DA-6 and GLDA Enhanced Pancium virgatum L. to Phytoextract Cd from Contaminated Soils

被引：2
|
作者：
Wang Z. [1 ,2 ]
Sun Z.-J. [1 ,3 ]
Mohamed S. [4 ]
Wang Z. [1 ,2 ]
He J. [3 ]
Han L. [3 ]
机构：
[1] School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan
[2] Xinhua College, Ningxia University, Yinchuan
[3] Institute of Environmental Engineering, Ningxia University, Yinchuan
[4] National Research Centre of Egypt, Cairo
来源：
Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 12期
关键词：
Accumulation; Biodegradable chelate GLDA; Diethyl aminoethyl hexanoate (DA-6); Heavy metals; Panicum virgatum L; Phytoremediation;
D O I：
10.13227/j.hjkx.202004071
中图分类号：
学科分类号：
摘要：
To reveal the effects of diethyl aminoethyl hexanoate (DA-6) combined with L-Glutamic acid, N,N-diacetic acid (GLDA) on the remediation of Cd contaminated soils by Panicum virgatum L., different GLDA application methods with total application doses of 600, 1 200, and 2 400 kg•hm-2equally divided 1, 2, and 4 times, respectively, were studied on the basis of DA-6 concentrations of 0 and 10 μmol•L-1, and application intervals (2 and 4 times) were 30 and 15 days, respectively, over 60 days. Soil pH, dissolved organic carbon (DOC), biomass and Cd contents, Cd extraction, total Cd, and available Cd (DTPA-Cd) were analyzed. The results showed that first, the combination of DA-6 and GLDA could improve soil pH and DOC, and the pH and DOC increased significantly with increased GLDA application. Secondly, the combination of DA-6 and GLDA could significantly improve the biomass and Cd contents of Panicum virgatum L., and for DA-6, the amounts and times of GLDA application were the most important factors affecting the biomass and Cd contents. Third, the highest amount of Cd extracted was 22.18g•hm-2 at 1 200 kg•hm-2 GLDA applied 4 times and 10μmol•L-1 DA-6, which was 1.93 times higher than CK (wherein no DA-6 and GLDA were applied) and 1.23 times higher than 10D0 (in which only DA-6 was applied). Finally, the lowest soil total Cd was 0.529mg•kg-1 at 2 400 kg•hm-2 GLDA applied 2 times and 10 μmol•L-1 DA-6, which was 21.04% lower than CK and 18.23% lower than 10D0. Therefore, the combination of DA-6 and GLDA can further strengthen the recovery of Cd contaminated farmlands via Panicum virgatum L.. © 2020, Science Press. All right reserved.
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页码：5589 / 5599
页数：10
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