| Autor: |
Wang Z; School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China.; Xinhua College, Ningxia University, Yinchuan 750021, China., Sun ZJ; School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China.; Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China., Sameh M; National Research Centre of Egypt, Cairo 11435, Egypt., Wang Z; Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China., He J; Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China., Han L; Institute of Environmental Engineering, Ningxia University, Yinchuan 750021, China. |
| Jazyk: |
čínština |
| Zdroj: |
Huan jing ke xue= Huanjing kexue [Huan Jing Ke Xue] 2020 Dec 08; Vol. 41 (12), pp. 5589-5599. |
| DOI: |
10.13227/j.hjkx.202004071 |
| Abstrakt: |
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, 1200, and 2400 kg·hm -2 equally 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 1200 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 2400 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.. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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