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Title: Immobilization of zinc and cadmium by montmorillonite compounds: Effects of aging and subsequent acidification

Abstract

The addition of aluminum treated montmorillonites as binding agents that immobilize heavy metals is an innovative approach for the remediation of arable soils polluted with heavy metals. The authors investigated the influence of aging and subsequent sudden acidification on the binding of zinc and cadmium by montmorillonite, Al-montmorillonite and Al{sub 13}-montmorillonite increased, probably due to a partial incorporation in the aluminum hydroxide lattice. Sorption and desorption were hysteretic with respect to pH, i.e., desorption required lower pH values that adsorption to reach the same state of metal partitioning between solid phase and solution. In addition, these minerals enhance the pH buffer capacity of the soil. The results suggest that Al-montmorillonite and Al{sub 13}-montmorillonite are suitable minerals to be used as binding agents for the gentle immobilization of heavy metals in polluted soils.

Authors:
; ; ;  [1]
  1. ETH Zurich (Switzerland). Inst. of Terrestrial Ecology
Publication Date:
OSTI Identifier:
696768
Resource Type:
Journal Article
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 33; Journal Issue: 17; Other Information: PBD: 1 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ZINC; CADMIUM; SOILS; REMEDIAL ACTION; MONTMORILLONITE; SOLIDIFICATION; ACIDIFICATION; SORPTION; PERFORMANCE TESTING

Citation Formats

Lothenbach, B., Furrer, G., Schaerli, H., and Schulin, R. Immobilization of zinc and cadmium by montmorillonite compounds: Effects of aging and subsequent acidification. United States: N. p., 1999. Web. doi:10.1021/es981317q.
Lothenbach, B., Furrer, G., Schaerli, H., & Schulin, R. Immobilization of zinc and cadmium by montmorillonite compounds: Effects of aging and subsequent acidification. United States. doi:10.1021/es981317q.
Lothenbach, B., Furrer, G., Schaerli, H., and Schulin, R. Wed . "Immobilization of zinc and cadmium by montmorillonite compounds: Effects of aging and subsequent acidification". United States. doi:10.1021/es981317q.
@article{osti_696768,
title = {Immobilization of zinc and cadmium by montmorillonite compounds: Effects of aging and subsequent acidification},
author = {Lothenbach, B. and Furrer, G. and Schaerli, H. and Schulin, R.},
abstractNote = {The addition of aluminum treated montmorillonites as binding agents that immobilize heavy metals is an innovative approach for the remediation of arable soils polluted with heavy metals. The authors investigated the influence of aging and subsequent sudden acidification on the binding of zinc and cadmium by montmorillonite, Al-montmorillonite and Al{sub 13}-montmorillonite increased, probably due to a partial incorporation in the aluminum hydroxide lattice. Sorption and desorption were hysteretic with respect to pH, i.e., desorption required lower pH values that adsorption to reach the same state of metal partitioning between solid phase and solution. In addition, these minerals enhance the pH buffer capacity of the soil. The results suggest that Al-montmorillonite and Al{sub 13}-montmorillonite are suitable minerals to be used as binding agents for the gentle immobilization of heavy metals in polluted soils.},
doi = {10.1021/es981317q},
journal = {Environmental Science and Technology},
number = 17,
volume = 33,
place = {United States},
year = {1999},
month = {9}
}