Figure 2From: Retention and mitigation of metals in sediment, soil, water, and plant of a newly constructed root-channel wetland (China) from slightly polluted source waterHeavy metal contents in source river and locations of the east (top) and west (down) pilot wetland. Refer to sampling location map in Figure 1. X-axis: River: source river (corresponding to “A” on top X-axis); the first letter “E”: east wetland, “W”: west wetland; the second letter (corresponding to letters on top X-axis) “B”: pretreatment zone, “C”: root-channel zone I, “D”: water lifting and falling zone, “E”: root-channel zone II, “F”: deep purification zone, “G”: wetland outlet; the third letter “H”: high ditch, “L”: low ditch, “P”: plant bed, “x”: the exit of functioning zone; the numbers after “B”, “D”, “F”: locations along hydraulic pathways; the numbers after “H”, “L”: ditch sequence; the numbers after “P”: plant bed sequence; the last letter “a”, “b”, “c”: locations along hydraulic pathways in ditches. Sites on plant beds are for collecting soil and the rest are for sediments.Back to article page