Typical Azole Biocides in Biosolid-Amended Soils and Plants Following Biosolid Applications
Typical Azole Biocides in Biosolid-Amended Soils and Plants Following Biosolid Applications
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DOI：
10.1021/jf4013949
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发表时间：
2013-07-03
影响因子：
6.1
通讯作者：
Pan, Chang-Gui
中科院分区：
文献类型：
--
作者：
Chen, Zhi-Feng;Ying, Guang-Guo;Pan, Chang-Gui
在农业用地上施用生物固体可能会使土壤受到各种家用化学品和个人护理产品的污染。本研究探讨了典型的唑类杀菌剂氯咪巴唑，克霉唑，咪康唑在生物固体改良土壤中的发生和消散，以及植物对这些杀菌剂的吸收。田间试验包括两个处理组：5年内每年以5、10、20和40 t/ha的速率施用生物固体的老组，和仅施用一种生物固体的新组。结果表明，氯咪巴唑、克霉唑和咪康唑在生物固体改良土壤中检出，而在对照土壤中未检出。这些杀生物剂在从试验地块收集的作物植物中没有发现。在田间条件下，氯咪巴唑、克霉唑和咪康唑的消散半衰期分别为175-179、244和130-248天。高生物固体施用率和重复生物固体施用可导致杀生物剂在农业土壤中的更高持久性。暴露模型可以有效地预测不同生物固体施用量的老处理土壤中氯咪巴唑和咪康唑的残留浓度。因此，田间试验证明了这三种杀生物剂在土壤环境中的高持久性。
Biosolid application on agricultural land may contaminate soils with various household chemicals and personal care products. This study investigated the occurrence and dissipation of typical azole biocides climbazole, clotrimazole, and miconazole in biosolid-amended soils as well as the uptake of these biocides by plants. The field trial includes two treatment groups: old groups with biosolid application at rates of 5, 10, 20, and 40 t/ha every year within 5 years, and new groups with only one biosolid application. The results showed that climbazole, clotrimazole, and miconazole were detected in biosolid-amended soils, but not detected in control soils. These biocides were not found in the crop plants collected from the trial plots. The dissipation half-lives for climbazole, clotrimazole, and miconazole under the field conditions were 175-179, 244, and 130-248 days, respectively. High biosolid application rates and repeated biosolid applications could lead to higher persistence of the biocides in the agricultural soils. An exposure model could effectively predict the residual concentrations of climbazole and miconazole in the biosolid-amended soils of the old treatments with different biosolid application rates. Thus, the field trial demonstrated high persistence of these three biocides in the soil environments.