Phytoremediation is a cost-effective and relatively cleaner method for remediating contaminated areas using plants. Certain plants, including some sunflower species, have already been identified as potential phytoremediation candidates because of their ability to accumulate heavy metals. This study investigated the ability of Tithonia rotundifolia (red sunflower) to accumulate lead from lab-contaminated soils. T. rotundifolia was assessed as a candidate for phytoremediation of lead soils. The study also assessed whether the form (species) of lead as the source of contamination or whether arbuscular mycorrhizal fungi had effects on plant uptake of the metal. Results showed that T. rotundifolia was able to accumulate up to 33% of the lead from the contaminated soils making it a promising candidate for phytoremediation. The amount of lead taken up by the plant ranged from 0.1 to 1.2 mg/kg of plant biomass. The source of the contamination, either lead nitrate or lead carbonate, had a significant impact on the amount of lead that accumulated in the plant. The sunflowers grown in the lead nitrate treatment were able to accumulate significantly more lead than the sunflowers grown in the lead carbonate treatment.

中文翻译：

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轮叶二氧化硫对地下铅的动员和转运

植物修复是一种使用植物修复污染区域的经济有效且相对清洁的方法。某些植物，包括一些向日葵物种，由于其能够积累重金属而被确定为潜在的植物修复候选物。这项研究调查了红花木瓜（Ththonia rotundifolia）（红色向日葵）从实验室污染土壤中积累铅的能力。T. rotundifolia被评估为铅土壤植物修复的候选者。该研究还评估了铅的形式（种类）是否为污染源，或者丛枝菌根真菌是否对植物吸收金属有影响。结果表明圆叶杜鹃能够从被污染的土壤中积累多达33％的铅，这使其成为进行植物修复的有希望的候选者。植物吸收的铅量为0.1至1.2 mg / kg植物生物量。硝酸铅或碳酸铅等污染源对工厂中积累的铅量有重大影响。在硝酸铅处理中生长的向日葵比在碳酸铅处理中生长的向日葵能够积累更多的铅。