TY - JOUR
T1 - Heavy metal and nutrient contamination of marine sediments in Hong Kong
AU - Wong, J. W.C.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1996
Y1 - 1996
N2 - A monitoring programme was performed to use marine sediments as an indicator of marine contamination in Hong Kong. A total of 51 samples were collected from eight marine sites and analysed for pH, redox potential, salinity, total-N, total-P, total organic carbon, and total Cu, Zn Pb, Cr and Cd. Sites with high industrial or aquacultural activities contained high total organic carbon contents, total-N and total-P contents. Sediments from sites with high industrial activities also enriched with heavy metals. Metal speciation results indicate that Cu and Cr existed mainly in the organic fraction, Pb and Zn were distributed approximately equally in both the organic and residual fractions while Cd mainly occurred in the residual fraction. The Cu, Cr and Zn contents were highly correlated with total organic carbon contents. All samples were classified as non-acid forming according to the net acid generation test and only samples from the industrial site released a high concentration of heavy metals under a complete oxidising condition. The present study reveals that organic and heavy metal pollution is serious in the manne sediments of Hong Kong, and industrial and aquacultural activities are probably the major sources of contamination.
AB - A monitoring programme was performed to use marine sediments as an indicator of marine contamination in Hong Kong. A total of 51 samples were collected from eight marine sites and analysed for pH, redox potential, salinity, total-N, total-P, total organic carbon, and total Cu, Zn Pb, Cr and Cd. Sites with high industrial or aquacultural activities contained high total organic carbon contents, total-N and total-P contents. Sediments from sites with high industrial activities also enriched with heavy metals. Metal speciation results indicate that Cu and Cr existed mainly in the organic fraction, Pb and Zn were distributed approximately equally in both the organic and residual fractions while Cd mainly occurred in the residual fraction. The Cu, Cr and Zn contents were highly correlated with total organic carbon contents. All samples were classified as non-acid forming according to the net acid generation test and only samples from the industrial site released a high concentration of heavy metals under a complete oxidising condition. The present study reveals that organic and heavy metal pollution is serious in the manne sediments of Hong Kong, and industrial and aquacultural activities are probably the major sources of contamination.
KW - Aquaculture
KW - Heavy metal
KW - Industrial effluents
KW - Marine sediment
KW - Nutrients
UR - http://www.scopus.com/inward/record.url?scp=0030019210&partnerID=8YFLogxK
U2 - 10.1080/02772249609358282
DO - 10.1080/02772249609358282
M3 - Journal article
AN - SCOPUS:0030019210
SN - 0277-2248
VL - 53
SP - 175
EP - 189
JO - Toxicological and Environmental Chemistry
JF - Toxicological and Environmental Chemistry
IS - 1-4
ER -