多种水生植物对铀的富集特性对比研究
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摘要
本研究采集水生或者喜水植物12种,进行铀富集特性对比研究.对含铀废水的净化结果表明:满江红鱼腥藻对铀的富集能力最强,在修复25 d时,体系中铀的去除率达到97.7%,达到国家允许排放的标准;香蒲草在修复进行20 d以后,铀的去除率也超过92%.对铀富集特性的principal co-ordinates amalysis(PCo A)分析表明,满江红鱼腥藻和香蒲草、碎米沙草和白鹤芋、合果芋和水莎草、大薸和水葫芦对铀的富集特性是相似的.植物对铀毒害的耐受性监测表明,满江红鱼腥藻、合果芋和香蒲草等对铀的耐受性比较强.
In this study,twelve kinds of aquatic plants were collected and their uranium-accumulative performance were compared.The results of remediation for uranium waste water showed,the Azoila imbricate from the uranium tailings pond exerted the strongest accumulative capacity and the uranium removal had reached 97. 7%,and the cleaned water had reached below the national permission standard of uranium emission in 25 days. Also,the Typha orientalis showed a good accumulative capacity and tolerance,the uranium removalachieved 92.0% in 25 days. The PCo A analysis of the uranium adsorption characteristics showed that,Cyperus iria and Spathiph yllum kochii,Azoila imbricate and Typha orientalis,Syngonium podophyllum and Cyperus serotinus,Pistia stratiotes and Water hyacinth,showed the similar performance on the uranium enrichment respectively. The plant tolerance results showed,the Azoila imbricate,Syngonium podophyllum and Typha orientalis had a better uranium tolerance.
In this study,twelve kinds of aquatic plants were collected and their uranium-accumulative performance were compared.The results of remediation for uranium waste water showed,the Azoila imbricate from the uranium tailings pond exerted the strongest accumulative capacity and the uranium removal had reached 97. 7%,and the cleaned water had reached below the national permission standard of uranium emission in 25 days. Also,the Typha orientalis showed a good accumulative capacity and tolerance,the uranium removalachieved 92.0% in 25 days. The PCo A analysis of the uranium adsorption characteristics showed that,Cyperus iria and Spathiph yllum kochii,Azoila imbricate and Typha orientalis,Syngonium podophyllum and Cyperus serotinus,Pistia stratiotes and Water hyacinth,showed the similar performance on the uranium enrichment respectively. The plant tolerance results showed,the Azoila imbricate,Syngonium podophyllum and Typha orientalis had a better uranium tolerance.
引文
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[2]DANG D H,WANG W,PELLETIER P,et al.Uranium dispersion from U tailings and mechanisms leading to U accumulation in sediments:Insights from biogeochemical and isotopic approaches[J].Science of the total environment,2018,610-611:880-891.
[3]黄常,杨瑞丽,郭腾,等.苏丹草对铀的积累特征试验研究[J].南华大学学报(自然科学版),2015,29(3):21-24.
[4]汪萍,吕彩霞,盛青,等.含铀废水处理技术的研究进展[J].现代化工,2016,36(12):23-27.
[5]JUWARKAR A A,MISRA R R,SHARMA J K.Recent trends in bioremediation[J].Geomicro biology and biogeochemistry,2014,39:81-100.
[6]张晨.环境生物技术在环境污染控制中的应用[J].污染防治技术,2017,30(6):60-61.
[7]刘韬.香蒲对低浓度含铀废水处理效果的实验研究[D].衡阳:南华大学,2014.
[8]聂小琴,董发勤,丁德馨,等.两种土著水生植物对铀矿坑水的修复能力研究[J].原子能科学技术,2015,49(11):1946-1953.
[9]胡南,丁德馨,李广悦,等.五种水生植物对水中铀的去除作用[J].环境科学学报,2012,32(7):1637-1645.
[10]胡南,丁德馨,潘长春,等.铀在植物-微生物共生体系满江红体内的分布[J].南华大学学报(自然科学版),2014,28(4):18-22.
[11]JIANG X T,PENG X,DENG G H,et al.Illumina sequencing of 16S rRNA tag revealed spatial variations of bacterial communities in a mangrove wetland[J].Microbial ecology,2013,66(1):96-104.
[12]闫彩霞,张浩,李春娟,等.黄曲霉侵染后花生胚发育动态及抗感病相关种质群体结构[J].山东农业科学,2017,49(3):1-9.
[13]张翠琴.五角枫种群遗传多样性研究[D].临汾:山西师范大学,2015.