Plasma polymer-functionalized silica particles for heavy metals remova

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dc.contributor.authorAkhavan, Ben_AU
dc.contributor.authorJarvis, Ken_AU
dc.contributor.authorMajewski, PJen_AU
dc.date.accessioned2017-04-03T04:53:58Zen_AU
dc.date.available2017-04-03T04:53:58Zen_AU
dc.date.issued2015-01-20en_AU
dc.date.statistics2017-04-03en_AU
dc.description.abstractHighly negatively charged particles were fabricated via an innovative plasma-assisted approach for the removal of heavy metal ions. Thiophene plasma polymerization was used to deposit sulfur-rich films onto silica particles followed by the introduction of oxidized sulfur functionalities, such as sulfonate and sulfonic acid, via water–plasma treatments. Surface chemistry analyses were conducted by X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectroscopy. Electrokinetic measurements quantified the zeta potentials and isoelectric points (IEPs) of modified particles and indicated significant decreases of zeta potentials and IEPs upon plasma modification of particles. Plasma polymerized thiophene-coated particles treated with water plasma for 10 min exhibited an IEP of less than 3.5. The effectiveness of developed surfaces in the adsorption of heavy metal ions was demonstrated through copper (Cu) and zinc (Zn) removal experiments. The removal of metal ions was examined through changing initial pH of solution, removal time, and mass of particles. Increasing the water plasma treatment time to 20 min significantly increased the metal removal efficiency (MRE) of modified particles, whereas further increasing the plasma treatment time reduced the MRE due to the influence of an ablation mechanism. The developed particulate surfaces were capable of removing more than 96.7% of both Cu and Zn ions in 1 h. The combination of plasma polymerization and oxidative plasma treatment is an effective method for the fabrication of new adsorbents for the removal of heavy metals. © 2015 American Chemical Societyen_AU
dc.identifier.citationAkhavan, B., Jarvis, K., & Majewski, P. (2015). Plasma polymer-functionalized silica particles for heavy metals removal. ACS Applied Materials & Interfaces, 7(7), 4265-4274. doi:10.1021/am508637ken_AU
dc.identifier.govdoc8065en_AU
dc.identifier.issn1944-8244en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitleACS Applied Materials & Interfacesen_AU
dc.identifier.pagination4265-4274en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/am508637ken_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/8521en_AU
dc.identifier.volume7en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectAdsorptionen_AU
dc.subjectPlasmaen_AU
dc.subjectThiopheneen_AU
dc.subjectPolymerizationen_AU
dc.subjectWater treatmenten_AU
dc.subjectHeavy metalsen_AU
dc.titlePlasma polymer-functionalized silica particles for heavy metals removaen_AU
dc.typeJournal Articleen_AU
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