Iron‐Coated Sand in the Presence of Humic Acid: A Column Experiment
Author(s) -
Park SeongJik,
Kim SongBae
Publication year - 2009
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143008x304587
Subject(s) - humic acid , chemistry , escherichia coli , leaching (pedology) , phosphate , bacteria , adhesion , nuclear chemistry , chromatography , environmental chemistry , biochemistry , geology , organic chemistry , gene , paleontology , fertilizer , soil water , soil science
Column experiments were performed to examine the influence of humic acid on the attachment of Escherichia coli to iron‐coated sand. Results show that, in the coated sand, the average mass recovery was 2.9% in deionized water and increased sharply to 94.6% at a humic acid concentration of 16 mg/L. In leaching solution containing both humic acid and phosphate, the mass recovery increased from 26.0 to 94.6%, by increasing the portion of humic acid from 0 to 100% (from 0 to 16 mg/L). In addition, the mass recovery (94.6%) at a humic acid concentration of 16 mg/L was much larger than that (26.0%) at the same concentration of phosphate. This study presents information regarding the role of humic acid in the adhesion of bacteria to iron‐coated sand and helps to enhance the knowledge of bacterial removal in positively charged porous media.