除锰微生物的筛选及其除锰特性研究

Screening of manganese-resistant microorganism and their characteristics on Mn^(2+) ion removal

从锰矿污染区土壤中筛选得到了3株锰抗性强的杆菌(2、3、80号),并测试了菌株抗Mn2+和去除Mn2+的性能。结果表明,在低浓度范围内,Mn2+对筛选菌种的生长有促进作用,而在高Mn2+浓度点上,Mn2+抑制菌体生长,菌种抗Mn2+性能有一定差异,80号菌耐受性最强。在测试的最低Mn2+浓度(16 mg/L)点上,3号菌种的去除率最高(82.6%),其次是2号(72.3%),80号最低(64.1%);在测试的最高Mn2+浓度(2 000 mg/L)点上,80号菌种去除率最高(41.0%),其次是2号(22.0%),3号最低(18.3%),在Mn2+浓度200 mg/L点上,单一菌种和混合菌样本Mn2+的去除率最高(>90%)。试验结果表明,筛选的菌种在锰污染土壤的修复和含锰废水的处理中具有良好的应用前景。

Three manganese-resistant strains（No.2,3 and 80）were isolated from soil samples collected from manganese mining area.The characteristics of the isolated strains with respect to manganese tolerance and removal were studied.The results show that the presence of Mn2＋ ion enhanced the growth of the strains at low Mn2＋ concentration levels but inhibit that at high concentration levels.In comparison,No.80 tolerated higher Mn2＋ ion concentration than the other two strains.At the lowest tested Mn2＋ concentration level（16 mg/L）,No.3 strain gave the highest Mn2＋ ion removal rate（82.6%）,followed by No.2（72.3%）and No.80（64.1%）.At the highest Mn2＋ concentration level（2 000 mg/L）,No.80 gave the highest removal rate（41.0%）,followed by No 2（22.0%）and No.3（18.3%）.The highest Mn2＋ ion removal rate（〉90%） was obtained at the Mn2＋ ion concentration level of 200 mg/L in all single and mixed strain samples.The isolated manganese-resistant strains are of practical values in remediation of Mn-polluted soils and treatment of Mn-containing wastewaters.