Abstract

Papiliotrema huenov was previously reported to be highly tolerant of a range of extremely toxic heavy metals. This study aimed to identify the potential of P. huenov to remove manganese and copper from aqueous solution. Physical conditions which affect removal of Mn(II) and Cu(II) were determined. Optimal temperature for adsorption of both metal ions was 30 °C, and optimal pH for maximum uptake of Mn(II) and Cu(II) were 5 and 6, respectively. Under these conditions, living cells of P. huenov accumulated up to 75.58% of 110 mg/L Mn(II) and 70.5% of 128 mg/L Cu(II) over 120 h, whereas, the removal efficiency of metal ions by dead cells over 1 h was 60.3% and 56.5%, respectively. These results indicate that living cells are more effective than dead biomass for bioremediation, but that greater time is required. The experimental data extends the potential use of P. huenov in biosorption and bioaccumulation of toxic heavy metals to copper and manganese, two of the most common industrial contaminants.

摘要

之前曾报道过Papiliotrema huenov对一系列剧毒重金属具有高度耐受性。本研究旨在确定P. huenov从水溶液中去除锰和铜的潜力。确定了影响 Mn(II) 和 Cu(II) 去除的物理条件。吸附两种金属离子的最佳温度为 30 °C，最大吸收 Mn(II) 和 Cu(II) 的最佳 pH 值分别为 5 和 6。在这些条件下， P. huenov的活细胞在 120 小时内积累了 75.58% 的 110 mg/L Mn(II) 和 70.5% 的 128 mg/L Cu(II)，而死细胞在 1 小时内去除金属离子的效率分别为 60.3% 和 56.5% ， 分别。这些结果表明，对于生物修复而言，活细胞比死生物量更有效，但需要更长的时间。实验数据将P. huenov在有毒重金属的生物吸附和生物积累中的潜在用途扩展到铜和锰，这是两种最常见的工业污染物。