|
| Effect of a sodium tripolyphosphate and citric acid composite on arsenic bioaccumulation caused by arseniccontaminated soil in Pteris vittata L. |
| Received:May 30, 2019 |
| View Full Text View/Add Comment Download reader |
| KeyWord:soil;arsenic;phytoremediation;sodium tripolyphosphate;citric acid;Pteris vittata L. |
| Author Name | Affiliation | E-mail | | XIANG Dong-fang | College of Basic Sciences, Huazhong Agricultural University, Wuhan 430070, China | | | LIAO Shui-jiao | College of Basic Sciences, Huazhong Agricultural University, Wuhan 430070, China | liaosj@mail.hzau.edu.cn | | TU Shu-xin | College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | ZHANG Li-mei | College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | XIE Tian | College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | |
|
| Hits: 2423 |
| Download times: 2761 |
| Abstract: |
| To study the effect of a sodium tripolyphosphate and citric acid composite on arsenic bioaccumulation caused by As-contaminated soil in Pteris vittata L., the effect of sodium tripolyphosphate (0.75 g·kg-1 soil), citric acid (0.75 g·kg-1 soil), and the sodium tripolyphosphate and citric acid composite (0.375 g·kg-1 soil sodium tripolyphosphate and 0.375 g·kg-1 soil citric acid) on the content of available As was studied using a soil screening experiment in paddy soil containing 57.7 mg·kg-1 As. The effect of the composite (0.187 5 g·kg-1 soil sodium tripolyphosphate and 0.187 5 g·kg-1 soil citric acid) on As bioaccumulation in Pteris vittata L. was studied using a pot experiment in paddy soil. The results showed that the activation effect of the composite on soil As was more significant than that of a single chemical activator. Furthermore, compared with the control, the dry weight of pinnae and the total amount of As extraction increased by more than 21.8% and 40.4%, respectively, by the application of the composite. Additionally, in the rhizosphere soil of the pot experiment, the total As content decreased and the activities of urease and dehydrogenase increased significantly compared with those for the control. These results suggest that the effect of As bioaccumulation caused by As-contaminated soil on Pteris vittata L. increases significantly by the application of the composite. The increase was mainly caused by the increase in plant dry weight and the As content available in the soil. |
|
|
|
