Novel Wollastonite-modified pervious concrete flooring system for nutrient removal from water runoff

农业活动，特别是与动物生产设施有关的活动，可能对水质产生不利影响。从这些设施流出的水的污染包括沉积物、病原体和营养物。地表沃茨中的这种营养物质可能对大多数水生生物有害，并对邻近社区造成严重的健康和水质问题。目前用于动物圈养设施的操作实践的一个问题是使用不渗透的地板表面，例如普通混凝土，这增加了来自这些设施的径流，导致周围环境中的更高污染物水平。据信，透水混凝土掺入硅灰石添加剂可以是一个最佳的地板系统，这样的动物生产设施。透水混凝土是一种高渗透性混凝土，水通过其主体的流速很高。另一方面，硅灰石是一种天然存在的针状矿物（偏硅酸钙），已知其作为去除营养物的有效介质。结合硅灰石和透水混凝土的这两个特点，可以产生一种新型的地板系统，在减少营养物浓缩和水径流方面具有高效率，从而在动物圈养设施中实现环境和废物管理实践的创新。

Agricultural activities, and in particular those associated with animal production facilities, can adversely affect water quality. Pollution in water runoff from these facilities includes sediments, pathogens, and nutrients. Such nutrients in surface waters can be detrimental to most forms of aquatic life, and cause serious health and water quality concerns for neighboring communities. One problem with current operational practices for animal confinement facilities is the use of impervious flooring surfaces such as normal concrete, which increase runoff from these facilities, leading to higher pollutant levels in the surrounding environment. It is believed that pervious concrete incorporating wollastonite additives can be an optimum flooring system for such animal production facilities. Pervious concrete is a highly permeable concrete with a high flow rate for water through its body. On the other hand, wollastonite is a naturally occurring acicular mineral (calcium meta-silicate) that is known to act as an effective medium for nutrients removal. Combining these two features of wollastonite and pervious concrete can lead to a novel flooring system with high efficiency in reducing nutrients concentrates and water runoff, leading to innovation in environmental and waste management practice in animal confinement facilities.