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河道沉积物中重金属的生态修复及根际细菌的原位检测

王蕾 祁佩时 辛明

王蕾, 祁佩时, 辛明, . 河道沉积物中重金属的生态修复及根际细菌的原位检测[J]. 华东师范大学学报(自然科学版), 2012, (1): 1-10, 36.
引用本文: 王蕾, 祁佩时, 辛明, . 河道沉积物中重金属的生态修复及根际细菌的原位检测[J]. 华东师范大学学报(自然科学版), 2012, (1): 1-10, 36.
WANG Lei, QI Pei-shi, XIN Ming, . Phytoremediation of heavy metals and rhizosphere detection of bacteria in a drainage river sediment[J]. Journal of East China Normal University (Natural Sciences), 2012, (1): 1-10, 36.
Citation: WANG Lei, QI Pei-shi, XIN Ming, . Phytoremediation of heavy metals and rhizosphere detection of bacteria in a drainage river sediment[J]. Journal of East China Normal University (Natural Sciences), 2012, (1): 1-10, 36.

河道沉积物中重金属的生态修复及根际细菌的原位检测

详细信息
  • 中图分类号: Q945

Phytoremediation of heavy metals and rhizosphere detection of bacteria in a drainage river sediment

  • 摘要: 调查分析了哈尔滨某排污河道化工区段表层沉积物中的重金属(Pb、Zn、Cr、As、Ni、Cu和Cd)含量,通过盆栽试验研究了4种当地具有金属耐性的植物(玉米、酸模叶蓼、龙葵和酸模)对受污染的河道沉积物中重金属的修复效果,进而调查了这4种植物对重金属赋值形态的影响、富集能力及重金属的转运能力.结果显示,排污河道沉积物受到多种重金属的复合污染.表层沉积物中重金属经过两季植物修复后,7种重金属的残渣态均有不同程度的减少,并且金属形态逐渐向铁锰氧化态及可交换态转化,结果说明供试植物能够调节沉积物中重金属的生物有效性.重金属在沉积物中与在植物体内具有相同的总含量趋势:Zn>Pb>Ni>Cr>Cu>As>Cd,该趋势也反映出4种供试植物的生物监测潜能.植物对重金属表现出不同的吸收特性,4种植物对Zn和Ni的富集量相对较大,而Cu在植物地上部分的含量普遍较低,Zn和Ni在植物组织中的含量范围分别为108.4~543.92 mg/kg和36.8~246.91 mg/kg.总体来说,这4种植物主要将金属元素积累在根部,而非地上部分,表现出对重金属的耐受性.酸模叶蓼、酸模和龙葵这3种植物的地上部分分别积累了高浓度的Pb、Zn和Cd,并且具有较高的转运系数(TF1),反映出这3种植物对相应的重金属具有植物提取的潜力.采用荧光原位杂交(fluorescence in situ hybridization, FISH)技术,分析对照和经过栽培试验后根际沉积物中真细菌的数量和空间分布,结果表明植物对沉积物中的细菌有明显的活化作用.
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出版历程
  • 收稿日期:  2010-11-01
  • 修回日期:  2011-01-01
  • 刊出日期:  2012-01-25

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