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	Arsenic stabilization by zero-valent iron, bauxite residue, and zeolite at a contaminated site planting Panax notoginseng
	Yan X. L. ; Lin L. Y. ; Liao X. Y. ; Zhang W. B. ; Wen Y.
	2013
关键词	Panax notoginseng Arsenic Stabilization Zero-valent iron Bauxite residue Zeolite sequential extraction procedure red mud zerovalent iron bayer process soils remediation speciation hyperaccumulation accumulation spectroscopy
英文摘要	Panax notoginseng (Burk.) F.H. Chen, a rare traditional Chinese medicinal herb, is a widely used phytomedicine used all over the world. In recent years, the arsenic contamination of the herb and its relative products becomes a serious problem due to elevated soil As concentration. This study aimed to evaluate the effects of different types and dosages of amendments on As stabilization in soil and its uptake by P. notoginseng. Results showed that comparing to control treatment, the As concentrations of P. notoginseng declined by 49-63%, 43-61% and 52-66% in 0.25% zero-valent iron (Fe(0)), 0.5% bauxite residue, and 1% zeolite treatment, respectively; whereas the biomasses were elevated by 62-116%, 45-152% and 114-265%, respectively. The As(III) proportions of P. notoginseng increased by 8%, 9%, and 8%, and the transfer factors of As from root to shoot increased by 37%, 42% and 84% in the optimal treatments of Fe(0), bauxite residue, and zeolite. For soil As, all the three amendments could transform the non-specifically adsorbed As fraction to hydrous oxides Fe/AI fractions (by Fe(0) and red mud) or specifically adsorbed As fraction (by zeolite), therefore reduced the bioavailability of soil As. With a comprehensive consideration of stabilization efficiency, plant growth, environmental influence, and cost, Fe(0) appeared to be the best amendment, and zeolite could also be a good choice. In conclusion, this study was of significance in developing As contamination control in P. notoginseng planting areas, and even other areas for medicinal herb growing. (C) 2013 Elsevier Ltd. All rights reserved.
出处	Chemosphere
卷	93
期	4
页	661-667
收录类别	SCI
语种	英语
ISSN号	0045-6535
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30118]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yan X. L.,Lin L. Y.,Liao X. Y.,et al. Arsenic stabilization by zero-valent iron, bauxite residue, and zeolite at a contaminated site planting Panax notoginseng. 2013.

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