Remediation of soils contaminated with metals

摘要

Valgo is a company dedicated to soil remediation works and decontamination of mainly asbestos from building sites. Several years ago, in collaboration with ECOLAB (a laboratory, part of an institute for agronomy in Toulouse) a study began into the possibilities of removing pollutants from contaminated solid using hyper-accumulators. These are plants that are able to grow in soils with high metals content, and then to accumulate these metals in their roots, shoots or leaves. This process is reported to be very slow, reaching remediation goals in one or more centuries.