An evaluation of the bioavailability and bioaccumulation of selected metals
occurring in a wetland area on the volcanic island of Guam,
Western Pacific Ocean |
| |
Authors: | Bob Wilson Brian Pyatt and Gary Denton |
| |
Institution: | 1. School of Science and Technology,Nottingham Trent University,Clifton Lane,Nottingham,NG11 8NS,UK 2. Water and Environmental Research Institute of the Western Pacific,University of Guam,UOG Station,Mangilao,Guam 62923,USA |
| |
Abstract: | This initial research examined the presence, distribution and bioavailability of Cu, Cr, Ni, Mn and Fe in a wetland area of southern
Guam. The research sites are within an area covered with saporite, a soil type derived from volcanic deposits on the island. Leaf tissue
of Pandanus tectorius was extracted and analysed to determine the bioaccumulation of the target metals. Metal accumulation at sites
considered aerobic and anaerobic was investigated together with an attempt to correlate actual accumulation of the target metals in the
plant tissue with a recognised bioavailability indicator, in this case, three step sequential extraction scheme. Manganese was found to be
accumulated in relatively high concentrations and to a lesser extent Cu was also accumulated. Chromium, Ni and Fe however exhibited
very low accumulation factors. Accumulation of Mn in particular was significantly a ected by aerobic conditions whereas the converse
e ect was experienced by Cu. Significant correlation between various steps of a Sequential Extraction Scheme and actual accumulation
was not achieved although the degree of aerobic conditions at each site and soil pH did a ect concentrations of metals extracted by
di ering steps of SES. Results obtained suggest that further research in the area should be undertaken using di erent plant species and
tissues. |
| |
Keywords: | Guam bioaccumulation sequential extraction bioavailability accumulation factor heavy metals |
本文献已被 维普 万方数据 ScienceDirect 等数据库收录! |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|