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，可能会对水质产生不利影响。这些设施产生的径流污染包括沉积物、病原体和营养物质。地表水中的这种营养物质可能对大多数形式的水生生物有害，并对邻近社区的健康和水质造成严重担忧。目前动物隔离设施的操作实践存在一个问题，即使用普通混凝土等不透水的地板表面，这会增加这些设施的径流，导致周围环境中的污染物水平更高。人们认为，掺有硅灰石添加剂的透水混凝土可以成为此类畜牧业生产设施的最佳地板体系。透水混凝土是一种高渗透性混凝土，水在其体内的流动速度很高。另一方面，硅灰石是一种天然的针状矿物(偏硅酸钙)，被认为是去除营养物质的有效介质。结合硅灰石和透水混凝土的这两个特点，可以产生一种高效的新型地板系统，减少营养物质浓缩物和水的径流，从而创新动物圈养设施的环境和废物管理实践。

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.