Effect of bacteria on the transport and deposition of multi-walled carbon nanotubes in saturated porous media
In: EI ; SCI ; PubMed, 2016
Online
academicJournal
The influence of bacteria on the transport and deposition behaviors of carbon nanotubes (CNTs) in quartz sand was examined in both NaCl (5 and 25 mM ionic strength) and CaCl2 (0.3 and 1.2 mM ionic strength) solutions at unadjusted pH (5.6-5.8) by direct comparison of both breakthrough curves and retained profiles in both the presence and absence of bacteria. Two types of widely utilized CNTs, i.e., carboxyl and hydroxyl-functionalized multi-walled carbon nanotubes (MWCNT-COOH and MWCNT-OH, respectively), were employed as model CNTs and Escherichia coli was utilized as the model bacterium. The results showed that, for both types of MWCNTs under all examined conditions, the breakthrough curves were higher in the presence of bacteria, while the retained profiles were lower, indicating that the co-presence of bacteria in suspension increased the transport and decreased the deposition of MWCNTs in porous media, regardless of ionic strength or ion valence. Complementary characterizations and extra column tests demonstrated that competition by bacteria for deposition sites on the quartz sand surfaces was a major (and possibly the sole) contributor to the enhanced MWCNTs transport in porous media. (C) 2016 Published by Elsevier Ltd. ; National Nature Science Foundation of China [41422106, 21177002] ; SCI(E) ; EI ; PubMed ; ARTICLE ; tongmeiping@pku.edu.cn; kshjkim@jbnu.ac.kr ; 895-903 ; 213
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Effect of bacteria on the transport and deposition of multi-walled carbon nanotubes in saturated porous media
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Autor/in / Beteiligte Person: | Han, Peng ; Zhou, Dan ; Tong, Meiping ; Kim, Hyunjung ; Tong, MP (reprint author), Peking Univ, Sch Environm & Energy, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China. ; Tong, MP (reprint author), Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China. ; Kim, H (reprint author), Chonbuk Natl Univ, Dept Mineral Resources & Energy Engn, 567 Baekje Daero, Jeonju Si 561756, Jeollabuk Do, South Korea. ; Peking Univ, Sch Environm & Energy, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China. ; Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China. ; Chonbuk Natl Univ, Dept Mineral Resources & Energy Engn, 567 Baekje Daero, Jeonju Si 561756, Jeollabuk Do, South Korea. |
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Zeitschrift: | EI ; SCI ; PubMed, 2016 |
Veröffentlichung: | ENVIRONMENTAL POLLUTION, 2016 |
Medientyp: | academicJournal |
ISSN: | 0269-7491 (print) ; 1873-6424 (print) |
DOI: | 10.1016/j.envpol.2016.03.058 |
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