Abstract. Due to operational and regulatory practicalities, pit lakes will continue to be common legacies of mine lease relinquishments.
Unplanned or inappropriate management of these geographical features can lead to both short- and long-term liability to mining
companies, local communities, and the nearby environment during mining operations or after lease relinquishment. However,
the potential for pit lakes to provide benefit to companies, communities, and the environment is frequently unrecognised and
yet may be a vital contribution to the sustainability of the open-cut mining industry. Sustainable pit lake management aims
to minimise short and long term pit lake liabilities and maximise short and long term pit lake opportunities. Improved remediation
technologies are offering more avenues for pit lakes resource exploitation than ever before, at the same time mining companies,
local communities, and regulatory authorities are becoming more aware of the benefit these resources can offer. 相似文献
This paper reports the findings of an investigation in which glucose mineralization by the benthic microbiota of acid-stressed Silver Lake, Ontario, Canada, was quantitated as a function of season. Attempts were also made to measure the mineralization response when the microbiota were subjected to near neutral pH conditions.
Comparisons made on the basis of Vmax values revealed that the heterotrophic potential varied according to season, being lowest during the winter and highest during the summer. Also, an unexpected decrease in heterotrophic potential was realized for all samplings at an experimental, circumneutral pH. These results, in combination with observed, higher bacterial cell counts at the experimental pH, indicate that a fraction of the heterotrophic population is incapable of glucose mineralization at the higher pH, and are evidence of the existence of acidophilic bacteria in acid-stressed aquatic environments. Pre-incubation studies showed that the differences in heterotrophic potentials persisted for up to 15 days, the longest pre-incubation period examined. 相似文献