Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Size characterization of bentonite colloids by different methods.

M Plaschke1, T Schäfer, T Bundschuh

  • 1Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe GmbH, Germany. plaschke@ine.fzk.de

Analytical Chemistry
|September 25, 2001
PubMed
Summary

Characterizing bentonite colloids in groundwater requires multiple methods. Combining techniques like atomic force microscopy (AFM) and laser-induced breakdown detection (LIBD) provides essential colloid size and shape data.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Nasal secretions trace epithelial type 2 response to allergen-specific immunotherapy.

Rhinology·2024
Same author

First Report of <i>Pseudomonas cichorii</i> Causing Bacterial vein necrosis on Perilla plants [<i>Perilla frutescens</i> (L.) Britton.] in South Korea.

Plant disease·2022
Same author

Fungal Planet description sheets: 1112-1181.

Persoonia·2021
Same author

Simultaneous regeneration of calcium lactate and cellulose into PCL nanofiber for biomedical application.

Carbohydrate polymers·2019
Same author

Kidney Transplantation Using Expanded-Criteria Deceased Donors: A Comparison With Ideal Deceased Donors and Non-Expanded-Criteria Deceased Donors.

Transplantation proceedings·2018
Same author

The surface chemistry of sapphire-c: A literature review and a study on various factors influencing its IEP.

Advances in colloid and interface science·2017

Area of Science:

  • Colloid and Surface Science
  • Environmental Geochemistry
  • Analytical Chemistry

Background:

  • Bentonite colloids are released into low-mineralized groundwater.
  • Accurate characterization of colloid size and shape is crucial for understanding environmental transport.
  • Various analytical methods exist, but raw data often requires correction for chemical composition, shape, and instrumental artifacts.

Purpose of the Study:

  • To investigate the size and shape of natural bentonite colloids in groundwater.
  • To compare results from multiple colloid characterization techniques.
  • To evaluate the influence of particle shape on measurement outcomes.

Main Methods:

  • Atomic Force Microscopy (AFM) for high-resolution imaging and shape analysis.

Related Experiment Videos

  • Laser-Induced Breakdown Detection (LIBD) for particle sizing.
  • Photon Correlation Spectroscopy (PCS) for dynamic light scattering measurements.
  • Flow Field-Flow Fractionation coupled to ICP-Mass Spectrometry (FFFF-ICPMS) for size-based separation and elemental analysis.

    • Main Results:

    • AFM revealed disklike bentonite colloids with a mean aspect ratio of approximately 1/10 and a mean particle diameter of 73 nm from image processing.
    • Broad particle number size distributions were consistently observed across AFM, PCS, and FFFF-ICPMS.
    • Mean particle sizes from LIBD (67 ± 13 nm) and FFFF-ICPMS (approx. 70 nm) agreed well with AFM, while PCS yielded larger sizes (>200 nm) due to intensity weighting.

    Conclusions:

    • A single method is insufficient for comprehensive colloid characterization.
    • Combining multiple techniques provides complementary data on colloid size and shape.
    • Accurate colloid characterization is essential for understanding natural colloidal systems and their behavior in groundwater.