Table 5: SEM-EDS elemental analyses of materials.

Elemental analysis
CONaMgAlSiPSKCaTiFeTotal

S

P154.440.852.728.4118.432.542.004.630.455.52100

C

P113.1537.141.653.100.551.6942.73100
P28.9240.933.302.133.951.347.5631.87100
P312.6449.210.856.435.9412.570.599.041.171.56100
P413.2347.945.042.6313.280.780.650.3411.520.643.95100

OE

P115.3235.682.992.871.3441.81100
P251.952.0111.3618.781.309.545.06100
P325.2543.820.680.6111.9813.720.811.641.49100
P417.7649.200.612.372.170.5726.400.92100

SO

P121.8837.141.443.4310.660.781.3223.34100
P218.7347.962.017.9515.301.723.382.95100
P315.7053.950.742.7624.030.730.431.67100
P415.0850.620.7710.3720.251.291.60100

T

P18.0534.882.052.490.6551.88100
P216.3250.960.8431.89100
P352.173.0810.3731.351.791.25100
P474.4622.391.152.00100