Targeted removal of trichlorophenol in water by oleic acid-coated nanoscale palladium/zero-valent iron alginate beads
- Targeted removal of trichlorophenol in water by oleic acid-coated nanoscale palladium/zero-valent iron alginate beads
- 장재원; 우희수; 고명수; 이재상; 이석헌; 윤성택; 이승학
- targeted removal; trichlorophenol; nanoscale palladium/zero-valent iron; alginate bead
- Issue Date
- Journal of hazardous materials
- VOL 293, 30-36
- tA new material was developed and evaluated for the targeted removal of trichlorophenol (TCP) fromamong potential interferents which are known to degrade removal activity. To achieve TCP-targetedactivity, an alginate bead containing nanoscale palladium/zero-valent iron (Pd/nZVI) was coated with ahighly hydrophobic oleic acid layer. The new material (Pd/nZVI-A-O) preferentially sorbed TCP from amixture of chlorinated phenols into the oleic acid cover layer and subsequently dechlorinated it to phenol.The removal efficacy of TCP by Pd/nZVI-A-O was not affected by co-existing organic substances such asSuwannee River humic acid (SRHA), whereas the material without the oleic acid layer (Pd/nZVI-A) becameless effective with increasing SRHA concentration. The inorganic substances nitrate and phosphatesignificantly reduced the reactivity of Pd/nZVI-A, however, Pd/nZVI-A-O showed similar TCP removalefficacies regardless of the initial inorganic ion concentrations. The influence of bicarbonate on the TCPremoval efficacies of both Pd/nZVI-A and Pd/nZVI-A-O was not significant. The findings from this study suggest that Pd/nZVI-A-O, with its targeted, constant reactivity for TCP, would be effective for treatingthis contaminant in surface water or groundwater containing various competitive substrates.
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