Saline Maharlu Lake in southern Iran is the outlet of Shiraz-Sarvestan basin, an inland flat lake, which its surroundings appear as wetland environment. The groundwater of the wetland area is polluted with heavy metals from the lake, and the wetland native plants grown in this area potentially have the tendency of uptaking the heavy metals from their rhizosphere environments. The lake is in hydraulic connection with its wetland groundwater and reverse hydraulic gradient results in movement of pollutants into the aquifers. This study aims to realize the wetland native plants efficiency in phytoremediation of the heavy metal. Groundwater samples were collected for analysis from rhizosphere of Jancus sp., Tamarix sp., and Suaeda sp. and compared with those of wetland regions without plants. Depletion and bio-concentration factors were calculated to evaluate the plants capability in removing metals from the wetland and determining the more suitable plant for phytoremediation. Results showed depletion of metals in the plant areas in compare with the bare land regions. Among the plants, the most depletion is for Jancus sp. followed by Tamarix sp. and Suaeda sp. The results also highlighted the potential of Jancus sp. for enhancing phytoremediation of heavy metal contaminated wetland, especially for Pb.

中文翻译：

---

调查伊朗法尔斯省Maharlu湖湿地地下水中某些本地植物物种对重金属的去除能力。

伊朗南部的盐碱Maharlu湖是设拉子-Sarvestan盆地的出口，Shiraz-Sarvestan盆地是一个内陆平坦的湖泊，周围环境表现为湿地环境。湿地地区的地下水被湖泊中的重金属污染，在该地区生长的湿地原生植物可能具有从其根际环境吸收重金属的趋势。该湖与湿地地下水处于水力连接状态，水力梯度反向会导致污染物进入含水层。本研究旨在实现湿地原生植物对重金属的植物修复作用。从Jancus sp。，Tamarix sp。和Suaeda sp。的根际收集地下水样品进行分析。并与没有植物的湿地地区进行了比较。计算了耗竭和生物富集因子，以评估植物从湿地中去除金属的能力，并确定更适合进行植物修复的植物。结果表明，与裸露土地相比，植物区域的金属耗竭。在植物中，消耗最大的是Jancus sp.。其次是Tamarix sp。和Suaeda sp。结果还突出了Jancus sp。的潜力。用于增强对重金属污染的湿地的植物修复，尤其是对铅的修复。结果还突出了Jancus sp。的潜力。用于增强对重金属污染的湿地的植物修复，尤其是对铅的修复。结果还突出了Jancus sp。的潜力。用于增强对重金属污染的湿地的植物修复，尤其是对铅的修复。