Metal elements

Raw FA/ppm

FA after washing/ppm

Removal rate/%

Magnesium (Mg)

511.65

185.33

63.8

Aluminum (Al)

947.025

281.31

70.3

Iron (Fe)

784.202

175.19

77.7

Zinc (Zn)

11.724

9.07

22.6

Copper (Cu)

7.280

1.75

76.0

Lead (Pb)

2.252

0

100

Arsenic (As)

Vanadium (V)

15.460

2.57

83.4

Nickel (Ni)

15.962

3.74

76.6

Calcium (Ca)

2656.356

1481.50

44.2