|
| Pb and Cd- polluted soil remediation effects by green waste compost |
| Received:August 04, 2021 |
| View Full Text View/Add Comment Download reader |
| KeyWord:green waste;compost;peat;Pb;Cd;soil remediation;enzyme activity;Brassica chinensis L. |
| Author Name | Affiliation | E-mail | | LIU Yuanxin | The College of Forestry, Beijing Forestry University, Beijing 100083, China | | | LI Weiting | Bureau of Water Resource of Linhe, Bayannur, Inner Mongolia, Bayannur 015000, China | | | SUN Xiangyang | The College of Forestry, Beijing Forestry University, Beijing 100083, China | sunxy@bjfu.edu.cn | | LI Suyan | The College of Forestry, Beijing Forestry University, Beijing 100083, China | | | ZHANG Runzhe | The College of Forestry, Beijing Forestry University, Beijing 100083, China | | | MA Jie | The College of Forestry, Beijing Forestry University, Beijing 100083, China | |
|
| Hits: 914 |
| Download times: 837 |
| Abstract: |
| A pot experiment was conducted to clarify the remediation effects of green waste compost（GWC）on soil contaminated with lead （Pb）and cadmium（Cd）. Treatment of 0（control, CK）, 1%, 3%, and 5% application rates of single and mixed GWC and peat were applied to study the effects of Pb and Cd contamination on the activity of soil dehydrogenase, urease, catalase, and phosphatase; Pb and Cd concentration in the soil pore water, as well as the accumulation and translocation of Pb and Cd in shoots and roots of Brassica chinensis L. was also investigated. At application rates of 3% and 5% the soil enzyme activity was significantly increased; 5% peat demonstrated the most significant increase in dehydrogenase and catalase activity, while 5% GWC significantly increased the activity of urease and phosphatase. Pb concentration in the soil pore water decreased over 7 days, following the increase in the application rate of the different treatments; On Day 1, the Pb concentration of the 5% GWC and mixed treatment soils decreased by 78% and 56%, respectively, as compared to CK. On Day 1, the Cd concentration in the soil pore water for the different treatments was higher than that of CK; 5% GWC increased by 70%, as compared to CK. The Cd concentration in the peat treatment initially increased, after which it decreased. Under the treatments of 3% and 5%, acid-soluble Pb, Cd in the soil was significantly reduced, while its residual form significantly increased. The Cd content in the plant′ s shoots and roots significantly reduced, and the bioconcentration factor and translocation factor also reduced correspondingly; 5% mixed treatment application had a significantly better effect. Overall, both single and mixed applications of GWC and peat are capable of remediating Pb-Cd polluted soil, but the effect of peat in declining accumulation is better than that of GWC. |
|
|
|
