期刊
出版社
MDPI
DOI: 10.3390/ijerph16081328
关键词
phytoextraction; thallium; lead; maize; DTPA; oxalic acid; leaching
资金
- National Natural Science Foundation of China [41372248, 41807463, 41807193, 41301348]
- Science Technology Project of Guangzhou [201607010286]
- NSFC-Guizhou Karst Sciences Research Center Project [U1612442]
- National College Students Innovation Training Project (CN) [201611078043]
Chelators including DTPA (diethylene triamine pentaacetic acid) and oxalic acid were selected for inducing phytoextraction of heavy metals (HMs) from Pb-, Tl-, and Pb-Tl- contaminated soil, in which heavy metals leakage was highly remarkable. Results showed that compared with the control group without chelating agent under planting conditions, the extraction efficiency (i.e., uptake coefficient) of Pb, Tl increased by 86%, 43% from Pb-Tl- contaminated soil in the presence of oxalic acid, and there was no significant change in heavy metal leakage under rainfall conditions. It was the best phytoremediation scheme in this work. Under rainfall conditions, the HMs concentration in the leachate showed a linear decreasing trend. Acid rain promoted the leakage of heavy metals, and the average leached amount of Tl increased by 1.47 times under acid rain conditions. However, for Pb, DTPA was the main influencing factor, followed by acid rain.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据