Misheer Natasha, Kindness A, Jonnalagadda S B
School of Chemistry, Westville Campus, University of KwaZulu-Natal, Durban, South Africa.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2006;41(6):1249-59. doi: 10.1080/10934520600623158.
The elemental uptake by Ulva lactuca (Sea lettuce), a marine macro-algae (chlorophyta, green alga) grown richly along KwaZulu-Natal coastline. The total elemental concentrations of seven important elements, namely manganese, iron, arsenic, boron, titanium, zinc and mercury, selected based on their abundance in U. lactuca were investigated for one year cycle (June 2002 to May 2003). The four selected sampling sites, Zinkwasi, Ballito, Treasure Beach and Park Ryrie are spread over 150 km wide along the KwaZulu-Natal coastline from North to South. The Ulva lectuca possess good manganese and arsenic accumulating ability and an excellent bio-indicator for most of the metals studied. A typical U. lectuca sample at Zinkwasi (in winter) recorded Mn (25.3 +/- 1.16 ppm), Fe (21.0 +/- 0.85 ppm), As (6.2 +/- 0.30 ppm), B (935 +/- 14 ppb), Ti (863 +/- 34 ppb), Zn (421 +/- 21 ppb), and Hg (61.3 +/- 1.2 ppb). The general trend found at all sites was high elemental concentrations in winter and a decrease in concentrations from winter to spring and summer. Iron uptake was lowest in summer and autumn at all sites. Ulva lactuca recorded highest mercury levels (>400 ppb) during the spring season at the Treasure Beach site near Durban.
石莼（海莴苣）对元素的吸收，石莼是一种在夸祖鲁 - 纳塔尔海岸大量生长的海洋大型藻类（绿藻门，绿藻）。基于石莼中元素的丰度选择了七种重要元素，即锰、铁、砷、硼、钛、锌和汞，并对其总元素浓度进行了为期一年的研究（2002年6月至2003年5月）。选定的四个采样地点，津夸西、巴利托、宝藏海滩和帕克里里，从北到南沿着夸祖鲁 - 纳塔尔海岸分布在150公里宽的区域内。石莼具有良好的锰和砷积累能力，是所研究的大多数金属的优良生物指示物。在津夸西（冬季）的一个典型石莼样本记录的锰含量为（25.3±1.16 ppm）、铁含量为（21.0±0.85 ppm）、砷含量为（6.2±0.30 ppm）、硼含量为（935±14 ppb）、钛含量为（863±34 ppb）、锌含量为（421±21 ppb）、汞含量为（61.3±1.2 ppb）。在所有地点发现的总体趋势是冬季元素浓度较高，从冬季到春季和夏季浓度降低。在所有地点，夏季和秋季的铁吸收量最低。在德班附近的宝藏海滩站点，石莼在春季记录到最高汞含量（>400 ppb）。
