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| Phytoremediation efficiency of Pennisetum hydridum for acid-and cadmium-polluted soil and its safe utilization |
| Received:October 29, 2015 |
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| KeyWord:polluted soil;cadmium;Pennisetum hydridum;phytoremediation;safe application |
| Author Name | Affiliation | | XIE Hua | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China
The Collaborative Innovation Canter of the Ecological Environment & Integration Development in the Xijiang River Basin, Nanning 530001, China | | ZHAO Xue-mei | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China
Guangxi Soil Fertilizer Workstation, Nanning 530007, China | | XIE Zhou | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China | | WU Kai-qing | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China | | LI Xiang-lin | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China
The Collaborative Innovation Canter of the Ecological Environment & Integration Development in the Xijiang River Basin, Nanning 530001, China | | YANG Rui-gang | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China
The Collaborative Innovation Canter of the Ecological Environment & Integration Development in the Xijiang River Basin, Nanning 530001, China | | PENG Bo | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China | | YU Meng-hao | Scientific Research Acdemy of Guangxi Environmental Protection, Nanning 530022, China | | HE Jin-hua | Guangxi Soil Fertilizer Workstation, Nanning 530007, China |
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| Abstract: |
| Under field conditions, phytoremediation of acid-and cadmium-polluted soil by and its application safety were studied. Pennisetum hydridum exhibited Cd-enrichment capacity, as indicated by its enrichment coefficient of greater than 1. Under different soil treatments, Cd content, extraction quantity and efficiency of P.hydridum were the highest in the control, which was up to 1.69 mg·kg-1(dry weigh), 119.91 g·hm-2 and 6.98%, respectively. This indicated that phytoremediation efficiency of P. hydridum was better than that of Solanumnigrum, a known Cd hyperaccumulator. Calculation showed that it would take only 9 years for P. hydridum to remedy Cd polluted soil in the experimental area by reducing soil Cd below the limit of the grade Ⅱ of "Environmental Quality Standards for Soils"(GB 15618-1995). In addition to soil remediation, P. hydridum also has wide scope of applications, such as forage grass, organic fertilizer, paper-making material, energy plant, etc. Pennisetum hydridum would therefore be a feasible plant for phytoremediation of acid-and Cd-polluted farmland and safe utilization. |
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