About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in SSSAJ

  1. Vol. 73 No. 6, p. 1808-1816
     
    Received: Nov 20, 2008


    * Corresponding author(s): mkwang@ntu.edu.tw
 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2136/sssaj2008.0376

Automated Ultrafiltration Device for Efficient Collection of Environmental Nanoparticles from Aqueous Suspensions

  1. T. M. Tsaoa,
  2. M. K. Wang *a and
  3. P. M. Huangb
  1. a Dep. of Agricultural Chemistry, National Taiwan Univ., Taipei, 106, Taiwan
    b Dep. of Soil Science, Univ. of Saskatchewan, Saskatoon SK S7N 5A8, Canada

Abstract

Environmental nanoparticles exist in the hydrosphere, pedosphere, biosphere, and atmosphere. Their biogeochemical and ecological impacts are some of the fastest growing areas of research today. However, efficient separation of environmental nanoparticles remains difficult. The objective of this study was to develop an automated ultrafiltration device (AUD) for efficient collection of environmental nanoparticles. The AUD utilizes an automated hydraulic ram to facilitate collection of nanoparticles using the ultrafiltration membrane with pore size in the range of 1 to 100 nm. Zeolite A was used as a model nanoparticle sample to demonstrate the efficiency of the AUD. The size distribution and mean particle sizes determined by zeta-sizer analysis on the collected nanoparticles and their transmission electron micrographs indicated the adequacy of the AUD developed in this study in collecting nanoparticles (1–100 nm). Because of its ability to reduce the time needed for sample collection, coupled with the quantity of nanoparticles collected, the AUD was far more efficient than the conventional syringe method for collecting nanoparticles. The AUD has the characteristics of automation, easy operation, and high efficiency in the separation of nanoparticles and would, thus, facilitate future research and developments in environmental nanoscience and nanotechnology and their impacts on the ecosystem.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © 2009. Soil Science SocietySoil Science Society of America