Abstract
Soil washing is an effective technology for the remediation of soils contaminated with various metals. However, the bioavailability of residual metals in soils and soil properties can be changed during the washing processes. In this study, we used four amendments to revitalize mixed chelator (MC)–washed soils (WS). These amendments included zeolite, CaCO3, biochar, and chicken manure. Results showed that inorganic amendments reduced the available Cd and Zn concentrations, while organic amendments, particularly chicken manure, reduced the Pb bioavailability in WS. The combination of 0.2% CaCO3 and 2% chicken manure amendments reduced the Cd, Pb, and Zn bioavailability by 45.8%, 77.8%, and 15.0% compared with the control treatment, respectively. The inorganic amendments should increase the seed germination rate of Chinese cabbage (Brassica rapa L.). However, the shoot growth decreased significantly. The combination of amendments cannot increase the seed germination but can significantly increase the shoot growth of Chinese cabbage compared with the control. The combination of amendments enhanced the fertility of WS, particularly available P and exchangeable K, which may improve plant growth. These results suggested that the combination of amendments, especially CaCO3 (0.2%) and chicken manure (2%), can be used to revitalize MC-WS.
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Funding
This study was supported by the funding of the National Natural Science Foundation of China (Nos. 41401584, 41402305, 41541012). Fund Program for the Scientific Activities of Selected Returned Overseas Professionals in Shanxi Province (to Li Ji).
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Guo, X., Yang, Y., Ji, L. et al. Revitalization of Mixed Chelator–Washed Soil by Adding of Inorganic and Organic Amendments. Water Air Soil Pollut 230, 112 (2019). https://doi.org/10.1007/s11270-019-4169-y
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DOI: https://doi.org/10.1007/s11270-019-4169-y