• 关键词：镰刀菌属  铅  吸附

• 基金项目：国家重点基础研究发展计划(973)项目(No.2007CB815601)

• 杨亮
• 北京大学地球与空间科学学院造山带与地壳演化重点实验室, 北京 100871

• 郝瑞霞
• 北京大学地球与空间科学学院造山带与地壳演化重点实验室, 北京 100871

• 吴沣
• 北京大学地球与空间科学学院造山带与地壳演化重点实验室, 北京 100871

• 肖育雄
• 北京大学地球与空间科学学院造山带与地壳演化重点实验室, 北京 100871

• 摘要：从铅锌矿周围土壤样品中分离、筛选出一株耐铅真菌(命名为PY),对菌株进行了形态观察、生理生化实验及18SrRNA序列分析,并对该菌株的生物吸附性能进行了分析试验.结果表明,菌株PY为镰刀菌属(JQ267373),该菌株在Pb²⁺浓度550mg·L^-1、湿菌量10g·L^-1、pH=5.5、25℃、160r·min^-1的条件下振荡吸附75min时,对Pb²⁺的吸附率可达到84%,吸附量为46.2mg·g^-1.在Pb²⁺浓度为750mg·L^-1时,其吸附率为77.9%.在25℃时,菌株PY对Pb²⁺的吸附模型符合Langmuir和Freundlich吸附等温方程.

• Abstract：A lead-tolerant fungus strain (PY) was isolated from soil around the lead-zinc ore deposit.The morphological features,biochemical and physiological characteristics and 18S rRNA sequences of the strain were studied.Results indicated that PY belonged to Fusarium sp.(JQ267373).The biosorption experimental results of the strain to Pb²⁺ showed when Pb²⁺ concentration was 550 mg·L^-1,biomass was 10 g·L^-1 and pH was 5.5,the adsorption rate and adsorption capacity of the strain to Pb²⁺ was 84% and 46.2 mg·g^-1,respectively,at 25℃,160 r·min^-1 with 75min.The adsorption rate was up to 77.9% when Pb²⁺ concentration was 750 mg·L^-1.The adsorption models of strain PY to Pb²⁺ at 25℃ were described with Langmuir and Freundlich isotherm.

• Key words：Fusarium sp.  lead  absorption

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