TY - JOUR
T1 - Formation of iron plaque on mangrove roots receiving wastewater and its role in immobilization of wastewater-borne pollutants
AU - Pi, N.
AU - Tam, N. F.Y.
AU - Wong, M. H.
N1 - Funding Information:
The work described in this paper was supported by the Areas of Excellence Scheme established under the University Grants Committee of the Hong Kong SAR, China (Project No. AoE/P-04/2004).
PY - 2011
Y1 - 2011
N2 - Iron (Fe) plaque formed on mangrove root increased with wastewater discharge, but the extent was species-specific. For Bruguiera gymnorrhiza, Fe plaque concentration was 0.80mgg-1 root d.wt at Day 0 and increased to 4.59, 6.84 and 7.52mgg-1 at Day 75 in the fresh water control (FW), synthetic wastewater with pollutant concentrations five times of municipal sewage (5SW) and double of 5SW (10SW) treatments, respectively; the respective increases in Excoecaria agallocha were from 0.70 to 2.37, 10.73 and 13.21mgg-1. For Acanthus ilicifolius, similar increase was found in 5SW, but all of the plants were dead in 10SW at Day 75. The concentrations of heavy metals and phosphorus immobilized were positively correlated with the amounts of Fe plaque formed, but the regression coefficients varied among species. The performance of mangrove plants in wastewater treatments was related to the Fe plaque formed and its immobilized wastewater-borne pollutants.
AB - Iron (Fe) plaque formed on mangrove root increased with wastewater discharge, but the extent was species-specific. For Bruguiera gymnorrhiza, Fe plaque concentration was 0.80mgg-1 root d.wt at Day 0 and increased to 4.59, 6.84 and 7.52mgg-1 at Day 75 in the fresh water control (FW), synthetic wastewater with pollutant concentrations five times of municipal sewage (5SW) and double of 5SW (10SW) treatments, respectively; the respective increases in Excoecaria agallocha were from 0.70 to 2.37, 10.73 and 13.21mgg-1. For Acanthus ilicifolius, similar increase was found in 5SW, but all of the plants were dead in 10SW at Day 75. The concentrations of heavy metals and phosphorus immobilized were positively correlated with the amounts of Fe plaque formed, but the regression coefficients varied among species. The performance of mangrove plants in wastewater treatments was related to the Fe plaque formed and its immobilized wastewater-borne pollutants.
KW - A. ilicifolius
KW - B. gymnorrhiza
KW - E. agallocha
KW - Metals
KW - Nutrients
KW - Sewage
UR - http://www.scopus.com/inward/record.url?scp=79960346498&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2011.05.036
DO - 10.1016/j.marpolbul.2011.05.036
M3 - Article
C2 - 21704345
AN - SCOPUS:79960346498
SN - 0025-326X
VL - 63
SP - 402
EP - 411
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 5-12
ER -