Potential of Hemidesmus indicus for phytoextraction of lead from industrially contaminated soils.
Potential of Hemidesmus indicus for phytoextraction of lead from industrially contaminated soils.
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Hemidesmus indicus 从工业污染土壤中植物提取铅的潜力。
DOI：
10.1016/j.chemosphere.2004.09.022
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发表时间：
2005
期刊：
影响因子：
8.8
通讯作者：
G. García
中科院分区：
文献类型：
--
作者：
K. C. Sekhar;C. Kamala;N. Chary;Vysetti Balaram;G. García
印度安得拉邦（美联社）海得拉巴附近的卡特丹工业区的许多场所都受到高浓度铅污染。利用植物去除土壤中的有毒金属（植物修复）正在成为对受污染土壤进行经济高效且无害环境修复的潜在策略。我们研究了使用铅超富集植物 Hemidesmus indicus 对受铅污染的土壤进行修复。通过盆栽实验研究了这种植物在芽和根中积累铅的能力。结果表明，前1-3周根部积累量最大，之后3个月的接触期，地上部积累率最大。此外，我们还使用了各种螯合剂，例如 EDTA、HEDTA、DTPA 和 CDTA，以确定有效去除污染土壤中铅的最佳化学改性剂。还研究了各种金属共离子存在下对植物铅积累的影响。尝试使用 H. indicus 对 Kattedan 的五种不同“现实”土壤中的铅进行净化。
Many sites in the industrial region of Kattedan near Hyderabad, Andhra Pradesh (AP), India are contaminated with high concentrations of lead. The use of plants to remove toxic metals from soils (phytoremediation) is emerging as a potential strategy for cost-effective and environmentally sound remediation of contaminated soils. We studied remediation of soils contaminated with lead using a lead hyperaccumulating plant, Hemidesmus indicus. The ability of this plant to accumulate lead in shoots and roots was studied with pot experiments. The results showed that accumulation was maximum in roots for the first 1–3 weeks and later for a contact period of three months, the accumulation rate was maximum in shoots. In addition we used various chelating agents such as EDTA, HEDTA, DTPA and CDTA to determine the best chemical modifier for efficient lead removal from contaminated soils. The effect on lead accumulation of plant in the presence of various metal co-ions was also studied. An attempt was made for the decontamination of lead from five different “Real-life” soils of Kattedan using H. indicus.