The competing effects of microbially derived polymeric and low molecular-weight substances on the dispersibility of CeO2 nanoparticles

Scientific Reports
Yuriko NakanoSatoshi Utsunomiya

Abstract

To understand the competing effects of the components in extracellular substances (ES), polymeric substances (PS) and low-molecular-weight small substances (SS) <1 kDa derived from microorganisms, on the colloidal stability of cerium dioxide nanoparticles (CeNPs), we investigated their adsorption to sparingly soluble CeNPs at room temperature at pH 6.0. The ES was extracted from the fungus S. cerevisiae. The polypeptides and phosphates in all components preferentially adsorbed onto the CeNPs. The zeta potentials of ES + CeNPs, PS + CeNPs, and SS + CeNPs overlapped on the plot of PS itself, indicating the surface charge of the polymeric substances controls the zeta potentials. The sizes of the CeNP aggregates, 100-1300 nm, were constrained by the zeta potentials. The steric barrier derived from the polymers, even in SS, enhanced the CeNP dispersibility at pH 1.5-10. Consequently, the PS and SS had similar effects on modifying the CeNP surfaces. The adsorption of ES, which contains PS + SS, can suppress the aggregation of CeNPs over a wider pH range than that for PS only. The present study addresses the non-negligible effects of small-sized molecules derived from microbial activity on the migration of CeNP in aquatic environments...Continue Reading

References

Nov 1, 1980·British Journal of Industrial Medicine·M LippmannR E Albert
Jul 27, 2002·Environmental Science & Technology·Julia ShealsPer Persson
Sep 12, 2003·Environmental Science & Technology·Luke M MosleyWilliam A Ducker
Dec 1, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Anselm OmoikeJames D Kubicki
Jun 2, 2005·Journal of the American Chemical Society·Paul RoachCarole C Perry
Oct 21, 2006·Environmental Science & Technology·Antoine ThillAnne Marie Flank
Nov 23, 2006·Toxicology and Applied Pharmacology·Weisheng LinYinfa Ma
Oct 1, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Saikat GhoshBaoshan Xing
Dec 17, 2008·Environmental Toxicology and Chemistry·Stephen J KlaineJamie R Lead
Jul 17, 2009·Environmental Science & Technology·Moshe HerzbergMenachem Elimelech
Jul 17, 2009·Environmental Science & Technology·Karen Van HoeckeColin R Janssen
Feb 16, 2010·Environmental Science & Technology·Arturo A KellerZhaoxia Ji
Aug 3, 2010·Nature Reviews. Microbiology·Hans-Curt Flemming, Jost Wingender
Oct 19, 2010·Applied and Environmental Microbiology·Dale A PelletierMitchel J Doktycz
Dec 7, 2010·Colloids and Surfaces. B, Biointerfaces·Yuanyuan CaoWei Liang
Feb 3, 2011·Journal of Environmental Quality·Ernest M HotzeGregory V Lowry
Feb 5, 2011·Environmental Science & Technology·Amrika DeonarineHeileen Hsu-Kim
Mar 17, 2011·Environmental Science & Technology·George R AikenJoseph N Ryan
May 28, 2011·Environmental Toxicology·Suzanne Marie HirstChristopher M Reilly
May 16, 2012·Environmental Science & Technology·Gregory V LowryJamie R Lead
Jun 8, 2014·Journal of Environmental Management·T T MoreR Y Surampalli
Oct 22, 2016·Environmental Science & Technology·Adeyemi S Adeleye, Arturo A Keller
Jan 24, 2017·Environmental Science & Technology·James G DaleMichael F Hochella

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

Methods Mentioned

BETA
scanning probe microscopy
atomic emission spectrometry
x-ray spectroscopy
AFM

Related Concepts

Related Feeds

Cell Migration

Cell migration is involved in a variety of physiological and pathological processes such as embryonic development, cancer metastasis, blood vessel formation and remoulding, tissue regeneration, immune surveillance and inflammation. Here is the latest research.

© 2022 Meta ULC. All rights reserved