Biology Department, College of Science, King Khalid University, Abha, 61321, Saudi Arabia.
Applied Plant Ecology, Biocenter Klein Flottbek and Botanical Garden, Hamburg University, Ohnhorststraße 18, 22609, Hamburg, Germany.
Bull Environ Contam Toxicol. 2021 Mar;106(3):516-527. doi: 10.1007/s00128-021-03120-y. Epub 2021 Feb 6.
In the current work, we investigated the concentration of Ni and Pb in different organs of Phragmites australis to evaluate its potential application as a phytoremediator to remove these two metals from contaminated water and sediment in Lake Burullus (a Ramsar site in Egypt). Above- and below-ground biomass of P. australis, water and sediment were sampled monthly for 1 year at six sites of Lake Burullus (three sites represent each of the northern and southern parts of the lake) using six randomly distributed quadrats (each of 0.5 × 0.5 m) at each sampling site. Significant variation was detected for Ni and Pb concentrations in the sediments and waters between the northern and southern sites of the lake. The biomass of P. australis in the southern sites was greater than that in the northern sites; in addition, the above-ground biomass was higher than the below-ground biomass. The above-ground organs accumulated higher concentrations of Ni and Pb than the below-ground organs. The Ni and Pb standing stocks data indicated that the organs of P. australis extracted higher amounts of Ni and Pb per its area from the southern rather than the northern sites. In the current study, the Ni and Pb above-ground standing stocks increased from the early growing season (February) and reached its peak during August and then decreased. The highest monthly Ni and Pb standing stock (18.2 and 18.4 g m, respectively) was recorded in the above-ground organs of plants in the southern sites in August. The bioaccumulation factor of Ni was 157.6 and 153.4 in the northern and southern sites, respectively, whereas that of Pb was 175.3 and 158.3. The translocation factor of Ni and Pb from the below- to above-ground organs was generally > 1. Thus, this reed species is a potential candidate for Ni and Pb phytoextraction. Based on our results, P. australis could be used for the extraction of Ni and Pb to reduce the pollution in Lake Burullus, if the above-ground biomass is harvested at its maximum value in August, as was the case regarding the maximum standing stock of Ni and Pb.
在本研究中，我们调查了芦苇（一种在埃及的布尔卢斯湖的拉姆萨尔湿地）不同器官中镍和铅的浓度，以评估其作为一种植物修复剂的潜力，用于从受污染的水中和沉积物中去除这两种金属。在布尔卢斯湖的六个地点（北部和南部各有三个地点），每月使用六个随机分布的四分体（每个四分体为 0.5×0.5 m）采集芦苇的地上和地下生物量、水和沉积物，进行了为期一年的采样。在湖泊的北部和南部站点之间，检测到沉积物和水中的镍和铅浓度存在显著差异。南部地点的芦苇生物量大于北部地点；此外，地上生物量高于地下生物量。地上器官积累的镍和铅浓度高于地下器官。镍和铅储量数据表明，与北部地点相比，南部地点的芦苇器官从其面积中提取了更多的镍和铅。在本研究中，从早春（二月）开始，地上镍和铅储量增加，到 8 月达到峰值，然后减少。8 月，南部地点植物地上器官记录到最高的每月镍和铅储量（分别为 18.2 和 18.4 g m）。镍的生物积累因子在北部和南部地点分别为 157.6 和 153.4，而铅的生物积累因子分别为 175.3 和 158.3。镍和铅从地下器官向地上器官的转移系数通常大于 1。因此，这种芦苇物种是镍和铅植物提取的潜在候选者。根据我们的结果，如果在 8 月收获地上生物量的最大值，就像镍和铅储量的最大值一样，那么芦苇可以用于提取镍和铅，以减少布尔卢斯湖的污染。
