Affordable Access

Access to the full text

Sorption behavior of heavy metal pollutants onto shales and correlation with shale geochemistry

Authors
  • Paikaray, S.1
  • Banerjee, S.1
  • Mukherji, S.2
  • 1 IIT Bombay, Department of Earth Sciences, Mumbai, India , Mumbai
  • 2 Center for Environmental Science and Engineering, IIT Bombay Powai, Mumbai, 400 076, India , Mumbai
Type
Published Article
Journal
Environmental Geology
Publisher
Springer-Verlag
Publication Date
Apr 09, 2005
Volume
47
Issue
8
Pages
1162–1170
Identifiers
DOI: 10.1007/s00254-005-1262-x
Source
Springer Nature
Keywords
License
Yellow

Abstract

The sorption of lead (II) and cadmium (II) on seven shales belonging to the Proterozoic Vindhyan basin, central India, and a black cotton soil, Mumbai, India, was studied and compared with sorbent geochemistry. The sorption equilibrium studies were conducted under completely mixed conditions in batch reactors (pH=5.0 and ionic strength= 0.01 M) at room temperature. The Freundlich model provided better fits to the experimental data compared to Langmuir model. High cadmium and lead sorption was observed for the calcareous shales with greater than 5% CaCO3. The Freundlich isotherm parameter relating to sorption capacity, i.e., KF, yielded a strong correlation with the calcium carbonate and calcium oxide content across the various geosorbents studied. The observed sorption pattern may be attributed to complex formation of CaCO3 with Pb2+ and Cd2+ leading to surface precipitation. Moreover, the Ca2+ present in the sorbents may also involve in ion exchange reaction with lead and cadmium.

Report this publication

Statistics

Seen <100 times