Distribution and speciation of copper in rice (Oryza sativa L.) from mining-impacted paddy soil: Implications for copper uptake mechanisms

被引:58
作者
Cui, Jin-li [1 ,2 ]
Zhao, Yan-ping [1 ]
Lu, Ying-jui [3 ]
Chan, Ting-shan [3 ]
Zhang, Li-li [4 ]
Tsang, Daniel C. W. [1 ]
Li, Xiang-dong [1 ]
机构
[1] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
[2] Guangzhou Univ, Sch Environm Sci & Engn, Minist Educ, Key Lab Water Qual & Conservat Pearl River Delta, Guangzhou, Guangdong, Peoples R China
[3] Natl Synchrotron Radiat Res Ctr, 101 Hsin Ann Rd,Hsinchu Sci Pk, Hsinchu 30076, Taiwan
[4] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
关键词
Speciation and mobilization; Paddy soil; Heavy metal remediation; Tolerance and detoxification; Synchrotron-based X-ray absorption spectroscopy; HEAVY-METAL DETOXIFICATION; PEARL RIVER DELTA; IRON PLAQUE; AGRICULTURAL SOILS; ISOTOPIC FRACTIONATION; ROOT ENDODERMIS; TYPHA-LATIFOLIA; DABAOSHAN MINE; EXCESS COPPER; FOOD CROPS;
D O I
10.1016/j.envint.2019.02.045
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Long term mining activities can cause significant metal pollution in the environment, thereby showing potential risk to the paddy field. Elucidating the interfacial processes of trace metals from contaminated paddy soil to rice within the rhizosphere can provide important information on metal biogeochemistry and food safety. The current study aims to explore the spatial distribution and molecular speciation of Cu from rhizosphere to rice plant in a mining-impacted paddy soil, and reveal the possible uptake mechanisms. X-ray absorption near edge structure (XANES) analysis indicated that Cu was primarily associated with iron oxide and sulfide in soil with a minor proportion of organic complexed species. In the rice samples, Cu showed much higher concentrations in the roots than the shoots, as most Cu was sequestered in the root surface and epidermis (primarily in the form of C/N ligands bound Cu species), rather than root xylem, as identified by micro X-ray fluorescence (mu-XRF) imaging coupling with mu-XANES. By contrast, in the root xylem, thiol-S bound Cu(I) complex was observed, representing the reduced product of Cu(II) by thiol-S ligands in rice root. The absorbed Cu was probably transported from the root to the aerial part as C/N ligand bound Cu complex such as Cu-histidine like species, which was observed in the root xylem. The large retention capacity and reduction of Cu(II) in rice root alleviated Cu toxicity to rice, which was beneficial for food safety (e.g., lower concentration of Cu in rice grains). These findings showed for the first time that the uptake mechanisms by rice from field contaminated sites, which shed light on Cu detoxification process and potential remediation strategies.
引用
收藏
页码:717 / 726
页数:10
相关论文
共 79 条
  • [31] Characterization of Fe plaque and associated metals on the roots of mine-waste impacted aquatic plants
    Hansel, CM
    Fendorf, S
    Sutton, S
    Newville, M
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2001, 35 (19) : 3863 - 3868
  • [32] Characteristics of metal removal using carboxylated alginic acid
    Jeon, C
    Park, JY
    Yoo, YJ
    [J]. WATER RESEARCH, 2002, 36 (07) : 1814 - 1824
  • [33] Stable Isotopes of Cu and Zn in Higher Plants: Evidence for Cu Reduction at the Root Surface and Two Conceptual Models for Isotopic Fractionation Processes
    Jouvin, D.
    Weiss, D. J.
    Mason, T. F. M.
    Bravin, M. N.
    Louvat, P.
    Zhao, F.
    Ferec, F.
    Hinsinger, P.
    Benedetti, M. F.
    [J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2012, 46 (05) : 2652 - 2660
  • [34] X-RAY ABSORPTION-EDGE DETERMINATION OF THE OXIDATION-STATE AND COORDINATION-NUMBER OF COPPER - APPLICATION TO THE TYPE-3 SITE IN RHUS-VERNICIFERA LACCASE AND ITS REACTION WITH OXYGEN
    KAU, LS
    SPIRASOLOMON, DJ
    PENNERHAHN, JE
    HODGSON, KO
    SOLOMON, EI
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1987, 109 (21) : 6433 - 6442
  • [35] Synchrotron-based X-Ray Approaches for Examining Toxic Trace Metal(loid)s in Soil-Plant Systems
    Kopittke, Peter M.
    Wang, Peng
    Lombi, Enzo
    Donner, Erica
    [J]. JOURNAL OF ENVIRONMENTAL QUALITY, 2017, 46 (06) : 1175 - 1189
  • [36] In Situ Distribution and Speciation of Toxic Copper, Nickel, and Zinc in Hydrated Roots of Cowpea
    Kopittke, Peter M.
    Menzies, Neal W.
    de Jonge, Martin D.
    McKenna, Brigid A.
    Donner, Erica
    Webb, Richard I.
    Paterson, David J.
    Howard, Daryl L.
    Ryan, Chris G.
    Glover, Chris J.
    Scheckel, Kirk G.
    Lombi, Enzo
    [J]. PLANT PHYSIOLOGY, 2011, 156 (02) : 663 - 673
  • [37] Plant-soil interactions in metal contaminated soils
    Krumins, Jennifer Adams
    Goodey, Nina M.
    Gallagher, Frank
    [J]. SOIL BIOLOGY & BIOCHEMISTRY, 2015, 80 : 224 - 231
  • [38] Heavy metal contamination of urban soils and street dusts in Hong Kong
    Li, XD
    Poon, CS
    Liu, PS
    [J]. APPLIED GEOCHEMISTRY, 2001, 16 (11-12) : 1361 - 1368
  • [39] Speciation and Biochemical Transformations of Sulfur and Copper in Rice Rhizosphere and Bulk Soil-XANES Evidence of Sulfur and Copper Associations
    Lin, Huirong
    Shi, Jiyan
    Wu, Bei
    Yang, Jianjun
    Chen, Yingxu
    Zhao, Yidong
    Hu, Tiandou
    [J]. MOLECULAR ENVIRONMENTAL SOIL SCIENCE AT THE INTERFACES IN THE EARTH'S CRITICAL ZONE, 2010, : 69 - 71
  • [40] Role of iron plaque in Cd uptake by and translocation within rice (Oryza sativa L.) seedlings grown in solution culture
    Liu, H-J
    Zhang, J. -L.
    Zhang, F-S.
    [J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY, 2007, 59 (03) : 314 - 320