Targeted removal of trichlorophenol in water by oleic acid-coated nanoscale palladium/zero-valent iron alginate beads

Title
Targeted removal of trichlorophenol in water by oleic acid-coated nanoscale palladium/zero-valent iron alginate beads
Authors
장재원우희수고명수이재상이석헌윤성택이승학
Keywords
targeted removal; trichlorophenol; nanoscale palladium/zero-valent iron; alginate bead
Issue Date
2015-08
Publisher
Journal of hazardous materials
Citation
VOL 293, 30-36
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/49513
ISSN
03043894
Appears in Collections:
KIST Publication > Article
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