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首页> 外文期刊>Environmental Pollution >Arsenic Stability And Mobilization In Soil At An Amenity Grassland Overlying Chemical Waste (st. Helens, Uk)
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Arsenic Stability And Mobilization In Soil At An Amenity Grassland Overlying Chemical Waste (st. Helens, Uk)

机译：覆盖化学废物的便利草原上土壤的砷稳定性和动员作用（英国圣海伦斯）

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A 6.6 ha grassland, established on a former chemical waste site adjacent to a residential area, contains arsenic (As) in surface soil at concentrations 200 times higher than UK Soil Guideline Values. The site is not recognized as statutory contaminated land, partly on the assumption that mobility of the metalloid presents a negligible threat to human health, groundwater and ecological receptors. Evidence for this is evaluated, based on studies of the effect of organic (green waste compost) and inorganic (iron oxides, lime and phosphate) amendments on As fractionation, mobility, plant uptake and earthworm communities. Arsenic mobility in soil was low but significantly related to dissolved organic matter and phosphate, with immobilization associated with iron oxides. Plant uptake was low and there was little apparent impact on earthworms. The existing vegetation cover reduces re-entrainment of dust-blown particulates and pathways of As exposure via this route. Minimizing risks to receptors requires avoidance of soil exposure, and no compost or phosphate application.
机译：一块6.6公顷的草地建在一个与居民区相邻的旧化学废物场上，其表层土壤中的砷含量比英国《土壤指南》值高200倍。该地点未被认为是法定污染土地，部分原因是假定准金属的流动性对人类健康，地下水和生态受体的威胁微不足道。基于对有机（绿色废料堆肥）和无机（氧化铁，石灰和磷酸盐）改性剂对砷分馏，迁移率，植物吸收和communities群落的影响的研究，评估了其证据。土壤中的砷迁移率很低，但与溶解的有机物和磷酸盐显着相关，而固定化与氧化铁有关。植物吸收低，对and几乎没有明显的影响。现有的植被覆盖减少了通过该途径重新夹带尘土飞扬的颗粒和砷暴露的途径。为了最大程度地减少对受体的危害，需要避免土壤暴露，并且不使用堆肥或磷酸盐。

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