期刊
ENVIRONMENTAL POLLUTION
卷 242, 期 -, 页码 1880-1886出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2018.07.078
关键词
Biochar; Soil; Aging; Sorption; Atrazine; Phenanthrene
资金
- Ministry of Science and Technology of China (973 program) [2014CB441104]
- Natural Science Foundation of China [41703106]
- 111 Program, Ministry of Education, China [T2017002]
Due to its high sorption capacity for different kinds of contaminants, biochar is advocated as a novel remediation strategy for contaminated soils. However, it is not clear how long this extraordinary sorption capacity will be maintained after the biochar is applied to the soil. In this study, a commercial biochar was applied to an agricultural soil, and the sorption of atrazine and phenanthrene on biochar amended soils with different aging periods ranging from 0 to 2 y was investigated. The application of fresh biochar in soil led to an obvious enhancement of the sorption coefficients (K-d) of atrazine and phenanthrene (by 3.13 and 2.93 times at C-e = 0.01 S-w. respectively) compared with the untreated soil. The surface area of biochar first increased and then decreased with aging time. Correspondingly, the sorption of atrazine and phenanthrene on the biochar amended soils first increased and then decreased markedly. Based on the changing trend of the K-d values with aging time, it could be predicted that the sorption capacity of biochar amended soils will decrease to the level of the untreated soil after 2.5 y. (C) 2018 Elsevier Ltd. All rights reserved.
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