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ID:9050264
大小:1.01 MB
页数:24页
时间:2018-04-16
《毕业论文-衡水湖湿地香蒲对重金属富集作用研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、密级公开学号______学院毕业论文衡水湖湿地香蒲对重金属富集作用研究论文作者:指导教师:系别:专业:生物科学年级:提交日期:答辩日期:毕业论文学术承诺本人郑重承诺:所呈交的毕业论文是本人在导师指导下进行的研究工作及取得的研究成果。除了文中特别加以标注和致谢的地方外,论文中不存在抄袭情况,论文中不包含其他人已经发表的研究成果,也不包含他人或其他教学机构取得的研究成果。作者签名:日期:毕业论文使用授权的说明本人了解并遵守学院有关保留、使用毕业论文的规定。即:学校有权保留或向有关部门送交毕业论文的原件或复印件,允许论文被查阅和借阅;学校可以公开论文的全部或部分内容,可以采用影印、
2、缩印或其他复制手段保存论文及相关资料。作者签名:指导教师签名:日期:日期:2011级生物科学专业毕业论文论文题目:衡水湖湿地香蒲对重金属富集作用研究摘要:本文利用微波消解法、火焰原子吸收分光光度计法研究衡水湖湿地常见水生植物香蒲中不同部位的金属Cu和Pb的含量,了解衡水湖水体污染状况,植物富集重金属的特性,探讨香蒲对环境中重金属的富集作用,以其选择适合重金属修复的植物,为衡水湖的生态修复提供科学依据和基础材料。研究发现:香蒲植株不同器官对同一重金属的富集能力不同,表现为根>茎叶;同一器官对不同金属的富集能力也不同,表现为Pb>Cu;pH值以及温度均能影响香蒲对重金属的富集作用
3、,在一定范围内香蒲对重金属的富集能力随着pH值、温度的升高而增加。为避免香蒲的二次污染,要对香蒲进行定期清理。关键字:衡水湖湿地;香蒲;重金属富集I李敏婧:衡水湖湿地香蒲对重金属富集作用研究TITLE:THeStudyonHeavyMetalAccumulationofTyphaorientalisinHengshuiLakeWetlandsAbstract:ThissubjectisaboutonthecontentsofCuandPbindifferentpartsofTyphaorientalistostudyheavymetalaccumulationbymicrow
4、avedigestionandatomicabsorptionspectrootometermethod,thatwouldbeknownwaterpollutionofHengshuiLakeandpropertiesofheavymetalaccumulationbyplants.ThestudywouldofferscientificbasistoslectsuitableplantinordertorecovertheecologicalenvironmentofHengshuiLake.Theresultshowedthatenrichmentabilityofdi
5、fferentorganswasdifferent,presentedasroot>leaf.EnrichmentabilityofPbisgreaterthanCuinthesameorgan.TheheavymetalaccumulationwouldincreasewiththeincreaseoftemperatureandpHvalueinacertainrange.TheTyphaorientalisneedbeharvestedtopreventfrompollutingagain.Keywords:HengshuiLakeWetland;Typhaorient
6、alis;HeavymetalaccumulationII2011级生物科学专业毕业论文目录摘要·····································································································································IAbstract·····································································································
7、·····························II1绪论····································································································································12材料与方法·················································································
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