AI Article Synopsis
- The use of cadmium-containing fertilizers has led to heavy metal contamination in agricultural soils, making remediation crucial for health and food safety.
- Experimentation with illite/smectite clay and bone char in Beijing indicated that these combined amendments can effectively reduce cadmium levels in soil and in the crop Brassica chinensis.
- The best results were seen with a 5% amendment combining higher proportions of bone char, which did not negatively impact plant growth, showcasing their potential for soil remediation.
Article Abstract
The widespread use of cadmium (Cd)-containing organic fertilizers is a source of heavy metal inputs to agricultural soils in suburban areas. Therefore, the research and development of new materials and technologies for the remediation of Cd-contaminated soil is of great significance and has the potential to guarantee the safety of agricultural products and the protection of human health. We performed pot experiments to determine the potential of combined amendments of illite/smectite (I/S) clay with bone chars for the remediation of Cd-contaminated agricultural soils in a suburban area of Beijing, China. The results showed that both diethylene triamine pentaacetic acid (DTPA)-extractable Cd in soil and the Cd in Brassica chinensis were significantly decreased by the application of 1, 2, or 5% combined amendments with various I/S and bone char (BC) ratios. The higher proportions of BC used in the combined amendments resulted in a better immobilization of soil Cd. The application of the 5% amendment that combined I/S with either pig or cattle BC resulted in the best immobilization. All of the combined amendments, regardless of the composition and ratio of the components, had no negative effects on the growth of B. chinensis. Therefore, it was concluded that combined amendments of I/S and BC have a good potential for remediating Cd-contaminated soils.
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| http://dx.doi.org/10.1007/s11356-018-2227-4 | DOI Listing |
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