Assessment of heavy metal contamination of surface soils from typical paddy terrace wetlands on the Yunnan Plateau of China
Assessment of heavy metal contamination of surface soils from typical paddy terrace wetlands on the Yunnan Plateau of China
复制标题
云南高原典型水稻梯田湿地表土重金属污染评价
DOI：
10.1016/j.pce.2010.03.025
复制
发表时间：
2011-01-01
影响因子：
3.7
通讯作者：
Huang, Laibin
中科院分区：
文献类型：
--
作者：
Bai, Junhong;Xiao, Rong;Huang, Laibin
目前对生活污水灌溉条件下沿着不同海拔高度水稻土重金属污染状况的研究较少。2004年12月，对云南高原勐平梯田和全福掌梯田表层水稻土中As、Cr、Cd、Pb的含量进行了测定，以评价其污染状况。结果表明，两种梯田土壤中As和Cd的平均含量均显著高于参考值（p < 0.01），而Pb的平均含量均低于参考值（p < 0.01）。Cr在MP土中的平均浓度高于参考浓度，而在QFZ土中的平均浓度低于参考浓度。与MP土壤相比，QFZ土壤重金属含量较低。但只有Cd含量超过土壤质量指导值。污染因子（C（f）（i））值一般为中等的As和Cd，低铅在这两个网站。Cr在MP土中含量中等，在QFZ土中含量较低。污染度（C（d））值一般为中等，MP梯田随海拔高度的增加呈沿着降低的趋势，QFZ梯田则呈缓慢增加的趋势。(c)2010爱思唯尔有限公司版权所有。
Little research has been done to investigate heavy metal contamination in paddy soils along different altitudes under domestic sewage irrigation. Total concentrations of As, Cr, Cd and Pb were determined in surface paddy soils from Mengpin (MP) and Quanfuzhang (QFZ) paddy terraces on the Yunnan Plateau of China in December, 2004, in order to assess their contamination status. Results showed that the average concentrations of As and Cd in both terrace soils were significantly (p < 0.01) greater than the reference concentrations, while lower for Pb in both soils. However, as for Cr, the average concentrations are higher in MP soils while lower in QFZ soil than the reference concentration, while. Compared with MP soils, QFZ soils had lower heavy metal concentrations. However, only Cd greatly exceeded the guide value of soil quality. The contamination factor (C(f)(i)) values were generally moderate for As and Cd, and low for Pb in both sites. As for Cr, they were moderate in MP soils but low in QFZ soils. The contamination degree (C(d)) values were generally moderate, showing a decreasing tendency along the increasing altitudes in MP terrace, while slowly increasing tendency in QFZ terrace. (c) 2010 Elsevier Ltd. All rights reserved.