Irrigation with surface water carrying plant pathogens poses a risk for agriculture. Managed aquifer recharge enhances fresh water availability while simultaneously it may reduce the risk of plant diseases by removal of pathogens during aquifer passage. We compared the transport of three plant pathogenic bacteria with Escherichia coli WR1 as reference strain in saturated laboratory column experiments filled with quartz sand, or sandy aquifer sediments. E. coli showed the highest removal, followed by Pectobacterium carotovorum, Dickeya solani and Ralstonia solanacearum. Bacterial and non-reactive tracer breakthrough curves were fitted with Hydrus-1D and compared with colloid filtration theory (CFT). Bacterial attachment to fine and medium aquifer sand under anoxic conditions was highest with attachment rates of max. k_att1 = 765 day^-1 and 355 day^-1, respectively. Attachment was the least to quartz sand under oxic conditions (k_att1 = 61 day^-1). In CFT, sticking efficiencies were higher in aquifer than in quartz sand but there was no differentiation between fine and medium aquifer sand. Overall removal ranged between < 6.8 log₁₀ m⁻¹ in quartz and up to 40 log₁₀ m⁻¹ in fine aquifer sand. Oxygenation of the anoxic aquifer sediments for two weeks with oxic influent water decreased the removal. The results highlight the potential of natural sand filtration to sufficiently remove plant pathogenic bacteria during aquifer storage.

用带有植物病原体的地表水灌溉会给农业带来风险。管理的含水层补给提高了淡水的可用性，同时它可以通过在含水层通过过程中去除病原体来降低植物病害的风险。我们在充满石英砂或沙质含水层沉积物的饱和实验室柱实验中比较了三种植物病原菌与大肠杆菌WR1 作为参考菌株的运输。E. coli的去除率最高，其次是Pectobacterium carotovorum、Dickeya solani和Ralstonia solanacearum。用 Hydrus-1D 拟合细菌和非反应性示踪剂穿透曲线，并与胶体过滤理论 (CFT) 进行比较。细菌在缺氧条件下对细水和中等含水层沙子的附着率最高，附着率最高。k _att1  = 765 day ^-1和 355 day ^-1，分别。在有氧条件下（ k _att1 = 61 day ^-1），对石英砂的附着最少。在 CFT 中，含水层的粘附效率高于石英砂，但细含水层和中等含水层砂之间没有区别。整体去除范围在 < 6.8 log ₁₀ m ^-1 in 石英和高达 40 log ₁₀ m 之间^-1在细含水层沙中。用含氧流入水对缺氧含水层沉积物进行两周的氧化会降低去除率。结果突出了天然砂滤在含水层储存期间充分去除植物病原菌的潜力。