期刊
CHEMOSPHERE
卷 105, 期 -, 页码 53-61出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2013.11.064
关键词
Sewage sludge biochar; Polycyclic aromatic hydrocarbons; Potentially toxic elements; Cucumber; Accumulation
资金
- National High-Tech R&D Program of China (863 Program) [2012AA 06A 204]
- National Natural Science Foundation of China [41271324]
- CAS-TWAS Young International Scientist program
- CAS Young International Scientist program
The presence of contaminants such as polycyclic aromatic hydrocarbons (PAHs) and potentially toxic elements (PTEs), including As, Cd, Cu, Pb and Zn, restricts the application of sewage sludge (SS) to agricultural land. This research established that the conversion of SS to SS biochar (SSBC) significantly (p <= 0.01) decreased PAH and available PTE concentrations. Once added to soil both SS and SSBC significantly (p <= 0.05) decrease PAH availability. Bioaccumulation of PAHs into Cucumis sativa L. was reduced by both SSBC (44-57%) and (to a lesser extent 20-36%) by SS. Following addition to soil SSBC significantly (p <= 0.05) reduced available PTEs (except Cd), while SS significantly (p <= 0.05) increased PTE availability. As a consequence SSBC significantly (p <= 0.05) reduced PTE bioaccumulation (except Cd and Zn), while SS increased PTE bioaccumulation. These results suggest SSBC to be a candidate for soil amendment that offers advantages over SS in terms of PAH/PTE bioaccumulation mitigation. (C) 2013 Elsevier Ltd. All rights reserved.
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