Nanomaterials, nanoparticles. Citation of a paper on gold nanoparticles in water medium. The aquatic macrophyte Ceratophyllum demersum immobilizes Au nanoparticles after their addition to water.

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This paper was cited:

Doklady Biological Sciences. April 2010, Volume 431, Issue 1, pp 124-127;

Title: The aquatic macrophyte Ceratophyllum demersum immobilizes Au nanoparticles after their addition to water.

• Authors: S. A. Ostroumov, 
• G. M. Kolesov.

Authors affiliation: Moscow State University, Russian Academy of Sciences.

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Original Russian Text © S.A. Ostroumov, G.M. Kolesov, 2010, published in Doklady Akademii Nauk, 2010, Vol. 431, No. 4, pp. 566–569.

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This paper was cited by the following article:

Chemosphere.

Volume 89, Issue 5, October 2012, Pages 530–535

Distribution and bioavailability of ceria nanoparticles in an aquatic ecosystem model.

• Peng Zhang, 
• Xiao He, 
• Yuhui Ma, 
• Kai Lu, 
• Yuliang Zhao, 
• Zhiyong Zhang^, 

• Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, and Key Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, The Chinese Academy of Sciences, P.O. Box 918, Beijing 100049, China

• http://dx.doi.org/10.1016/j.chemosphere.2012.05.044, How to Cite or Link Using DOI

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Abstract

Along with the increasing utilization of engineered nanoparticles, there is a growing concern for the potential environmental and health effects of exposure to these newly designed materials. Understanding the behavior of nanoparticles in the environment is a basic need. The present study aims to investigate the distribution and fate of ceria nanoparticles in an aquatic system model which consists of sediments, water, hornworts, fish and snails, using a radiotracer technique. Concentrations of ceria in the samples at regular time intervals were measured. Ceria nanoparticles were readily removed from the water column and partitioned between different organisms. Both snail and fish have fast absorption and clearance abilities. Hornwort has the highest bioaccumulation factors. At the end of the experiment, sediments accumulated most of the nanoparticles with a recovery of 75.7 ± 27.3% of total ceria nanoparticles, suggesting that sediments are major sinks of ceria nanoparticles.

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Highlights

► We simulated a freshwater ecosystem in laboratory. ► A radiotracer technique was used as the quantitative method. ► Distribution and fate of ceria NPs in the aquatic ecosystem model were studied. ► Hornworts, snails and fish quickly accumulated and desorbed the ceria NPs. ► Sediments were found to be the ultimate sink of ceria NPs.

Keywords

• Ceria nanoparticles; 
• Aquatic ecosystem; 
• Radiotracer technique; 
• Distribution; 
• Bioavailability

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Figures and tables from this article:

Fig. 1. Structure and composition of the aquatic system model (A) fluorescent lamp; (B) fish in the nylon cage; (C) snails; (D) hornworts; (E) water; (F) sediment. Conductivity and total salinity of the aquarium water were 1.156 ms/cm and 700 mg/L, respectively. Biological oxygen demand (BOD) was 7.5 mg/L and the pH was 7.84 ± 0.05.

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Fig. 2. TEM image (A) and XRD pattern (B) of ceria NPs.

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Fig. 3. Variation of the zeta potential of CeO₂ NPs (20 mg/L) in deionized water as a function of the pH.

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Fig. 4. Concentrations of ceria nanoparticles in fish (A), hornworts (B), snails (C) and water (D). The inner picture in (D) is the magnification of the concentration of CeO₂ NPs in water within 24 h.

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Table 1. Bioaccumulation factors of different organisms in the aquatic ecosystem model.

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