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| Effect of organic materials on phytoremediation efficiency of Cd-contaminated acid soil by Sedum plumbizincicola |
| Received:May 29, 2020 |
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| KeyWord:organic material;Sedum plumbizincicola;phytoremediation;Cd-contaminated soil;Cd availability |
| Author Name | Affiliation | E-mail | | DENG Yue-qiang | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | | | CAO Xue-ying | Rural Vitalization Research Institute, Changsha University, Changsha 410022, China | | | TAN Chang-yin | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | chytan@hunnu.edu.cn | | SUN Li-juan | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | | | CAI Run-zhong | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | | | PENG Xi | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | | | BAI Jia | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | | | HUANG Shuo-pei | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | | | ZHOU Qing | Key Laboratory of Environmental Heavy Metal Pollution Mechanism and Ecology Remediation, College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China | |
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| Abstract: |
| Sedum plumbizincicola is a native cadmium/zinc(Cd/Zn)hyperaccumulator, and it is an effective plant for the phytoextraction of Cd-contaminated soil. To improve phytoremediation of Cd-contaminated acid soil by S. plumbizincicola, a pot experiment was conducted to investigate the effects of four organic materials[rice straw(RS), soybean straw(SS), pig manure(PM), and dissolved organic fertilizer (OF), and their application of 1% and 3% of soil] on the phytoremediation efficiency of S. plumbizincicola. The results showed that the application of organic materials could improve the physicochemical properties of tested soil. Soil pH, organic matter, as well as available N, P, and K content, under the organic materials application treatment were higher than those of the control(CK). The effect of organic materials on soil available Cd was different due to the different kinds of organic materials and application rates, and 3% OF treatment increased the soil available Cd by 50.0% compared with the CK. The application of organic materials promoted the growth of S. plumbizincicola:shoot and root biomass, increased by 1.08%~40.69% and 4.17%~54.17%, respectively, compared with the CK. The treatments of adding RS, SS, and OF improved Cd concentration in S. plumbizincicola shoots and roots by 10.02%~64.91% and 10.95%~45.78%, respectively. Under the planting conditions of S. plumbizincicola, the soil Cd removal rate reached by CK was 27.6%, while that reached by organic material treatments was 29.8%~50.7%. Results of the present study imply that the rice straw returning and application of dissolved OF could be used as an auxiliary strengthening measure in the phytoextraction of Cd-contaminated acid soil by S. plumbizincicola. |
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