Size bins for aggregates exposed to varying concentrations of microfibres

Microfibre abundance in aggregates were defined by counting microfibres observed in images of aggregates and then extrapolated per mm of the aggregate imaged. Microfiber abundance is measured per mm of aggregate size. Size bins of aggregates were calculated by first defining several size bins of aggregates from the range of aggregate size data measured during this study and then summing the abundance of aggregates which fell in to defined size classes.聚集体（aggregates）内微纤维（microfibre）的丰度，通过统计聚集体图像中观测到的微纤维数量，再按成像聚集体的每毫米尺寸进行外推得到。微纤维丰度以每毫米聚集体尺寸为计量单位。聚集体的尺寸分级区间通过以下步骤计算得出：首先基于本研究中实测的聚集体尺寸数据范围，划定若干聚集体尺寸分级区间，随后将落入各已定义尺寸类别的聚集体丰度进行累加求和。