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AbstractEnvironmental issues related to past mining activities have become the subject of public interest only in the last 20-25years. Consequently, experience related to the mitigation and control of environmental pollution in mining areas is arecent development. The existing methods of remediation are often partially ineffective, especially when appliedwithout an in-depth geochemical and mineralogical study of the site. This paper reports on preliminary dataconcerning the effect of remediation actions in an arsenic-contaminated mine watershed (Baccu Locci mine – Italy) afew months from its completion. The persistence of the pre-remediation conditions raises some doubt on theeffectiveness of the undertaken remediation actions, even if more time is certainly needed to reach a newenvironmental steady state. Much remains to be learned about mistakes and successes of mine site remediation, andthe monitoring of the Baccu Locci area represents an opportunity to acquire new fundamental knowledge on thisissue.
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