Abstract:

Remediation of heavy metal contaminated soils using clay minerals is an in-situ remediation technology. The technology was intend to realize the chemical remediation by adding clay metals to polluted soils. The clay minerals can reduce the mobility and bioavailability of the heavy metals by adsorption, complexation and coprecipitation et al, and reduce the transference of the heavy metals to water, plant and other environment units. Clay minerals play an irreplaceable role in the treatment of heavy metal polluted soils. This process was superior to the traditional process in abundant resources, simplified operation and rapid repairing process. The mechanisms and repairing effects of remediation were discussed. Test and evaluation methods of the technology were introduced. The paper points out the application prospects and existing problems of the clay minerals, and then puts forward some suggestions for future work in the end.