Publisher : Korean Society of Environmental Engineering
DOI : 10.4491/eer.2010.15.3.149
Title & Authors
Microbial Removal Using Layered Double Hydroxides and Iron (Hydr)oxides Immobilized on Granular Media Park, Jeong-Ann; Lee, Chang-Gu; Park, Seong-Jik; Kim, Jae-Hyeon; Kim, Song-Bae;
The objective of this study was to investigate microbial removal using layered double hydroxides (LDHs) and iron (hydr)oxides (IHs) immobilized onto granular media. Column experiments were performed using calcium alginate beads (CA beads), LDHs entrapped in CA beads (LDH beads), quartz sand (QS), iron hydroxide-coated sand (IHCS) and hematite-coated sand (HCS). Microbial breakthrough curves were obtained by monitoring the effluent, with the percentage of microbial removal and collector efficiency then quantified from these curves. The results showed that the LDH beads were ineffective for the removal of the negatively-charged microbes (27.7% at 1 mM solution), even though the positively-charged LDHs were contained on the beads. The above could be related to the immobilization method, where LDH powders were immobilized inside CA beads with nano-sized pores (about 10 nm); therefore, micro-sized microbes (E. coli
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