Environmental Hg vapours adsorption and detection by using functionalized gold nanoparticles network

Publication date: Available online 11 July 2018Source: Journal of Environmental Chemical EngineeringAuthor(s): Andrea Bearzotti, Paolo Papa, Antonella Macagnano, Emiliano Zampetti, Iole Venditti, Raoul Fioravanti, Laura Fontana, Roberto Matassa, Giuseppe Familiari, Ilaria FratoddiAbstractAdsorption and detection of environmental total gaseous mercury (TGM) was studied by using gold nanoparticles (AuNPs) on purpose functionalized with dithiol ligands, i.e. Biphenyl-4,4′-dithiol (BI) or p-Terphenyl-4,4′′-dithiol (TR), suitable for nanoparticles based network formation. AuNPs-BI and AuNPs-TR with size 6-8 nm were deposited onto quartz fibres and used as adsorbent materials for the detection of TGM, both indoor for adsorption studies, at defined concentrations (~4.5 ng m-3 Hg), and outdoor, at the vapour mercury concentration of the environmental countryside (~1.5 ng m-3 Hg). The role of relative humidity (RH) in the absorption process has been observed. A high Hg adsorption capability, also when exposed to sub ppb concentration, has been observed. A cold vapour atomic fluorescence spectroscopy (CVAFS) detector was used to determine gaseous mercury concentrations lower than 2 ng m-3, with a robust and reproducible procedure. Moreover, the use of quartz fibres substrate covered with AuNPs-BI or AuNPs-TR, and used for more than thirty times during the experiments, makes them competitive in the use in large-scale measurement campaigns.Gr...
Source: Journal of Environmental Chemical Engineering - Category: Chemistry Source Type: research

Related Links:

David Porras, Esther Nistal, Susana Mart ínez-Flórez, Javier González-Gallego, María Victoria García-Mediavilla, Sonia Sánchez-Campos
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Lasse Gliemann, Nicolai Rytter, Peter Piil, Jannik Nilton, Thomas Lind, Michael Nyberg, Matthew Cocks, Ylva Hellsten
Source: Frontiers in Physiology - Category: Physiology Source Type: research
An-Hsuan Lin, Meng-Han Liu, Hsin-Kuo Ko, Diahn-Warng Perng, Tzong-Shyuan Lee, Yu Ru Kou
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Ascentia M. Seboko, M. M. Conradie, M. J. Kruger, William Frank Ferris, Magda Conradie, Mari van de Vyver
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Michael J. Zurawlew, Jessica A. Mee, Neil P. Walsh
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Pei-Ying S. Chan, Chia-Hsiung Cheng, Yu-Ting Wu, Changwei W. Wu, Ho-Ling A. Liu, Fu-Zen Shaw, Chia-Yih Liu, Paul W. Davenport
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Apolline Carrard, Elisa Fontana, Davide Malatesta
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Kristin Schink, Dejan Reljic, Hans J. Herrmann, Julia Meyer, Andreas Mackensen, Markus F. Neurath, Yurdag ül Zopf
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Qi-Lin Zhang, Guan-Ling Zhang, Ming-Long Yuan, Zhi-Xiang Dong, Hong-Wei Li, Jun Guo, Feng Wang, Xian-Yu Deng, Jun-Yuan Chen, Lian-Bing Lin
Source: Frontiers in Physiology - Category: Physiology Source Type: research
Matthias Walter, Amanda H. X. Lee, Alex Kavanagh, Aaron A. Phillips, Andrei V. Krassioukov
Source: Frontiers in Physiology - Category: Physiology Source Type: research
More News: Chemistry | Environmental Health | Nanotechnology | Study