Figure 3From: Retention and mitigation of metals in sediment, soil, water, and plant of a newly constructed root-channel wetland (China) from slightly polluted source waterBiplot of heavy metal contamination factors ( C ) in the plant-bed/ditch systems. EHD, ELD, EPB: high ditch, low ditch, plant bed in east wetland; WHD, WLD, WPB: high ditch, low ditch, plant bed in west wetland.Back to article page