Effects of wastewater discharge on formation of Fe plaque on root surface and radial oxygen loss of mangrove roots

N. Pi, N. F Y Tam, M. H. Wong

    Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

    71 Citations (Scopus)

    Abstract

    Effects of wastewater discharge on radial oxygen loss (ROL), formation of iron (Fe) plaque on root surface, and their correlations in Bruguiera gymnorrhiza (L.) Poir and Excoecaria agallocha L. were investigated. ROL along a lateral root increased more rapidly in control than that in strong wastewater (with pollutant concentrations ten times of that in municipal sewage, 10NW) treatment, but less Fe plaque was formed in control for both plants. For B. gymnorrhiza receiving 10NW, Fe plaque formation was more at basal and mature zones than at root tip, while opposite trend was shown in E. agallocha. At day 0, the correlation between ROL and Fe plaque was insignificant, but negative and positive correlations were found in 10NW and control, respectively, at day 105, suggesting that more ROL was induced leading to more Fe plaque. However, excess Fe plaque also served as a 'barrier' to prevent excessive ROL in 10NW plants. © 2009 Elsevier Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)381-387
    JournalEnvironmental Pollution
    Volume158
    Issue number2
    DOIs
    Publication statusPublished - Feb 2010

    Research Keywords

    • Fe plaque
    • Radial oxygen loss
    • Root anatomy
    • Wastewater

    Fingerprint

    Dive into the research topics of 'Effects of wastewater discharge on formation of Fe plaque on root surface and radial oxygen loss of mangrove roots'. Together they form a unique fingerprint.

    Cite this