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首页> 外文期刊>The Science of the Total Environment >Nutrient, metal and microbial loss in surface runoff following treated sludge and dairy cattle slurry application to an Irish grassland soil
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Nutrient, metal and microbial loss in surface runoff following treated sludge and dairy cattle slurry application to an Irish grassland soil

机译：将处理过的污泥和奶牛粪浆施用到爱尔兰草原土壤后，地表径流中的营养，金属和微生物损失

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Treated municipal sewage sludge ("biosolids") and dairy cattle slurry (DCS) may be applied to agricultural land as an organic fertiliser. This study investigates losses of nutrients in runoff water (nitrogen (N) and phosphorus (P)), metals (copper (Cu), nickel (Ni), lead (Pb), zinc (Zn), cadmium (Cd), chromium (Q)), and microbial indicators of pollution (total and faecal coliforms) arising from the land application of four types of treated biosolids and DCS to field micro-plots at three time intervals (24,48,360 h) after application. Losses from biosolids-amended plots or DCS-amended plots followed a general trend of highest losses occurring during the first rainfall event and reduced losses in the subsequent events. However, with the exception of total and faecal coliforms and some metals (Ni, Cu), the greatest losses were from the DCS-amended plots. For example, average losses over the three rainfall events for dissolved reactive phosphorus and ammonium-nitrogen from DCS-amended plots were 5 and 11.2 mg L~(-1), respectively, which were in excess of the losses from the biosolids plots. When compared with slurry treatments, for the parameters monitored biosolids generally do not pose a greater risk in terms of losses along the runoff pathway. This finding has important policy implications, as it shows that concern related to the reuse of biosolids as a soil fertiliser, mainly related to contaminant losses upon land application, may be unfounded.
机译：经过处理的市政污水污泥（“生物固体”）和奶牛粪便（DCS）可以作为有机肥料应用于农田。这项研究调查了径流水（氮（N）和磷（P）），金属（铜（Cu），镍（Ni），铅（Pb），锌（Zn），镉（Cd），铬（ Q）），以及在施用后三个时间间隔（24、48、360小时）将四种类型的处理过的生物固体和DCS土地施用到田间微孔道上而造成的污染（总和粪便大肠菌群）的微生物指标。生物固体修正地块或DCS修正地块的损失遵循总体趋势，即在第一次降雨事件中发生最高损失，随后的事件中损失减少。但是，除了总的和粪便的大肠菌群以及某些金属（Ni，Cu）外，损失最大的是DCS修正图。例如，在三个降雨事件中，DCS修正区的溶解性活性磷和铵态氮的平均损失分别为5和11.2 mg L〜（-1），超过了生物固体区的损失。与泥浆处理相比，对于监测参数而言，生物固体在径流径流损失方面通常不会带来更大的风险。这一发现具有重要的政策意义，因为它表明，与将生物固体再用作土壤肥料有关的担忧（主要与土地施用时的污染物损失有关）可能是没有根据的。

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