The Robert M. Buchan Department of Mining, Queen's University, Goodwin Hall, Kingston, ON, K7L 3N6, Canada.
Department of Chemical Engineering, Queen's University, Dupuis Hall, Kingston, ON, Canada.
Environ Sci Pollut Res Int. 2018 Jun;25(18):17393-17401. doi: 10.1007/s11356-018-1877-6. Epub 2018 Apr 13.
Polyamines such as triethylenetetramine (TETA) and other amine chelators are used in mineral processing applications. Formation of heavy metal complexes of these reagents as a by-product in effluent water is a recent environmental concern. In this study, Paecilomyces sp. was enriched from soil on TETA as the sole source of carbon and nitrogen and was found to degrade > 96 and 90% CuTETA complexes at initial concentrations of 0.32 and 0.79 mM respectively, following 96-h incubation. After destabilization, most of the copper (> 78%) was complexed extracellularly and the rest was associated with the cell. Mass spectroscopy results provided confirmation that copper re-complexed with small, extracellular, and organic molecules. There are no reports in the literature that Paecilomyces or any other organism can grow on TETA or CuTETA. This study is the first to show that biological destabilization of CuTETA complexes in mineral processing effluents is feasible.
多胺，如三亚乙基四胺（TETA）和其他胺类螯合剂，在矿物加工应用中被使用。这些试剂在废水中形成重金属配合物，是最近出现的环境问题。在这项研究中，从 TETA 上的土壤中富集了棘孢木霉，TETA 是唯一的碳源和氮源，发现在 96 小时的孵育后，初始浓度分别为 0.32 和 0.79mM 的 CuTETA 配合物分别降解了>96%和 90%。失稳后，大部分铜（>78%）与细胞外的小分子、有机分子重新形成配合物。文献中没有报道棘孢木霉或任何其他生物可以在 TETA 或 CuTETA 上生长。本研究首次表明，生物失稳矿物加工废水中的 CuTETA 配合物是可行的。
