TY - JOUR
T1 - Effects of wastewater discharge on formation of Fe plaque on root surface and radial oxygen loss of mangrove roots
AU - Pi, N.
AU - Tam, N. F.Y.
AU - Wong, M. H.
N1 - Funding Information:
The work described in this paper was supported by a grant from the University Grants Committee of the Hong Kong SAR, China (Project No. CityU1406/06M).
PY - 2010/2
Y1 - 2010/2
N2 - 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.
AB - 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.
KW - Fe plaque
KW - Radial oxygen loss
KW - Root anatomy
KW - Wastewater
UR - http://www.scopus.com/inward/record.url?scp=74249115149&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2009.09.004
DO - 10.1016/j.envpol.2009.09.004
M3 - Journal article
C2 - 19782449
AN - SCOPUS:74249115149
SN - 0269-7491
VL - 158
SP - 381
EP - 387
JO - Environmental Pollution
JF - Environmental Pollution
IS - 2
ER -
