全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

李氏禾修复重金属(Cr Cu Ni)污染水体的潜力研究

Keywords: 植物修复,李氏禾,重金属污染水体,,,

Full-Text   Cite this paper   Add to My Lib

Abstract:

李氏禾(LeersiaHexandraSwartz)是中国境内发现的第一种铬超富集植物。通过水培实验,评价了李氏禾对水中Cr、Cu、Ni的去除潜力。结果表明,李氏禾能够有效去除水体中的Cr、Cu、Ni污染物,重金属初始浓度分别为10和20mg·L-1的营养液,10d后Cr浓度降低到原子吸收分光光度法检出限以下,10d后Cu浓度降低到1.02mg·L-1和1.25mg·L-1,20d后Ni浓度降低到1.10和2.14mg·L-1。收获的植物根、茎、叶中重金属含量均较高,根中重金属含量显著高于茎、叶。单株生物量的比较结果表明,含Cr培养液中生长的李氏禾生物量与对照相比无显著减少(P>0.05),含Cu、Ni营养液中生长的李氏禾生物量均显著低于对照(P<0.05),表明李氏禾对Cr的耐性强于Cu和Ni。李氏禾适宜于湿生环境中生长,能对多种重金属产生大量富集,对Cr、Cu、Ni等重金属污染水体的修复表现出较强的潜力。

References

[1]  Shrivastava R, Upreti R K, Seth P K, et al. Effects of chromium on the immune system. FEMS Immunol Med[J]. Microbiol, 2002, 34:1-7.
[2]  Bonet A, Poschenrieder C, Barcelo J. Chromium Ⅲ-iron interaction in Fedeficient and Fe-sufficient bean plants:I. Growth and nutrient content[J]. Plant Nutr, 1991, 14:403-414.
[3]  Shanker A K, Cervantes C, Loza avera H, et al. Chromium toxicity in plants[J]. Environment International, 2005, 31 : 739-753.
[4]  Ouzounidou G, Mousbakas M, Karataglis S. Responses of maize (Zea mays L.) plants to copper stress:growth, mineral content and ultrastructure of roots[J]. Environ Experi Bot, 1995, 35(2 ) : 167-176.
[5]  McBride M B. Toxic metal accumulation from agricultural use of sludge: are USEPA regulations protective [J]. J Environ Qual, 1995, 24:5-18.
[6]  Knopfel M, Schulthess G, Funk F. Characterization of an integral protein of the brush border membrane mediating the transport of divalent metal ions[J]. Biophys J, 2000, 79 : 874-884.
[7]  Ouzounidou G. Copper-induced changes on growth, methal content and photosynthetic function of Alyssum montanum Plants[J]. Environ Experi Botany, 1994, 34(2) : 165-172.
[8]  Cangul H, Broday L, Salnikow K, et al. Molecular mechanisms of nickel carcinogenesis[J]. Toxicology Letters, 2002, 127, 69-75.
[9]  Kasprzak K S, Sunderman F W, Salnikow K. Nickel carcinogenesis[J]. Mutat Res, 2003, 533: 67-97.
[10]  Wataha J C, Lockwood P E, Schedle A, et al. Ag, Cu, Hg and Ni ions alter the metabolism of human monocytes during extended low-dose exposures[J]. J Oral Rehabil, 2002, 29:133-139.
[11]  Robinson B, Duwing C, Bolan N, et al. Uptake of arsenic by New Zealand watercress ( Lepidium sativum ) [J]. The Science of the total Environment, 2003, 301:67-73.
[12]  薛生国.[D].浙江:浙江大学,2005:82-94.
[13]  陈同斌 韦朝阳 等.砷超富集植物是蜈蚣草及其对砷的富集特征[J].科学通报,:.
[14]  孙约兵 周启星 郭关林.植物修复重金属污染土壤的强化措施[J].环境工程学报,2007,1(3):103-109.
[15]  张学洪,罗亚平,黄海涛,等.一种新发现的湿生铬超积累植物,李氏禾 (Leersia hexandra Swartz)[J].生态学报,2006,26(3):950-953.
[16]  Zhang X H, Liu J, Huang H T, et al. Chromium accumulation by the hyperaccumulator plant Leersia hexandra Swartz[J]. Chemosphere, 2007, 67:1138-1143.
[17]  张学洪 陈俊 李海翔 等.铬超富集植物李氏禾对铜的富集特征研究[J].农业环境科学学报,2008,27(2):521-524.
[18]  薛生国 陈英旭 骆永明 RogerDReeves 林琦.商陆(Phytolacca acinosa Roxb.)的锰耐性和超积累[J].土壤学报,2004,41(16):889-894.
[19]  Raskin L, Smith R D, Salt D E. Phytoremediation of metals:using plants to remove pollutants from the environment[J]. Curr Opin Biotechnol, 1997, 8(2) :221-226.
[20]  Bennicelli R, Stezpniewska Z, Banach A, et al. The ability of Azolla caroliniana to remove heavy metals (Hg( Ⅱ ), Cr( Ⅲ ), Cr( Ⅵ ) ) from municipal wastewater[J]. Chemosphere, 2004, 55 : 141-146.
[21]  渠荣遴 李德森 杜荣骞 吴震州.水体重金属污染的植物修复研究(Ⅳ)——种苗过滤去除水中重金属铜[J].农业环境科学学报,:.
[22]  Rai D, Eary L E, Zachara J M. Environmental chemistry of chromium [J]. Sci Total Environ, 1989, 86:15-23.
[23]  Rai D, Sass B M, Moore D A. Cr( Ⅲ ) hydrolysis constants and solubility of Cr( Ⅲ ) hydroxide[J], lnorg. Chem, 1987, 26:345-349.
[24]  张学洪 陈俊 王敦球 等.李氏禾对镍的富集特征[J].桂林工学院学报,2008,28(1):98-101.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133