Influence of Suwannee River humic acid on particle properties and toxicity of silver nanoparticles

被引：140

作者：

Gao, Jie ^{[1
,2
]}

Powers, Kevin ^{[1
]}

Wang, Yu ^{[3
]}

Zhou, Haoyan ^{[1
,4
]}

Roberts, Stephen M. ^{[5
]}

Moudgil, Brij M. ^{[1
,4
]}

Koopman, Ben ^{[2
]}

Barber, David S. ^{[5
]}

机构：

[1] Univ Florida, Particle Engn Res Ctr, Gainesville, FL 32611 USA

[2] Univ Florida, Dept Environm Engn Sci, Gainesville, FL 32611 USA

[3] Univ Florida, Dept Agr & Biol Engn, Gainesville, FL 32611 USA

[4] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[5] Univ Florida, Ctr Environm & Human Toxicol, Gainesville, FL 32611 USA

来源：

CHEMOSPHERE | 2012年 / 89卷 / 01期

关键词：

Nanoparticles; Organic matter; Water; Dissolution; Nanotoxicity; NATURAL ORGANIC-MATTER; MANUFACTURED NANOMATERIALS; ENGINEERED NANOPARTICLES; ION RELEASE; WATER; SUSPENSIONS; NANOTECHNOLOGY; AGGREGATION; FLOCCULANTS; ENVIRONMENT;

D O I：

10.1016/j.chemosphere.2012.04.024

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Adsorption of natural organic matter (NOM) on nanoparticles can have dramatic impacts on particle dispersion resulting in altered fate and transport as well as bioavailability and toxicity. In this study, the adsorption of Suwannee River humic acid (SRHA) on silver nanoparticles (nano-Ag) was determined and showed a Langmuir adsorption at pH 7 with an adsorption maximum of 28.6 mg g(-1) nano-Ag. It was also revealed that addition of <10 mg L-1 total organic carbon (TOC) increased the total Ag content suspended in the aquatic system, likely due to increased dispersion. Total silver content decreased with concentrations of NOM greater than 10 mg TOC L-1 indicating an increase in nanoparticle agglomeration and settling above this concentration. However, SRHA did not have any significant effect on the equilibrium concentration of ionic Ag dissolved in solution. Exposure of Daphnia to nano-Ag particles (50 mu g L-1 and pH 7) produced a linear decrease in toxicity with increasing NOM. These results clearly indicate the importance of water chemistry on the fate and toxicity of nanoparticulates. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：96 / 101

页数：6

共 39 条

[1]

[Anonymous], 2002, Short-term methods for estimating the chronic toxicity of effluents and receiving water to freshwater organisms, V5th

[2] Aggregation and disaggregation of iron oxide nanoparticles: Influence of particle concentration, pH and natural organic matter [J].

Baalousha, Mohammed .

SCIENCE OF THE TOTAL ENVIRONMENT, 2009, 407 (06) :2093-2101

[3] Derivation of a toxicity-based model to predict how water chemistry influences silver toxicity to invertebrates [J].

Bury, NR ;

Shaw, J ;

Glover, C ;

Flogstrand, C .

COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY, 2002, 133 (1-2) :259-270

[4] Unique Cellular Interaction of Silver Nanoparticles: Size-Dependent Generation of Reactive Oxygen Species [J].

Carlson, C. ;

Hussain, S. M. ;

Schrand, A. M. ;

Braydich-Stolle, L. K. ;

Hess, K. L. ;

Jones, R. L. ;

Schlager, J. J. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2008, 112 (43) :13608-13619

[5] Simultaneous dispersion-dissolution behavior of concentrated silver nanoparticle suspensions in the presence of model organic solutes [J].

Chappell, Mark A. ;

Miller, Lesley F. ;

George, Aaron J. ;

Pettway, Brad A. ;

Price, Cynthia L. ;

Porter, Beth E. ;

Bednar, Anthony J. ;

Seiter, Jennifer M. ;

Kennedy, Alan J. ;

Steevens, Jeffery A. .

CHEMOSPHERE, 2011, 84 (08) :1108-1116

[6] Surfactive stabilization of multi-walled carbon nanotube dispersions with dissolved humic substances [J].

Chappell, Mark A. ;

George, Aaron J. ;

Dontsova, Katerina M. ;

Porter, Beth E. ;

Price, Cynthia L. ;

Zhou, Pingheng ;

Morikawa, Eizi ;

Kennedy, Alan J. ;

Steevens, Jeffery A. .

ENVIRONMENTAL POLLUTION, 2009, 157 (04) :1081-1087

[7]

Christen K, 2007, ENVIRON SCI TECHNOL, V41, P671

[8]

Denecke MA, 1997, RADIOCHIM ACTA, V79, P151

[9]

Fabrega J., 2011, CHEMOSPHERE

[10] Silver Nanoparticle Impact on Bacterial Growth: Effect of pH, Concentration, and Organic Matter [J].

Fabrega, Julia ;

Fawcett, Shona R. ;

Renshaw, Joanna C. ;

Lead, Jamie R. .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2009, 43 (19) :7285-7290

← 1 2 3 4 →