Dissolution of metal and metal oxide nanoparticles under natural freshwater conditions

被引：32

作者：

Odzak, Niksa ^{[1
]}

Kistler, David ^{[1
]}

Behra, Renata ^{[1
]}

Sigg, Laura ^{[1
]}

机构：

[1] Eawag, Swiss Fed Inst Aquat Sci & Technol, Dept Environm Toxicol Utox, CH-8600 Dubendorf, Switzerland

来源：

ENVIRONMENTAL CHEMISTRY | 2015年 / 12卷 / 02期

关键词：

COATED SILVER NANOPARTICLES; TRACE-METALS; DIFFUSION GRADIENTS; THIN-FILMS; SPECIATION; BIOAVAILABILITY; TOXICITY; STABILITY; NANOMATERIALS; PERFORMANCE;

D O I：

10.1071/EN14049

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The dissolution of some widely used nanoparticles (NPs), Ag (citrate coated), ZnO, CuO and Cu-carbon coated (Cu/C), has been studied over a period of 9 days in five different natural waters: wastewater treatment plant effluent (WWTP Dubendorf) and lakes Greifen, Lucerne, Gruere and Cristallina. These waters differ in ionic strength, pH and dissolved organic carbon (DOC). The dissolved fraction of metals from NPs was determined using DGT (diffusion gradients in thin films) and ultrafiltration (UF). ZnO-NPs and CuO-NPs dissolved to a large extent in all waters, whereas the dissolved fraction was much smaller in the case of Cu/C and Ag-NPs. All NPs dissolved to a larger extent in water from Lake Cristallina with low pH, low ionic strength and low DOC. Ag-NP dissolution was favoured at low ionic strength and low pH, whereas dissolution of CuO-NPs was mostly dependent on pH. Cu/C-NPs strongly agglomerated and sedimented and yielded low dissolved Cu concentrations. DGT and UF produced similar results, although these two methods differ in the measurement time scale. The results of this study indicate that dissolution is an important process for these NPs under conditions of natural waters or wastewaters.

引用

页码：138 / 148

页数：11

共 47 条

[41] Assessing the risks of manufactured nanomaterials [J].

Wiesner, Mark R. ;

Lowry, Greg V. ;

Alvarez, Pedro ;

Dionysiou, Dianysios ;

Biswas, Pratim .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (14) :4336-4345

[42] Negligible Particle-Specific Antibacterial Activity of Silver Nanoparticles [J].

Xiu, Zong-ming ;

Zhang, Qing-bo ;

Puppala, Hema L. ;

Colvin, Vicki L. ;

Alvarez, Pedro J. J. .

NANO LETTERS, 2012, 12 (08) :4271-4275

[43] Differential Effect of Common Ligands and Molecular Oxygen on Antimicrobial Activity of Silver Nanoparticles versus Silver Ions [J].

Xiu, Zong-Ming ;

Ma, Jie ;

Alvarez, Pedro J. J. .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2011, 45 (20) :9003-9008

[44] Mechanism of Silver Nanoparticle Toxicity Is Dependent on Dissolved Silver and Surface Coating in Caenorhabditis elegans [J].

Yang, Xinyu ;

Gondikas, Andreas P. ;

Marinakos, Stella M. ;

Auffan, Melanie ;

Liu, Jie ;

Hsu-Kim, Heileen ;

Meyer, Joel N. .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2012, 46 (02) :1119-1127

[45] Diffusional characteristics of hydrogels used in DGT and DET techniques [J].

Zhang, H ;

Davison, W .

ANALYTICA CHIMICA ACTA, 1999, 398 (2-3) :329-340

[46] PERFORMANCE-CHARACTERISTICS OF DIFFUSION GRADIENTS IN THIN-FILMS FOR THE IN-SITU MEASUREMENT OF TRACE-METALS IN AQUEOUS-SOLUTION [J].

ZHANG, H ;

DAVISON, W .

ANALYTICAL CHEMISTRY, 1995, 67 (19) :3391-3400

[47] Nanoscale iron particles for environmental remediation: An overview [J].

Zhang, WX .

JOURNAL OF NANOPARTICLE RESEARCH, 2003, 5 (3-4) :323-332

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