耐受铅真菌的筛选及其对Pb^(2+)吸附的初步研究  

Isolation of lead-tolerant fungus and the adsorption effect to Pb^(2+)

作　　者：杨亮[1] 郝瑞霞[1] 吴沣[1] 肖育雄[1] 

机构地区：[1]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

出　　处：《环境科学学报》2012年第10期2366-2374,共9页Acta Scientiae Circumstantiae

基　　金：国家重点基础研究发展计划(973)项目(No.2007CB815601)~~

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.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 Pb^2 ＋ 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 Pb^2 ＋ concentration was 750 mg·L^ - 1 . The adsorption models of strain PY to Pb^2 ＋ at 25 ℃ were described with Langmuir and Freundlich isotherm.

关 键 词：镰刀菌属 铅 吸附 

分 类 号：X703[环境科学与工程—环境工程]