In-Situ-Remediation of Pb/Zn Contaminated Sites Infl uenced by Mining and Processing

In the EU-project (GREENLAND, Gentle Remediation of trace element contaminated land,FP7-KBBE-266124) “best-practice” examples for remediation and re-use of heavy metal contaminated sites are brought together in an exchange of experiences. This exchange and collaboration will contribute to a final handbook which intends to form a basis and guideline for the remediation of such sites. Three stages of impact of Pb/Zn-ore-treatment on the environment are discussed here:(1) On sites where the ores are mined impacts are the result of crushing, grinding, concentrating activities, and where additionally parts of the installations remain after abandoning the mine, aswell as by the massive amounts of remaining deposits or wastes (mine tailings).(2) On sites where smelting and processing takes place, depending on the process (Welz, Doerschel)different waste materials are deposited. The Welz process waste generally contains less Cd and Pb than the Doerschel process waste which additionally shows higher water- extractable metals.