Exploring the benefits of growing bioenergy crops to activate lead-contaminated agricultural land: a case study on sweet potatoes.

摘要: Phytoremediation is the most environmentally friendly remediation technology for heavy metal contaminated soil. However, phytoremediation approach requires a long time to yield results, and plants used must be economically profitable maintain sustainability of process. Because high levels bioethanol can produced from sweet potatoes, an experiment was conducted by planting potatoes in lead-contaminated site observe their growth lead-uptake capacity, thereby enabling evaluation efficiency potatoes. The lead content soil approximately 6000 mg kg−1, phytoavailable Pb 1766 kg−1. Three starch-rich potato varieties, Tainung No. 10 (TNG-10), 31 (TNG-31), 57 (TNG-57), were experiment. results indicated that TNG-10, TNG-31, TNG-57 had fresh root tuber yields 94.5, 133.0, 47.5 ton ha−1 year−1, 9450, 13,297, 4748 L year−1 bioethanol, removed 2.68, 7.73, 3.22 kg lead, respectively. TNG-31 yielded highest production removal site. Therefore, implementing would decrease generate income, rendering sustainable applicable activation possible.