Short-term extractability of sulfadiazine after application to soils.

Short-term extractability of sulfadiazine after application to soils.
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磺胺嘧啶施用于土壤后的短期可萃取性

DOI:
10.1016/j.envpol.2012.09.010
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发表时间:
2013
影响因子:
8.9
通讯作者:
Matthies M
Matthies M
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Müller T;Rosendahl I;Focks A;Siemens J;Klasmeier J;Matthies M

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兽医抗生素磺胺嘧啶(SDZ)在土壤中的长期环境命运是由可逆的固存成残留组分和不可逆的不可提取残留物(NER)的形成决定的,这可以被描述为一级速率过程。然而,土壤中SDZ的浓度动态表明,在最初的24小时内,SDZ的可提取性会迅速降低,原因不明。因此,我们研究了在不同的SDZ应用程序下,在24小时内,两种不同土壤中SDZ的短期可提取性:有和没有肥料,风干和潮湿土壤。在所有批次中,我们观察到可提取性在几分钟的时间尺度上瞬间丧失,以及24小时内动力学决定的固排和NER形成。用简单的动力学模型进行数据评估得出结论,施用有机肥加速了NER的短期形成,而固排在所有批次中都非常相似。
The long-term environmental fate of the veterinary antibiotic sulfadiazine (SDZ) in soils is determined by a reversible sequestration into a residual fraction and an irreversible formation of non-extractable residues (NER), which can be described as first-order rate processes. However, the concentration dynamics of the resulting fractions of SDZ in soil show an unexplained rapid reduction of extractability during the first 24 h. We therefore investigated the short-term extractability of SDZ in two different soils under different SDZ application procedures over 24 h: with and without manure, for air-dried and for moist soils. In all batches, we observed an instantaneous loss of extractability on a time scale of minutes as well as kinetically determined sequestration and NER formation over 24 h. Data evaluation with a simple kinetic model led to the conclusion that application with manure accelerated the short-term formation of NER, whereas sequestration was very similar for all batches.
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