In Situ Understanding of the Effect of Manure on the Availability of Sulfonamide Antibiotics in Soils Using DGT
In Situ Understanding of the Effect of Manure on the Availability of Sulfonamide Antibiotics in Soils Using DGT
复制标题
DOI：
10.1007/s00128-023-03831-4
复制
发表时间：
2023-12
影响因子：
2.7
通讯作者：
Yilin Yuan;Sisi Liu;Yuerui Huang;Jin-Xin Zi;Chang-Er Chen
中科院分区：
文献类型：
--
作者：
Yilin Yuan;Sisi Liu;Yuerui Huang;Jin-Xin Zi;Chang-Er Chen
采用薄膜扩散梯度法（DGT）原位研究了有机肥对土壤中磺胺类抗生素有效性的影响。选择磺胺嘧啶（SDZ）、磺胺甲恶唑（SMX）、磺胺二甲嘧啶（SMZ）、磺胺氯哒嗪（SCP）和磺胺二甲氧嘧啶（SDM）等5种抗生素作为目标化合物。结果表明，施用有机肥会降低土壤中抗生素的DGT有效性。DGT测定值（CDGT）与土壤溶液浓度（Cd）具有良好的相关性。有机肥的施用可以抑制水杨酸从土壤到土壤溶液的通量。利用DGT-induced soil/sediment flux model（DIFS），计算了土壤中SA的不稳定库容量（Kdl）、吸附和解吸速率常数（k1，k-1）和响应时间（Tc）。有机肥的添加增加了可提取组分、不稳定池大小（Kdl）和k1，但降低了k-1。结合DGT通量与扩散层厚度（Δg）的倒数之间的非线性关系，这些结果表明，土壤颗粒向土壤溶液中的SA释放受到动力学和动力学的限制，施用有机肥可以增强这种限制。这项研究提供了深入了解抗生素的可用性在土壤中所造成的粪肥的应用。
In this study, the effects of manure on the availability of sulfonamide antibiotics (SAs) in soils were explored in situ by the Diffusive gradients in thin films (DGT) technique. Five antibiotics, including sulfadiazine (SDZ), sulfamethoxazole (SMX), sulfamethazine (SMZ), sulfachloropyridazine (SCP), and sulfadimethoxine (SDM), were selected as target compounds. Results showed that the manure application to soil could reduce the antibiotic availability indicated by DGT. DGT measurement (CDGT) showed good correlations with the soil solution concentrations (Cd). Manure application can suppress the fluxes of SAs from the soil to the soil solution. Using the DGT-induced soil/sediment flux model (DIFS), the labile pool size (Kdl), the rate constants (k1,k-1) of adsorption and desorption and response time (Tc) of SAs in soils were obtained. The addition of manure increased extractable fraction, labile pool size (Kdl) andk1but decreasedk-1. Together with the nonlinear relationship between DGT fluxes and the reciprocal of diffusive layer thickness (Δg), these findings suggested that the release of SAs from soil particles into the soil solution is thermodynamically and kinetically limited, and the manure application could enhance this limitation. This study offers insight into antibiotic availability in soils caused by manure application.