Retention of propiconazole and terbutryn on acid sandy-loam soils with different organic matter and Cu concentrations
Retention of propiconazole and terbutryn on acid sandy-loam soils with different organic matter and Cu concentrations
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DOI：
10.1016/j.jenvman.2019.109346
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发表时间：
2019-10-15
影响因子：
8.7
通讯作者：
Fernandez-Calvno, David
中科院分区：
文献类型：
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作者：
Conde-Cid, Manuel;Santas-Miguel, Vanesa;Fernandez-Calvno, David
采用批式吸附试验研究了丙环唑和特净净在10种不同有机质和铜浓度的酸性葡萄园土壤中的平衡吸附特性。平衡吸附实验的吸附数据一般很好地描述了线性和Freundlich模型。模型参数表明，土壤有机质对丙环唑的吸附过程起着关键作用，但土壤中无定形铁氧化物含量也起着关键作用。土壤有机质对特丁净吸附有积极影响，而交换性铜的增加降低了特丁净的吸附。脱附实验表明，丙环唑和特丁净在土壤中的吸附都是不可逆的，即吸附后的脱附量始终小于50%。
Equilibrium propiconazole and terbutryn adsorption characteristics were evaluated in ten acid vineyard soils with a wide range of organic matter and copper concentrations using batch experiments. Adsorption data from equilibrium adsorption experiments were generally well described by linear and Freundlich models. Parameters from these models showed that soil organic matter played a key role of propiconazole adsorption processes, but also the amorphous Fe oxides content in soils. Soil organic matter positively influenced terbutryn adsorption, whereas increases in exchangeable copper decreased terbutryn adsorption. Desorption experiments showed that both, propiconazole and terbutryn adsorption in soils was quite irreversible, i.e. the amount of pesticides desorbed after its adsorption was always less than 50%.